City of Portsmouth, New Hampshire Pease Restoration Advisory Board (RAB), 28 Feb 2022

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From YouTube: 2.28.2022 Pease Restoration Advisory Board

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2.28.2022 Pease Restoration Advisory Board

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Hey everyone and welcome to the peas rap meeting of 28 february of pre-recorded videos.

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So for new members attending and for those that may not know me yet I'm chris king, I am the air.

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Force program manager for pease, and I am tasked with managing the remedial efforts from past air.

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Force activities at bees with me today are fellow members of the air force team. Your community.

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Rab co-chair miss andrea mico, our remedial investigation, consultants from wood.

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Mike daley from the epa and peter sandon from the new hampshire department of environmental services,.

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We are trying a new format for this february rap meeting, making use of this pre-recorded video.

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Segment, I will start by giving a short update on the status of the pfas remedial investigation.

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Efforts to date and present some of exciting new guidance documents issued recently by the dod.

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From there I'll pass the mic over to mr hank andersek and miss amy quinton from wood to.

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Present the validated ri remedial investigation, groundwater results to date and the backyard.

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Produce results conducted last year, as you can see, this will be. Our agenda. Come the 28th when we.

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Have our full rap meeting okay, this video will be played at the beginning of the ram meeting held on.

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February 28th, following the playing of this video, we will conduct some rab administrative business.

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Meet the new rab members and get an update from the city of portsmouth before we have our regular.

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Rab question and answer discussions with the community. At that time the reb is encouraged.

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To ask any questions related to the content of these videos later in the meeting we will allow.

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Members of the community to submit public comments before a journey. The public comment process will.

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Be discussed at the start of the q a session is on the 28th all right next slide. Please.

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Go back to the previous one, my apologies so just to give a a quick update on on the status of the.

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Remedial investigation we will present to you today what is essentially the phase. One results.

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uh Phase one started in may 2021 and ended this winter before christmas.

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Our consultants from wood led the field work and collected over 2 600, individual samples.

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And drilled 76 new wells around former peas, the groundwater and produce data from this.

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Phase one effort are the subject of this ram meeting and will be presented here shortly.

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This has been a massive effort to date and going forward. We are looking to a lot more of the same.

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So we want to thank all of the community members that have given property access for sample collection and have participated in this rap. So far, all right next slide.

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All right um some good news. The dod recently issued a guidance document conveniently called.

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Guidance on using state and perfluoroalkyl substances and drinking water standards.

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uh In circle, removal actions, so what this essentially does is this allows the dod to.

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Consider states not only new hampshire but other states, ambient groundwater quality standards.

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When addressing private wells, this was not the case before we were focused mainly on the epa.

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Lifetime health, advisory limits, and so now we're allowed not necessarily forced to to.

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Address state levels: okay: uh what this means is that certain wells at private residences can.

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Now be connected to city, water or install, you know public or point of use, treatment systems.

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um We're hoping to get some guidance from the air force which is under development as well. Obviously,.

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From the dod it goes to the individual services, and once we receive some guidance from the air.

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Force we can start contacting potentially impacted residents. What this really means is that uh the.

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Dod is engaged and they are putting out these new guidance, and this is really a huge win. Not only.

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For the local community, around peas, but uh any other uh dod impacted facilities. So great news.

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Going forward, this is the start of hopefully a lot of good news to come all right next slide. Please.

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Okay, we're right now we're talking about the remedial investigation.

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um Essentially this this isn't the start of all these efforts. This started many years ago, when.

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They started doing uh you know the baseline uh characterization of the sites um and but.

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We're in the remedial investigation right now, where we're looking at characterizing the site conditions to determine the nature and extent of contamination from historical releases.

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And we're also, during this phase evaluating potential and current.

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Future risks to human health and the environment, based on exposures.

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When we're done with this, we move into the feasibility study and that'll, be.

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Starting around um right after the report is done in june 2023. So in that effort and the feasibility.

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Study we will look to ensure that the appropriate remedial alternatives are developed and evaluated.

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And that so that information can be presented to decision makers to make the proper decision for.

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The future of peace and following some public comment period, there will be a record of decision.

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Where we talk about remediation going forward, okay, so next slide, please all right. So this is.

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An iterative process, and from now um I will turn this over to hank endless, and he will just he will.

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Present to you, the groundwater results the data from this phase, one effort all right. Thank you.

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Thanks chris uh I'm hank and dolcek, I'm a project hydrogeologist with wood.

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And before I get started, I'm sharing the various groundwater maps we've compiled.

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I just want to introduce some nomenclature that I'll be using in my presentation.

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For those excuse me for those who might be first time, attendees I'll start with.

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A general introduction of the geology that comprises the former base and peninsula.

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It's important to understand that, although I'll be showing you maps that appear.

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To be in two dimensions, they provide data. That also includes a third dimension. The geology.

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Across the peninsula plays a significant role in how groundwater contamination spreads laterally.

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As well as vertically, to begin with, the slide on the left is a cross-section of glacial deposits.

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Of a glacial deposit, typical of what you might see across the peninsula.

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In the unconsolidated sediment deposits also referred to in this presentation.

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As the overburden the clay silt sand, gravel and cobbles that have been deposited.

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Were done so by the advancing and receding glacier, the rate at which water can move through the.

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Overburden is somewhat dependent on the grain size of the deposit, in other words, water tends to move.

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More easily in cobbly deposits than it does in silty deposits, the image on the right is bedrock.

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And typical of what you might see beneath the overburden, you can see in the image a series.

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Of vertical and horizontal breaks in the rock those breaks called fractures are how water moves.

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Through the bedrock, the rate at which the water moves to the fractures is somewhat dependent on.

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Their aperture, which is the size of their opening and their interconnectedness next slide. Please.

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This slide is another example of the movement of groundwater through various layers.

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That make up the geostratigraphy across the peninsula. The sponge is an example of how.

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Water moves through the overburden. The sponge has many interconnected pores of various sizes.

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When you, when you soak a sponge, you know it holds a lot of water.

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Similarly, the overburden holds the volumetric bulk of the water in the aquifer because of its high.

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Porosity and interconnectedness, the solid block of wood in the middle is analogous to bedrock.

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If it isn't fractured, there isn't much water in it. However, if you break the block of wood.

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Like on the far right image, water can occupy the fractures, but, as you can see from these drawings.

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That for the same volume of material, the sponge or, in reality, the overburden.

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Holds much more water than the corresponding volume of fractured bedrock next slide. Please.

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Here's an example of a generalized cross section of the peninsula. The overburdened deposits consist.

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Of the upper sand, the marine clay silt and the lower sand, as suggested by their names, these are.

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Deposits of unconsolidated sediment beneath the overburden is the bedrock and the top 10 to 20.

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Feet of bedrock is referred to as the fractured bedrock, which is denoted by the light gray.

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Below the lower sand, this top layer of bedrock is generally highly fractured, so much so that.

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It behaves hydraulically much like the overlying sediment deposits beneath the fractured bedrock is.

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A more competent, less fractured bedrock. We refer to this as either the deep bedrock or just bedrock.

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And for water to be present in the bedrock.

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uh There needs to be fractures. All of these layers contain groundwater as depicted by the blue lines.

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Water flows with relative ease through all the layers, except the marine clay silt and.

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Unfractured bedrock, the marine clay silt is not continuous across the peninsula and where.

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It is absence the upper sand and lower sand are joined, and that unit is generally referred to.

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As the upper sand, where the upper sand is eroded, like along the western side of the peninsula,.

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Where you have an escarpment, groundwater is exposed at the surface along the contact.

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Between the upper sand and the marine clay, silt also shown on the image where the arrows.

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Pointed to the springs where this occur, there tends to be the formation of seeps or springs.

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Springs are simply groundwater seeps that are flowing peaverly brook knightsbrook, pickeringbrook.

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All originate from springs along the upper sand. Marine clay silt contact next slide. Please.

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In these images, you can see what the actual soil looks like beneath the peninsula.

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From the shallowest on the left to the deepest on the right, the left image is that of the upper.

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Sand a little deeper, the middle image shows you what the marine clay silt looks like.

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And deeper still, the image on the right shows the transition between the lower sand at the.

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Top of the image and the fractured bedrock at the bottom of the image next slide. Please.

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Now that you've got a basic understanding of the geology.

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I'm going to move on to discussing the groundwater maps.

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First I'll walk you through the symbology that appears on the box plot and dot plot maps. I'm.

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Going to be showing you just to orient you north is to the top on all the maps that I'll be showing.

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What you see here is a box plot map on the left. These box plot maps were produced as an.

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Alternative to what is known as chem box figures, a chem box figure shows the location of the sample.

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And has a small spreadsheet, with the sample results next to the sample location.

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The problem with chem box figures for this project is that there are hundreds of samples.

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That have been collected across a very large area. Chem boxes would simply be unreadable and box.

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Plots allow you to quickly see based on color the distribution of contaminants across a large area.

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When, when we get the ri report produced, there will be accompanying tables to.

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Complement these figures that will provide specific values for each sample collected.

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So on the left side of the slide is an example of the p fast distribution in the lower sand aquifer.

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The l to the left of the boxes denote lower sand and the key to the lithograph lithologic symbol.

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Is in the box on the right side of the slide, the five colored boxes in a row on the left side.

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Of the slide represent the five compounds shown at the top right side of the slide in that order.

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So the first box is always pfbs and the last box is always pfna. These compounds.

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Were selected because new hampshire has an ambient groundwater quality standard agqs for four of them.

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Pfos pfoa, pfhxs and pfna and pfbs has a risk screening level, an rsl for groundwater.

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These guidance values are shown beneath the listed contaminant at the top of the right side of the.

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Slide their values are nanograms per liter, also referred to as parts per trillion or ppt.

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The color coding of the boxes reflect the general concentration of the compound.

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Specific to that box white means it is non-detect green means it is detected, but was below the.

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Corresponding guidance value orange indicates, it is above the guidance, value and red indicates.

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It is 10x 10 times greater than the guidance value next slide. Please.

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The other type of map that I'm going to be showing you is what we call the dot plot map the color.

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Coding is similar to the box plot maps, as are the contaminants displayed. However, these maps.

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Are contaminant specific this map shown to the right of the slide? Is the phos pfos distribution.

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In overburdened groundwater they're difficult to see on this slide, but there are a series of.

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Dots along the west side of the peninsula that have blue halos and I'll show you this later too.

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Those points represents springs or seeps that were sampled, so anything with a blue halo is.

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A spring or a seep I mentioned previously in the general geology, introduction slide.

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That we consider the fractured bedrock to be similar hydraulically to that of the.

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Upper and lower sand deposits, so on this map we have combined the geologic layers.

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Into just two layers, the overburden which includes the upper sand, lower sand and fractured bedrock.

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And the bedrock, which is all the bedrock deeper than the fractured bedrock. Unlike.

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The box plots which show concentrations of the five target contaminants across a specific horizon.

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The dot plot maps show specific contaminants across hydraulically similar layers, although not.

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Shown in this example I'll also be showing you preliminary concentration contours of specific.

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Contaminants with respect to the guidance values which are shown at the top right of the slide.

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All right so at this point I'm going to begin with sharing my screen and begin with the box plot maps.

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Okay, I think amy needs to stop sharing.

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All right: can everybody see that.

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Okay, thank you. Okay, I'm going to begin uh with the box plot map that will show you um what the.

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Concentrations of the five compounds I mentioned earlier- pfbs, pfos pfoa, pfhxs and pfna, look like at.

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Each sampling location, the data presented on this map are inclusive of all groundwater samples. All.

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Validated groundwater samples collected thus far as part of the remedial investigation, including.

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Samples collected during the base wide and site 8 site inspections, the expanded site, inspection.

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And the routine sampling collected as part of the site, 8 and ames performance monitoring plan.

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The black dash line is the peas development authority, property boundary and I'm going to.

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Begin by with turning on the potentiometric surface,.

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Which is a contoured surface of the underlying groundwater across the peninsula?.

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The high point uh for groundwater on the peninsula is at site, eight, which is up here.

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The former uh fire training area, where much of the a triple f was used.

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The blue lines are called equal potential lines and groundwater flows perpendicular to those lines.

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So I'm just going to draw on here um some to move some things here.

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Did I stop sharing? Yes, he did sorry. It's blocking my.

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Sorry about that I'm trying to get access to part of my screen here we go.

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All right, so I'm going to draw some.

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I'm going to find my.

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Okay, I lost my cursor so if, if rain drops right here, it's going to flow perpendicular to these.

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Lines, so it's heading down in this way. This is where groundwater moves. So it's also it's.

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Also going in this direction, so it's it's running, groundwater, these flow lines or groundwater flow.

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Lines are running essentially perpendicular to these uh equal potential lines, um and so you can.

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See here is that uh the this, the source area is, uh is up here at site eight uh and uh as a result of.

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Its being the high point of the of the peninsula uh there's radial, groundwater flow from that area.

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Which caused a widespread uh distribution of of the contaminants.

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All right, I have to move this back over, so I can grab my hand.

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All right um next, I'm going to show you uh the distribution of the five compounds in the overbird.

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Which consists of the upper sand lower sand and fractured bedrock.

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And I'm gonna, I'm gonna zoom out a little bit to make sure that we have the full.

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Domain of samples collected and we have the one down there.

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And you can see it's it's a it's! It's a bit messy uh as I zoom in there. You get separation between.

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The boxes so uh during the q and a portion of this presentation, uh you know if you have specific.

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Questions about that I can, I can zoom into certain areas, and you can actually we can resolve the you.

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The the sample locations much better, but you can see the l and e f that indicates you know.

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The lower sand fractured bedrock and so on. um So I'm going to just turn this layer off.

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And so I have, uh I have the I have the upper sand, the lower sand, the fracture bedrock and the seeps.

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Which all comprise the uh overburden so I'll turn off these layers and I'm gonna turn on the.

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The bedrock the deep bedrock- and this is what the deep bedrock looks like and what you can see here.

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Is that the first box, which represents pfbs, as I as I mentioned earlier, is mostly white or green.

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Across this area, and the last box which is pfma, is mostly white indicating non-detect most of the.

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Exceedances the agqs exceedances are associated with pfos pfoa and pf hxs. Now.

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Now I'll show you what the map looks like with all the layers turned on, and this gets really busy.

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I know it's it's it's difficult to comprehend. uh What's going on the scale, but again.

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uh During the q, a I'll be able to move around and I'll just I'll. Just give you an example to zoom.

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In uh quickly here, so you can see how how the separation occurs as you get as you get closer.

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To this data, so so we can, we can, you know, talk about it uh in in more detail uh during the q, a.

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So now I'm going to move on to the the dot plot map.

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Here again, you see the pda boundary as well as the locations of the haven, harrison smith, portsmouth.

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And collins wells I can turn on the groundwater contour map, but I'm going to leave it off for now.

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Because this map will get very busy very quickly on this map, as mentioned previously, the upper sand.

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Seeps lower sand and fractured bedrock are all lumped together.

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And called the overburden I'll begin with the distribution of pfos in the overburden.

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As I mentioned previously, the circles uh along the west side of the flight line.

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With blue halos around them uh are seeps uh and or springs. So this I'll see if.

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I can zoom in, but I think it's gonna, it's gonna make the dots smaller but we'll see.

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You can see, there's some some here and there there so I'm going to zoom back out.

