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Lor Xiong [EH] <br /> From: Maroon, Nathan <NMaroon@partneresi.com> <br /> Sent: Thursday, October 5, 2017 12:53 PM <br /> To: Lor Xiong [EH] <br /> Subject: RE: Updated Soil Gas Sampling Methodology 434 Dr. MLK Jr. Blvd <br /> Attachments: Updated Soil Gas Sampling Methodology.docx <br /> Whoops. Missed that. Here is the edit. <br /> Nate Maroon <br /> Staff Scientist—Subsurface Investigation <br /> PARTNER ENGINEERING AND SCIENCE,INC. <br /> 1017 22"0 Avenue, Suite 107, Oakland, CA 94606 <br /> Cell: 510-410-1009 1 Direct: 510-431-6262 <br /> From: Lor Xiong [EH] [mailto:lxiong@sjcehd.com] <br /> Sent:Thursday, October 05, 2017 12:50 PM <br /> To: Maroon, Nathan <NMaroon@partneresi.com> <br /> Cc: Michael Kith [EH] <mkith @sjcehd.com> <br /> Subject: RE: Updated Soil Gas Sampling Methodology 434 Dr. MLK Jr. Blvd <br /> Hi Nate, <br /> Per our conversation, we required the use of grout cement for back filling. Your plan still states that boreholes will be <br /> backfilled with dry,granular bentonite to approximately six inches below the desired sampling depth. <br /> Boreholes must be backfill with grout cement to approximately six inches below the desired sampling depth. After <br /> sampling, all content from the construction of the soil vapor probes must be removed and be grouted with grout cement <br /> from sampling depth to the ground surface. <br /> Lor Xiong,REHS <br /> San Joaquin County Environmental Health Department <br /> 1868 E.Hazelton Ave. <br /> Stockton,CA 95205 <br /> Ixiong@sicehd.com <br /> (209)468-2807 <br /> From: Maroon, Nathan [mailto:NMaroon@partneresi.com] <br /> Sent:Thursday, October 5, 2017 12:25 PM <br /> To: Lor Xiong [EH] <Ixiong@sicehd.com> <br /> Subject: Updated Soil Gas Sampling Methodology 434 Dr. MLK Jr. Blvd <br /> See attached. <br /> Nate Maroon <br /> Staff Scientist—Subsurface Investigation <br /> PARTNER ENGINEERING AND SCIENCE,INC. <br /> 1017 22"d Avenue, Suite 107, Oakland, CA 94606 <br /> 1 <br />