Document VaJ3LjoyvOXvm42Dmex8MQQq

UNITED STATESUNITED STATES ENVIRONMENTAL PROTECTION AGENCY *REGION 1 ENVIRONMENTAL AGENCY5 POST OFFICEB OSSTQOUN,A RMAE ,0 21S0U9-I3T9E12 100 PROTECTION Date:Dated as shown on electronic signature(s) Subj:Inspection Report Clean Water Act - National Pollutant Discharge Elimination System (" NPDES ") 12, 14, and 24 South Hunt Road From:Stephanie Tougas, Inspector STEPHANIE Digitally SsTiEPgHnANeIdE TbOUyG AS TOUGAS Date: 2024.07.23 10:48:06 -04'00 ' Thru:Ray Putnam, Inspector To:File I. Facility Information A. Facility Name:12, 14 & 24 South Hunt Road B. Facility Location:24 South Hunt Road Amesbury, MA 01913 C. Facility Contacts: Chad Haynes, Site Superintendent ARCO Design / Build, General Contractor chaynes@arcodb.com Paul Perkins, Excavation Foreman Onyx Corporation, Contractor 18 Wetherbee St. Acton, MA 01720 perkins@onyxcorporation.net Global Property Developers Corp. and Marcus Partners, Inc. Developers Munters Corporation Tenants D. NPDES ID No (s).: MAR1004RO ED_019088A_00012466-00001 II. Background Information A. Date(s) of inspection: July 1, 2024 B. Weather Conditions: clear, 80 degrees F C. US EPA Representative(s): Stephanie Tougas Ray Putnam D. State / Local Representative(s): None E. Federally Enforceable Requirements Covered During the Inspection: Construction General Permit F. Previous Enforcement Actions: None III. Type and Purpose of Inspection Evaluation IV. Facility Description The construction site is located on the south side of South Hunt Road. The site disturbs approximately 34 acres of earth. The project is the construction of a 435,000 square foot manufacturing facility to house HVAC products and associated entrance road and parking area for the company Munters Corporation. The site is heavily sloped: the entrance to the site steeply slopes upward from South Hunt Road to the top where the manufacturing facility and associated parking lot is being constructed. Surrounding large sections of the north and south sides of the facility are retaining walls with the facility structures at the top of the wall and existing grade at the bottom. The site slopes down along the west and south sides. A large detention basin is located in the southwest portion of the site. Wetlands are mapped south of the site, beyond which is the Merrimack River. V. Inspection I called Mr. Chad Haynes the morning of the inspection requesting site access. We arrived at approximately 10:00 AM. A. Opening Conference We met Mr. Haynes and Mr. Perkins at the trailer located on the north side of the facility. I presented my credentials and explained the purpose of the inspection. I explained that we were following up on a tip we received alleging there were some issues with erosion 2 ED_019088A_00012466-00002 control on the site. Mr. Perkins and Mr. Haynes explained that sediment had discharged into the wetland area south of the site, and they had recently been remediating it by removing the sediment and putting down a wetland seed mix. I asked them to explain how they handle the erosion control inspections required by the CGP permit. Mr. Perkins said that Onyx conducts these inspections weekly as well as after a storm event. I asked for a copy of two months'worth of these inspections and the SWPPP, and Mr. Perkins emailed them to me on the spot. Mr. Perkins said Onyx is responsible for correcting any deficiencies. Mr. Perkins said that the Conservation Commission conducts inspections, as well as an additional third party, EcoTec, Inc. Mr. Perkins showed us the construction plans and a recent aerial photo taken by their drone and explained the layout of the site, and showed where the detention basins were located and where the wetland remediation took place. Mr. Haynes said they recently completed the detention basin in the last few weeks, and that they recently installed the sand in the basin. B. Facility Tour Mr. Haynes accompanied us on the site walk, beginning counterclockwise along the north side towards the detention basin. The slopes had been hydroseeded, and we observed the two inlets into the forebay that Mr. Haynes explained drain the north and south sides of the site, respectively. We observed the newly constructed detention basin and noted the sand bottom that was recently installed. We continued walking along the detention basin, along the west side towards the south. We came to a steeper slope in the southwest corner. Mr. Haynes said they had had some issues with this corner in the past, but since installing