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I 1 1. I Quarterly Report - First Quarter 2002 FERNANDO'S PLACE ' 1201 South Center Street, Stockton, California ' 1.0. INTRODUCTION At the request of Mr Roger Huckms, Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for the property located at 1201 South Center Street,Stockton,California(the site) The scope of work included conducting a ground water monitoring event for the five on-site montonng wells and preparation of this report The location of the site and the immediately ' surrounding area are illustrated on Figure 1, structures and monitoring well locations on the site are illustrated on Figure 2 20. BACKGROUND - According to Foothill Engineering's (FE) Work Plan - Phase 2 Site Investigation, 1201 S Center Street,Stockton, CA,dated 28 May 1999,two 500-gallon and one 8,500-gallon gasoline underground ' storage tanks (UST 1, UST 2 and UST 3, respectively) were removed from the site by Jim Thorpe Oil on 26 October 1994 Ten soil samples were analyzed from the excavation soil stockpile,the UST excavations and the product piping by GeoAnalytical Labs Each sample contained detectable concentrations of petroleum hydrocarbons FE reported that the highest concentrations were encountered near the west end of UST 3 (Figure 2) The excavation was backfilled to surface grade following sample collection On 28 A nl 1998, two soil Bonn s, PB 1 and MW,1, were advanced near the former UST 1 and p g ' UST 2 location and in the former UST 3 location,respectively Boring PB 1 was advanced to a depth of 30 feet below surface grade (bsg) for the collection of soil and ground water samples Analyzed samples contained total petroleum-hydrocarbons quantified as gasoline (TPH-g) at concentrations 1 as high as 14,100 milligrams per kilogram(mg/kg)in soil and 1,000,000 micrograms per liter(µg/1) in the`grab' ground water sample Soil samples collected from the pilot boring for MW-1 contained TPH-g and benzene, toluene, ethylbenzene and total xylenes (BTEX) to total depth of the boring - (50 feet bsg) The vertical extent ofhydrocarbon-impacted soil and groundwater was not determined ' at either location Four additional ground water monitoring wells, two shallow wells(MW-2B and MW-3B) and two ' deep wells(MW-2A and MW-3A),were installed by FE between 08 and 12 March 1999 Analyzed soil samples collected from monitoring well pilot borings MW-2A and MW-3A contained detectable ' concentrations of target analytes to total depths of both borings (120 feet bsg and 105 feet bsg, respectively) TPH-g was detected in soil samples collected at depths as great as 105 feet bsg and BTEX constituents to depths as great as 120 feet bsg Figure 2 illustrates former UST and monitoring ' well locations The vertical extent of hydrocarbon-impacted soil was not defined at either location Advanced GeoEnvironmental,Inc f F