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`.. <br /> HORIZ01v ENVIRONMENThi. INC. <br /> ^lwmmmnm� 'Specialists In Site Assessment:Remedial Testing.Design and Operation - <br /> �r <br /> November 15, I995 <br /> Ms.Diane Hinson <br /> San loaq*County Environmental Health Department <br /> 304 Fast Weber Street, Third Floor <br /> P.O.Box 3&S <br /> Stockton, Cafifornia 95201 <br /> Subject: Executive Summary of Workplan <br /> Former Discovery Chevrolet, 1615 110L Street,Tracy, California. <br /> Ms.R=on: <br /> This letter summaries the workto be performed as interim soil remediation associated with the <br /> former gasoline underground storage tanks(UST)at the above-referenced site. Approximate <br /> location of the former USTs is sbown on the attached Site Plan. This work is described in the <br /> Workplan dated October 25, 1995 and approved during a meeting between Ms.Michelle Nokes <br /> of Winner Ford, Mr. Crary Harker of Horizon Environmental Inc. (Horizon), and Ms. Diane <br /> H'mson of the Sai Joaquin County public Health Services(SJCPHS)on November 7, 1995. <br /> The interim soil remediation is in response to the discovery of gasoline hydrocarbons in soil <br /> when the two gasoline USTs were removed. The purpose is to remove hydrocarbon bearing soil <br /> which may be a source of hydrocarbs?ns into the gouadwater. Son samples collected at the base <br /> of the UST excavation after removal were analyzed and fWad to contain total petroleum <br /> hydrocarbons as gasoline(T-PHO at concentrations ranging from 920 to 4,400 parts per million. <br /> (PPm)- <br /> To complete into soil remediation the followitng scope of work will be performed; <br /> Obtainp=uts�prepare a site sa&V pLin,notify Underground Service Alert and sched'dle <br /> contractors. <br /> Excavate approximately 400 cubic yards of soil form the former gasoline LIST cavity. <br /> The excavation will be approximately 11 feet deep by w5 feet wide by 35 feet long. <br /> During excavation,the soil will be sampled and screened with an Organic Vapor Meter <br /> (OVM) to evaluate hydrocarbon concentrations in the soil. If the OVM screening <br /> indicates that the encavation has reached the lateral limits of hydrocarbon impact, a soil <br /> sample will bP collected and's=yorted to an onsite mobile laboratory for analyses_ Soil <br /> samples will be analyzed for total petroleum hydrocarbons as gasoline.(TPHg) and <br /> benzene,taluene, ethylbenzeae,and xylenes. <br /> SOI I Golden Foothill Porkwoy,Suite 7 •EI Domdo Hills.CA 95762•(916)939.2170• FAX(916)9S9-2172 <br /> P.O-Box 5283.Bokersileld-CA 93388 • (805)589-6983 • FAX(W5)589-1456 <br /> 22i02'd r>153fUW Sd3dOd Wd00c2T S6, 92 03a <br />