ARCHIVED REPORTS XR0001641 - Laserfiche WebLink

Home Browse Search

1.0 INTRODUCTION As per Cleanup and Abatement Order No. 90-702, issued by the ' Regional Water Quality Control Board, Central Valley Region (CRWQCB) , SUN TECH ENVIRONMENTAL, INC. (SUN TECH) , has performed Quarterly Monitoring for Mr. Jeff Werner, at the Geweke Land Development and Marketing (GLDM) property, ' located at 16 South Cherokee Lane, Lodi, California. This Quarterly Groundwater Monitoring Report has been ' prepared by SUN TECH, as required by the San Joaquin County Public Health Services, Environmental Health Division (SJEHD) . ' This report outlines the results of the groundwater sampling performed by SUN TECH on December 31, 1992 at the above mentioned site. ' 1.1 SITE DESCRIPTION The subject property located at 16 South Cherokee Lane, Lodi, California, was once the site of a Gas-N-Save service ' station, but is currently the location of the Geweke Car Capitol, a used car dealership (Figures 1 and 2 ) . ' 1.2 PREVIOUS WORK One 11000 gallon waste oil tank, and two 10,000 gallon, and one 6 ,000 gallon fuel storage tanks were removed from the subject property in 1985. As required by the SJEHD, a subsurface site investigation was initiated at the subject property in 1985. Kleinfelder and Associates were retained to perform the investigation, and four monitoring wells were installed (MW-1, 2, 3 and 4 ) to assess the subsurface conditions at the site (Figure 2) . The results of the investigation indicated that petroleum hydrocarbons were present in subsurface soils (concentration up to 214 . 5 parts per million [ppm] TPH-Gasoline [TPH-G] , ' 7.67 ppm Benzene, 37 . 9 ppm Toluene, 29 . 9 ppm Ethylbenzene, and 11 ppm Xylenes) as well as groundwater (concentrations up to 46. 2 ppm TPH-G, 0. 74 ppm Benzene, 0 . 624 ppm Toluene, and 1. 75 ppm Xylenes) . ' In February 1986, Brown and Caldwell (BC) , were retained by GLDM to further define the vertical and lateral extent of hydrocarbon contamination at the site. Five soil borings ' were drilled at this time (GL-1 through GL-5 ) . Petroleum hydrocarbons were not detected in GL-1 and GL-4 , however, low concentrations of hydrocarbon contamination was encountered in GL-5 (<25 ppm TPH-G, and <2 ppm Benzene, Toluene, Ethylbenzene, and Xylene) . Higher levels of hydrocarbon contamination was encountered in GL-2 and GL-3 (up to 240 ppm TPH-G, up to 10 ppm toluene, and up to 32 ppm xylenes) . (See Figure 2 for boring locations ) . In July 1986, BC installed monitoring well 5 (MW-5) . Petroleum hydrocarbons were detected in the soil ' (concentrations up to 1 , 100 ppm TPH-G, 17 ppm Benzene, 36 ppm STE Project No. 4001 Page 1