Laserfiche WebLink
0 <br />Former Shell Service Station - 2 - 28 June 2019 <br />1800 A Street <br />Antioch, Contra Costa County <br />• Install and collect soil vapor samples from five permanent soil vapor wells. <br />• Advance eight soil boring to 8 ft bgs, and collect shallow soil samples from 4 and <br />8 ft bgs from each soil boring. <br />• Advance four direct push borings and collect depth discrete grab groundwater <br />samples from the A, B, and C zones. <br />• Soil, soil vapor, and grab groundwater samples will be analyzed for: TPH-G, <br />benzene, toluene, ethylbenzene, total xylenes, MTBE, di -isopropyl ether (DIPE), <br />ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME), tert butyl alcohol <br />(TBA), 1,2 -DCA, ethylene di bromide (EDB), and 1,2 -DCA. <br />• Soil vapor samples will also be analyzed for percent oxygen, and the leak <br />detection compound 1,1-difluoroethane (DFA). <br />• Soil and groundwater samples will also be analyzed for TPH as diesel (TPH-D). <br />• Soil samples collected near the waste oil tank will also be analyzed for semi - <br />volatile organic compounds (SVOCs), oil and grease, polychlorinated biphenyls, <br />and title 22 meals. <br />Central Valley Water Board staff concur with the scope of work presented in the Work <br />Plan Addendum. Please submit a results report by 15 October 2019. <br />If you have any questions or concerns, please contact me via phone at (916) 464-4792 <br />or by email at vera.fischer(a-)-waterboards.ca.gov. <br />V04 �— <br />Vera Fischer, P.G. 8707 <br />Engineering Geologist <br />cc: Technical Staff, State Water Resources Control Board, UST Cleanup Fund, <br />Sacramento Technical Staff, San Joaquin County Environmental Health <br />Department, Stockton <br />Mr. Raynold Kablanow, Ground Zero Analysis, Inc., Modesto <br />