WEBVTT 00:05.539 --> 00:07.539 Hello , everyone and welcome to the 00:07.539 --> 00:10.239 video recording for the uh former PS 00:10.250 --> 00:12.472 Air Force lab meeting to be held on the 00:12.472 --> 00:14.583 first of November . This is a partial 00:14.583 --> 00:16.750 recording of all of the materials that 00:16.750 --> 00:18.861 will be presented on that day . Uh We 00:18.861 --> 00:21.028 are limited to our site eight and a MS 00:21.028 --> 00:23.028 update for this recording . And our 00:23.028 --> 00:22.969 discussion of eggs and other human 00:22.979 --> 00:25.090 health risk assessment topics will be 00:25.090 --> 00:27.201 done in person on the first . Uh with 00:27.201 --> 00:29.312 me is Haley Plant and Jack Bessy to , 00:29.790 --> 00:32.012 to give you this recording next slide , 00:32.012 --> 00:34.580 please . All right , this will be the 00:34.590 --> 00:37.189 agenda once we get to the rab on the 00:37.200 --> 00:39.422 first . So we will start off with the , 00:39.422 --> 00:41.422 you know , of course , playing this 00:41.422 --> 00:43.367 video and then we'll jump into our 00:43.367 --> 00:45.533 welcome introductions and rab business 00:45.533 --> 00:47.533 as we always do and then we'll talk 00:47.533 --> 00:49.422 about , we'll hit up our other um 00:49.422 --> 00:51.589 basically talking points so that we'll 00:51.589 --> 00:53.756 get an update on your task contract as 00:53.756 --> 00:53.599 well as a human health risk assessment 00:53.610 --> 00:55.666 update uh to include some egg data . 00:55.860 --> 00:57.582 And then I believe the city of 00:57.582 --> 00:59.193 Portsmouth has a really nice 00:59.193 --> 01:01.360 presentation for everybody . And uh of 01:01.360 --> 01:03.416 course , everybody's eagerly looking 01:03.416 --> 01:03.290 forward to the dod policy update , 01:03.299 --> 01:05.466 particularly the data sharing . And so 01:05.466 --> 01:07.688 I'll be uh , I'll be presenting on that 01:07.688 --> 01:09.799 and we can have uh an open discussion 01:09.799 --> 01:12.021 and what we're gonna do to implement uh 01:12.021 --> 01:14.021 that policy therapies . All right , 01:14.021 --> 01:16.077 without further ado , I'm gonna kick 01:16.077 --> 01:18.188 this over to Hayley Plant to start on 01:18.188 --> 01:18.160 our technical presentations . Thank you . 01:30.730 --> 01:32.897 Sorry for the delay . Thanks , Chris . 01:32.897 --> 01:34.786 Uh My name is Haley Plant . I'm a 01:34.786 --> 01:36.786 project hydro geologist for WSP and 01:36.786 --> 01:39.119 I'll be presenting updates for the aims , 01:39.119 --> 01:40.952 the A MS or the airfield interim 01:40.952 --> 01:43.250 mitigation system . So to start , um 01:43.260 --> 01:45.204 this figure on the right shows the 01:45.204 --> 01:47.316 components of the aims which includes 01:47.316 --> 01:49.538 the cut off and extraction walls at the 01:49.538 --> 01:51.649 northern extent of the figure and the 01:51.649 --> 01:53.649 interim mitigation well or IMW area 01:53.649 --> 01:56.949 which is indicated by the red box . So 01:56.959 --> 02:00.089 we'll start with the IMW um update the 02:00.099 --> 02:01.988 IMW as you probably know is a key 02:01.988 --> 02:03.710 component of the aims . It was 02:03.710 --> 02:05.766 installed immediately upgrading from 02:05.766 --> 02:07.655 the Haven . Well , and its design 02:07.655 --> 02:09.821 mimics the installation of the Haven . 