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0 <br /> California Regional Water Quality ualit C*trol Board <br /> Central Valley Region <br /> Terry Tamminen Robert Schneider,Chair Arnold Schwarzenegger <br /> Secretary for Governor <br /> Environmental Sacramento Main Office <br /> Protection Internet Address:http://www.swrcb.ca.gov/rwgcb5 --n i <br /> 11020 Sun Center Drive#200 Rancho Cordova,CA 95670-6114 ��n <br /> Phone(916)464-3291 •Fax (916)464-4797 <br /> DSC 2 � 2003 <br /> 22 December 2003 ��P�R�1111SERv1G�S <br /> Mr. Mike Pitta <br /> Kinder Morgan Energy Partners <br /> 1100 Town and Country Road <br /> Orange, California 92868 <br /> PHYTOREMEDL4 TION AND BIOREMEDIA TION REMEDIAL MEASURES, <br /> KINDER MORGAN ENERGY PARTNERS, HOLT PIPELINE RELEASE SITE, <br /> SAN JOAQUIN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board (Regional Board)have <br /> reviewed the 3 July 2003 Bioremediation Pilot Study in Lieu of Continued Pump and Treat <br /> (Bioremediation Work Plan), the 31 July 2003 First Semiannual 2003 Groundwater Monitoring <br /> Report(GMR) and the 18 September 2003 Phytoremediation as the Final Measure for the <br /> Source Area (Phytoremediation Work Plan) submitted by CH2M Hill on behalf of Kinder <br /> Morgan Energy Partners, L.P.,through its operating partner SFPP, L.P. (KMEP) for the Holt <br /> Pipeline Release Site in Holt, San Joaquin County(site). <br /> The GMR reported that during the sampling event conducted on 3 June 2003, monitoring well <br /> N-15, near the release area contained 2,400 µg/1 of benzene and 5,200 µg/1 of total petroleum <br /> hydrocarbon in the gasoline range (TPHg). Monitoring well N-7 in the source area contained <br /> 9,100 µg/1 of benzene and 31,200 µg/1 of TPHg. A large portion of the source area mass <br /> remaining in groundwater is bound within fine-grained material and a peat soil lens that slowly <br /> releases pollutants. The highest concentration of dissolved pollution southeast of Whiskey <br /> Slough Road is at monitoring well N-17 having 330 µg/1 of benzene and 1,100 µg/1 of TPHg. <br /> The pollutant plume is monitored by two downgradient wells,N-18 and N-19 that remain <br /> non-detect for the constituents of concern. <br /> KMEP has conducted groundwater pump and treat and soil vapor extraction at the site in order to <br /> remediate a 1986 petroleum pipeline release. These actions have removed a large quantity of <br /> pollution from the groundwater. However, pollution remains and the existing remedial measures <br /> may not continue to be the optimal strategy. KMEP proposes to conduct a bioremediation pilot <br /> study southeast of Whiskey Slough Road at the downgradient portion of the pollutant plume, and <br /> implement phytoremediation in the source area. Our 20 February 2003 meeting summary letter <br /> stated, "During the meeting, we also discussed site characterization and remedial options... we <br /> concurred with your recommendation to submit a technical memo that ... proposes <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />