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BI; Brown and Caldwell Consultants 723 S Street Li :+ s Sacramento a IJCaldamia 95814- s.F: (916)M4-0123 70 OCT 0 8 1992 FAX(4i 6)444-8437 ENVIR9NMENTAL HEALTH September 3, 1992 PERMIT/SERVICES Mr. Salvatore Trinchera California Cedar Products Company Post Office Box 8440 Stockton, California 95208 017-7046-01/1 Subject: Transmittal of laboratory Results of Soil Samples Collected During the Lockeford Facility Tank Removal Dear Mr. Trinchera: Brown and Caldwell is pleased to present the results from the August 26, 1992; tank removals at California Cedar's Lockeford. Cal f'omia A total of three 10;000-gallon underground storage tanks that had stored diesel fuel were removed. The work was completed as described in the July 28, 1992, work.elan_ �.�itl: the exception that soil samples were analyzed at Excelchem Environmental' Lacs, a California Department of Health Services certified Laboratory instead of at WEST.L,abs.. 'Ile work plan is attached in Appendix A. During the tank removal the Mokela'rone Fire, District and .the San Joaquin County Environmental Health Division had represisntatives on-site to. observe the activity. Both agencies had reviewed and approved the work.plahn prior to initiation of fieldwork. Figure 1 presents a'sketch of the tank excavation, tank locations and sample locations. Table 1 summarizes laboratory results. Copies of the laboratory reports are presented in Appendix B. Appendix C presents copies of the Urpform Hazardous Waste Manifests used to manifest the tanks in transport to the disposal facility.. . Results Detectable concentrations of hydrocarbons were identified in the stockpile and in two samples collected from beneath the tanks. The stockpile samples will be used to assess disposal options for the stockpile. Final recommendations for disposal of the stockpile will be presented under separate cover. The two samples with detectable levels of hydrocarbons that were collected from beneath the tanks contained xylene in concentrations slightly higher than the detection limit but well below an unofficial but typical action level in California for xylene in soil of 1 part per million (ppm). However, sample T-2-1 @ 14 contained concentrations of total petroleum hydrocarbons-diesel (TPH-D)of 3,100 ppm. Although no action levels have been established for TPH-D by the State of California, that portion of the excavation will be required to be remediated by the County of San Joaquin Health Department. 7046\C0RRWP,704&01.1r t