02:09.821 --> 02:12.043 Well , in order to remove PFAS impacted 02:12.043 --> 02:14.099 groundwater and reduce the amount of 02:14.099 --> 02:16.240 PFAS in the supply . Well , the 02:16.250 --> 02:18.417 operational extraction capacity of the 02:18.417 --> 02:21.190 area around the IMW and Haven Mall is 02:21.199 --> 02:24.649 300 gallons per minute . During the AES 02:24.660 --> 02:26.899 design modeling demonstrated that 02:26.910 --> 02:29.550 extraction above 300 G PM from this 02:29.559 --> 02:32.160 area result in contaminants bypassing 02:32.169 --> 02:34.225 the upgrading and cut off extraction 02:34.225 --> 02:36.225 wells which compromises the overall 02:36.225 --> 02:39.710 effectiveness of the aims . The IMW was 02:39.720 --> 02:41.831 designed to run concurrently with the 02:41.831 --> 02:44.740 hewell at a combined extraction rate of 02:44.750 --> 02:47.160 300 gallons per minute . So under 02:47.169 --> 02:49.336 current operations , the Haven well is 02:49.336 --> 02:51.389 run at a maximum of 200 gallons per 02:51.399 --> 02:53.510 minute , which then allows the IMW to 02:53.510 --> 02:55.399 run at a minimum of 100 gallons a 02:55.399 --> 02:57.570 minute . Extraction operations are 02:57.580 --> 02:59.940 co-ordinated by WSP the Air Force and 02:59.949 --> 03:01.838 the city of Portsmouth to balance 03:01.838 --> 03:03.919 extraction from this area . It's 03:03.929 --> 03:06.096 important to note that when the IMW is 03:06.096 --> 03:08.669 running concentration of PFAS in the 03:08.679 --> 03:10.940 Haven . Well decrease when the haven 03:10.949 --> 03:12.970 well was turned back online . Um In 03:12.979 --> 03:16.279 July 2021 PFAS concentrations in the 03:16.289 --> 03:18.740 haven well were over 75% lower than the 03:18.750 --> 03:20.583 initial concentrations that were 03:20.583 --> 03:22.529 identified in 2014 , which clearly 03:22.539 --> 03:24.650 demonstrates the effectiveness of the 03:24.650 --> 03:26.206 interim mitigation . Well , 03:32.429 --> 03:35.330 the aims also utilizes um five 03:35.339 --> 03:37.506 extraction wells north of the IMW that 03:37.506 --> 03:39.450 were on the the figure on the last 03:39.450 --> 03:41.720 slide , these wells function , they cut 03:41.729 --> 03:44.050 off groundwater flow um going south 03:44.059 --> 03:47.990 along the airfield in October 2021 03:48.000 --> 03:50.111 during routine cleaning of one of the 03:50.111 --> 03:53.270 aims extraction wells . Ew one WSP 03:53.279 --> 03:55.335 identified a vertical break near the 03:55.335 --> 03:57.168 top of the wells screen that was 03:57.168 --> 03:59.335 allowing filter pack material to enter 03:59.335 --> 04:01.557 the well . And as an interim remedy , a 04:01.557 --> 04:03.679 temporary seal was placed to support 04:03.690 --> 04:05.857 the wells screen . This vertical break 04:05.857 --> 04:08.079 is pictured in the top photo um and the 04:08.079 --> 04:10.134 filter pack material pictured on the 04:10.134 --> 04:13.419 bottom left since then . In October 04:13.429 --> 04:16.559 2021 capacity of the uh the well has 04:16.570 --> 04:18.850 declined overall because of its limited 04:18.859 --> 04:21.549 capacity . Replacement of EW one was 04:21.559 --> 04:23.670 initially scheduled for the spring of 04:23.670 --> 04:25.730 2024 . However , during routine 04:25.739 --> 04:27.850 maintenance activities on Wednesday , 04:27.850 --> 04:30.072 August 9th , an additional screen break 04:30.072 --> 04:32.295 was identified and the well filled with 04:32.295 --> 04:34.461 sediment resulting in ultimate failure 04:34.461 --> 04:36.649 of the well due to the well's failure 04:36.660 --> 04:38.771 and the importance of keeping all the 04:38.771 --> 04:40.938 extraction walls online . The schedule 04:40.938 --> 04:43.160 for replacement of EW one was expedited 04:43.160 --> 04:45.049 and this replacement is currently 04:45.049 --> 04:44.630 underway 04:50.920 --> 04:53.670 on August 18th . WSP drilled a pilot 04:53.679 --> 04:56.589 boring for the replacement of ew one . 