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And I'm going to zoom out, so we can see the full scale of the samples collected.

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And make sure there's nothing to the south nope just that one right there. So that's the.

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That's pretty much the full domain back it out one more time. Okay! So that's the full domain.

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Now I'll toggle, through the contaminant specific dot plots next will be.

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Pfoa in overburden so I'll turn this off turn off pfos and turn on pfoa, and I'm.

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Going to toggle back and and show you there's not a whole lot of difference, so that's pfoa.

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And that's phos right there, so not a whole lot of difference uh between the distributions.

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So back to pfoa in uh overburden now I'm gonna look at uh I'll show you pfhxs.

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And this is p f h, x s.

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P f, b s: there will be a big change here.

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And lastly, pfna.

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So I'm going to turn off the overburden layer for a bit.

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And move on to the bedrock layer, so I'm going to turn off the pfna turn off that layer.

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And begin showing you what the bedrock looks like and I'm going to start with pfos in the bedrock.

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So I'm going to turn.

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The bedrock layers and the I'm going to turn all the layers on just so. You can see.

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And this is this is essentially when I do this, it'll be essentially.

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Similar very similar to what the box plots showed.

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Oops, stop that one.

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I think I have everything on okay so now I'm going to turn off the bedrock layer.

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And I'm going to I'm going to turn off I'm going to leave the pfos layer on what I'm going to do.

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Now is I'm going to show you concentration contours for phos detected in the overburden.

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So similar to the dot plots the red lines.

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uh Mean that the samples within the polygon, so I'm going to zoom in a bit here.

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So the the red lines means that samples within the polygons are 10 times the agqs.

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For phos samples within the orange polygons are above the hqs and samples.

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Within the green polygons are below the agqs, so basically those are kind of trace levels.

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Anything outside the orange and inside the green is is traced and beyond. The green is is non-detect.

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So I'm going to turn off this green contour line just just to keep it.

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Just for housekeeping it's a little busy.

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And uh I'm gonna turn on uh groundwater contours um I'll turn on the groundwater contours.

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uh Well, actually, before I do that, I'm gonna explain to you about.

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uh These, what appear to be disconnected blobs. I want to point point them out.

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They are not necessarily so you have a bunch here and here.

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They are not necessarily the result of additional source areas. What is shown here is one way.

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To interpret the data, as I previously mentioned, these contours are preliminary.

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At this time we chose not to connect the outline blobs, that's just for lack of a.

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Better name to call them with the main core of the plume. However, you could connect them.

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In some areas and I'll just do that right now, I'm going to zoom in a little bit and I don't.

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Have um I don't have orange in my color palette here, but I have yellow so we're gonna have to.

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Pretend that my yellow is orange all right, so I need to turn on the groundwater contours for this.

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So it's gonna get busy again, uh and so, if I was going to connect this.

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I connected something like this and that would connect on to that that yellow or that orange.

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Main portion of the the core of the plume, and that would come up kind of come up like that. So.

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They're you connect them like like flow lines, so you try to draw them as perpendicular as you can.

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To the equal potential lines, so so that's that's how it would look if you connected him.

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um So we chose not to connect them um uh these blobs of contamination, because our focus at the.

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Moment is the leading edge of contamination, so you know here here you know here and so on.

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Because groundwater is moving in this direction in in that direction and in this direction.

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um As that poses the greatest risk uh to the potential receptors, furthermore, the heterogeneity.

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Exhibited in the hydrogeology and at times in the sampling data.

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And the episodic nature of the application of a triple f, which is the primary source of.

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Pfas contamination here further support. This is a reasonable interpretation.

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I I need to emphasize that these maps are dynamic and that they will be revised again.

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As more data is collected, so I'm just going to clean up, I gotta find my eraser underneath this.

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There it is clean this up a bit.

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And grab my hand all right so now I'm going to turn off all the the dots but.

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But turn on the red and orange contours for the five p-fast compounds in the overbridge.

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So you can see the interpreted distribution.

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So this is uh well. Let me back up again. This is uh as we I'll zoom.

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Out so we can see the full extent here and I actually missed something tonight.

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All right get the full extent.

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All right and there's, there is one point really far.

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South but I'm not gonna, um maybe I will include it.

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And I'm gonna turn off the contours because it's really too busy with those on.

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Okay, so that's the.

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That's the pfos distribution so.

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And that is the contours.

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And I need to get the data turned off.

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So there, so that's the that's uh pfos contours, I'm gonna do the same thing for pfoa.

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That's pifoa: let's turn that off and let's look at pfhxs.

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And let's look at pfbs.

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And lastly, let's look at pfna.

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All right so now I'm going to turn on all of the overburden contours.

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Get a sense of now. You can see some some somebody's on green. I don't know.

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I'll figure that out in a minute here right there.

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Still have somebody turn on here.

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That's it right there all right, so no green on just orange and red all right. So now I'm.

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Going to turn off the overburden and I'm going to turn on the bedrock and.

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This is uh it contours here. Let's look at the contours.

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And turn that off.

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Hang on so I got too many things turned on here.

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It's a very busy map.

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All right, um so that's pfrost. This is before.

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B

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Not a lot going on there and pfna.

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And again I'll turn on all the layers. Now all the contaminants not layers all the contaminants.

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In the bedrock.

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And that gives you a sense of what's happening in the bedrock. So now I'm.

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Going to go back up and leave this on and I'm going to turn on the overburden.

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And, as you can see,.

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How the distribution of the contaminants in the bedrock fall within that of the overburden.

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This is important because it suggests that the bedrock, at least at this scale, behaves similarly.

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From a hydrogeologic standpoint to that of the overburden.

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This ends the presentation on the distribution of pfas compounds in groundwater and any questions.

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You may have can be answered during the q, a portion of this presentation. Thank you.

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Thanks hank, I will uh re-share my screen and uh introduce myself. My name is amy clinton and I'm.

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A human health risk assessor and I'm gonna be presenting today on the backyard produce.

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Sampling, so let's just get my slides back up.

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Seeing the slides show where we left off earlier.

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And we'll advance it, so I'm going to start by talking about the migration pathways. So how.

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Contamination of pfas from peas could potentially move into backyard produce and pasture grass.

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And then I will talk about the sampling program that we implemented to evaluate this exposure.

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Pathway and then I will talk about the results that we um we have received, so we know that peas.

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uh Has there's groundwater associated with peas that has pfas in it? That is moving off-site.

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This groundwater can be extracted, but by private wells in some cases as drinking water, but in other.

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Cases as both drinking water or irrigation water, or in some cases only irrigation water and from.

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That water, it can be transferred to gardens, so we could see it potentially in soil, gardens and.

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There was the possibility that it could be taken up into fruits and vegetables, so the first part of.

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The sampling program is attempting to evaluate whether or not that migration pathway exists.

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And whether or not pfas could potentially be um coming into the human health um uh food chain,.

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Essentially, through the the eating of uh vegetables that have been exposed to pfas.

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And the second part of this uh sampling event we're looking into the possibility.

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Of cattle being exposed and then people being exposed from potentially eating this beef cattle.

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So there's an extra step in this potential pfas migration pathway. So we know again.

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That peas has groundwater associated with it. That has pfas detected in the farming scenario.

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It's not necessarily, although in some cases the cattle may also be drinking the water, but that's.

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Not what we're evaluating in this scenario, what we're evaluating is that this uh shallow, this.

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Groundwater can become very shallow and, as hank was previously talking about, there's areas where.

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It uh the groundwater comes to the surface, is either springs or seeps. uh There's a lot of like.

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Wet land wet areas around peas and there's also something that we call hydric soil. So.

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Hydric soil is basically uh this poorly drained areas uh that tend to maybe flood out seasonally.

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um They just they don't drain well, they may hold held water for periods of the year.

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And where, basically, the the groundwater is very, very shallow in these areas, so.

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The potential is that pfas can migrate from the shallow groundwater into this hybrid soil.

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And there it could potentially be taken up by grass eaten by cattle, which are then eaten.

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By people, so these are the migration pathways that we attempted to evaluate.

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So, looking at this figure on the left-hand side, um we sent questionnaires out to this northern.

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Portion above the base, and also to this western portion to try to identify.

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Properties uh where residents were either well essentially we're extracting groundwater in.

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um Private wells that were used for irrigation and many of these residents are residents that we.

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Already know have private wells are already in our drinking water system.

C

In those cases, it was a questionnaire designed to to identify what other uses they're using for that.

C

Groundwater are they using it to water, fruits and vegetables, in which case, if we already have.

C

Data for it we could sample. um We could look at the data and say well if there's pfos in it, then.

C

You know that's a potential home that we might like to sample fruits and vegetables at.

C

If it's a home that they have irrigation water and we didn't have a recent sample.

C

Then we requested to sample that water to see if pipas was recently detected. So out of that.

C

Questionnaire process we identified about 16 homes that had pea fuss recently detected in.

C

The groundwater that they were using to irrigate fruits and vegetables, so we asked for sampling.

C

Permission to go to these homes and sample their fruits and vegetables and out of those.

C

We received permission for 11 properties that have fruits and vegetables. We sampled a total of 12.

C

Properties- and that includes three farms, one of which did not have fruits and vegetables.

C

And that's how that selection process was made within that sampling program. We.

C

Sampled, a range of fruits and vegetables at each home. We aimed for around three.

C

But it depends, backyard gardens tend to be very variable. They're, very avid.

C

Gardens that have many types of fruits and vegetables and then you have more.

C

Well, let's say backyard gardeners, who have perhaps a bit less success in their in their.

C

Gardens and only had a smaller number um but we'll talk about what we actually found.

C

And what we were able to sample um in a couple of slides, but this is just to give you an overview.

C

Of how we made that selection process, and so looking at the farms for a couple of the farms.

C

We already had some information to suggest that p-bus was moving through the shallow.

C

Ground water and into potentially the hydro soils on the property and for another farm.

C

We had some upgrading results that suggested that that cost- that was a possibility. So that's how.

C

We screened in that information and again it was very much in discussion with the property owners.

C

um And you know finding out how they're using their their property and what their willingness.

C

Was to allow us to sample, and so as part of the sampling program for the backyard gardens. We not.

C

Only collected fruits and vegetable samples, but we sampled again that irrigation water so that.

C

We could have a really a current time stamp of exactly what was detected at the time of the.

C

Sampling and we also sampled a representative soil sample from each of the gardens with the.

C

Farm sampling, we collected multiple pasture grass samples from each of the three farms.

C

And with that we collected at least one and in some cases more than one hydric soil sample.

C

Which was paired with a very shallow shallow groundwater sample and in some cases we also.

C

Sampled, sediment and surface water, if that was relevant in those particular farms,.

C

And so just again, those green areas that are shown here are where the properties ended up.

C

That we that we were able to sample and um given that you know the extensive effort that we made.

C

To to send these questionnaires out and to contact and follow up with properties that we thought.

C

um You know might be impacted, uh we feel it's a it's a fairly representative.

C

um Cross-Section and in fact, a probably a large percentage of the homes that.

C

Are actually potentially impacted were sampled in the sampling event.

C

So here's just an overview and we'll talk about a little bit more of the specifics.

C

um But so for the fruits and vegetables we saw absolutely no detected pfas in any of the.

C

Fruit or vegetable samples, so, as we said, the pfas was detected in the water. So we know that.

C

The irrigation water did have pipas in it, and in about half of the cases we saw some uh soil.

C

Detection, it was mostly pfos only and at very low concentrations, so we were seeing definitely in.

C

The water, possibly and in some cases in the soil, but none of that was transferring into consumable.

C

Fruits and vegetables, so at this time, based on the sampling round, there's no concern at all.

C

For uptake of pea fuss into fruits and vegetables by this pathway and then looking at pasture grass.

C

We saw no pfos and pitfoa and no pfps, so essentially none of the chemicals that we.

C

Have toxicity values for um were taken up in the hydric soils and there was very little.

C

Uptake at all, we'll talk about a few more details about that. um There were two pfos chemicals.

C

However, it was uh very, um very few very low frequency of detection and very low levels.

C

And none of that was in active pasture areas. So again the outcome of this based on this data.

C

Is that there's no concern for eating beef cattle that are grazing on these grasses.

C

So here's a little more detail on what we were able to collect in this fruit and.

C

Vegetable sampling event, um because there was no pfos detected, there really aren't.

C

Many results to discuss, but we can talk about what we found when we went out and we sampled.

C

So we broke the vegetables and fruits into specific categories. These categories essentially.

C

It's either a root vegetable or it's an above ground, vegetable, it's an above ground, vegetable.

C

It's broken into categories categories based on whether or not it has a rhymed or skin. That's.

C

Removed or is eaten, um these categories aren't very specific to pfas, they're um they're, just.

C

Convenient categories that are used in risk assessment, so we we went with it and if um you.

C

Know if we detected concentrations, we might rethink them, but but in this case um these.

C

Broad categories: work; okay, since we didn't have any detections in any case, but I will just talk.

C

Through what we found so on the top of this graph, uh we're showing the most frequently uh sampled.

C

Type of vegetable- and that is also on the far left side of this little pictorial diagram. So these are.

C

Exposed what we call exposed vegetables, which just means you eat the skin? The skin is exposed.

C

To the air and you eat it, and that includes things like tomatoes, eggplants peppers summer squashes.

C

Cucumbers, I'm sure most gardeners have tried to or consistently grow. Many of these certainly tomatoes.

C

Is one of the most commonly grown plants um in in new england, which falls into this category?.

C

And so you know, we found these on most properties and, in example, those most frequently a subset of.

C

That is this dark, green vegetable. So this is technically it's an exposed. Vegetable.

C

You eat the whole thing, um but we pull them out, because the literature on pfas uptake is.

C

It's somewhat conflicting, but it suggests that um uptake is likely to be more efficient.

C

For leaves of vegetables, so, if there's anything that people are consuming, um it's likely to.

C

Be the leaf that may actually have the most the best chance, basically for peanuts, uptake.

C

So we wanted to make sure that we um we collected as much dark green vegetable as we could in this.

C

Sampling event, and as you can see, we've got about 12 samples, which is roughly one per.

C

Property, so if a resident was growing kale or you know lettuce in some cases, it was only.

C

You know things like sage and basil, which you know. Obviously you don't eat in this larger.

C

Quantity but they're still green plants, so we did collect those where we could.

C

um And then getting into the other categories, where we didn't find nearly as many there were.

C

A few fruits, um not many root vegetables at all, only onions and just the one butternut squash.

C

Our sampling mint may have been a little bit early for the sorts of vegetables that would fall into.

C

That category butternuts pumpkins- they don't tend to necessarily ripen until later, but we didn't.

C

Note a lot of those being grown in the area, um so you know we feel that this craft cross-section is.

C

Pretty uh representative of what is being grown uh locally and as we said, there was no none of the.

C

25 p-pass chemicals that were sampled or were detected in any of the fruits and vegetables.

C

So moving on to pasture grass um just going through I'll start on the right side of this.

C

Figure um so, as I said, there were three farms that we visited and collected samples from.

C

We collected eight pasture grass samples from each farm we collected them in and out of active.

C

Pasture areas- and we also collected them in and out of hydric soil areas. So when we go through the.

C

Results we're going to see that we collected pasture grass samples associated with dry.

C

Soils and with hydrox oils- and we did this based on that information- about potential uptake into.