additional silt fences in tandem, and installing jute netting and seeding the slopes, there hadn't been any recent issues with breaching the silt fences. I reminded Mr. Haynes of the permit condition that silt fences with more than half sediment accumulation need tending to. This section had multiple rows of silt fences, none of which were breached. He also said that they are planning to plant 100 trees along this slope. Continuing the site walk along the south side, we noted a temporary basin, as well as slopes stabilized with stump grindings and gravel. We observed a heavily rip - rapped gulley with an outlet leading downslope into the wooded area. There were check dams in this gulley as well. The emergency spillway to the detention basin outfalls at the top of the rip - rapped gulley. Mr. Haynes said he has not seen overflow since the detention basin was completed. We came across an area where the silt fence was not properly functioning, and Mr. Haynes said he would inform Onyx of this problem right away. We then walked into the woods, down an existing trail towards the wetland remediation that Mr. Haynes said they had removed sediment from that had discharged and laid down a wetland seed mix. Inspector Putnam and I noted some Phragmites growing in the remediation area. 3 ED_019088A_00012466-00003 We walked back upslope and continued the perimeter walk. We came to the southern retaining wall and walked along the bottom. There were a few areas where the silt fencing needed attention. Mr. Haynes said he would inform Onyx of these areas as well. Back up on the parking lot, now beginning to walk north and downslope, Mr. Haynes explained that under the parking lot is perforated PVC piping surrounded by rock at the bottom of the footing of the building that ties into the storm drain. I observed a catch basin they recently opened up and are installing an oil and debris trap structure into. There was a large stockpile at the edge of the parking lot along the west side of the paved entrance, which Mr. Haynes said contained high levels of naturally occurring arsenic, so they are hauling most of it offsite. We walked downslope, observing more catch basins. We observed workers pumping out the catch basins as we walked. We came to the point where Mr. Haynes explained that these catch basins and all the ones downslope towards South Hunt Road receive stormwater from the site and instead of discharging to the detention basin we observed earlier, they feed into the soccer field filtration system. All the catch basins along the entrance road had drain guards installed. The soccer field is located downslope along South Hunt Road and is technically part of a separate project. Mr. Haynes said that that site is developed by Global Properties and that they have a stake in the 24 South Hunt Project as well. The soccer field system discharges the stormwater to a wetland across South Hunt Road and then into Route 495 storm water system. At the entrance of the site, in the northwest corner, was another detention pond. Just below that detention pond, right along South Hunt Road, is a wetland. Mr. Haynes said that there is an inlet in the wetland that discharges to the wetland across South Hunt Road, which we walked across the road to observe. Mr. Haynes explained that they had had some issues with the catch basins by the entrance to the site not functioning properly, which he partially attributed to the DOT accidentally crushing one of the catch basin lines during a road sign installation, or due to the roadside ditch along Route 495 continuing to back up. I walked along the entrance, looking at the various signs that were posted on the fence. I told Mr. Haynes that I did not see any sign indicating the NOI number or how the public could request a copy of the SWPPP. Mr. Haynes said there had been a sign, but it was recently removed during some work and he would have it put back up right away. We walked back up towards the trailer. I observed a swale along the large slope, and another gravel swale along the bench of the slope. This swale had a catch basin that discharged to the soccer field storm system. C. Closing Conference Back at the trailer, I reiterated that there were some areas where the silt fences needed correction. I explained that we cannot make any conclusions in the field if any actions will result from this inspection, but that we would be in touch shortly. I told Mr. Haynes 4 ED_019088A_00012466-00004 that we would follow up with an inspection report within 60 