04:57.239 --> 04:59.295 The replacement well is EW one R and 04:59.295 --> 05:01.779 it's located 20 ft west of the original 05:01.790 --> 05:05.000 ew one location data collected during 05:05.010 --> 05:07.299 drilling was used to develop the design 05:07.309 --> 05:09.700 of a new extraction well um which will 05:09.709 --> 05:11.765 maximize extraction capacity for the 05:11.765 --> 05:14.010 surrounding material . And as of the 05:14.019 --> 05:16.010 date of this recording WSP has 05:16.019 --> 05:17.852 completed the well designed with 05:17.852 --> 05:20.049 concurrence from the Air Force U SEPA 05:20.059 --> 05:22.839 and New Hampshire Des . Looking ahead 05:23.019 --> 05:25.600 the installation of EW one R is 05:25.609 --> 05:28.429 expected in November 2023 which will be 05:28.440 --> 05:30.051 followed by well development 05:30.051 --> 05:31.940 installation of the well pump and 05:31.940 --> 05:34.107 related infrastructure and connections 05:34.107 --> 05:37.320 to the existing um AMES electrical and 05:37.329 --> 05:40.320 water lines . Currently WSP is 05:40.329 --> 05:43.089 continuing coordinate with the PD A and 05:43.100 --> 05:45.019 civil contractors to finalize the 05:45.029 --> 05:47.839 construction details . Uh Next up will 05:47.850 --> 05:50.017 be Jack Desy . We'll present an update 05:50.017 --> 05:51.017 on site . 05:55.269 --> 05:57.519 Thank you , Hayley . Hello everyone . 05:57.529 --> 05:59.307 My name is Jack Bessie . I'm an 05:59.307 --> 06:01.362 engineer with WSP who spent the last 06:01.362 --> 06:03.529 three plus years working on optimizing 06:03.529 --> 06:05.418 the site eight interim mitigation 06:05.418 --> 06:07.585 system . I want to start by explaining 06:07.585 --> 06:09.696 what I mean by optimization . Since I 06:09.696 --> 06:11.973 know it's a term we throw around a lot , 06:11.973 --> 06:14.029 but I think is worth clarifying both 06:14.029 --> 06:16.029 treatment systems were designed and 06:16.029 --> 06:18.196 built as interim response actions in a 06:18.196 --> 06:20.140 very short period of time with the 06:20.140 --> 06:21.973 understanding that they wouldn't 06:21.973 --> 06:23.973 operate perfectly immediately after 06:23.973 --> 06:26.029 they started up . But that through a 06:26.029 --> 06:28.251 step by step process of identifying and 06:28.251 --> 06:28.190 correcting problems or choke points in 06:28.200 --> 06:30.256 the process , they would get optimal 06:30.445 --> 06:32.501 and reach the goals set by the hydro 06:32.501 --> 06:35.035 geologist to us . Optimization is about 06:35.045 --> 06:36.934 constant learning to identify new 06:36.934 --> 06:38.989 limitations in the process . Come up 06:38.989 --> 06:40.767 with new ideas to address those 06:40.767 --> 06:42.984 limitations , implement those ideas to 06:42.994 --> 06:45.105 see if it worked as intended and then 06:45.105 --> 06:47.216 start looking for the next limitation 06:47.859 --> 06:49.970 at site . Eight iron fouling is shown 06:49.970 --> 06:52.192 in the two pictures on the right of the 06:52.192 --> 06:54.137 screen continues to be the primary 06:54.137 --> 06:56.192 challenge and is the main limitation 06:56.192 --> 06:58.192 for increasing extraction rates and 06:58.192 --> 07:00.359 treatment flow rates . The pictures uh 07:00.359 --> 07:02.829 on the top right show a pipe filled 07:02.839 --> 07:04.950 with iron build up which dramatically 07:04.950 --> 07:07.061 reduces the flow capacity through the 07:07.061 --> 07:08.950 pipe . On the bottom , right , an 07:08.950 --> 07:11.529 extraction pump fed with iron which 07:11.540 --> 07:13.596 reduces the maximum flow that a well 07:13.596 --> 07:15.839 pump can produce . Operators are 07:15.850 --> 07:17.794 performing additional cleaning and 07:17.794 --> 07:19.794 maintenance to limit the extraction 07:19.794 --> 07:21.906 capacity reductions from this type of 07:21.906 --> 07:23.906 fouling . And through their step by 07:23.906 --> 07:26.128 step , optimization processes have been 07:26.128 --> 07:27.961 able to dramatically improve the 07:27.961 --> 07:29.906 handling of iron within the site . 