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Industrial Compliance <br /> J01d Placerville Road Suite 100 Sacramento, CA 95827-3559 <br /> 916/369-8971 FAX 916/369-8370 <br /> November 9, 1995 <br /> IC Project No. 05100469 <br /> Mr. Joel Weiss <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827-3098 <br /> Re: Request to Terminate Excavation of Lead-Impacted Soil <br /> Areas A, B, C and D <br /> Southern Pacific Transportation Company <br /> Old Tracy Yard - Tracy, California <br /> Dear Mr. Weiss: <br /> Industrial Compliance (IC) is submitting this letter on behalf of Southern Pacific <br /> Transportation Company (SPTCo) to request regulatory approval to terminate excavation of <br /> lead-impacted soil from excavation areas A, B, C and D at the SPTCo Old Tracy Yard in <br /> Tracy, California. The general location and configuration of the four areas in question as <br /> well as all other areas of excavation within the subject site are shown on the attached sketch <br /> map. The following paragraphs provide the rationale for and data supporting the termination <br /> of excavation. <br /> Excavation of lead-impacted soil at the Old Tracy Yard site is being conducted by IC on <br /> behalf of SPTCo pursuant to an agreement between SPTCo, the California Regional Water <br /> Quality Control Board - Central Valley Region (Regional Board) and the California <br /> Environmental Protection Agency - Department of Toxic Substances Control (DTSC) <br /> regarding cleanup levels for lead in soil at the site. Subsequent to sale by SPTCo, residential <br /> development is planned for the site. Cleanup levels for lead in soil at the site, agreed to by <br /> the above parties, are 220 milligrams per kilogram (mg/kg) total lead and 0.015 milligrams <br /> per liter (mg/L) soluble lead as determined by the California Waste Extraction Test (WET) <br /> using deionized water as the extraction medium. <br /> Excavation of lead-impacted soil was initiated at the site on July 11, 1995. Excavation areas <br /> A, B, C, and D, which are located within a narrow strip of land between the Southern <br /> Pacific tracks and 6th Street (see attached figure), were excavated and confirmation samples <br /> collected on July 17, 1995. Areas A, B, C, and D were only excavated to a depth of 1 foot <br /> based on site characterization sample results. Individual soil confirmation samples for total <br /> lead were composited from each sidewall and the floor of each excavation. In general, <br /> sidewall samples were composited from three locations at mid-depth along each sidewall. <br /> 469-015.Itr/11-09-95/u/kwrigh/keydata/oldtracv/letters <br /> Denver•Phoenix•Kansas City•Dallas•Houston• Los Angeles•Sacramento•Little Rock• Knoxville <br /> Aoik <br /> A Subsidiary of SP Environmental Systems.Inc. Rmw <br />