days. We thanked Mr. Haynes for his time and departed the site at approximately 11:45 AM. Unless otherwise noted, this report describes conditions at the facility / property as observed by EPA inspector(s), and / or through records provided to and / or information reported to EPA inspector(s) by facility representatives and as understood by the inspector(s). This report may not capture all operations or activities ongoing at the time of the inspection. This report does not make final determinations on potential areas of concern. Nothing in this report affects EPA's authorities under federal statutes and regulations to pursue further investigation or action. Photo location on mapFile nameDescription 1 20240701_142127754_iOS.jpg Site map 20240701_143410924_iOS.jpg Area along north side of manufacturing 2 facility 20240701_143555544_iOS.jpgStanding on slope looking down at forebay to 3detention basin 420240701_143634094_iOS.jpgSlope recently seeded 20240701_143703909_iOS.jpginlet to forebay draining stormwater from 5north half of site 20240701_143723187_iOS.jpginlet to forebay draining south half of site and 69 east parking lot 7 20240701_143817541_iOS.jpg infiltration basin 8 20240701_143821119_iOS.jpg infiltration basin 9 20240701_143856507_iOS.jpg outfall structure 20240701_144120718_iOS.jpg area at toe of slope with multiple rows of silt 10-fences 20240701_144204822_iOS.jpg 11area to be planted with 100 trees 20240701_144332008_iOS.jpg 12same area with reinforced silt fences 20240701_144435371_iOS.jpganother area along toe of slope with multiple 13rows of silt fences 20240701_144715220_iOS.jpg 14slope with rocks and stump grindings 15 20240701_144752515_iOS.jpg temporary basin 1620240701_144752838_iOS.jpgsame photo as 15 17 20240701_144918719_iOS.jpg overflow outlet 50 ED_019088A_00012466-00005 20240701_145010618_iOS.jpg 18looking upslope of overflow outlet 1920240701_145129761_iOS.jpgarea newly hydroseeded 20240701_145149904_iOS.jpg area along south side with silt fences needing 20 attention 2120240701_145200410_iOS.jpgsilt fences that need attention 20240701_145325581_iOS.jpg path into woods towards wetland 22 remediation 20240701_145419006_iOS.jpg 23following path, stabilized with mulch 2420240701_145457634_iOS.jpgwattles along path 2520240701_145611751_iOS.jpgwetland remediation area 26 20240701_145651025_iOS.jpg accident photo 20240701_150254612_iOS.jpg 27vegetated slope along south side 20240701_150332286_iOS.jpgarea downslope of retaining wall that needs 28 attention 20240701_150356859_iOS.jpganother area downslope of retaining wall on 29south side needing attention 20240701_150417738_iOS.jpg 30gravel slope downslope of retaining wall 20240701_150524191_iOS.jpg area where silt fence needs attention along 31south side Slope recently seeded above the retaining 20240701_150702785_iOS.jpg 32 wall 3320240701_150747673_iOS.jpgsome debris on the slope 20240701_150855337_iOS.jpgcatch basin on site that will feed into forebay 34of detention pond stormwater filter structure to be installed in 20240701_150906366_iOS.jpg 35catch basin 20240701_150956879_iOS.jpg 36sloped along road, swale with inlet structure 20240701_151124194_iOS.jpgparking lot beneath which there is pvc perforated pipe covered in rock that ties into 37storm drain 20240701_151359664_iOS.jpg stock pile to be hauled out shortly - has 38 arsenic 3920240701_151507906_iOS.jpgcurb being built Catch basin that ties into soccer field filtration 20240701_151605309_iOS.jpg 40 system 6 ED_019088A_00012466-00006 20240701_151759485_iOS.jpg 41Area not part of 24 S Hunt project 20240701_152053120_iOS.jpg 42Area not part of 24 S Hunt project 20240701_152135829_iOS.jpg 43slope to be hydroseeded again 44 20240701_152229420_iOS.jpg diversion berm 4520240701_152259557_iOS.jpginstallation of electrical pipes 20240701_152455587_iOS.jpg 46detention ponds along west side of entrance 20240701_152548095_iOS.jpg 47wetland across S. Hunt Rd. that has outlet in it 20240701_152647237_iOS.jpgsilt socks around catch basin that feeds into 48wetland across S Hunt Rd wetland that has outlet but is not 20240701_152657533_iOS.jpg existing 49 visible 50 20240701_152822466_iOS.jpg entrance 51 20240701_152825158_iOS.jpg entrance 5220240701_152840513_iOS.jpgMADEP file number 20240701_153115225_iOS.jpg swale along base of slope going to install 53check dams 20240701_153229598_iOS.jpg 54bench of slope with catch basin catch basin drains to soccer field infiltration 20240701_153251536_iOS.jpg 55 system 7 ED_019088A_00012466-00007