C

Leaves we thought there was a good chance? There may be uptake in this pasture grass.

C

So we wanted to found it. We wanted to figure out if it was detected in this hybrid soil did.

C

It stop being detected on the edge of the hydrate soil and was it not detected in the dry soil so.

C

So these eight pasture grass samples per farm they were really spread out between.

C

Areas um based on what the soil was like, so was it in or out of these hydrogen areas, and then we.

C

Also gave some consideration to what the farmers were currently using so so are they currently.

C

Using this pasture land, they want to make sure that that's you know. That's.

C

Safe for their cattle, um so we took some samples that were specifically targeted for active pasture.

C

Areas as well as potential future pasture areas, and you know and just testing out this whole.

C

Conceptual pathway, so you know we sampled, as I said, multiple media, so we looked at.

C

The pasture grass we also looked at hydric soil. We looked at dry soil, there was groundwater and.

C

When we collected this groundwater, what we did is we essentially.

C

We dug a little sump, so we basically dug a foot deep hole and let it fill in with ground water. So.

C

If you can imagine that groundwater is really really shallow, it's just in that first foot.

C

um And so that's how that shallow, shallow ground water sample was collected sediment and surface.

C

Water and um we didn't actually collect a dry soil sample, so it was hydric, soil, ground, water, sediment.

C

Surface water and pasture grass that were part of the sampling event um and just to go through.

C

The little bits in the arrow- this is a little reminder of what the conceptual model here and.

C

I also want to mention that this data, um when we look at this, so we have fifa potentially in grass.

C

Water and soil and cattle they do eat the grass. Obviously they drink water. They also do eat some.

C

Soil so the way that we'll capture all of that is that we do have a risk model which can translate.

C

All three of those media into a concentration of potential concentration in meat. So that's where.

C

This all is going, you know once we get to the risk assessment phase. So if we look through the results.

C

Let's talk about the top row first, so we show our location and samples, so this is.

C

A sample number of caster grass samples that were collected in dry soil for that top row. There were.

C

No pfos detected with one exception in these 12 samples, so that 12 samples is half of our.

C

Sampling event, there were a total of 24 samples across the three farms.

C

um And out of that, for all 25 tfas that we attempted to to analyze, for we only found one.

C

Detection and unfortunately, as I said, we did not collect any um co-located dry soil samples.

C

So we don't have an immediate correlation for this uh this sample. However, if you recall last summer.

C

Was a very wet summer, there was a lot of rain a lot of these areas, even though their technically.

C

Dry, soil were were wet, they were wetter than they necessarily um normally would be, and.

C

The shallow groundwater sample that was collected in the hydric soil sample that was on the same.

C

Property did have pfda in it, so that is one possibility um and so moving into the hydric soil.

C

Again about half so we we had 11 samples that were collected of pasture grass that were collected on.

C

Hydrogen soils again: no fifos, no phone, no pfps, none of the chemicals that we have toxicity data.

C

Were detected and no other pfos were detected with one exception, so in the hydroxyls we saw pfpea.

C

Detected in two samples out of these 11. and again, these are very low, conservations.

C

I want to point out that they're j flagged, which means that they're estimated values that they're.

C

Close to the limit of detection for the lab, so these are, you know, considered low concentrations.

C

And I also want to mention that these we did have co-located soil samples for some of.

C

These and what we found is that pfpea was not detected in the soil, but it was detected in.

C

Shallow groundwater, which brings me to my last line, so we took one sample in a spring, so this.

C

Grass sample was sitting in sediment in perennial water, so there's water there all year long.

C

And we collected this sample in um on the advice of the resident, who you know suggested that the.

C

Cattle have in the past and could, in the future visit this spring both for fresh water and also.

C

um To eat grass in this area, um so we collected this sample to well to you know to see what the.

C

Concentrations would be, and what we found is that we were seeing uptake in the grass in that one.

C

Sample so we had six fifos detected in this one sample and when you look at the co-located data.

C

For one of our hydric soil samples and our sediment sample, we had exactly the same.

C

Concentration of p phos in the in the soil media, but we saw uptake into plants in the sediment, but.

C

We didn't see it in the hydric soil, um so it suggests that that uptake could be coming from.

C

More from the groundwater or for the water, so in the case of the spring, it's the surface, water.

C

um Which we know is impacted, so essentially, what we're seeing is you know we're possibly seeing.

C

That the the water media is really um driving any update and uh I think that's also important.

C

To note that, that's what you know what essentially we're seeing in the literature again like the some.

C

Of the literature is very conflicting and it's hard to get a straight story, um but um you know.

C

What we find and what we've modeled in the past suggests that water is really the primary way that.

C

Fifa is, you know, taken up into plants, and that seems to be what these results are telling us.

C

So, just to recap: what we've seen in the pasture grass.

C

We did, as I said, we took into consideration what the active caster areas were for these farmers.

C

And found no pfas was detected in the pasture grass in those areas.

C

The only place we did find pfas, fifos and pipoa uptake, I should say into grass- was in that.

C

Perennial spring sample, which is not currently being used for um for any purposes for cattle.

C

And we did see that limited pfas uptake in three of the pasture gas samples that were um not in.

C

Active pasture areas, but they were in the dry or the hydrate soil locations. um So you know, as with.

C

uh Hank's information, you know, there's still analysis to be done. You know and we're we're.

C

Figuring, uh you know we're we're figuring out how this will fit into the risk assessment process.

C

And where we go from here and that's everything I wanted to cover today, so I think I will hand.

C

It back to chris who will go through what we're going to talk about next time. Yes, uh thank you. Amy.

A

So obviously, from this presentation everybody can see that this was a great deal of information.

A

Which is why we limited this to the groundwater results and also the backyard produce so for the.

A

Next rap meeting, which will be in april, we will be talking about the remainder of the the media, so.

A

Soil, surface water and sediment results, and, along with the recent shellfish and fresh freshwater.

A

Fish and poultry egg results, so that should be a fun conversation as well. Next slide, please.

A

There it goes okay, so uh obviously just a reminder of the remedial investigation timeline. It did.

A

Start back in may of 2021, and it will be phase two will be starting here shortly and it's going.

A

To go into the fall of 2022 administratively, we have expect our draft ri report scheduled.

A

To be complete march, 2023 um all right! Well, that brings us to the end. You can go to the.

A

Next slide, but I just want to thank everybody who has participated in the making of this video. This.

A

Is uh this has been a an interesting process uh following this video you as the same location.

A

Where you've linked up to view this video, you can also find the tour of the grafton drinking.

A

Water plant operated by the city of portsmouth. We encourage you to check that out and otherwise.

A

We look forward to seeing you on the 28th of february, where we can discuss this video and any.

A

Other data further, um this will be a virtual wrap and we hope to see you there all right good night.

D

Welcome to the virtual tour of peas, water treatment, plant.

D

Located at 97 grafton drive in portsmouth is the peas water treatment plant constructed from 2019.

D

To 2021 p's water treatment plant has a maximum capacity of approximately 1200 gallons per minute.

D

And serves the entirety of peas, international trade, port in a portion of the town of newington.

D

The source water that supplies pea's water treatment, plant.

D

Is pumped from three groundwater wells, harrisonwell, smithwell and havenwell.

D

Pea's water treatment plant was designed to treat for per and polyfluoroalkyl substances.

D

Also known as pifas pifas are removed as water passes through 12.

D

10 foot tall filters that are equipped with a specific type of media called resin.

D

Prior to the resin filters, water passes through one of four cartridge filters.

D

These cartridge filters capture any suspended solids.

D

That may be in the water water, with a reduced amount of suspended solids.

D

Flows freely through filter media, minimizing the chance of fouling or blockage in the resin filters.

D

After the resin filters, water is then filtered a third time through one of three 25 foot tall.

D

Granular activated carbon or gac filters. These gac filters are the final polishing filters.

D

That would capture any pfas substances in the event of any breakthrough from the resin filters.

D

Granular activated carbon is also effective.

D

In filtering out other contaminants, including any taste and odor compounds that may be present,.

D

As water exits the gac filters it is injected with chlorine for disinfection.

D

Phosphate for corrosion control and fluoride for dental health. After this chemical addition, the.

D

Treatment process is complete and water enters the distribution system to be used by the public.

D

Pea's water treatment plant is outfitted with inline analyzers.

D

And instruments that continually measure water quality parameters.

D

Also inside the plant are two booster pumps that connect the portsmouth water.

D

System to the peas water system, these two booster pumps are each capable of pumping.

D

600 gallons per minute from the portsmouth water system into the peas water system,.

D

Over the past seven years, these two portsmouth booster pumps played a significant role in.

D

Supplying peas, trade port with enough water to meet daily demands, the peas, water treatment.

D

Plant is also furnished with a control room that houses, benchtop, laboratory equipment.

D

And two scada computers which allow operators remote access to data and supervisory control.

D

Thank you for coming along on this virtual tour, see you at peace.

E

Thanks everyone.

E

Welcome um we're starting the live part of our.

E

Peas, restoration, advisory board meeting, rob members, we love it. If you turn on your cameras,.

E

Hope everybody got a chance to eat a little food happy to see you all um and.

E

Kim, do you want to say a little bit about technology and then we'll jump into content.

F

Sure thing: hi, everybody, I'm cameron, hager with cbi and just a quick little overview of the webinar.

F

Format, um basically, if you are a panelist, you are going to be able to raise hand, chat and.

F

Unmute your microphone when needed. If you are an attendee and a member of the public.

F

You will see that you have limited controls at the bottom of your screen. You're really going to have.

F

The raised hand function at which point um either owner. I will unmute you and I'll, be during the q, a.

F

Portion of today's proceedings, um but other than that we will just let you know you can.

F

Message on our directly, if you have any questions about the technology or as well.

F

And yeah other than that pretty simple formats. But if there's any issues just let us know.

E

Thanks cameron, um welcome really happy you're here, rad members, it's fine! If you had stepped.

E

Away from your computers, if you'd already seen that presentation, but if you are back it would.

E

Be great if you could turn on your screen, so we can kind of be accountable to each other to be.

E

Present, thank you all um tonight um we're trying a new model. You just experienced it. This is the.

E

Model um so that um rab members had asked for the recordings of the presentations in advance.

E

So they could watch them a couple of times pause review in addition to getting the presentation.

E

Slides in advance, so we tried that and at the end of the meeting, we'll send out a little evaluation.

E

And ask for your thoughts on how that worked. um It also shortens the meeting conceivably right.

E

So you could watch the presentation first and then this be here just for this two hour block.

E

um We have two hours of really inter interactive um session now, going forward, we're gonna introduce.

E

Our new members, which is really nice, we'll do a little bit of committee business and then.

E

We have about an hour for open conversation for questions, comments, responses from the web.

E

To chris hank amy um about the those that kind of major technical presentation that you just heard.

E

And then we have 15 minutes for open discussion with rab members. As you recall,.

E

The rab have asked for just time where they can bring up anything, that's on their minds.

E

And talk together, that's also where, if you have questions for brian about.

E

The water treatment piece we'll go, although brian, I have you up for a couple of minutes um right.

E

At the end of our sort of business great and then we have time for a public comment at 8, 30.

E

If you would like to make public comment, um those of you who are um watching this you're.

E

Very welcome I'm going to ask you to email, linda geisinger, kim. If you have a second, can you put.

E

Linda's email into the chat by 8 10, so we can just manage for time um and then we'll do a.

E

Meeting recap: next steps give people a chance to share final thoughts on the rab before we.

E

Adjourn at nine, that is the plan questions about the agenda. I should say it was developed.

E

And we always welcome all your ideas and topics. um Okay, so that's the agenda. We are going to.

E

Start by welcoming new members, so we have 20 seats on our restoration advisory board.

E

I believe seven of them are appointed seats and 13 of them are for community members and those.

E

Seats have two-year terms renewable, so people can keep serving, but we always check in with everybody.

E

After two years to say, do you want to keep serving, or is this a good time that you want to step down.

E

We had people step down and we had people join in equal numbers. We are really happy to have three.

E

New community members and I'm going to give you a chance in a minute to introduce yourselves. We.

E

Also have a new appointed member because colonel pogoric has stepped down, so we will also introduce.

E

Matt casey in that role, so I think chris, is there anything you want to say before I.

E

Myself, um none of other than I'm also included in this in this open discussion.

A

Will be the regulators as well so um other than that? Just please proceed. Thank you.

E

Great, um so I'm gonna invite new members. If you just will do intros of everybody who can.

E

Be seen here on the committee, I know you're sort of walking in we're really happy to have you.

E

And if you would I'm going to each of you and just ask you to introduce yourself, you know in.

E

A few sentences, what why you're here with us and what drew you and maybe where you live or where.

E

You work, as is relevant, um so I would ask samuel: would you go first sure hi? My name is sam beam.

G

I'm pretty new to the newington area. We just moved my wife and two daughters, just moved here in.

G

November and um we're right, alongside pic or mcintyre, brook rather.

G

So pretty close to the action- and um I uh I was doing some research on.

G

What's going on with the brook and the water and the you know, the.

G

Whole situation and came across previous meetings of the um rad meetings and uh and.

G

Ended up sending an email, I think and and basically got myself volunteered, but.

G

I'm very pleased to be a part of it and it's a lot of interest very interesting and very important.

G

Stuff going on so um I'm glad to be getting a good intro and um I can't wait to dig in.

E

I'm glad to have you. Thank you um russell over to you, nice, to meet all of you.

F

I'm fairly new to newington as well having moved here and uh about three years ago. Two years ago,.

F

I came out of uh my past company for the past 20 years. We were doing epa related um work as well.

F

As conflict, minerals, work and um mike donahue, who I've known for many a year, suggested that.

F

This would be a wonderful place for me to keep current with. What's going on with the p's.

F

Efforts on discovering and tracking and monitoring and remediating uh all the pfas chemicals so.

F

I'm looking forward to uh joining helping out where I can glad to have you. Thank you, um william.

F

Hi uh I'm bill mcquillen uh I serve as the city's city of portsmous assistant, fire chief. I've lived.

F

Here in portsmouth, since 1994 and I've been a firefighter here on the force since 1990.

F

um My uh involvement includes being on the safe water advisory group for the city of portsmouth.

F

And uh through that, uh through that group I was uh given the opportunity to come along here uh in the.

F

Past I've, uh I've done some advocacy and some work with the state firefighters union around.

F

The the prohibition of a triple f foam on the reporting of uh pfas in our firefighting.

F

Ensemble and working on uh some laws to remove flame retardants from a lot of the the furniture.

F

uh In that that we have so uh that's a little bit of my background and my experience, I'm happy to.

F

Be here and good evening, everybody thank you and um matt casey. Are you able to introduce yourself.

E

We can come back to him um great, it's nice to have um nice to have all of you nice to be at our.

E

Full our full capacity here, um oh matt, is saying he's here. Matt, do you know how to can you unmute.

E

And you want to introduce yourself.

E

Oh for a second, it was working there you go. Can you see me and hear me we can hear you.

F

All right, great yeah, so I'm matt casey, I'm the environmental manager over at pease.

F

Air national guard base and I'm going to be replacing colonel john pegorick.

F

As the rab rep for the guard, um I've been doing this job for three years so far, but I do have.

F

Over 20 years experience in the environmental field, I grew up in the seacoast of new hampshire.

F

I have worked extensively in the pacific region for the air force on a lot of similar former.