07:29.906 --> 07:31.961 Eight building and treatment process 07:31.961 --> 07:34.128 allowing more contaminated groundwater 07:34.128 --> 07:36.072 to be treated . The picture in the 07:36.072 --> 07:38.128 center bottom of the screen uh shows 07:38.128 --> 07:40.350 the Lamela clarifier , the primary iron 07:40.350 --> 07:42.350 removal tool , we have uh producing 07:42.350 --> 07:44.239 basically iron free water flowing 07:44.239 --> 07:46.420 through that top channel uh as it's 07:46.429 --> 07:49.700 intended to do . Despite the challenges 07:49.709 --> 07:51.431 with fowling , the incremental 07:51.431 --> 07:53.487 improvement has resulted in capacity 07:53.487 --> 07:55.320 increases with decreasing system 07:55.320 --> 07:57.265 downtime . However , operators are 07:57.265 --> 07:59.431 running out of avenues for significant 07:59.431 --> 08:01.487 improvement without major changes to 08:01.487 --> 08:03.598 the equipment in the facility and are 08:03.598 --> 08:05.820 approaching their maximum capacity with 08:05.820 --> 08:07.765 the existing equipment which is uh 08:07.765 --> 08:09.769 still below the overall target . 08:15.089 --> 08:17.311 Operators have been increasing . Uh The 08:17.311 --> 08:19.422 site eight treatment flow through the 08:19.422 --> 08:21.311 series of improvements . Uh We're 08:21.311 --> 08:23.510 discussing um they've been identifying 08:23.519 --> 08:25.519 specific limitations , applying the 08:25.519 --> 08:27.297 corrective measures and then re 08:27.297 --> 08:29.519 evaluating to identify the next . Since 08:29.519 --> 08:31.910 the last rab update on the site , eight , 08:32.159 --> 08:34.320 average operating flow has increased 08:34.330 --> 08:36.441 notably and we're now able to run all 08:36.441 --> 08:38.608 10 extraction wells , albeit not quite 08:38.608 --> 08:40.830 at full speed . The chart here shows 08:40.840 --> 08:43.062 the daily average flow rates in gallons 08:43.062 --> 08:44.840 per minute and really , I think 08:44.840 --> 08:46.729 demonstrates the progress made uh 08:46.739 --> 08:48.280 throughout this last year 08:56.419 --> 08:59.380 to address uh the capacity limitations , 08:59.390 --> 09:01.919 an optimization plan has been developed 09:01.929 --> 09:04.096 to bring the site eight I MS treatment 09:04.096 --> 09:06.262 capacity to match the extraction while 09:06.262 --> 09:08.151 pumping capacity and goals of the 09:08.151 --> 09:10.190 Hydroge Hydro Geological team . The 09:10.200 --> 09:12.311 first step in this plan was to remove 09:12.311 --> 09:14.533 the regenerative ion exchange resin and 09:14.533 --> 09:16.756 replace it with single use ion exchange 09:16.756 --> 09:18.811 resin is used at the games . The new 09:18.811 --> 09:20.811 resin was put in the same treatment 09:20.811 --> 09:23.033 tanks uh which are shown in the picture 09:23.033 --> 09:25.033 here . This was completed this past 09:25.033 --> 09:27.200 spring and the new resin is performing 09:27.200 --> 09:29.422 well as expected . Uh This step was one 09:29.422 --> 09:31.478 of the many iterative steps taken uh 09:31.478 --> 09:33.478 this past year to improve treatment 09:33.478 --> 09:34.478 capacity . 