ARCHIVED REPORTS_XR0007387 CASE 1

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k'q KLECNFELDER 3. BACKGROUND General Mills operates a food production facility located at 2000 West Turner Road in Lodi, California The facility includes food production preparation facilities, an office, fuel storage areas, silos, parking areas, etc , for food production purposes Kleinfelder previously reviewed pertinent documents and information related to the USTs on the site provided by General Mills Based on Kleinfelder's review of this Information, Kleinfelder understands the UST area discussed in this report is located south of the office and approximately 10 feet north of Building No 86 (See Plate 1) The two USTs were oriented north to south and situated side by side on an approximate 30 foot by 30- foot reinforced concrete pad At one time, reportedly, the two 10,000-gallon USTs contained diesel, kerosene and/or JP-4 tet fuel An unauthorized release report was prepared by county employee Mr William R iSnavely, dated January 14, 1988 This report indicated that a leak was discovered due to inventory discrepancies and that approximately 123 gallons of JP1 Fuel was estimated to have been released Comments in this release report stated the following "Manager discovered a discrepancy in Inventory and called ITT Tank Service to check system, leak in filler pipe observed, Stockton Service Station advised that the tank be removed, tank is being pumped out and to be empty 1/12188 " According to a previous EHD inspection report, a single 10,000-gallon fiberglass UST was removed from the site on January 29, 1988 Apparently the tank was removed due to an unauthorized release The tank removed was described in the inspection report as being the easternmost tank of two USTs located side by side to the north of a "new" building The bottom of the tank was at a depth of approximately 12 feet bgs and located on a large concrete pad Two bottom soil samples were collected at each end of the tank and at the ends of the concrete pad at approximate depths of 14 feet bgs Kleinfelder reviewed analytical data reports dated January 29, 1988 prepared by California Water Labs, Inc associated with these two samples The two soil samples were analyzed for total petroleum hydrocarbons as referenced to gasoline (TPH-G), diesel (TPH-D), kerosene (TPH-K), motor oil (TPH-MO), and benzene, toluene and xylenes (BTX) The northernmost soil sample was reported by the laboratory as "none detected" for the requested analyses at or above laboratory reporting limits TPH-K was the only analyte detected at 19 0 mg/kg from the soil sample collected from the southern end of the tank The General Mills facility utilized this UST and the previously removed UST for fuels used to nun the turbines in their food production process Kleinfelder understands that currently there is only one UST in place (western side of cement pad) and that the UST has been • emptied of all contents, a condition required before drilling could commence 28209 T09/ST05R132311DH Iv Page 3 of 12 ©2005, Kleinfelder, Inc October 21, 2005