F

uh Defense sites doing circular work, so I'm very familiar with the process we're going through here.

F

And uh very interested in and seeing how this plays out and happy to be part of the rap. So.

F

Thank you. Thank you. Thank you and colonel pogba. I'm sorry not to be able to be here tonight and.

E

um Say thanks to everyone, so he sends his regards. I know: um let's we're gonna, do quick introductions.

E

Of the rest of the committee, so people know who's in front of them and then we'll do a little bit of.

E

Business and keep moving so committee members, I'm going to call on you.

E

And just if you'll just say your name and your affiliation, I think um andrea and then mike.

H

Hi everybody, my name is andrea amiko. I am the community co-chair of the rab.

H

um I'm a portsmouth resident and a co-founder of the community action group called testing purpose.

E

Thank you, and I realized, I should say mike daley next and then michael donahue,.

I

Fair enough yeah, my daily uh us epa region, one I work out of the boston office. um I've.

I

Been a project manager overseeing the uh the super fun cleanup of the base for.

I

A long time, it's still here so thank you. Hopefully it's doing well tonight, mike donahue and I don't.

E

Know how we get you on sideways yeah I've been I've been working on it, I'm not doing too well, but.

F

I'm going maybe it's because I came down to florida and I'm not in newington, but I've.

F

Gone sideways, uh but I uh I'm glad to be here meeting and see the new folks that have joined us.

F

And I I really am encouraged by the format it's great thanks, brian and then joan.

J

Thank you, ona brian goetz, deputy director of public works, one of.

J

The uh older faces here been involved with the pfas project, uh so to speak.

J

um Since we were notified that the contaminant was in the haven well in may of 2014.

J

So also not on screen but support role. Al pratt, our water resources managers on.

J

And tim green, a big shout out to tim, green tim, is our manager of the peas water treatment facility.

J

And tim was the producer director and videographer of that great little uh video, giving you a tour of.

J

The facility so good job tim, maybe we'll we'll, give him a an appearance here at an upcoming rap.

J

Meeting here so or maybe, eventually, post covid, we might have an opportunity to take everybody on a.

J

Tour of the place, thank you that would be so great um joan and then chris okay hi, I'm joan hamblet.

K

um I am a resident of portsmouth and I'm also a state representative um and I'm relatively new on.

F

On the rab, um this is still my first term, I guess you'd say, and I guess my claim to fame is that I.

F

I worked at pease for a while and drank the bad water, so waiting to see what's gonna happen to me.

C

But I'm I'm involved in the the peace testing as well. So um thank you chris and then mark.

A

Chris me, okay, so I'm chris king, I'm the air force program manager for peas, um fairly new.

A

To the program, still I've been with the air force uh here and uh associated with this program for.

A

About seven months now, so I'm looking forward to being with you guys for the long haul. So.

A

Get used to seeing my mug around, I suppose thank you. Thank you mark and then kim.

E

Mark you're, muted.

E

Should be at the bottom left, maybe there's a little microphone button.

L

How about that yeah there! You are top right.

L

I had to switch from my computer to my my ipad because I didn't have a camera on the computer.

L

Anyways, I'm a 45-year resident of portsmouth, um mostly retired aquatic ecologist, and this is my.

L

Third term on the rab thank you kim and then peter I'm kim mcnamara, I'm the health officer for the.

M

City of portsmouth- and I think I've been learning about fifa since 2014- does that sound right, ryan.

M

And been with the city for 17 years, thank you peter and then um then hank.

G

Hi folks peter sanders, I'm the project manager for the department of environmental services for peas,.

G

Been involved since I started with des involved with pieces, I started with ds in 2014 and uh prior.

G

To that I was in private, consulting also stationed on base and drinking the water, so we're all in.

G

This together, thank you, um hank and then amy. Since you are here, it's good hi, I'm hank and dulce. I'm.

B

uh With wood, I'm the project hydrogeologist and I've been working on this project since uh 2014.

C

Great amy, hello, I'm uh amy clinton, I'm the wrist.

C

Assessor with wood and I've been on this project, since I think 2017. thank you, maria.

F

Hi, I'm maria stoll with the peas development authority. I manage the engineering department.

F

There and I've been there for 28 years. Thank you all. I think we've got everybody who's on our.

E

Screen mike donahue, I'm happy you s, you're you're, forward, you're, upright good news. um All right.

E

Let's go to um we wanna we're gonna. Do a really quick poll. I think cameron's gonna launch that.

E

For everyone, I think it's gonna go to everybody who's here tonight.

E

To just ask we just want to understand when people watch that presentation as we're trying to learn.

E

As we go so if you would just choose when you watch the recorded presentations.

E

In advance, just now, neither or both that will be helpful for us.

H

Oh now, for me it's saying: hosts and panelists cannot vote. Oh, so we're only getting the attention.

E

That didn't work. Okay, we'll have you do it in the evo. Thank you it. Let me vote it. Let you vote.

E

50 50., oh my gosh, I voted as well, not statistically all right thanks. Everybody.

E

We tried, I voted twice perfect.

E

All right, um we have a meeting summary to approve from september. I'm sorry, my apologies. We forgot.

E

To send it once we had, we had sent it out to all the rab members. You saw it like two months ago. We.

E

Got one person who gave us some feedback? Thank you and we incorporated that. I sent it out like three.

E

Minutes before the 6 p.m start. um So it's fine. If you want a week to look at it before we approve it.

E

Just let me know now or if people don't need that time and trust we made just a couple minor tweaks.

E

Which I mentioned um mike go ahead. uh I was the one that uh gave you the feedback and I reviewed.

F

It quickly in those minor tweaks are great, they're, perfect and I'd like to see it approved and.

F

Just keep this uh going quickly, thank you, any different opinions, or we will consider it approved.

E

All right, thank you um and then brian. I think we wanted to give you the floor.

E

For just a couple minutes, I don't actually know the details there, but over to you.

J

Well, chris had just said uh provide a a quick, quick update. Everybody got a nice tour there.

J

um Again, thanks to tim, green and if you've, driven by the facility right there on grafton, drive.

J

It's been up and operational since april of last year as far as the resins go prior to that.

J

The harrison and smith wells were being treated.

J

Since september of 2016 with granular activated carbon, so now we have the the dual system.

J

Of the resin filters in front of the uh the water going through the resin first.

J

And then um to the uh to the carbon and then to the system, and we monitor it initially, it.

J

Was weekly and then after a good uh sampling and seeing uh the performance which was non-detect, we.

J

Have shifted to monthly sampling, which we continue and to date everything is still.

J

Non-Detect and we've got the uh the haven well was, was reactivated, which I did present.

J

At the november meeting it was reactivated in august, so it has been in the system and.

J

Operational since that period of time, we generally run the system, all three wells for the most part.

J

Together, so it's a blend of those three wells, but they all go through the treatment together.

J

And everything again as we monitor the system to date is non-detect through the filters. So that's.

J

That's very good news there and we're continuing to work with our consultants been with us through.

J

This project, and also the air force and their consultants on assessing at what point we would be.

J

Getting to the point of change out, but that will evolve here in time. As as we continue to gather.

J

Performance data from those filters and again all all pointing in a pretty good direction with that.

J

So with that, that's pretty much what I wanted to say and we'll continue to report. We've reported.

J

This and some of the data um on the safe water advisor group their meeting last week and we're.

J

Preparing our annual water quality reports, which, at the next meeting I'll, be able to.

J

Get out to everybody um to see, in summary, um all the the data there um for for the year.

E

Thank you um let's, so I think we should let that any questions for brian come up a little bit later.

E

If that's okay, thank you brian. I appreciate that um and just jump into general discussion.

E

So now we had this presentation, we didn't right, there were no interruptions, hopefully.

E

Some of you had a chance to watch it ahead and pause if or go back if you needed to, but.

E

I'm going to open the floor to rab members um for those who are new or as a reminder, because it's.

E

Been a little while, since we've had a meeting, you can use the virtual hand raise function.

E

Or you can put a note in the chat that you want to comment or you can just try to get.

E

Our attention- and we will um call on you and try to take things in kind of a logical flow.

E

So um inviting rab members responses questions about all that water and produce.

E

um Content, what did you hear? What are you curious about um andrea? Why don't you start us off.

H

Sure, thanks so much ona. um I just want to say also thank you to the air force and.

H

Wood for preparing all of this, ahead of time and brian um to tim too, um I I thought it was.

H

Super helpful to get the information ahead of time, especially this data is very technical and.

H

I think I had told you I kind of glazed over watching the maps, the first time so being able.

H

To watch it a couple times just was helpful and having it ahead of time. Just made it a lot.

H

Easier, so thank you very much for the effort that went into putting that together for us.

H

I really appreciate it um so hank. I just have a few questions for you, so definitely having.

H

The color-coded bullet, you know dots were very helpful um from like a visual perspective, but.

H

I'm really curious if you can elaborate a bit more on the actual levels. So I know the red dots were.

H

10 times over the standard, but I'm just curious: if you can, you know 10 times over could be you.

H

Know 100 parts per trillion: it could be a hundred thousand parts per trillion. So are you able to.

H

Just elaborate a bit more on the levels of pfas or like uh give us a general range of like maybe the.

H

Highest detected pfas that you found and then also I know that you reported on you, know five pfas.

H

But it's my understanding that you tested for 25 pfas. So if you could also let us know.

H

How many pfas were detected? um Was it just these five? Were there additional pfas detected.

H

um Because I think you know one of the things we've said in this round from the very beginning.

H

Is that our community cares about all the pfas in the water like not just two, not just four or five.

H

Like everything- and we know that a triple f was a mixture of pfas compounds, so.

H

It's important to us, um even if there's not standards or regulations or health advisories.

H

It's important that our community know exactly what you're testing for what.

H

You're finding and at what levels, kind of regardless of those regulations. Thank you.

E

Let's yeah, let's go to hank to respond and then kim you'll be up next.

B

Okay, um thanks andrea uh yeah, I'll um I'll I'll share with you. What I can uh what I can.

B

I'm gonna stop stop my video but uh I'll start sharing. My screen here in a moment.

B

Anybody see that yet oh yeah, try that here how's that yep good okay. So um so uh I can the the long.

B

Answer um uh andrea is that, uh based on on this, this is just an example. uh What I showed earlier.

B

In the in the video presentation, this is the p foss in overburden distribution, and uh you.

B

Know just from these dots, I I can't I I can't tell you exactly what what each one of these. Oh, I can.

B

Well, what I can do is um I'm gonna try to move my. uh What you can't see is on the top of my screen.

B

There's a there's a banner that I need to move and if I accidentally stop sharing there, we go um so.

B

I can, I can go like that, and it gives me a value of 0.047, uh but that doesn't that doesn't really.

B

Help you out, um I have a table that I prepared uh that I I will share with you, uh and this is.

B

A summary of uh there's 25 compounds um that we analyzed for and- uh and this is the the highest.

B

Concentrations that were detected of those 25 compounds, the yellow, highlight highlighted.

B

Compounds are the ones with associated agqs values and also we have pfbs in here, because.

B

There's a risk screening level, so there's there's the four agqs values plus uh pfbs.

B

And these are in parts per billion, so in parts per trillion add three more zeros, and uh this is.

B

The highest concentrations detected and here's uh all the other compounds that you were asking.

B

About the highest concentrations detected- and I can I can get this to you- I can send you this.

B

Summary- uh and these are the locations, so most of the locations uh are at site. Eight.

B

And most are either on the in the fire training area or in the trough.

B

uh So, essentially, um uh in the extraction well network in in the collection system, uh there's.

B

uh There's one: this is the site. This is ames uh down here. uh This is the ames extraction.

B

Cutoff well spf na pfna, uh and then we've got some other ones associated with them. Landfills.

B

So hopefully that answers your question.

H

Yes, it does thank you and it would be helpful to be able to get a copy of that document, because.

H

I mean just looking at it quickly. It looks like there's some put some places with some really high.

H

Levels of pfas, um and also it looks like there's a lot more than just five detected. You know and.

H

I think again, that's that's what's important for us to know you know, because again we don't we're.

H

Not just exposed to five or our community hasn't been just exposed to five we've been exposed to.

H

Many so that's just helpful to know. Thank you sure, all right, let's go to kim and then mark.

E

Come here, you're on mute.

H

Now perfect, thank you. um We've been pretty.

M

Overwhelmed dealing with code, so I'm feeling a little behind, so these questions are.

M

Really just to catch up with the group, because I missed one or two meetings.

M

I really appreciated the pre-recorded presentations and I really appreciated the detail.

M

They went into because it just helped reframe things if I understood correctly um bedrock.

M

You know is fine if um it's not broken, but when it becomes broken and cracked. It acts just like.

M

The overburden, and so how much of the condition of the bedrock out at pease is going to play into.

M

The long-term cleanup goals and are we thinking about things like if there's further construction.

M

Of you know, new airport um features or, if there's just new construction on pda property.

M

um Is that going to be figured into the uh remediation plans? That's my first question.

E

Thank you hank. No, I guess I'll take that one and uh if anybody else wants to jump in please.

A

I mean there are um developmental restrictions already on the pda, particularly when it comes to.

A

Breaking that ground and interfering with that water and harming wells in particular, so our.

A

Is what's going on at the pda going to be factored? And yes, of course, that's um that is in the and the.

A

Overall extent of this of this contamination as well- but that's that's kind of the short answer.

A

But yeah for them to there's a big process in place already, should they intend to develop.

A

Something new that that cracks the surface, especially around active monitoring wells. So if.

M

There is going to be additional airport services due to additional potential airport development.

M

There will be preconditions that these developers will be well aware of before they get any permits.

M

For that is that what I understand you to say chris? Yes, but I would also like to defer to the.

A

Pda on that, if anybody wants to jump in, but you do have your own internal processes for this as well.

A

Anybody from the pda want to jump in.

F

Hi um yeah, I guess just to restate what what chris said I mean since, since the beginning of.

F

Development of peas, we've worked with the air force and whenever we've been in contaminated.

F

Areas we go through an approval process where we present the a plan to the air force and to the epa.

F

And des- and um it is reviewed so that you know we're not moving water around we're not moving.

F

Plumes around so that um developers or workers know that they're in an area that there might.

F

Possibly be contamination so uh that this process is is well established at this point, thank you.

M

uh One point was made during the presentation that uh p f, o s- p, f, o a and p f h, a x s. um You know.

M

We're at exceedances, but even if those exceedances are mostly related to those three compounds, does.

M

It matter when it comes to the remediation remind me: is remediation for every fifa compound the same.

A

Again, this is chris. um These chemicals are very similar, I guess in their structure in nature, so.

A

And you can see from the data that brian gets supplied as well they're, starting to.

A

See non-detect, basically, for all you know, pfas related chemicals that they test for as well. So.

A

The treatments that are currently available to us seem to be treating all of the pfas that we.

A

Test for to some regard there is, there are some smaller chains that do that could break through.

A

Eventually and we're seeing some evidence of that at site eight, but it's basically when things need.

A

It's an indicator that things get changed out. Then we do, um but hopefully new technologies.

A

We're keeping an eye on them as we move further and further into the future, with the science.

A

Hopefully, some new things will pop in there and uh yes and make sure they keep treating all.

A

These ones that keep getting identified and the current ones that are regulated as such. Thank you.

E

Thank you um mark. You are up next. Okay, thank you. um You know, I must say that I was.

