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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Katherine Hart, Chair <br /> 11020 Sun Center Drive#200, Rancho Cordova,California 95670-6114 Edmund G.Brown Jr. <br /> Linda S.Adams Phone(916)464-3291 •FAX(916)464-4645 <br /> Acting Secretary for http://wwI.waterboards.ca.gov/centralvalley Governor <br /> Environmental Protection <br /> FROM: Gerald Djuth <br /> TO: Antonia K. J. Vorster Private Site Cleanup Unit <br /> Site and Groundwater Cleanup <br /> Program Manager <br /> SIGNATURE: � ✓' w�/��%-, % 1 ,., <br /> J <br /> Dunc n Austin <br /> DATE: 8 March 2011 Chie , rivate Site Cie up Unit <br /> SIGNATURE: <br /> SUBJECT: RATIONALE FOR CONSIDERING NO DIESELFURTHER <br /> ACTION ON UNION- <br /> PACIFIC RAILROAD STO <br /> ILL <br /> Rationale: Union Pacific Railroad (UPRR) diesel fuel (TPHd) aesexcavated all dulti�g fbom atlocomotive <br /> drop inlet/culvert structure to remove spilled <br /> collision. <br /> Issues: Stormwater runoff from the spill area continues to contain about 2 mg/I of TPH in the <br /> diesel and motor oil range. Similar concentrations of TPH were detected in stormwater <br /> from 12 other culvert outflows in areas north of the spill. The residual pollution likely is due <br /> to either widespread TPH contamination resulting from historical operations or from a <br /> product UPRR used for dust control called Dustec. Dustec is made from wood pulp and <br /> contains lignans which are detected in the EPA 8015B analytical method used for TPH. <br /> Although the TPHd concentration exceeds the secondary MCL for diesel of 100 ug/I, none <br /> of the samples exceeded the U.S. EPA Multth eUS EPA uctor inder the NPDESt value of 15 /Iprogram to <br /> for oil and <br /> grease. The Multi-Sector Permit is used by <br /> regulate stormwater discharge associated with industrial activity. <br /> Setting: The UPRR yard in Stockton (Fig. 1). UPRR collects and treats storm water from the <br /> northern section of the yard that includes the maintenance and refueling facilities. The <br /> collision occurred in the southern part of the yard, away from the storm water treatment <br /> system. <br /> Source: Fuel spilled from a locomotive collision on 30 August 2003. <br /> Actions: <br /> On 30 August 2003 two locomotives collided resulting in a spill of estimated 2,300 <br /> gallons of diesel fuel near Switch 014 (Fig. 3) and storm water outfall SW-3. <br /> California Environmental Protection Agency <br /> ZaRecycled Paper <br />