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If you have any questions, please contact me by phone at (916) 464-4792 or by email at <br />vera.fischer@waterboards.ca.gov . <br />Vera Fischer, P.G. <br />Engineering Geologist <br />Levand-Bright Property 2 23 April 2018 <br />3 East 11th Street <br />Tracy, San Joaquin County <br />A total of twenty-two (22) soil samples were submitted for laboratory analysis. AGE detected <br />TPH-G in five (5) of the soil samples at concentrations ranging from 19 milligrams per kilogram <br />to 330 mg/kg. Total xylenes were detected in soil sample B2 at 15 ft bgs at 0.010 mg/kg. Total <br />lead was detected in all 22 soil samples at concentrations ranging from 6.0 mg/kg to 16 mg/kg. <br />No additional analytes were reported above laboratory detection limits in the soil samples. AGE <br />concluded that lead detected in Site soils is within normal background concentrations. <br />AGE detected petroleum hydrocarbons in shallow grab groundwater at maximum <br />concentrations of 45,000 micrograms per liter (ug/L) TPH-G, 62 ug/L benzene, 620 ug/L <br />naphthalene, and 0.91 ug/L tetrachloroethane (PCE). AGE detected maximum concentrations <br />in deep groundwater of 910 ug/L TPH-G, 0.72 ug/L benzene, 3.4 ug/L naphthalene, 2.5 ug/L <br />PCE, and 0.51 ug/L trichloroethene (TOE). <br />AGE recommended preparation of a work plan proposing additional assessment at the Site to <br />define the extents of groundwater contamination. AGE further recommended researching the <br />immediate surrounding area to the west of the Site to determine the potential for an additional <br />source/off-Site source of the petroleum hydrocarbons. <br />Central Valley Water Board staff concurs with AG F's recommendation to submit a Work Plan. <br />Please submit a Site Assessment Work Plan (Work Plan) by 30 June 2018. The Work Plan <br />should present a scope of work to install a sufficient number of wells and/or borings to complete <br />plume delineation, and to allow for monitoring of stability of petroleum hydrocarbons in <br />groundwater. <br />cc: Technical Staff, Underground Storage Tank Cleanup Fund, Sacramento <br />Technical Staff, San Joaquin County Environmental Health Department, Stockton <br />Mr. Brian Millman, Advanced GeoEnvironmental, Inc., Stockton