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Ualiforni egional Water Quality Control Board <br /> Central Valley Region w <br /> Karl E. Longley,Scl),P.E.,Chair n1D <br /> Linda S.Adams <br /> Saryf11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Arnold <br /> Environmentecentor Phone(916)464-3291 •FAX(916)4644645 <br /> Environmental Protection 2009 Schwarzenegg <br /> http://www.wa[erboards.ca.gov/cenlralvalley MAR 1 S Governor <br /> ENVIRONMENT HEALTH <br /> 17 March 2009 PERMIT/SERVICES <br /> Mr. Sergio Morscalchi <br /> Atlantic Richfield Company <br /> Remediation Management, PO Box 1257 <br /> San Ramon, CA. 94583 <br /> NOVEMBER 2008 FIRE SUPPRESSION FOAM RELEASE, BRITISH PETROLEUM <br /> FACILITY, PORT OF STOCKTON, SAN JOAQUIN COUNTY <br /> Regional Water Quality Control Board, Central Valley Region (Regional Water Board) <br /> staff reviewed the 31 January 2009 Fourth Quarter 2008 & Annual Groundwater <br /> Monitoring, and Remedial Summary Report(Annual Report) submitted on behalf of the <br /> Stockton Terminals Technical Committee (STTC) by Stantec Consulting Corporation <br /> (Stantec). STTC is comprised of three bulk fuel facilities at the Port of Stockton (Site) <br /> including British Petroleum (BP) (formerly ARCO), Tesoro Petroleum Company Inc. <br /> (Tesoro), and Time Oil Company. <br /> Appendix O documents a 14,000-gallon release of fire suppression foam from the BP <br /> loading racks that occurred during a rainstorm on 1 November 2008. BP attempted to <br /> remove the foam by hosing it down into nearby sumps. Stantec reports that an unknown <br /> amount was washed away by the rain and absorbed by the soil at the site. BP pumped <br /> 15,000 gallons of the foam-water mixture to aboveground tank (AGT) No. 7. Up to an <br /> additional 40,000 gallons of the mixture was pumped into the secondary containment of <br /> the AGT area where it also eventually infiltrated into the subsurface. A review of the <br /> Materials Safety Data Sheet (MSDS) and laboratory analysis of the foam showed that it <br /> contains about 4,500 milligrams per liter (mg/L) of tertiary.butyl alcohol (TBA) and <br /> 24 mg/L of toluene. <br /> Groundwater monitoring for the fourth quarter was conducted about four days following <br /> the release of the fire suppression foam. Monitoring results showed increases of total <br /> petroleum hydrocarbons as gasoline (TPHg), TPH as diesel (TPHd), benzene, ethanol <br /> and TBA well beyond historical ranges. TBA had the most widespread and distinct <br /> concentration increases. The increases were most apparent in monitoring wells located <br /> in low areas at the southern property boundary and within the AGT secondary <br /> containment area. <br /> A second 500-gallon release of fire suppression foam occurred on 5 November 2008. <br /> This release was reportedly contained in the loading rack area and then transferred to <br /> AGT No. 7. <br /> California Environmental Protection Agency <br /> Q* Recycled Paper <br />