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June 16, 1997 Page 2 contained supreme, mid, and regular fuel grades These product facilities were removed in September 1995 The product facilities recently installed at the site include three double-walled fiberglass 12,000-gallon gasoline tanks, one 250-gallon above ground used oil tank, and two product islands (Figure 2) Area Business and Property Survey PACIFIC contracted with VISTA Information Solutions, Inc , (VISTA) for a search of nearby properties that may have site impact potential (VISTA, April 24, 1997) A copy of the VISTA map showing all listed sites located in the vicinity of the project site is included as Attachment B The nearest UST and leaking underground storage tank (LUST) site is the Kinser Shell Mini Mart located at 341 East Main Street, adjacent to the project site As shown on the attached VISTA report, four USTs (three gasoline, one used oil), are Iocated at Kinser Shell Mini Mart Additionally, two other UST and LUST properties were identified,Nestle Company Inc (0 9-miles west of the site, crossgradient) and Cal-Pacific Food Sales (0 11-miles east of the site, crossgradient) Well Survey .� PACIFIC conducted a records search at the California Department of Water Resources (DWR) in Sacramento, California(Attachment C), and identified a total of 39 wells located within a 112-mile radius of the site 4f these wells, the reported number and uses are 22 wells (groundwater monitoring), S wells (domestic), 3 wells (industrial), 2 wells (irrigation),2 wells (municipal), and 2 wells (reported with an unknown purpose) The nearest wells to the project site include 18 monitoring wells, of which 16 monitoring wells are located at the Nestles' Ripon Corporation, Inc facility directly west (crossgradient) of the site across Highway 99 The two remaining monitoring wells are located at 230 Industrial Avenue approximately 0 2-miles southwest (downgradient) from the site The nearest known murucipal well is located 0 4-miles northeast(upgradient) from the site The location of the closest domestic well downgradient to the site within the 1/2 mile radius of D WR records could not be determined given the insufficient information from the records Subsurface Conditions Soils beneath the site consisted primarily of silts Sand and silty sand interbeds were reported during previous investigation, and ranged in thickness from less than one foot to eight feet A poorly sorted sand was encountered beneath the silt unit at approximately 30 feet below ground surface (bgs) In the boring for Well MW-1, a clay was encountered from approximately 36-1/2 feet bgs to the total depth explored of 40 •; feet bgs Boring logs are presented as Attachment D 920I026A/CLOSERPT