09:38.099 --> 09:40.409 The next step in the optimization plan 09:40.419 --> 09:42.750 is to test an additional an additional 09:42.760 --> 09:44.900 type of filtration that will improve 09:44.909 --> 09:47.200 metals and solids removal . Prior to 09:47.400 --> 09:49.400 phos treatment , the drawing on the 09:49.400 --> 09:51.622 right of this screen uh represents that 09:51.622 --> 09:53.809 type of filter . This test is 09:53.820 --> 09:55.987 anticipated to begin early this winter 09:55.987 --> 09:58.130 and will inform fu future changes to 09:58.140 --> 10:00.362 the process that will improve treatment 10:00.362 --> 10:01.000 capacity . 10:06.619 --> 10:08.841 The core of the optimization plan we've 10:08.841 --> 10:10.952 developed is to make use of the space 10:10.952 --> 10:13.063 freed up by removing the regeneration 10:13.063 --> 10:14.952 support equipment and replace and 10:14.952 --> 10:17.250 upsize a number of key process units 10:17.260 --> 10:19.038 that have been determined to be 10:19.038 --> 10:20.760 undersized for the dynamic and 10:20.760 --> 10:22.816 challenging groundwater conditions . 10:22.816 --> 10:25.038 The site eight I MS must treat the plan 10:25.038 --> 10:27.260 assumes a new filter similar to the one 10:27.260 --> 10:29.482 being pilot tested this winter would be 10:29.482 --> 10:31.427 installed along with several major 10:31.427 --> 10:33.649 process units that would be replaced or 10:33.649 --> 10:35.704 upsized to remove limitations within 10:35.704 --> 10:37.982 the process to increase treatment flow . 10:38.630 --> 10:40.669 The plan is not final and no formal 10:40.679 --> 10:42.790 design for this has been completed at 10:42.790 --> 10:45.012 this time , the core elements of it are 10:45.012 --> 10:46.901 feasible and based heavily on the 10:46.901 --> 10:49.068 experience we've gained operating this 10:49.068 --> 10:51.123 system since it was started up . And 10:51.123 --> 10:53.346 just as a note , the two units that you 10:53.346 --> 10:55.290 see the sledge filter press in the 10:55.290 --> 10:57.457 foreground and the sledge holding tank 10:57.457 --> 10:59.568 in the background are both units that 10:59.568 --> 11:01.735 we've identified as key limitations to 11:01.735 --> 11:04.130 increasing uh flow further and would 11:04.140 --> 11:06.830 are both likely to be replaced or 11:06.840 --> 11:08.599 duplicated . Uh through this 11:08.609 --> 11:09.900 optimization plan . 11:15.159 --> 11:17.289 I know a number of RB members visited 11:17.299 --> 11:19.299 the site eight treatment plant this 11:19.299 --> 11:21.466 summer and likely saw the large number 11:21.466 --> 11:23.466 of drums and other waste containers 11:23.466 --> 11:23.340 stored in front of the treatment plant 11:23.349 --> 11:25.182 building . And we just wanted to 11:25.182 --> 11:27.405 provide an update on that these process 11:27.405 --> 11:29.405 generated phos impacted wastes have 11:29.405 --> 11:31.571 been stored while a new vendor and end 11:31.571 --> 11:33.627 disposal facility was identified and 11:33.627 --> 11:36.380 set up . Uh as of the date of the rab , 11:36.390 --> 11:38.612 uh The vast majority of this waste will 11:38.612 --> 11:40.557 have been removed from peas and is 11:40.557 --> 11:42.390 being transported to an approved 11:42.390 --> 11:44.390 permitted disposal site in Michigan 11:44.390 --> 11:46.570 where all phos waste uh from peas will 11:46.580 --> 11:48.679 be transported . Going forward the 11:48.690 --> 11:51.390 pictures here uh going clockwise from 11:51.400 --> 11:54.580 the top left uh show some used ion 11:54.590 --> 11:57.070 exchange resin uh that's removed a lot 11:57.080 --> 11:59.358 of the phos from the groundwater there . 11:59.358 --> 12:02.080 Uh pressed sludge solids , mostly iron 12:02.090 --> 12:04.590 in the top right and then some used bag 12:04.599 --> 12:06.266 filters on the bottom there . 