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Backus, Garrett [EHD] <br />From: Backus, Garrett [EHD] <br />Sent: Thursday, September 14, 2023 10:33 AM <br />To: Casebeer, Nathan@Waterboards <br />Cc: Subbotnikova, Natalia [EHD]; Ambrose, Sabra@Cal Recycle <br />Subject: RE: Former Pilkington North America Glass Disposal: 500 East Louise Avenue, Lathrop, <br />San Joaquin County <br />Attachments: 2019 4-12-19 WB Order to investigate wider scope of waste on 500 E Louise Ave.pdf; <br />2019 6-10-19 Letter from AGE to EHD - WU-1 sliver verification samples.pdf; 2019 <br />3-18-19 email from AGE stating WU1 sliver excavation is taking place.pdf <br />Hi Nathan, <br />I attached what we have about the WU-1 sliver area on Parcel A. In late March 2019 the area was excavated to a depth <br />five feet below grade and the glass / soil waste was stockpiled on-site. Confirmation samples were taken in April <br />2019. It's unknown what happened to the stockpile; possibly it was placed back in the excavation at a later date. More <br />details about these operations are in Appendix B of the 12 July 2019 Soil Management Plan mentioned in your draft <br />comment. <br />Our concern is that the stockpile was placed back in the excavation possibly in late 2019 or 2020. The site never <br />provided disposal records. There was no sampling or analysis of the stockpile so the level of contamination is unknown <br />except for the sampling done at another time on the main part of the WU-1 on the 17100 Murphy Parkway <br />parcel. Inspections this year has found glass waste scattered south of the railroad spur on the 500 N Louise Ave parcel <br />in an area several hundred feet long. <br />Thank you, <br />Garrett Backus, Lead Senior REHS <br />San Joaquin County Environmental Health Department <br />1868 E Hazelton Ave, Stockton, CA 95205 <br />Desk: (209) 468-2986 <br />Cell: (209) 616-3030 <br />Email: gbackus(a)sigov.org <br />Department: https://www.sigov.org/department/envhealth <br />From: Casebeer, Nathan@Waterboards <Nathan.Casebeer@waterboards.ca.gov> <br />Sent: Thursday, September 14, 2023 8:56 AM <br />To: Backus, Garrett [EHD] <gbackus@sjgov.org> <br />Cc: Subbotnikova, Natalia [EHD] <nsubbotnikova@sjgov.org>; Ambrose, Sabra@CalRecycle <br /><Sabra.Ambrose@ CaIRecycle. ca.gov> <br />Subject: RE: Former Pilkington North America Glass Disposal: 500 East Louise Avenue, Lathrop, San Joaquin County <br />Hi Garrett, <br />Nicholas White recently transferred to another Regional Board office. So any correspondence regarding the Pilkington <br />Site can be directed to me. <br />