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1 LEVINE-FRICKE 1 Two above ground storage tanks (one 1, 000-gallon capacity and one 1 500-gallon capacity) are located near the southwest corner of the Quonset hut. These contain diesel fuel used to fuel farm machinery, according to Mr. Ripkin. Agricultural Chemicals According to Mr. Ripkin, to his knowledge all agricultural chemi- cal applications at the Site have been performed aerially by D & D Flying of Robert's Island, and Ag Flight of Lodi, Califor- nia. D & D Flying is now out of business, but according to Mr. Tony DeLucca, the former owner of the firm, records are available on chemicals applied at the Site for the past three years. Records for 1988 indicate that the major crop grown for which agricultural chemicals were applied was alfalfa, and that FMC Furadan and Platte Diazinon, were applied at the Site for this crop through aerial spraying. Furadan is of the carbamate class of pesticides, and Diazinon is an organophosphate compound. According to Mr. DeLucca, most of the Site had been used for growing safflower, which did not require chemical- application. No records were found indicating fertilizer applications, as the County reportedly does not require maintenance of records on this type of chemical application (personal communication, Mr. Tony DeLucca, January 1989) . Information concerning agricultural chemicals applied by Ag Flight obtained from the San Joaquin County Agricultural Commis- sioner's office is summarized in Section 7. 1. Power Lanes Chemical herbicides are commonly used by public power utilities to control weeds beneath power lines. Pacific Gas & Electric was contacted to obtain information concerning weed control practices with respect to the power lines which transverse the southern border of the Site. Based on the information obtained from PG&E, (summarized in Section 7.1) , chemical weed control does not appear to have been practiced at this location. 1 No other sources of chemical use, storage, handling, spillage or disposal were identified during our review of the history of Site usage. J 6.0 RECONNAISSANCE INSPECTION OF SITE AND NEIGHBORING AREA On December 29, 1988, Mr. Scott Seyfried, a Levine•Fricke Geologist, conducted a walk-through .inspection of the Site and conducted an interview with the current owner of the Site property, Mr. Ripkin. The purposes of the inspection and -5-