L

Absolutely stunned by the gis use of the contour mapping, well, mapping and data.

L

In hank's presentation absolutely loved it.

L

Which got my mind running a little bit with it and.

L

Humor me on this hank um because it's really a naive question, but.

L

Could you take the volume of each contour of each concentration level of each of say the five.

L

um Pfas chemicals, that you showed us and estimate.

L

I'm looking for like a lump sum number and and estimate um say how many pounds of each one.

L

Is encompassed in say the top surface sediment layer or something like that.

L

Because what I've been struggling with, since the tour that we had of the remediation plant, the new.

L

One on the upper east side, northeast side of um off of arboretum drive, is.

L

We have a number of how many gallons of water is being treated and dumped back into the ground.

L

But I want to put that in perspective with what's in there. In other words, is it.

L

Arbitrarily 50 gallons out of 500, or is it 50 gallons out of 50 million.

B

Yeah, I understand what the question is and.

B

Yes, you we can, we can certainly go through that exercise. uh I mean there's.

B

There's limitations to it, um uh and but I I I suspect, uh that we're gonna end up doing that.

B

Anyway, uh as part of the ri report evaluation uh and specifically, the fate and transport.

B

Modeling, uh that's that's going on, because we're gonna have to have a source term in that.

B

But yes, I mean it's a it's a fairly, I mean again, there's there's it's not exact at all, but you know.

B

It's a it's it's it's a very straightforward calculation, at least for the overburden.

B

Bedrock is a whole different thing because we don't know what the porosity is per se. So that's.

B

That becomes more difficult, but but the but most of the transport is occurring in in the overburden.

B

So yes, we can, we could come up with that and- and I suspect our modeler- I'm not the modeler.

B

Our modeler will likely do that and we can actually use gis to do that function.

L

Yeah, I'm waiting for the movie yeah right um no, but because it's dynamic too, you know.

L

It's spreading it's diluting right um from the source, for example, or sources.

L

um So so yeah, you know snapshots in time put together, um but um yeah then link it back to.

L

Just you know: you'll have enough information from the um performance of the remediation.

L

Plan um to put the two together and see if you're, making a difference or not exactly.

E

Thank you, let's go to um jean and then brian, then kim.

F

Hello, can everyone hear me: uh I have a one question on the remediation: uh how many gallons.

F

Since the start of this project has been gathered or I I saw a tank there and I I.

F

Remember seeing I never asked how many gallons of pfos was actually collected, but how much has.

L

Actually been pulled out of the ground and how much has been totally pumped out of the ground.

B

I don't have that answer uh that that was actually brought up at the last rap meeting.

B

When we uh had to break out on site eight and uh uh the the operators uh at both plants had those.

B

Numbers at their fingertips- and I unfortunately I I don't- have those those answers. It was roughly.

G

About 500 million gallons of groundwater have been pumped from the two remediation systems and on the.

G

Order of I don't know 30 or 40 pounds so far of individual uh pfast compounds. So that's a total of.

L

How many gallons of a triple f or of all the phos compounds, approximately.

G

I don't know what that translates to and that's not the point. So much of.

G

The remediation it's the hydraulic, control and reinjection of the clean water from a.

G

From a cleanup standpoint, there's there's still you know the vast majority still in the ground.

G

But really it's establishing that hydraulic control and flushing the clean water back in.

L

uh And uh another question is: are there any uh if they have de-watering projects or any construction.

F

Projects at peas are they uh required to do something with the water tested and or treat it.

G

Yeah, so that's part of that process that maria and chris touched on earlier anytime, there's.

G

Going to be, basically when pda is alerted through a development or any kind of.

G

Investigation work that's going on if a dig safe permit is is generated, then they will.

G

Look at where that work is being proposed if it's in an area of the contamination.

G

Either the historic legacy, contaminants, the fuels and the solvents and things or in pfas, then air.

G

Force des and epa we get together. We look at the work, that's being proposed if it's construction.

G

Work with dewatering, then we alert a pda to to alert the developer. That they'll be encountering.

G

You will or will not will not be encountering contaminated groundwater that should be properly.

G

Managed or if it was a contaminated soil or whatever it might be for that particular area,.

F

And now one more question: this is for brian I'll, just say last but not least for that, if there is.

G

Construction dewatering, um so the groundwater that's being removed, has to be filtered.

G

Then that process would be managed by our des drinking water and groundwater bureau through a.

G

Temporary groundwater discharge permit process and has that has that occurred at all.

L

So they have to bring in a remediation trailer or do they? Okay and the other question is for.

F

Brian is too one is uh what what are the what's the final: where are they putting the final pfos.

L

That's all spent that I know that they- I heard incineration and all of that a couple of years ago.

F

Is that still? Is that still where they uh ultimate, uh where the spent carbon goes and the resin.

J

Yes, the the previous changeouts of carbon have been incinerated, so the.

J

Carbon vendor, with the same actually show up with the fresh carbon, and they have a two.

J

Two bay uh trailer that actually, the one bay takes the old um carbon out of the filters and then.

J

The new carbons put in um we are working on a overall plan for the resins, but uh you know that.

J

Is a is a work in progress right at the moment we don't imagine having uh currently given the.

J

The performance um it'll it'll be some time before we have to change those out.

J

Okay, thank you. So I tim did uh tim green did give me an update, we're at 170 million.

J

Gallons to date, through our system, so that's that's the volume there. I had.

J

Two questions uh the first one I thank kim for for bringing up this point about activities of peas,.

J

It reminded me that there's been discussion. Many a meeting about the groundwater management zone.

J

Whether that's been updated so now, given all this new data, whether there's.

J

Going to be a again a new groundwater management zone map for uh for the pfas.

G

Yeah I'll take that so that is, that is one of the many outcomes of the ri will be, is to find.

G

In the nature and extent, and part of that is the nature and extent in groundwater. So what.

G

Is the full extent uh conservatively that it's impacted, and once we know that we can establish.

G

The groundwater management zone- okay, great um so the other. The other question was about um the.

J

The sediment sampling and whether there was correlation of the when.

J

The sediment sampling was done, whether it was correlated to any of the groundwater sampling.

J

Might be a hank question or amy.

B

I think you're gonna have to get more specific with your question brian, I don't quite.

B

um Well, I mean when, when you you know some of your data, that you're gathering of.

J

Essentially, the above ground stuff or the uh the plants um and stuff whether or not.

J

You know that's correlated with either water, that's gone by um in the uh the streams or.

J

The water that's underground in the area, so I guess it's an amy question. Yep.

E

Amy you want to take that. um I'm not sure not sure I have an answer for that.

E

So it sounds like well. Well I mean brian, I mean the the the streams leaving the the the.

B

Former base or or surface waters leaving the former base are, are contaminated, so uh so surface.

B

Water is contaminated. For the most part, uh the groundwater uh in in areas uh are contaminated. The.

B

Hydric soils, uh uh some of the I I don't recall, amy uh some. You might help me out here, but some of.

B

The seep uh samples that we took from the hydric soil zones uh or contaminated, but I don't think.

B

There's a link we couldn't, she wasn't able to make a link between that and the plants and the only.

B

Link that appeared to occur was when the plant was in the water. It was growing in the water uh and.

B

That that came back that plant came back, elevated thanks, hank, let's go to we'll go to kim and then.

E

Mark and then sam yeah, um I think what it was cam's introduction. He made a point to say that.

M

We can now use state standards for remediation instead of the federal ones or the ones we used.

M

To rely on is that the rab's choice about what standards are used for cleanup at peace.

E

Chris, I think, that's probably to you.

E

Yeah yeah, sorry about that. It's also, um basically it's a little more complicated than I know. I have.

A

Some legal people in here that may want to jump in, but um the state standards are really only.

A

Considered when a a federal standard is first violated, of course, we know that that has occurred.

A

On ps- and so it's not really, you know it's, it's one triggers the other, and so at that point some.

A

Of the state standards move in but then it's a you know. Of course we established the epa's. You know.

A

They set the cleanup level the goals at the end, along with new hampshire and the air force.

A

At the uh record of decision time, so those those standards and cleanup goals will be established.

A

You know a few, you know some steps down the road, but um short answer is because go ahead. Thank you.

K

Yeah this this is sure I got an attorney with the force, as chris was saying that the decision.

K

On what standards are going to apply is decided when we get to the record of decision, we start.

K

Looking at it in the ri phase, looking around to see what standards are out there and we start.

K

Talking to the regulators about it, but they aren't actually chosen to the rod. So it is.

K

Not a rad decision on whether it will be federal or state standards. It comes down to looking at.

K

What the law requires us to look at, which is, is it a promulgated standard if a state standard.

K

Is more stringent than a federal standard? uh That would probably be the one that's chosen if it's.

K

Relevant or applicable to the situation at hand and I'm not trying to be hope. A.

K

Lawyer, be these very detailed analyses that we have to do when we get to that state.

I

This is my deal I just again. I just confirmed what sharon was saying. You know that that is true. So.

I

You know part of the ri is what was important about. The ri is not only collecting the data.

I

But assessing it through uh the sort of formal risk assessment process so um once once you've.

I

Determined that you have a risk uh and again, if we're looking at groundwater and looking at.

I

Appropriate either risk-based or uh promulgated standards um once you've established, there's an.

I

Unacceptable risk and that's defined either by cancer, non non-carcinogenic risk uh thresholds.

I

Then you start to look at uh a a variety of what's available in terms of either federal and or state.

I

Criteria so um so yeah like sharon, said it. It doesn't really come into play until you get.

I

You've gotten to that threshold, but with that said, we're all working on the premise and all.

I

The data that's collected is basically assess against those more strict state standards, as we.

I

Go through the ri process, so I think that's what's most important that we're essentially looking at.

I

Those uh in addition to uh the other 25 or so that are being evaluated but, more importantly,.

I

And, most importantly, those which have standards so in making sure that the data quality objectives.

I

That the quality of that data can actually meet those standards. uh So when you're, basically.

I

Comparing a data point that it's at least as low as that particular standard that you have.

I

Identified preliminary preliminary identified as part of your sort of initial evaluation or.

I

Screening of alter um of a rouse that are out there, so um so that that's just sort of.

I

The it's a lot of circle. You use a circle jargon, but that's basically how the circle process works.

M

Well, I I can only speak for myself, but um if we get to the point where the lower standards are not.

M

Chosen, I would like to have the opportunity to argue uh later down the road about that.

E

I think definitely the reb will want to talk about that topic.

E

Further on and my last question, I feel like one of those guilty students in school that forgot.

M

A lesson here so I apologize, but um what is being done to protect the haven? Well,.

M

From all contamination now and in the future, since it still sits in the middle of the flight line,.

B

Well I'll, uh I can speak to that on uh what what the air force is doing right now,.

B

uh There is an extraction um system um uh and let me see if I can.

B

Pull this up hang on a second.

B

And I'm gonna have to turn some features on here.

A

And while he's pulling that up, chris is speaking again.

A

A lot of the any you know: future contamination is probably you know, there are businesses around the.

A

P's airport now so it's going to be a lot of that. A lot of that management is going to be up to the.

A

Airport and the businesses out that operate and have chemical operations in that area as well. So.

A

This at that point, any future contamination isn't only on the air force. That's in the past, the stuff.

A

That's ongoing now and in the future is around that. Well, as you know, other businesses, so it's.

A

They are going to have their own. You know pollution control mechanisms in place.

A

um Hopefully they don't, you know, hopefully we'll, never see anything added in the future. That's.

A

That's the plan kim I I'll. I can just add that um the the airport and.

F

uh Airport tenants are are very aware of the haven. Well, you know we, we have spill plans, we.

F

Have storm water plans, environmental protection plans and everyone who operates on the airfield.

F

um Is aware that the haven well is there and, and it needs to be protected, you know it's, it's not.

F

The way you'd build it today, but it is what we have um what we've taken over and you know, we've.

F

We've been dealing with it that way, and we'll continue to be very protective of it.

G

And something else, I'd like to remember is that we've got a very extensive long-term.

G

Monitoring plan for the entire airfield, that's with the haven, oil and the other supply wells at.

G

The monitoring well network up and down that we're looking at right now.

G

uh The wells that were chosen for uh periodic sampling are selected, they're called sentry wells.

G

So we're looking at travel times from groundwater as the growler moves towards each of the supply.

G

Welds, so that we're not surprised by a contaminant showing up in the supply well, we'll have years of.

G

Advance notice, if we see movement occurring towards anything so there's time to react.

G

So that that's how that plan was developed.

B

Okay, uh so can everybody see my screen? Okay, so uh so what we have in place besides.

B

All the uh all the monitoring well network, that.

B

That peter was uh referring to uh which we, you know we sample regularly and also the treatment.

B

System, that is on the haven, well, that that brian, um you know we had that tour. We went through that.

B

Virtual tour, uh so that's that's treating you know, point of use from from from the haven well,.

B

uh But there's also a series of extraction wells that basically go right across here, and so these.

B

This is capturing groundwater and you can see the red here, and this is capturing uh groundwater and.

B

You can see. Actually some of these contours are bending in so the groundwater is coming in.

B

Into this zone here and these these are capturing groundwater and that's being treated.

B

In a similar treatment plant to what the city is operating, uh but we have a it's, it's the airfare.

B

Mitigation system um ames plant and that's treating it and then it's.

B

Injecting the treated clean water- uh basically, I don't know it's somewhere in this area here, treat.

B

It there's a series of extra injection walls, it so now we're flushing clean water down through.

B

In this direction, uh so this gets captured it's all this. All this gets captured and gets pumped.

B

Out clean start a clean wave here we also have a well right about here, uh which is called the.

B

uh Inner mitigation well imw, uh and that is pumping uh water um and and uh and going back.

B

To the treatment plant, so that's helping uh basically create a kind of a a clean water.

B

Shadow on the downgrading side towards the haven well and and there's also a series of clean water.

B

Injection wells in this area here uh and that's also flushing out uh cleaning treated water uh and.

B

That's heading down towards um the harrison and smith wells uh further down. So that's uh that's!.

B

The that's what's happening right now and hank. My final question, um so, whatever you're using for.

M

Treatment um and what you're capturing is being permanently destroyed through an incineration or.

M

Whatever the chemical compounds, you're you're grabbing, require for permanent destruction.

B

uh Yes, thank you thank you kim. um We have mark then sam, then andrea, and I want to invite.

E

Any rab members who haven't spoken, we'd love to hear, what's on your mind and I'd love to get you.

E

And we have another 15 minutes or so in this kind of formal period, um and I also want to remind rab.

E

Members that the produce presentation, like you feel free to ask questions about that now is.

E

A good time so, let's go to mark and then sam yeah. I think this is also for hank.

L

Going back to the one of the first gis layers that you showed of the various layers of um material.

L

Under the surface, whether it be overburden or bedrock or a couple layers in between.

L

The first question is: does the entire area is it floored by bedrock solid, bedrock.

L

The wood so to speak, um uh that's the first question and then the second question is.

L

You showed at least in some areas, and I I didn't get the picture and I don't.

L

Have it up before me, um marine, silt and clay, which you said was relatively impervious to.

L

Groundwater and surface water penetration from the overburden, so depending on how widespread that is,.

L

How does it get down to the fractured bedrock if it has to go through the clay.

B

Okay, uh it's so I'm gonna! I'm gonna share my screen again and thank you good question. Yep.

