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Depar menf of Toxic Sublstances: - <br /> •�� Control,... <br /> Edwin F!-L'owry, Director <br /> . 0151 ,Crpy06n':Wa: y:, uite-3: <br /> I Sacra' <br /> menfo Californ' <br /> is <br /> iNinston H. Hickoz. 95827-21:06 <br /> agency Secretary Gray Da-is <br /> ,,giifornia Environrnerita! 'Governor <br /> i Protection Agency fl�'fECE1.VED <br /> t Chevron FnnmgrtpntaLMgriit Co, <br /> April 27, 2000 <br /> . i <br /> MAY 0, 1 `2000 <br /> K <br /> H. <br /> f Ms. Katie Hower <br /> t Chevron Environmental Manag.ement'Company <br /> 6001 Bollinger Canyon Road <br /> San Ramon, Galiforrtia 94583 <br /> REVIEW OF "SOIL AND GROUNDWATER,1NVESTIGTiON AND SCREENING <br /> { HEALTH RISK ASSESSMENT OE THE:OLD,; VALLEY I�IPELINE RIGHT oF-7W ". <br /> POMBO RRQPERTY` <br /> f Dear Ms Hower: <br /> The Department of-Toxic Substances Control;(DTSC) has completed-its review of the, <br /> l.� subject report far thePpelme right=of way, 'Pornbo,pr=operty, prepared:b`y Geomatrix: <br /> Consultants,and submitted by Chevron. -'The former pipeline transported heavy <br /> petroleum (crude and;fuel oil) from Bakersfield to R ohmond, California, from the early I <br /> { I 900s to th'e '1950s. This report,documents the hazardous substance characterization <br /> of soil and groundwater at t re site,. The:Purpose of-the characterization was to gather <br /> data to assess the lateral and vertical extent of:-petroleum hydrocarbon affected.soil <br /> along the pipeline right-of--way, to:evaluate grbundwa'ter quaIity rand"to evaluate <br /> Potential-human health risks ,posed by residual petroleurn hydrocarbons. The Site is, <br /> proposed,for a change of land'use for unrestricted use. <br /> The subject,report was reviewed by Mr. David L Berry, Rh 'D t,..QTS Staff Toxi ologi5t <br /> i (see internal merilorandum�dated'March 14, 2000). DTSC concurs-that the analytical <br /> data su f <br /> ,porting this investigation appearz equate in both quantity anti quality The <br />_ ► residual levels of petroleum related hydrocarbons in_ the soils at.the ite are helow <br /> levels that would constitute,an unacceptable risk to human health and'th'e. <br /> environment As with any real property ff previously unidentified contamina#ion is <br /> discovered at the Site; additional assessmen#, investigatio.n;"andlor remediation may be required: <br /> Fftrrri�a6niE ,- <br /> -1 <br /> I <br /> I <br />