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July 24,2003 Ethylbenzene and xylene (less than 0 015 mg/kg reported in Borehole (BH) No C-3 as well as ethylbenzene and xylene (less than 0 065 mglkg reported in BH ' No C-5R) and contamination with heavier fractions (purgeable C6-C12) were found in soil between 25 and 40 FT bgs in BH Nos C-2 and C-416, ranging upwards to extractable petroleum hydrocarbons of 15,500 mg/kg at 25 FT bgs in ' BH No, C-5/7 Groundwater was sampled when encountered in the boreholes MW No 1 was ' sampled on December 20, 2000 and March 30, 2001 A detectable level of BTEX of 0 500 uglL was found in BH No C-416 Extractable hydrocarbons were identified in groundwater samples from BH Nos C-1, C-2, C-3, C-4, C-5 and MW-No 1 Ground water was sampled from the single monitoring well in December 2000, April 2001, January 2002, and April 2002 A survey of surrounding wells within 2000 FT of the subject release was updated in May 2002 from information gleaned from a similar survey for the Victor Fine Foods t protect (on file at the Central Valley Regional Water Quality Control Board), information furnished by the Department of Water Resources and field identification of possible well sites Reference ATTACHMENT 7, EXISTING AND HISTORICAL ' MONITOR WELL NETWORK AND LOCATION OF CURRENT RECOVERY WELLS- HARDING LAWSON ASSOCIATES- JANUARY 1990 Recent Activity Following resumption of monitoring in 2002, it became apparent that additional ' characterization of contamination both on and off site would be required After conditional approval by your office (EHD), six borings of which five were converted to cased monitoring wells were constructed by Woodward Drilling ' Company during June 6 and 7, 2002 Soil was sampled and classified by Stellar Environmental Solutions, Inc geologist Fred Hayden RG and Dan Barber PE Del-Tech Geotechnical Support Services developed the monitoring wells and ' continues to collect samples from MW Nos 1-6 for delivery to Sequoia Laboratory for analysis ' Well Top of Casing (TOC) elevations were established to 0 01 FT accuracy and related to the datum of the surrounding Victor Fine Foods ground water monitoring program by Daniel K Barber P E ' General Findings to Date ' Soil source areas with remaining diesel contamination have been identified One of the contamination zones may extend into the adjacent eastern parcel from the original UST excavation area Significant and economically feasible to remove ' contamination exists between MW Nos 1 and 2 near the site's eastern property line fence 1 Pg 2