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i <br /> L S 0 c 2003 FOOTHILL <br /> ENGINEERING <br /> 12793 PADDY CREEK LANE LCDI. CA 95240 <br /> P L�i E; Vi C E 5 PH. (209) 368-9381 FAX (209)367-1163 <br /> Harlin Knoll <br /> San Joaquin County Public Health Services February 4, 2003 <br /> Environmental Health Division <br /> 304 E Weber Ave. Third Floor <br /> Stockton, CA 95202 <br /> Subject: Sun West Liquors, 2449 W. Kettleman Lane, Lodi, CA LOP Site code: 503357 <br /> Global ID T0607700812 <br /> Dear Sir: <br /> Please find below a report on the groundwater sampling event of December 17,2002 for Sunwest <br /> Liquors. <br /> GROUNDWATER MONITORING REPORT FOR THE FOURTH QUARTER <br /> 12/17/2002 <br /> SUN WEST LIQUORS <br /> History <br /> On 7/10/1998 Thorpe Oil of Lodi, California removed the three gasoline USTs from the Sun West <br /> property. Soil samples from underneath the USTs and the dispenser piping indicated that some leaks had <br /> occurred during the life of the gasoline sales operation. Foothill Engineering did a site investigation to <br /> determine the vertical and horizontal extent of the gasoline contamination on 8/13/1998 and 812111998. <br /> Geomatrix installed the monitoring well GMX-1 at a location+1-25 feet south ofthe UST excavation and <br /> sampled first groundwater. That analysis is attached. Geomatrix also made three soil borings (GB#1, <br /> GB#2, and GB#3) with both soil samples and groundwater samples extracted (see attached map for <br /> location). All samples on GB#1, GB#2, and GB#3 were non-detect for all compounds analyzed. <br /> The work plan of 5/24199 called for the installation of three soil borings to be located on the Sun West <br /> Liquor property and the possible installation of a fourth soil boring on the south side ofKettleman Lane. <br /> Soil samples were to be extracted at predetermined depths for laboratory analysis. A monitoring well <br /> to sample ground water was to be constructed in each of the soil borings. <br /> Groundwater sampling quarterly events have occurred from 7112199 to 02/26/02. Laboratory data for all <br /> groundwater sampling analysis for each event is enclosed in a recap format(see attached recap). A copy <br /> of the complete Laboratory Certificate of Analysis is enclosed for only this sampling event. <br /> On January 28, 2002,ACT Inc. performed a pump test on a 15" extraction well with a 6" PVC casing. <br /> The report for this pump test has been supplied as part of a Final Remedial Plan. <br /> MONITORING WELL SAMPLE EVENT OF 12/10/02 FINDINGS AND RECOMMENDATIONS <br /> Sampling Procedure <br /> On December 17,2002,Del-Tech Geotechnical Services,under the supervision of Foothill Engineering <br /> 1 <br />