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Y 901 IMF <br /> y <br /> IlilE►i; s)$: is7 V707 , ` ,581 KAPREALIAN ENG. <br /> 002 <br /> KAPRE LIAN ENCIANEEF11NG, INC. <br /> Consulting Engineers <br /> R O. 60X 913 <br /> BENICIA,CA 04510 <br /> (415)616.9100 (707)74G•6975 <br /> KEI-P88-0810 <br /> San aoaquin County Department September 15, 1988 <br /> of Environmental Health <br /> P- p. Box 2009 <br /> Stockton, CA 95201 <br /> Attn: Ms. Diane Hinson <br /> Re: Work Plan <br /> Mobil Bulk plant <br /> 500 E. Grantline Road <br /> Tracy. Cis <br /> �• INTRODUCTION <br /> A. Location: Mobil Bulk Plant, 500 E. Grantline Road, Tracy, <br /> San Joaquin County, California <br /> B. laagI9raUDCA: Unocal Corporation <br /> contracted Kaprealian <br /> Engineering, Tnc. (KEI) to Undertake soil sampling following <br /> the removal of one 1000 gallon underground gasoline storage <br /> tank at the site. Two samples of native soil, labeled A and <br /> B, and one water samplo,. labeled W-1, were collected on <br /> August 22, 1988 in the;: presence of Captain A. C. Halford of <br /> the Tracy Fire Department. The samples were analyzed by <br /> Sequoia Analytical Laboratory for total petroleum <br /> hydrocarbon (TPH) as gasoline, benzene, toluene, xylene, <br /> ethylbenzene (BTXE) , ethylene dibromide (EDB) and total <br /> organic lead. The analytical results showed T.PH of 200 and <br /> 240 ppm for A and B, respectively. The water sample had <br /> 0.13 ppm benzene. A.na?yses are summarized in Fable '1. <br /> Details of the investigation are described in KEI's report . <br /> dated August 30, 1988. <br /> To.......-begin - to .._.idantif ............ <br /> :..he extent:.. of...._..the <br /> contamination, Mobil. proposes to e <br /> boreholes to collect soil. and' drill sixsubsurface <br /> exploratory . <br /> outlined in this._work plan. groundwater samples, as <br /> e- gite�Hist2ry <br /> 1. Current operating business is a bulk plant and <br /> marketing station. Mobil intends to demolish . the <br /> fability and abandon the site. <br /> 2 Previous businesses at the site are .unknown, <br />