SITE INFORMATION AND CORRESPONDENCE_FILE 1

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Toxic Technology, TT11nc. 3197-C Airport Loop Drive • Costa Mesa, California 92626 • (714) 668-1669 • FAX (714) 557-0353 August 15, 1991 L San Joaquin County ENViRONVEN iAL HEALTH Public Health Services PERM I i /SERVICE S Environmental Health Division 1601 East Hazelton Avenue P.O. Box 2009 Stockton, CA 95201 Attention: Ms. Eleanor Ratliff Subject: Dividend Development Company Tracy Site, North Parcel Dear Ms. Ratliff: Toxic Technology, Inc. (TTI) has completed soil and water testing of the North Parcel of the Dividend property in Tracy, California. The North Parcel is bounded by West Byron Road, Grant Line Road, and State Highway 205. Enclosed please find a copy of our report with addendum and a copy of our remediation workplan for approval. An isolated layer of residual diesel and crude oil has been identified at the West Byron Road property at MW-2, TPH concentration 4,200 ppm. No benzene was observed in the residual layer. The layer attenuates quickly with concentrations diminishing to 1,800 ppm at MW-3 and 220 ppm at MW-6. MW-3, MW-6, and MW-4 bracket MW-2 in a semi-circular pattern heading northward onto the Dividend property from the Southern Pacific pipeline easement parallelling West Byron Road. Negotiations with the Southern Pacific Pipeline Company (SPPC) to facilitate mitigation of the crude oil and diesel layer apparently discharged from the pipeline easement have been ongoing. The SPPC personnel, Mr. Tostengard and Mr. Ferrara, agree that crude oil and possibly other hydrocarbon product was, at times, pooled in the excavated easement in which the present pipeline was placed. The SPPC personnel contend that such pooled, free product was not considered hazardous when the SPPC pipeline was constructed and that presently, their pipeline shows no evidence of leakage.