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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Karl E. Longley,Scl) P.E.,Chair a <br /> Linda S.Adams 11020 Sun Center Drive#200,Rancho Cordova,California 956706114 Arnold <br /> Secretaryfor chwarzenegg <br /> r <br /> Environmental Phone(916)4aterbo •FAX(v/ce 4644645 nE /C- E nll,`LE,D Governor <br /> Protection http:Uwww.wa[erhoards.ca.gov/centralvalley II]�U( IILJ,• v uC <br /> NUV 1 S 2009 <br /> 16 November 2009 <br /> ENVIRONMENT HEALTH <br /> PERMITISERVICES <br /> Mr. Jeff Baker <br /> Tesoro Companies, Inc. <br /> 3450 South 344th Way, Suite 100 <br /> Auburn, WA 98001-5931 <br /> THIRD QUARTER 2009 SITE STATUS, GROUNDWATER MONITORING AND <br /> REMEDIAL SUMMARY REPORT, AND HELIUM TRACER STUDY FOR <br /> BIOSPARG/NG FEASIBILITY REPORT, STOCKTON TERMINALS TECHNICAL <br /> COMMITTEE FACILITIES, PORT OF STOCKTON, SAN JOAQUIN COUNTY <br /> Regional Water Quality Control Board, Central Valley Region (Central Valley Water <br /> Board) staff reviewed the 31 July 2009 Third Quarter 2009 Quarterly Site Status, <br /> Groundwater Monitoring and Remedial Summary Report (Third QMR) submitted on <br /> behalf of the Stockton Terminals Technical Committee (STTC) by Stantec Consulting <br /> Corporation (Stantec). Staff also reviewed British Petroleum's Helium Tracer Study for <br /> Biosparging Feasibility Report (Report) dated 29 October 2009. STTC is comprised of <br /> three bulk fuel facilities at the Port of Stockton (Site) including those owned and/or <br /> operated by British Petroleum (BP, formerly ARCO), Tesoro Petroleum Company Inc. <br /> (Tesoro), and Time Oil Company (TOC). <br /> Principal contaminants of concern (CDCs) at the Site include total petroleum <br /> hydrocarbons as gasoline (TPHg), TPH as diesel (TPHd), benzene, toluene, <br /> ethylbenzene, and xylenes (collectively BTEX), tertiary amyl methyl ether (TAME), <br /> methyl tertiary butyl ether (MTBE), and tertiary butyl alcohol (TBA). Methylene blue <br /> active substances (MBAS) have also been observed in groundwater after monitoring for <br /> this constituent began in March 2009 following a November 2008 release of fire <br /> suppression foam from the BP loading rack. <br /> The STTC conducts monitoring at the Site pursuant to Monitoring and Reporting <br /> Program (MRP) No. R5-2004-0823 and conducted groundwater monitoring for the third <br /> quarter of 2009 between 3 and 7 August 2009. Sediments underlying the Site are <br /> subdivided into four progressively deeper hydrostratigraphic units classified as the <br /> "A," "B," "C," and "D" Zones. During the third quarter, Stantec calculated that <br /> groundwater flowed toward the southeast in all the zones and the three upper zones <br /> had downward vertical gradients. <br /> Since 20 September 2002, the STTC has utilized SoakeaseTM separate phase <br /> hydrocarbon (SPH) removal socks in four wells to remove SPH. No measurable SPH <br /> or SPH sheen was observed in wells during the third quarter. <br /> California Environmental Protection Agency <br /> 0d Recycled Paper <br />