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Michael Oliphant - 2 - 30 June 2021 <br />Chevron Environmental Management Co. <br />Surland Homes, Tracy <br />Arcadis had previously proposed a due date for the submittal of the Additional <br />Subsurface Investigation Report and Human Health Risk Screening Evaluation (Report) <br />to be 31 December 2019. Staff concurred with Arcadis’ extension request in a letter <br />dated 3 October 2019. Since the issuance of the 3 October 2019 letter, Arcadis has <br />provided Staff with several updates primarily via email, as they have been working to <br />secure access agreements to install and sample three new soil vapor probes and collect <br />samples from the four existing probes in the UPRR ROW. <br />By 30 August 2021, please submit a status report, to include an update of all Site <br />activities that have been conducted for the installation and sampling of the soil vapor <br />probes, including maps showing completed and proposed soil vapor probe locations, <br />sampling results from the probes, and a proposed due date for the final Report to <br />include the Human Health Risk Evaluation. <br />If there are questions regarding this correspondence, please contact Brian Hitz at(559) <br />445-5170 or by email at Brian.Hitz@waterboards.ca.gov. <br /> <br /> BRIAN HITZ <br />Engineering Geologist <br />PG No. 9379 <br /> <br /> <br /> SHELTON R. GRAY <br />Senior Engineering Geologist <br />cc: San Joaquin County Environmental Health Department, Stockton <br />Allen Just, Arcadis U.S., Inc., Irvine <br />Christine Perez, Arcadis U.S., Inc., San Luis Obispo