12:11.169 --> 12:13.336 Even with the operational challenges , 12:13.336 --> 12:16.229 the C I MS has posed , we've seen 12:16.239 --> 12:18.350 demonstrated impacts of the treatment 12:18.350 --> 12:20.461 system in hydraulic capture and water 12:20.461 --> 12:22.683 quality . The extraction wells continue 12:22.683 --> 12:24.461 to maintain hydraulic control , 12:24.461 --> 12:26.683 preventing the spread of PFAS impact to 12:26.683 --> 12:28.295 groundwater declines in phos 12:28.359 --> 12:30.248 concentrations have been observed 12:30.248 --> 12:32.192 across the C eight I MS Monitoring 12:32.192 --> 12:34.248 network including within the bedrock 12:34.248 --> 12:35.915 trough where 70% of the wells 12:35.915 --> 12:37.859 demonstrate decreasing or probable 12:37.859 --> 12:39.880 decrease in concentrations of phos 12:40.169 --> 12:42.950 bedrock trough is the area indicated by 12:42.960 --> 12:46.299 the brown dotted lines on the picture 12:46.309 --> 12:50.010 on the left here . Uh Outside of the 12:50.020 --> 12:51.919 bedrock trough , reduced phos 12:51.979 --> 12:54.146 concentrations as compared to pre I MS 12:54.150 --> 12:56.900 start up , levels have been observed at 12:57.070 --> 13:00.940 08-6046 A bedrock monitoring . Well to 13:00.950 --> 13:03.219 the northwest of the bedrock trough at 13:03.229 --> 13:05.507 Watering Spring and in Pickering Brook , 13:05.507 --> 13:08.690 north of the bedrock trough , that's 13:08.700 --> 13:10.533 all for uh our update on the two 13:10.539 --> 13:13.239 treatment plants at peas . And I'll 13:13.250 --> 13:15.250 pass the presentation back to Chris 13:15.250 --> 13:17.028 King to wrap up our recording . 13:23.669 --> 13:25.940 All right . Thank you for that , Jack 13:25.950 --> 13:28.172 and uh Haley . That's a lot to unpack . 13:28.172 --> 13:30.283 Um Hopefully you'll have some time to 13:30.283 --> 13:32.394 take a look at this a couple of times 13:32.394 --> 13:32.349 and develop any further questions you 13:32.359 --> 13:34.880 might have on site eight or aims . Um 13:34.890 --> 13:37.440 Otherwise , uh you can , our meeting is 13:37.450 --> 13:39.450 on the first of November at the New 13:39.450 --> 13:41.672 Hampshire Des Building . Uh the address 13:41.672 --> 13:43.894 is shown on the screen here . Uh We are 13:43.894 --> 13:46.228 looking forward to seeing you in person . 13:46.228 --> 13:45.739 There's a lot more to discuss . We have 13:45.750 --> 13:47.750 some other presentations as well as 13:47.750 --> 13:49.472 mentioned before . The City of 13:49.472 --> 13:51.528 Portsmouth has a lot . Uh They wanna 13:51.528 --> 13:53.639 share about the operations of their , 13:53.639 --> 13:55.583 their treatment plant as well . Um 13:55.583 --> 13:55.419 Could you please return on the previous 13:55.609 --> 13:58.030 slide ? So right now , um this is the 13:58.039 --> 14:00.909 presentation schedule that we had . Uh , 14:01.119 --> 14:03.063 this , this video is , um , it's a 14:03.063 --> 14:05.063 partial recording , so we have much 14:05.063 --> 14:07.175 more to discuss . So please , uh , if 14:07.175 --> 14:09.397 you can arrive by five o'clock and then 14:09.397 --> 14:11.508 we'll begin our discussions there and 14:11.508 --> 14:11.500 we'll also have some other materials 14:11.510 --> 14:13.566 for you to walk around and look at , 14:13.566 --> 14:15.788 should you decide to show up early at 4 14:15.788 --> 14:17.843 30 ? We'll all be there . We'll have 14:17.843 --> 14:17.580 our experts both in the Air Force and 14:17.739 --> 14:20.239 uh WSP . And also we'll be saying 14:20.250 --> 14:22.306 goodbye to Ona Ferguson . So most of 14:22.306 --> 14:24.528 you all who know her , um , please come 14:24.528 --> 14:26.750 and wish her well in her new endeavor . 14:26.750 --> 14:28.917 All right . Until the first , we shall 14:28.917 --> 14:31.028 see you there . Bye everybody . Thank 14:31.028 --> 14:29.500 you .