B

I gotta, and hopefully people can see it here. We go okay, uh so the the first question is about.

B

I'm just gonna turn these um contours off. uh The first question is about the the bedrock and uh is.

B

It solid all over it, it's the the the you know, we haven't drilled everywhere and we have a lot.

B

Of a lot of holes that have gone into bedrock and and uh gone down deep into bedrock and some are.

B

Shallow into bedrock, and just from I mean not just the holes that we drilled the holes that have been.

B

Drilled since uh the the irp days, the instant installation restoration program uh when that.

B

When the invest sites would be investigated for fuels and solvents back in the late 80s, so we have.

B

Access to those borings as well, so our knowledge of of the subsurface is you know is, is pretty good.

B

um But the the fractured zone, the highly fractured zone, the broken blocks um is, is really generally.

B

And I'm gonna use the word generally limited to the top. You know 10 to 20 feet of bedrock.

B

And that's just from you know, a lot of it is isostatic rebound results. You know from when the.

G

Glacier was sitting on it and it receded, and then the ground started coming up again, because all the.

B

Weight of the glacier when that happened, the rock was brittle and it broke and it broke in in sheets.

B

uh And so that's why you end up a lot of times. Have this kind of really highly fractured zone.

B

Near the surface of most bedrock uh formations in new england, um so that's our conceptual site.

B

Model and for the most part it's it's, it's proven to be fairly accurate. uh You know, can you drill a.

B

Hole 20 feet into rock and not find any water yep, uh but in general it's you, you find water and it's.

B

In it's in it's in connection hydraulically in connection with the overlying overburden, um so.

B

Yes, fractured fractured rock well, it's all the deeper rock is fractured too, but at the frequency.

B

Of fracturing is much less yeah, so skinnier skinnier fractures and fewer of them. Fewer of.

B

Them right, and sometimes you have big ones but but uh but there's generally fewer of them. um So um so.

B

That's that's the first part of your question. The second part of your question is, I got a layer, I'm.

B

Going to show you somewhere, if I can get my table of contents, all squared away, let me close. This is.

B

Too busy here here it is there you go, that's the marine clay silt. So this is that.

B

Is the the orange the orange and the yellow all the yellow orange is the this hasn't been.

B

Updated with uh all the new stuff we found, but uh the this the orange uh there uh is.

B

What was mapped previously uh by um the usgs and the light orange for lack of better term.

B

Is what we mapped during the early stages of this investigation, so during the base.

B

Wide site investigation, and also during the site, 8 investigation, we found some additional.

B

Clays and we mapped them out- or this is this marine clay salt and which, subsequently, uh during.

B

This most recent round of ri investigation- we found more so this will get. This map will get.

B

Amended and and there'll be more zones of of marine clay silt. So what you're looking at then.

B

Is this? Is that kind of that middle layer? This is this: is the layer that's between.

B

The upper sand and the lower sand, so any any, where my hand is here any any any material on.

B

Top of this is going to be, is going to be upper sand and any material below it is lower sand.

B

And then you hit the bedrock, uh so uh you can see that there's a lot of kind of holes.

B

In the in the marine clay silt so in this this whole area here this this whole flight line area.

B

And I'll put the I'll put the contours on now. When I talk about this.

B

Now I got the contours on here this whole area, starting with the site- and this is a this- is the.

B

Recharge area for the whole kind of home base, but also you're having you're having water going off.

B

In two different directions, so this whole area, the flight line, is also a recharge area. uh So.

B

There's there's no there's. There is some clay because we did find some, but generally speaking,.

B

There's not a lot of clay in this area, so this is how it's in and when you have a recharge area.

B

Water, besides it moving perpendicular to these lines, it's it's moving in three dimensions.

B

So it's also moving downward uh or upward, depending on where it is in the whole flow field.

B

uh In in areas where it's in recharge, it tends to go downward goes vertically downward, as well as.

B

Whatever direction the contour is suggesting so for site, eight, for instance, up here, you're.

B

Going to have a you're going to have it's going to go from here out to out to the.

B

Bay- but it's also in cross section, I'm just going to draw this in cross section.

B

It's going to go, it's going to go down and it's going to come up and discharge into into.

B

The into the bay so because it because it's a recharge area, it's going to have a tendency.

B

To go down so the same thing is going to happen here along here. It's going to go, it's going to be.

B

Heading down and then it's going to start coming up at the bay. So that's how it gets into the rock.

L

Okay, but um so I think a follow-up is um so I picture these orange areas as.

L

Almost like impervious plates, so the water above it would not pass down below it, would.

L

Run across the surface and follow the contours that way, and likewise the water under it.

L

Is that correct, um it can be um in some areas it very the texture of this.

B

It's put this way in areas where it's thick enough to put a well screen. You wouldn't.

B

Want to put a well screen in it, because it's not going to it's not going to produce water.

B

uh Is there water in it? Yes, there's water in it, um you know it has. It has a it's a clay so.

B

It has high porosity, but it's it's it's not very interconnected. uh So it's not moving.

B

uh So in some areas it's denser so you might, you might have exactly what you suggest that.

B

You have it's it's completely impermeable in that section, but then you get a section where it's soft.

B

And kind of gooey uh and maybe siltier, and so you might get a little bit of transfer between the two.

B

Layers, but really not um so it acts as a in areas where uh you know where you have a lot of clay.

B

Or you know wrinkly silt, it acts as a almost a perched crown where the.

B

Water, on top, is actually that's what I'm getting it's a perch groundwater zone right.

B

Okay, I got it. Thank you. Thank you. um I want to make sure we have time for sam and then andrea.

G

Anna, um I did have a question about produce, but I also have a couple about sampling and hydrology. I.

G

Guess that would be a good follow-up to that, and so the first one is. um It looked like that there.

G

Were a limited number of sample sites done outside of the pda boundary, and I was wondering if there.

G

um And and what we did see inside of there seemed pretty um pretty much a mixed bag like a lot of.

G

Heterogeneity um so I'm wondering if if we did more sampling outside the boundary, we might.

G

Expect some surprises, um so I'm wondering if there's any intent or possibility of.

G

Of doing sampling a bit further away to see if there's um anything else, interesting going on.

B

uh Well, sam, um we.

B

We uh have sampled outside the boundary and uh and uh there's some additional wells that we've.

B

We've sampled uh that we haven't got data back yet so uh the whole intent of the the approach.

B

Of this remedial investigation work plan was uh starting off where we we left off from the.

B

uh Expanded site investigation and we kept moving outward or down gradient and and we stopped when.

B

We get clean so uh or when we get to a discharge area which would be the bays or the or the river.

B

So we are continuing to to move out and so uh the next phase of work from a groundwater perspective.

B

uh And we haven't scoped that out, yet that's that's! Coming up in the next.

B

Six weeks, or so uh is to is to look at um look at the the distribution of.

B

Of contamination uh and see and see you know where we have clean zones where they're still.

B

Kind of you know dirty zones uh and and uh and move out and and fill those data gaps. So that's.

B

The intent is to is to kind of keep moving out until we can get our arms around this. So we can.

B

Draw a line around the whole thing, so we can start establishing uh gmcs okay, makes sense, and I guess.

G

Yeah related to that is this study period going to be enough time to give us a good sense of the.

G

Mobility, the transport rate of these all these different compounds within the study area.

G

Or I mean obviously they're going to migrate eventually within the groundwater.

G

Groundwater, so, whether it's decades or what um are we going to be able to know that.

B

Well, that's that's part of the part of the ri is a is a fake transport section and uh we have a uh we.

B

Currently have a groundwater flow model, uh that's been calibrated and we've been using that along.

B

All along helping us pick points and where to where to ideally um put wells and so on. uh But.

B

We're we're building a uh contaminant uh transport uh model along with that and we're gonna look at.

B

The fate and transport of these contaminants, but I'd also like to point out, I showed you.

B

Some of the contour maps earlier, you know that this this use of a triple f of this.

B

Perfluorinated foam a triple f began in the in the mid 70s here uh so that's 45 years ago, and and.

B

And this is as far as it's gotten, so it's not it's not moving terribly fast.

E

Thank you, thank you and just remember so. The majority of the volume of 12 that was.

G

Sprayed was 70 74 somewhere in there, starting until base closure became imminent in the late.

G

80S, although there has been there was up until very very recently, some much smaller use by the.

G

Air guard and their training- you know the vast majority of the volume of a triple f that was.

G

Sprayed was in that 20-year span in the 70s and 80s. I also just want to throw out there, sam and.

G

Kate, since you are new- and in case this helps, you better understand the breadth of what we've looked.

G

At it's- that's not really presented here, but the group is familiar with is a very extensive.

G

Private drinking water, well inventory and monitoring program.

G

So it's not shown on the maps there's some some personal.

G

Privacy protections as part of that that program, but we did we air force, did a.

G

Study back in 2014 and started doing the inventory of the private wells and has been sampling continuously since then, so.

G

And that extends more than a mile from the base in just about every direction.

E

Thanks peter um sam, are you good, yeah, great um andrea, go actually pause for one sec, um members of.

E

The public, if any sort of last call for anyone who wants to make public comment and then we'll manage.

E

Time accordingly, if you would email linda, the um her email is in the chat, so email in the.

E

Next minute or two, if you'd like to make public comment, please andrea thanks! Thank you. um Yeah.

H

I just have like three more comments, questions, so one is on incineration. I know that we talked about.

H

This at our last meeting- um and it got brought up again today, so we know in the ndaa that passed in.

H

December there was a requirement for a temporary moratorium on the incineration of pfas substances.

H

Increased transparency surrounding incineration practices and a closure of a loophole.

H

That may have allowed the dod to improperly dispose of p-fascilating substances by blending.

H

It with other fuels, and so I'd really like to know what is the air force and the city.

H

Of portsmouth's plan uh in terms of what you're going to do with the pfest that you're filtering.

H

Out, if incineration, if there is a moratorium on it, and you can't incinerate it because I do.

H

Want to say that you know incineration, there's a lot of concerns with that too. In terms of.

H

You know what what happens to the people heat them up, that high do they become more airborne and then.

H

Just go to kind of recontaminate another community, um so I think there's a lot of concerns around.

H

Incineration, and so given that that's in the most recent ndaa, is there a plan like if you can't.

H

Incinerate the pfas that you're, you know gathering at peace. What are you going to do with it.

A

Yeah I'll take that andrea, so, right now um the plan is, is once the moratorium is in place. That.

A

It's going to have to go to a class c hazardous waste landfill and that's that's. How we'll be.

A

Treated until um the epa comes out with a final rule on what what is an acceptable form of.

A

Destruction for peace pass specifically, so once the moratorium hits there will be no destruction.

A

Via the consideration, it's only going to hazardous waste landfills that are permitted.

A

To accept such pfas contaminated wastes, so a complete encapsulation, I assume, is how they would.

A

Dispose of that until you know you find out what the epa is on, you know authorizes as far as.

A

Destruction otherwise, but that's the plan. It is a class c landfill lined. Yes,.

A

It's the pretty high protection hazardous waste landfill. Yes,.

K

Okay and just to clarify a statement I made earlier.

B

In previously, we we had incinerated the waste and now we're landfilling it so.

H

Okay, um my other question um is around state. I have a question about state standards and then.

H

A question about produce so going back to the state standards chris you had mentioned. You know.

H

um Some a recent document that came out from dod in 2021, um another pfas community colleague.

H

Of mine shared an air force document from 2020 written by john henderson, um who, I think folks.

H

On our rap may recall, we actually met with him a couple times. uh He came out and met with us.

H

But it said right in there that d, that the air force would comply with state standards.

H

And so I'm just curious, like I, I feel like it's a bit vague. Is the air force going to.

H

Comply with state standards in new hampshire, with these private wells, like I don't I'm just.

H

Not it's just not really clear, um and I just didn't know if you could just give us like.

H

A straight yes, or no we're going to go ahead and intervene in those five private wells that we know.

H

Are above new hampshire's mcl's, but below the epa health advisory.

A

Well, andrea right now, I'm waiting for the air force implementation guidance to come out.

A

There are some conditions in there. um Illegal can correct me if I'm wrong so far. That's it. You know.

A

Around p, around p's the we know that the the lhas from the epa have been exceeded in the.

A

Area underneath the current ongoing circle event, so those can and should be considered.

A

um I'm waiting for the guidance to give you the definitive answer, but.

A

It's um it's a step in the right direction. I guess is the answer that you kind of want to.

A

Hear so it's um yeah well, this is this, is sharon again and the people think the new policy means.

K

That we're immediately gonna that the air force is immediately gonna start treating every well.

K

That exceeds a state standard, and that is not what the policy said. The policy said if there are wells.

K

That exceed the lhas and if there are other wells around there that are hydrogeologically connected.

K

To the wells exceeding the lhas and the air force or any other osd department has a reason.

K

To believe that, eventually those wells would exceed the lhas, then we can address those wells.

K

Too, and when we do address them were allowed not required, but allowed to use state promulgated.

K

Standards such as an mcl for the level we would clean up to, but it's not you don't look to see.

K

Does a well exceed the state standard and that triggers you providing the water. You still look to.

K

Is there a well exceeding the lha? Are there other wells, hydro geologically connected to that? Well,.

K

And do we expect the wells that are hydro geologically connected to eventually exceed.

K

The lha, as chris said we are waiting for implementation guidance for that policy.

E

Can you say what the lha is again and the mcl for people who are not, as used to the acronyms.

K

Lifetime health advisory is the lha and that's 70 parts per trillion. It's epa's.

K

Lifetime health, advisory for pfoa and there's one for pfas or you can add them together.

K

The mcl is a maximum contaminant level, which is a safe drinking water act level that states set for.

K

Some contaminants and I believe new hampshire has four thank you. I don't have my cheat sheet out, but.

K

I think new hampshire has four yeah, so sharon. I have a follow-up question to that, because.

H

um So it's my understanding and you know folks on the call correct me if I'm wrong, but you know.

H

There are wells that were above the lha that the air force did intervene on, and that was before new.

H

Hampshire set mcls so then, when new hampshire set, the mcls the air force refused to comply, and so.

H

I I don't know if that matters in terms of the timing, because you're saying, if there's wells that.

H

Are above the lha and if they're hydro, geologically connected to other wells like.

H

What do we do that? You know the air force intervened on some wells before we had mcl so.

H

Now we have the mcls and they're not intervening, but now there's this new guidance and it's like.

H

It doesn't sound clear to me if the air force is going to intervene or not so like chris's slide.

H

Said this is a big win for the community, so I kind of like walk away going. Okay, awesome, the air force.

H

Is going to intervene in those five homes, but I feel like we're still hearing like we're, not sure.

H

That the air force is going to intervene in those five homes, so I'm trying to find the big win.

H

On the slide, I'm trying to understand that. Well, I don't think the slide should have set a big.

K

Win because we don't know yet what the facts are going to be at peas or at other installations or.

K

Former installations before this policy even came out as, as you know, the air force position was.

K

If there was an exceedance of the lhas, the lifetime health, advisories, the air force or other.

K

Agencies within department of defense, if if they were to control, that area, took action to provide.

K

Alternate water and those are the wells as you've indicated that for quite a while, we've been for.

K

Providing alternate water and, of course, there was the epa administrative order that compelled.

K

Stuff to happen with haven, all the new policy is saying it doesn't say you go straight to mcl's.

