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CONESTOGA-ROVERS <br /> & ASSOCIATES <br /> April 21, 2015 2 Reference No . 632277D <br /> adjacent and down-gradient of the pump islands and UST's meets LTCP criteria, which represent the <br /> highest concentrations historically detected onsite, then shallow soil in other areas of the site will also <br /> meet LTCP criteria and no further action is warranted. If it is determined that benzene concentrations in <br /> shallow soil downgradient of the USTs and dispensers have not attenuated to levels acceptable for the <br /> LTCP, then further soil investigation or the implementation of a soil management plan will be <br /> appropriate. The advancement, sampling, and analysis of the three proposed borings will follow the <br /> procedures outlined in CRA's December 22, 2014 work plan . <br /> Schedule <br /> CRA will begin the proposed work upon receipt of SJCEHD approval of this work plan addendum . CRA <br /> will submit a report of findings approximately 60 days following the receipt of all final analytical data <br /> We appreciate the opportunity to work with you on this project. Please contact Nate Allen at <br /> (916) 889-8929 if you have any questions or require additional information . <br /> Sincerely, <br /> CONESTOGA-ROVERS & ASSOCIATES <br /> y\ONAL G4cOO <br /> a NAFHAN SCOTTALLBd <br /> Nathan S. Allen, PG 9075 <br /> NA/de/2 <br /> Encl . <br /> Figure 1 Vicinity Map <br /> Figure 2 Site Plan <br /> Attachment A Regulatory Correspondence <br /> cc: Mr. Brian Waite, Chevron (electronic copy) <br /> Mr. Jim Barton, RWQCB <br /> Ms. Stella Rickman, property owner <br /> Ms. Kathryn Pudenz, property owner <br /> Mr. Park Kyung Ho, Tracy Express Wash & Lube <br /> Worldwide Engineering, Environmental, Construction, and IT Services <br />