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1 <br />Field, Cheryl [EHD] <br />From:McClellon, Robert [EHD] <br />Sent:Thursday, April 21, 2022 2:42 PM <br />To:Field, Cheryl [EHD] <br />Subject:FW: Pilkington - 500 E Louise Ave, Lathrop- WU1 excavation and removal: Trenching <br />Plan <br />Attachments:Pilkington Figure 4 Excavation Trenching.pdf <br /> <br /> <br />From: Brian W. Millman <bmillman@advgeoenv.com> <br />Sent: Tuesday, April 2, 2019 7:33 AM <br />To: Robert McClellon [EH] <RMcClellon@sjcehd.com>; Linda Turkatte [EH] <LTurkatte@sjcehd.com>; Palmer, <br />Ann@Waterboards <Ann.Palmer@waterboards.ca.gov> <br />Cc: 'Dana Parry' <danap@reynoldsandbrown.com>; Joe Brusca <jbrusca@bruscaassociates.com>; Robert Marty <br /><rmarty@advgeoenv.com>; Djuth, Gerald@Waterboards <Gerald.Djuth@waterboards.ca.gov>; Roger Ashton <br />(roger@ecs-corp.net) <roger@ecs-corp.net>; Jesse Easter [EH] <jeaster@sjcehd.com> <br />Subject: RE: Pilkington - 500 E Louise Ave, Lathrop- WU1 excavation and removal: Trenching Plan <br /> <br />Hello Robert and Linda, <br /> <br />A figure is attached depicting proposed confirmation trenching locations inside the Waste Unit 1 <br />excavation area. Advanced GeoEnvironmental is proposing 15 trenches approximately 45 feet apart <br />to cover the area and confirm wastes have been removed from Waste Unit 1 . The North-South <br />trenches will be approximately 20-25 feet long, the East-West trenches will be approximately 25-30 <br />feet long, and all trenches will be excavated to approximately 6-7 feet below pre-excavation surface <br />grade (approximately 3-5 feet below excavation surface grade). <br /> <br />Please don’t hesitate to contact me with any questions or comments. <br /> <br />Thanks, <br /> <br /> <br />Brian W. Millman, P.G. <br />Senior Geologist <br />CA Professional Geologist No. 8574 <br />CA QSP/QSD No. 26882 <br />Advanced GeoEnvironmental, Inc. <br />Environmental • Compliance • Industrial Hygiene • Geotechnical <br />Phone: 800-511-9300 <br />Fax: 888-445-8786 <br />bmillman@advgeoenv.com <br />www.advgeoenv.com <br /> <br />“Working in Partnership with People, Business and the Environment”