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KINDER�MORGAN <br /> SFPP,L.P. ^ File No. 29.57.01 <br /> Operating PwT whip u w/EC"d6 <br /> Mr. Mark W. Clardy,P.G. SEP 2 1 2006 <br /> California Regional Water Quality Control Board ENORONMENT HEALTH <br /> Central Valley Region <br /> 11020 Sun Center Drive, Suite 200 PERMt7/SERVICES <br /> ' Rancho Cordova, California 95670 <br /> ' Subject: Report of Remedial and Soil Sampling Activities Conducted in Response <br /> to the Transmix Pump Back-Pressure Valve Release at the SFPP <br /> Stockton Terminal,Stockton, California <br /> Dear Mr. Clardy: <br /> ' Kinder Morgan Energy Partners, LT through its operating partnership SFPP, L.P., presents the <br /> attached Report of Remedial and Soil Sampling Activities Conducted in Response to the Transmix <br /> Pump Back-Pressure Valve Release at the SFPP Stockton Terminal. LFR Inc. prepared this report <br /> for submittal to the Central Valley Regional Water Quality Control Board (RWQCB) on behalf of <br /> SFPP. <br /> ' On July 24, 2006, SFPP Operations personnel reported a transmix release (gasoline and diesel <br /> mixture)to the appropriate state, federal, and local authorities. Response activities including product <br /> removal, soil excavation,and soil/groundwater sampling are described in the attached report. <br /> Soil impacted from the release was removed to a maximum depth of approximately 3 feet below <br /> grade (fbg) where groundwater was encountered. The lateral extent of the investigation were <br /> determined through a combination of field meter readings and the locations of facility infrastructure <br /> ' (pipes, pump pads, and walls). Based on field observations, response activities resulted in the <br /> removal of the majority of impacted soil resulting from the July 24, 2006 release, in addition to soil <br /> impacted from historic operations at the facility. Sidewall confirmation sample results indicate that <br /> t residual soil contamination remains; however, this material is inaccessible given the infrastructure <br /> limitations of the manifold area and is limited in extent. Additionally, groundwater sampling from <br /> the base of the excavation indicated elevated hydrocarbon concentrations; however, these are not <br /> ' unexpected based on a review of our quarterly monitoring data and likely were present prior to the <br /> release. <br /> ' The remedial excavation has not been backfilled as of the date of this report. Within 45 days of <br /> submission of this report, SFPP will present a follow-up feasibility evaluation to review alternatives <br /> for residual hydrocarbon concentrations identified during response activities. Based on the fact that <br /> ' the depth of excavation will not increase (due to the presence of groundwater) and that the lateral <br /> limits of the excavation will not be extended (due to the infrastructure limitations), additional soil <br />