K

And by golly that's what we're running with it's set. It's that whole bit. I talked about before.

K

The new policy is only really controlling. Can we address wells that are below the lha or lhas.

K

The lifetime health advisories and when can we do that and there's a.

K

Process that there's an analysis that has to be gone through for that.

K

There's a difference, there's a difference used for what the lhas are for.

K

Than what mcls tend to be for lhas are there? There was a decision made.

K

That, if a well exceeded the lhas, we were going to consider that, to present an imminent substantial.

K

Danger to the people drinking the water and we were going to provide alternate water.

K

Mcls are longer term and mcls, like we talked about earlier with the cleanup standards that.

K

Are going to get used at the rod? That is something you look at for what is the cleanup going to be.

K

Long term not is there an imminent risk now, because an exceedance of an mcl doesn't present.

K

An imminent risk now it's: what does it need to be for the cleanup later on what the new.

K

Policy is telling us is, if you have one well that exceeds the lha there's other wells. That.

K

Are connected to it hydrogeologically and if eventually, those wells would exceed the lha.

K

When you go looking for a standard to clean those wells up to, we are now allowed to use the mcl.

K

But we don't go looking for wells that exceed the mcl and say we're going to clean those up.

K

Okay, so it sounds like the air force is not going to intervene. I mean, I don't know the levels.

H

In those other five wells, um but yeah with you explaining it that way, it just doesn't seem like.

H

The air force is gonna, then intervene on those homes. You know, and the other thing I think I don't.

H

You said that doesn't quite make sense to me. Is that, like it I mean an mcl is in my understanding.

H

Is more enforceable than an lha? You know like an advisory versus a standard. I always thought an mcl.

H

Was more um enforceable but apparently it's not enforceable to dod, which I don't quite understand.

H

That but well again, let's go back to your first. Let's go back to your first question.

K

And which I've already lost? I'm sorry, oh on the five wells. I do not know of a decision.

K

That's been made there because, as chris said, we're waiting for implementation, guidance.

K

To help us take this policy and make sure we implement it correctly, so once they get that.

K

Guidance they'll be doing the analysis and I don't know if anybody's already done a back of.

K

The envelope calculation for those five wells or not, the second thing is keep in mind an mcl.

K

Maximum contaminant level is a safe drinking water rack standard that applies at the tap.

K

Which means that's, the water coming out of the tap is supposed to meet that mcl. We're talking.

K

About water in the ground, or maybe that's coming out of a private drinking water, well.

K

Which is not required to meet state mcls mcls, don't apply to private wells.

K

So they're used in a different way. They are often used when we get to actually cleaning up.

K

A groundwater source but they're used, they have a different function than lifetime health, advisories.

K

Does that help? um I I appreciate the answers, but no I'm still confused and I think in the.

H

Interest of time, I'll, just move on and ask my other questions I feel like this is something.

H

We need to revisit, um I mean I'd, love to know from new hampshire des if the mcls don't apply.

H

To the drinking you know to the private drinking water wells uh where they've had to intervene and.

H

Provide alternative water because they don't feel that level is safe, but yeah, I'm just I'm.

H

I'm still a bit confused, but why don't we go ahead and move on in the interest of time? I just.

H

This is something we're going to have to continue to revisit um so my question for amy.

H

I just wanted to go back and ask more about detection limits uh for the for the fruits and.

H

Vegetables, so I found it really interesting that there were no pfas detected and I was just curious.

H

If you can tell us what the detection limits are, uh were they and were they in parts per billion or.

H

Parts per trillion sure yep um and it's a that's a great question. So the very short answer on that.

C

Is that they were appropriate um and and that they were the lowest that the lab could achieve.

C

So I'll just give you a slightly longer answer on it, and that is the process that we go through.

C

To set those, so we start by establishing um these risk-based criteria. So what would be.

C

A safe amount of consumption for vegetables and then we do the 10 of that right. So we set.

C

What is basically a negligible risk value, so it's basically the same process that you saw with like.

C

Shellfish consumption and the other media that we've been looking at so we went through that.

C

Process with the produce- and we talked to the lab before we went out in the field and we established.

C

That they could meet the detection limits that we needed, so basically they could detect pfas.

C

At a limit that was equivalent to or below our screening levels, so we went through that process.

C

And then, when we got the data back from the lab, we checked it to see, you know, did they meet what they.

C

Said they would beat and it turned out that they weren't quite as low as we would have liked them.

C

To be, they didn't quite achieve it, so you know we went back to the lab and we said you know, could.

C

Is there any reason you know why didn't you achieve quite the detection limit, essentially what.

C

They achieved was was equivalent to our screening levels, but we thought that they would be lower.

C

So they're still appropriate and they're they're fine. We're absolutely sure that we didn't miss.

C

Any risk drivers, you know, there's there's, I don't think there's you know, there's nothing hiding in.

C

There that would be a potential risk driver, um but we did see if we could get any lower limits.

C

And they, basically, they found that you know with this solid media, this biota there was a lot of.

C

Interference- and they had some technical issues running the data um we just can't get lower limits.

C

With a solid media that is kind of matches up with what you're able to see in the liquid media.

C

So when you think of groundwater, you can get detection limits in the single nanograms, whereas.

C

In the produce, the detection limits were, they were one microgram per kilogram, so parts per billion.

C

So they are, you know, they're a little higher than what we're seeing in the in the liquid.

C

Media, so I guess what that translates to is. Is it possible there's pfas in the vegetables and fruit.

H

But the lab was not able to detect it. There's never going to be a zero, so.

C

We can never say that there's never nothing there right like it, never gets down to zero.

C

um There's always a possibility that there is something there, that's below our detection limits.

C

What we can say is that, whatever that is it's not a risk to human health.

H

Okay; um okay! Well, that that's interesting to know um in terms of the pasture grass, you were.

H

Able to detect some pfas in the pasture grass, and I'm just curious, why you think there may be.

H

A difference in pasture grass versus fruits and vegetables. Like I don't know I I know nothing.

H

About plants, so I like is it in terms of how they grow or where they were growing, or do you have any.

H

Thoughts as to why one group was non-detect, but the pasture grass did have some detectable levels.

C

Yeah, so I think I mentioned in the presentation that we've been doing a bit of research into.

C

The different uptake factors um and the different literature that's up there um as far as so plants.

C

They don't necessarily um take pfas and put it into their different types of tissues. The same.

C

Way in the same efficiency, if that makes sense, so something that's a fruit. It's a different part of.

C

The plant and the plant is going to potentially put pfas more or less there than say a leaf.

C

So when we look at the different transfer factors that are available for plants.

C

um It typically suggests that leaves are the most likely to take up pfox, so so that would.

C

Be like a grass, it's a leaf right. It's it's! A green part of the plant. um If you looked at.

C

You know leaves of trees. You would see a similar, uh similar kind of correlation so leaves.

C

Leafy green vegetables that we eat again, like that's more likely to take out pipas than for.

C

Example, a fruit, so a lot of what we sampled. um There were fruiting parts of vegetables, so.

C

A pumpkin or a tomato, a cucumber, that's all like a fruiting part of a vegetable.

C

Which again is different than roots, so we only had, I think, one or two onions. You know that was the.

C

Only root vegetable that we sampled, but again it's a different plant part. um So when we looked into.

C

This we tried to you, know maximize the amount of leafy green vegetables and green things like the.

C

Pasture grass, that we were sampling, thinking that that was our sort of our most likely detection.

C

So you know we didn't see it in any of the produce, um but we did see it in those those.

C

Pasture grass- and you know the the concentrations that we saw that were taken up into pasture grass.

C

They were in that estimated range, so there's the the like the lowest that the lab can see.

C

Is below the reported detection limit, it's actually a lower value than that.

C

um And it's a level at which it's just not a very confident value like they can't say: okay, well, they.

C

Know it's there, but is it 0.6 or 0.8? You know they don't have a high level of confidence of what the.

C

Actual value is which why it gets is why it gets j flag. So it's quote unquote an estimated value.

C

um And so the ones that the lab did detect, they were all estimated. They were low concentrations.

C

um But uh so it was just as I said, it was just those two chemicals pfva.

C

And then that another one was like pfbea and you know it was only in those two samples which.

C

Were one was a dry soil and one was a hydroxyl. um I think brian was asking about correlations.

C

Earlier I wasn't entirely following him, but the part of the reason we haven't done correlations.

C

Is because there were so few detections um and when we look at what was detected.

C

We don't always have the co-located media, so in that dry sample we didn't take a dry soil sample.

C

There so so there's no way to look at what was in the dr and in the dry soil. You wouldn't have.

C

Really had a groundwater sample either so there's nothing to correlate with that detection of pfda.

C

um We don't we don't really know why that's there um and then in the hydric soil samples. You know.

C

We did, we saw one chemical at a very low j flag value um and again it wasn't. It wasn't in the.

C

Soil sample that was associated with that, so the only thing you know that that makes sense.

C

Unless it was, you know it was in soil, but it was below the detection limit. I don't know, but.

C

um You know, based on the on the uptake factors that we see they tend to be higher either for.

C

Leafy green, but also from groundwater, so you can look at uptake from soil only or from groundwater.

C

Only right, I'm gonna, I'm gonna jump in and ask amy. Can you wrap up? I want to get a couple more.

E

Comments in in a moment, sorry, I think that was the main end point I was gonna say it was just that.

C

The the groundwater you know tends to take up more, um be more efficient for so if a plant is taking.

C

Up fifa's, it's likely to be more efficient from groundwater than from soil. So I guess what one you.

C

Know one possibility is that uh it was a very wet summer and uh you know, even at the best of times.

C

When you're watering vegetables, it's intermittent they're, not 100 in that water, it's not not like a.

C

Hydroponic kind of environment, where you're constantly exposed to the water like we saw.

C

With that, you know the plant that was in the sediment that was in perennial water, so.

E

Got it? Thank you, um let's just jump in real quick. If I can't there's something else, hang on time, one.

E

Sec, sorry peter, I just want to say for the members of the public. We received one set of questions. We.

E

Think they've mostly been answered, but I'll just name them, probably in about 10 minutes, so other.

E

Members of the public don't want to speak so we're just going to let this conversation go a little.

E

Longer and make sure that we get also to kim and mike donahue but go ahead peter and then.

E

We'll go with him yeah, just something to remember and amy. If I'm wrong, but of all.

G

The backyard gardens that were identified- none of these are in high, none of them are being.

G

Irrigated or in contact with high surface water or groundwater contamination, so we're we're not.

G

Looking at gardens that are being grown up at site aid or or what have you so we've got very, very low.

G

uh Water concentrations to begin with, and it's not a huge surprise that we're not seeing it that's a.

G

Good thing, but yeah the soil concentrations that are sorry the shallow groundwater.

C

Concentrations that were associated with the pasture grass are higher than the irrigation.

C

Water concentration, so that's a good point, peter thanks and just to circle back around to the to.

G

We're not going to solve it tonight, but to the private wells. Let's just remember that they.

G

Their ds did step in uh nobody's drinking contaminated water uh in those wells in question.

G

You know there's, uh I can't remember the numbers off the top of my head, but we've connected at.

G

Least, one to municipal supply line, we've provided point of entry treatment systems. We've got um one.

G

Person still on bottled water, if I remember somebody else, did their own treatment system.

G

So in the short term, no one is drinking contaminated water and I'm sure that as.

G

This process unfolds hopefully expeditiously on the air force side that this investigation very.

G

Clearly will establish that these wells, that have impacts are hydrogeologically connected.

G

To the source areas on peas, and it will be a no-brainer for the air force to step in.

I

Yeah this is mike, and also too you know again uh as hank. It sort of really gave a good sort of.

I

Conceptual model of both the porous medium groundwater, transport- and you know these.

I

Wells typically, you know residential walls are typically sort of screened in brock, so.

I

Bait and transport, as we sort of use models and and packages that support the flow model.

I

Is much different and much more complex with the bedrock? Well, so that's why um there's a greater.

I

Amount of uncertainty associated with a bedrock well versus something that you could maybe more.

I

uh Confidently sort of uh sort of predict as far as sort of concentration as it migrates.

I

Away from the site that which is above the 70s, so I think that's another sort of important.

I

Element to the sort of the consideration of these wells is the fact that they're bedrock.

I

Wells, so this is a greater sort of um bar of uncertainty around those wells and that's why.

I

You know again that you don't want to play with uncertainty. It's it's not in.

I

Anybody's best interest to play with uncertainty relative to somebody's drinking water quality, so.

I

Absolutely so, let's go to I'm going to ask kim to share her commenter question and then mike michael.

E

Donahue before anybody responds because I'm there may not actually be much time to respond, so I.

E

Just at least want you to get out your pieces and we'll see what we can do so kim and then.

M

I'm turning my question into just a comment uh because of the time limitation, but I also am not.

M

Very satisfied with the answers legal answers from sharon: no disrespect to you sharon, but.

M

I I would like to see our next meeting really get a deep dive into this. I think the the pre-recorded.

M

Information that the air force would present on this issue might be helpful, because I I think.

M

It all, I also think it needs to be revisited because it's just dissatisfactory at this point.

E

Thank you kim, michael uh amy. Can um you put your slide back up that showed.

F

How you, how you originally identified the areas to look at for uh both the gardens and the uh farms.

C

uh I can it will take me a second to find it hang on the reason I'm asking that is that.

F

I think there are significant areas in newington where there are gardens that have.

F

High water table surface water people, don't even they don't even need to water, their garden.

F

So uh it I in looking at the slide prior to the meeting I.

F

I was wondering why the these particular areas got selected, and I know you explained it.

F

At the start of your presentation, but I again, if, uh if you don't look at surface water.

F

Contact with growing media or with growing areas, I don't think you're going to.

F

You're going to fully answer the questions that people have and, and in fact the data that you do.

F

Have from the one area where there is constant water shows that there is.

F

More uh pfas there, so, if, if you can put it up, it seemed to be kind of limited, it wasn't.

F

I know it was based, as I recall you explained, it was based on some uh earlier.

F

Screening that you had done that uh from input you would receive, but.

E

Let's see amy can we do like two minutes on this of like how you chose what you chose.

E

And then michael and other rap members, maybe we can continue the conversation.

E

Sure email looking at that slide or something yeah. I have the hydric soil map. If that's helpful,.

C

um If you, if you want to yeah for some reason, zoom isn't letting me share, even though I have the.

C

Powerpoint slides open, but um so I so the shallow groundwater is definitely an interesting one, but.

C

It's um so we didn't look at whether or not gardens are necessarily in a shallow groundwater.

C

Area because those areas wouldn't be conducive to gardening, they're, they're kind of areas that.

C

Flood out seasonally, so it's they're not typically places where one would actually put a garden.

C

Typically, we did when we sent this survey out. We did ask if people were using surface water.

C

To garden or had flooding issues, um assuming that, if, if they're in kind of a hydric soil area um or.

C

For drain soil- and um you know, they're having this like their gardens- are getting inundated.

C

Regularly then, we would pick them up with this questionnaire um and we did send questionnaires.

C

To this entire area um of newington, so I I would think that if you know there were people who were.

C

Impacted as you, you know, as you just pointed out, that they hopefully would have contacted us, but.

C

If there are people who are impacted in this way, I would encourage them to fill out questionnaire.

C

B- which is still on the brac website, um because we would love to hear from them.

F

um Without without putting up that slide it it's delaying everybody so.

F

This slide, this slide doesn't explain this at all. Let's, let's pick this up. Let's pick.

E

This up between rap meetings. Thank you mike sorry, amy, um just because it's late.

E

um So we'll we'll carry that conversation on and figure out what's going on there. Thank you.

E

So we had sorry I feel like that was very abrupt thanks for letting me, let me do that. um Thank you.

E

Everyone for that really in-depth conversation. um I think we picked up a bunch of different.

E

Threads um and we got only- we got one member of the public who asked some questions that we.

E

Believe were answered about sort of whether the um whether the dod guy, how the guidance gets applied.

E

And when and kind of who sets things so in that back and forth um right, the only thing I have to.

A

Add is that we hope the implementation guidance comes soon. I don't have a date. So, okay, please be.

F

Patient yep, thank you chris um I'm gonna name some themes I heard tonight just in case that's useful.

E

And then go through some next steps that I know are on the books here and then I'm.

E

Going to give all the red members a chance to share final things on your mind as we wrap up.

E

So some themes that I heard and we were taking, notes and we'll put out a summary.

E

Where everybody trying to really understand and get your minds around.

E

What was found in all of this data collection? Where is the contamination? How is it moving.

E

Right through through what, at what rate volumes things like that? Where and how.

E

Is is the contaminated, the sort of contaminants that are removed, where are they disposed of, and.

E

How is that kind of going? What do we need to know? um People mentioned several times concerns.

E

About places being protected now right, nobody wanting further contamination and then finally,.

E

Last and definitely not least, a desire to really have more conversation around how the standards.

E

Will be chosen for the record of decisions so that people can understand that and if at all possible.

E

Help shape it or inform it, um and in whatever way they can so that was a big request. um Next steps.

E

We are going to write a meeting summary. We will revise the action items spreadsheet, which some.

E

Of you will have noted were circulating again after meetings to just track.

E

um Those we are actually um cameron when you have a second. Can you put the evaluation link into the.

E

Chat for everybody. We have a just four or five question evaluation. We love everybody to take.

E

Like two minutes to, let us know your thoughts on the meeting tonight, because the co-chairs.

E

Really take into account what we hear back and we're trying to shape this, so it works.

E

We are going to export this recording to get it posted, so anyone can watch it as we do with all.

E

Our meetings, even our in-person meetings, we record so that people who can't be here, can stay caught.

E

Up, um we will update our contact list for it with our new members and get that out to rab members. So.

E

You can contact each other, um we'll get the table from hank, showing the numerical levels of the pfas.

E

Out to the committee, so that you all can look at that um and we'll follow up with mike.

E

Donahue and amy about the garden question: that's what I've got. There may be more when we go through.

E

The next brought to our notes, but that's a good starting place. I think, and let me see what I'm.

E

Forgetting in our annotated agenda before I, while you're looking that up, I just want to.

A

Let everybody know that we are now looking for um volunteers if anybody's doing any any maple.

A

Syrup that's happening, so we we're going to send out some questionnaires and if anybody does any of.

A

Their own tapping or know somebody or a neighbor that does um we're going to send an email where we.

A

Have a new questionnaire we're trying to identify people in properties that do this? If it's a common.

A

Practice in the area and whether or not it's worth sampling, if they're in a contaminated area and.

A

Just to see what uptake is like for maple syrup in the area, so pay attention for an email, we're.

A

Hoping to get that out sometime soon and probably just the rare members of rap can spread it.

A

The community can spread it out via that you know via email or facebook, whatever you guys do.

A

That would be great and then we can work on that. Getting that done perfect. Our next meeting um is.

E

Going to be april, 12th we're going to figure out kind of what format that is in it's also going to.

E

Be sharing more data and I don't have sure, had a list of what it is. Somebody remind me sedum.

E

Sediment soils cinnamon surface water, eggs and um yeah. We have to have a little internal debate.

A

I think it's going to be a little less intense than this one. uh Groundwater is a fast, fast topic.

A

For peas and the other things are it's a little easier to grasp so.

A

Two more, they had to come and shellfish. Yes, fish and shellfish right and.

E

Let's do um um closing thoughts so rab members. I will um call on you and invite you to share.

E

Anything on your mind, as we wrap up tonight can be just a quick thanks can be questions.

E

Responses really- um and I think I'm just gonna- go more or less alphabetically by the last name.

E

My list is not perfect, but um let's go to the two mics so mike daly and then mike donahue.

E

Final thoughts, um I thought this was a good ravine. I hope everybody thought it was good.

I

It seems as though the the recordation of the the presentations were uh appreciated so.

I

That's good, um I don't know if you've what's sort of amazing about this particular study is just the.

I

Immense number of data points that are being collected, so this is building on already a pretty.

I

Significant massive database that existed that uh before woods, involvement on the pfas program so.

I

You know probably one of the most studied areas in the state of new hampshire, um so that continues to.

I

Grow- and uh you know you can see by just again thank god for gps gis to try to manage all this.

I

Data and again it's data building data building on other data points, so there's a lot to sort.

I

Of consider um for me, and probably I can probably speak for des to say that there's a lot of data to.

I

Sort of sift through and to try to understand so uh like like yourselves, it doesn't happen.

I

Overnight, it's you know it's not through osmosis it does. It takes a fair amount of time to study.

I

And, and to sort of put it all together in in our heads to try to figure out next steps. So I just.

I

Want to give everybody that sort of perspective, as you know, as we can continue to move forward.

I

I mean there's still more data to be collected. It all has to be put into this larger big story that.

I

We're trying to tell relative to nature extent and what it means as far as future, future steps being.

I

You know remedy, that's really where we're heading so um so anyway, that's just my little.

I

Bit of perspective, um so thank you tonight for everybody's participation with questions.

E

Thank you michael and then brian. uh I I just want to thank uh the air force for embracing the.

F

uh Different way of presenting this and um doing it uh in in advance, and I think that.

F

If you compare this with what the session we had last august, it's it's a night and day improvement.

F

uh So, uh thank you for the future. I I I really picking up on what mike taylor just said.

F

um I I think this data would be a lot more absorbable if um you built on what you've done.

F

But you presented it in three different um lenses. One would be for the base proper.

F

Base itself within the installation, the second one would be for the.

F

North knowington peninsula and the third one would would be for south newington.

F

And running into greenland, because when we we, when we look at these things, um we the the information.

F

We has been shown to us to be wonderful, really that you have that that you've gathered, but.

F

um Oftentimes the screen doesn't show in the detail the areas where people are actually living.

F

And that is uh something that, uh given that it's clearly off the installation at this point, we're.

F

In the off the installation era, it would be very helpful if there were more more of a focus on.

F

Being able to understand the data as it relates to where people are living, thank you.

E

um Brian and then joan.

J

Well, I I would only add I was like piggyback on what what mike just said. um I mean some of some of.

J

The monitoring wells we've got eight years worth of data, so it'd be kind of interesting to see.

J

Changes over time I mean it's still ever since day. One to me it's still.

J

I I don't fully comprehend that you know you can have a very high contaminated well and.

J

You know 100 feet away, you've got another one, that's not and then has that changed over.

J

You know the years because you know I I I said way back when it's like well.

J

Then, let's just grab these really contaminated wells and get the contamination out there. So.

J

I think concentration is over time, I mean we, we know it at our all. The drinking water wells.

J

Because we have hundreds of data points over eight years, so we know how the trends are going.

J

But it'd be very interesting on some of these um other monitoring wells to see trends over time.

E

Thank you um joan and then chris wait. I want to hold you chris to the joan and then.

E

Mark, okay, thanks anna! um Yes, I, like the new format better, and I also like mike's.

F

Suggestion of presenting it in sort of the progress of the three different areas.

F

That's my comment. Thank you um mark and then kim yeah I'll endorse the.

L

The format it gave me time to review uh and think about um what was being presented.

L

And asked um quasi intelligent questions, and um particularly with the next meeting.

L

You know my hunt is aquatic ecology, shellfish, fish, water, sediment, um I'd like to have a look.

L

At that data as much in advance as I can so I can get my act together. Thank you kim and then peter.

M

Well, we talked about a lot um and the back and forth can be very technical at times, but the goal.

M

Really isn't very technical, it's pretty simple and I hope we're on the same page about it. But this.

M

Is the restoration advisory board? It's not about providing clean water to households? I mean in the.

M

Interim it is, but the goal is the restoration of the aquifer, as I understood it, when I first signed.

M

Up and I think that if we all have that same goal, we don't have to get lost in the details.

M

Of how much the air force is willing to do and how much they are not willing to do and we're.

M

An advisory board, so um I do hope that people who are making decisions accept our advice on. What's.

M

Best for our community, not just for now, but for future generations. That's my comment. Thank you.

E

Peter and then gene hi, I appreciate everyone's uh input and concerns and it's hard to build on.

G

Anything else that or offer anything that hasn't been said already, but.

G

Anyone that ever has questions feel free to reach out. I'm always here and welcome to the three new.

G

Rad members, thank you. I realize gene looks like stepped away um maria and then um bill.

F

Yeah, you know a couple uh comments came up tonight.

F

Kim is right, we talked about a lot of things, but there were some questions about.

F

Operations appeasing at the airport- and I guess I want to just take the opportunity to reiterate.

F

um That we're you know we're we're very aware of the environmental impact of the haven, well-being.

F

Out there we do inspections, we do trainings um projects, development projects, don't start until.

F

We've had pre-construction meetings with the contractors and the developers. um You know we.

F

We have meeting with with our airport, tenants and our employees, so it is at the forefront of.

F

Our minds- and I just wanted to um just repeat that: that's it thank you bill and then russell.

F

Hi, uh so it was uh interesting for me coming on uh in my first first meeting, there was an.

F

Awful lot here uh an awful lot to digest, but I guess the the thing for me was um being able.

F

To look at the historical um you know, sort of uh mission statement and the purpose of the rab and.

F

What had gone on previously, I was provided with a lot of you know, reading material to get caught.

F

Up to speed with so certainly the format helped somebody new like myself to be able to come up to.

F

Speed and then to see how the meeting um you know took that uh sort of that the goal of the rabb.

F

And and and then how it worked where the rubber hit the road here was, uh was certainly helpful for.

F

Me to understand and to to play an active role in uh in future meetings, right russell and then sam.

F

I really enjoyed listening to all the different arguments.

F

um Going to what brian had mentioned a little while ago, I'm very interested to see on site eight.

F

For instance, the amount of water that has been removed and the amount of contaminants removed.

F

To see if there's been a change in the concentrations over the eight years, I mean.

F

There should be real results there that we can actually measure and look at um also interested in.

F

Essentially, how that the whole lar is being looked at because of my understanding is this particular.

F

Chemical group has not really been assigned true talks data, it's really kind of a supposition on.

F

Cancer causing what type of cancer is being caused and things of that nature, so I'm wondering how.

F

The air force, for instance, is going to be able to say.

F

All right, these concentrations are the like a lethal dose or something of that nature. Where.

F

We don't have scientific studies that are backing it up, so that that's kind of where I'm coming from.

F

Right now, um I thought all of the analysis was absolutely spectacular. What the what has been.

F

Doing in terms of the the wells and the different ground layers uh very fascinating appreciate it.

E

Thank you sam and then matt looks like we only got a minute but um yeah. I enjoyed the meeting a lot.

G

Learned a lot, I look forward to doing an on-site visit. Some of these places.

G

When time allows- and um I also uh echo what andrea said uh earlier- we love to get access to.

G

As much data as possible on all 25 compounds that were tested for etc because um as russell just.

G

Said this is an emergent merging area of science and people are not even we're not even sure what.

G

The toxicity or effects of all these compounds are yet and at some point it may be important. So.

G

You know look for the next one, thank you matt and then andrea, yeah hi. This is matt.

F

I think it was a good meeting. There was a lot brought up. I've.

F

Participated in the last probably two years of meetings- and I think this was a good format.

F

As a lot of people have mentioned, there's a lot of data out there and everyone's looking for.

F

Kind of uh more of a presentation of that data- and I think, maybe more of a timeline of when the.

F

Draft ri uh report might come out, maybe if the rap could see it as a pre-draft or what that timeline.

F

Looks like might be helpful, so uh that's that's my comment and have a good night thanks, matt, andrea.

H

Yeah thanks um yep. I just want to also say welcome to the new members. I really appreciate you.

H

Stepping up to serve on the rab, we need everyone's perspective as we tackle this big issue. So thank.

H

You very much for that. uh Thank you to air force and wood for the new format. I mean it.

H

Was I think much better and um the color-coded maps were great like it really was very helpful.

H

um But the levels tank that you did share with us were concerning. Some of them are really really.

H

High and I think our rab needs some time to digest that and better understand what that means, and.

H

um You know how is there treatment that's in place, helping with those really high levels and.

H

Wanting to better understand that, and and also like you know, we've never been able to get a.

H

Straight answer, but predicting like how long the treatment's gonna take, um I don't think.

H

Anyone knows that, but just seeing how high these levels are, it'd be helpful to know have.

H

They have those drops significantly. Are they moving at all? You know like having a better.

H

Understanding of that would be really helpful um and then lastly, I just want to say you know.

H

The the discussions around the state guidelines- this has certainly been uh important issue for.

H

The rab for the last couple years we've sent letters, we've talked about it in many meetings.

H

And the fact that we still just don't, have clear answers and you know we have a slide saying a.

H

Huge win and then we have a legal person saying that's not true, like that's really frustrating.

H

And I just think that our rap deserves better, like I think we need more clear answers from dod.

H

And the air force about what they're going to do to tackle those wells that they are.

H

Responsible for the contamination they did contaminate them. They don't question that.

H

I guess the question: is they don't want to follow new hampshire state laws, which is unacceptable so.

H

I hope that we can continue those discussions with clear answers um and that we're not being told two.

H

Different things in the same meeting, because that really doesn't um help with trust or transparency.

H

um So with that, I just want to say thank you for um for the meeting tonight. Thank you for.

H

All the information, I really look forward to the april meeting. I think splitting it up into two.

H

Meetings is going to be helpful for people to try to digest all this information thanks, andrea chris.

A

All right: well, I just um I'm I'm glad to hear that people were excited about this. This format.

A

I just want to say to those who were involved in this video amy hank in particular the amount.

A

Of work on that was pretty staggering and uh what team in general there's a lot of people in behind.

A

The scenes that none of y'all ever get to see, but uh thank you particularly to them, for putting this.

A

Together and for honor for you for facilitating this whole thing, so this this turned out to be.

A

A really good meeting, I know we, we talked about a lot there's a lot in the works. Obviously the next.

A

Phase of the of the ri is as ongoing and it's gonna start heating up as the weather, warms and.

A

The teams get back out there, so it's we're a little bit more than halfway through it and.

A

So there's gonna be a lot more data to come and we'll see how it goes. You know fill in those data.

A

Gaps and keep moving forward heading into the the report and then the next steps of this thing. So.

E

Thank you. Thank you grab. Members reminder you can always approach andrea and chris. Your.

E

Co-Chairs with topics for discussion things that you like things, you don't.

E

Like also me, doors are open we're trying to make this as constructive and productive a.

E

Form as possible hope to see you in person sometime this year, we're keeping our.

E

Eyes on that also- and thank you all- have a really nice night we'll be in touch.