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F� Californiagegional Water Quality Cool Board ° <br /> Central Valley Region <br /> Karl E. Longley,SCD,P.E.,Chair <br /> Linda S.Adams Arnold <br /> 11020 Sun Center Drive#200,Rancho Cordova,California.9567Q-b3 r Schwarzold + <br /> Secreta o a gg <br /> Er�t�n-ornnenrQl Phone{916)464-3291 •FAX(916}4G4�G4$�-�i� l; �� <br /> http:llwww.waterboards,ca,gov/centralrl� Governor <br /> Prolecrion p <br /> DEC 3 0NVEINIT <br /> �40U <br /> 24 December 2008 F R0111+ SERVICES <br /> Mr. Jeffrey Cosgray Mr. Ken Yeo, Operations Area Manager <br /> Chevron Pipeline Company Kinder Morgan Energy Partners <br /> 4800 Fournace Place/E320C 2901 Bradshaw Road <br /> Bellaire, TX 77401-2324 Sacramento, CA 95827 <br /> FINDING OF REFINED PETROLEUM PRODUCT, MOUNTAIN HOUSE <br /> DEVELOPMENT SITE #4, BYRON ROAD, SAN JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Regional <br /> Water Board) staff oversee the investigation and cleanup of pollution from soil and <br /> groundwater. Staff in the Regional Water Board's Fresno office oversees Chevron <br /> Environmental Management Company's (Chevron's) investigation and cleanup of the <br /> Old Valley Pipeline (OVP), which carried crude oil from Bakersfield to Chevron's <br /> refinery in Richmond from the early 1900s to the 1970s. <br /> In November 2005, Chevron conducted soil and groundwater sampling at Mountain <br /> House Development Site #4 (MH Site #4), which is about 3,000 feet southeast of the <br /> intersection of Byron Road and Kelso Road about five miles northwest of Tracy in San <br /> Joaquin County. Chevron issued a soil and groundwater investigation report (Report) in <br /> May 2006. Based on the Report, the investigation found evidence of refined product in <br /> the groundwater. Specifically, grab groundwater sample MI-14-6 contained total <br /> petroleum hydrocarbons as gasoline (TPHg) at 2,400 micrograms per liter (pgIL) and <br /> TPH as diesel (TPHd) at 130,000 pg/L. <br /> As shown on the attached Figure 5 from the Report, there are two active petroleum <br /> pipelines in the vicinity of MH Site #4, the Chevron Pipeline Company (CPL) Bay Area <br /> Products Line and the Kinder Morgan Energy Partners (KMEP) pipeline. These <br /> pipelines both transport refined fuel, so both are possible sources of the TPHg and <br /> TPHd found in the groundwater. <br /> As a first step in identifying the source of the refined fuel in the groundwater, Regional <br /> Water Board staff request that CPL and KMEP check their respective pipeline integrity <br /> records to determine if there have been any leaks detected in their active pipelines in <br /> the vicinity of MH Site #4. If neither company has any record of leaks, Regional Water <br /> Board staff will request both companies to submit a soil and groundwater investigation <br /> work plan. <br /> California Environmental Protection Agency <br /> (d Recycled Paper <br />