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U 5 D1 Color Spot, Inc. ! .Tune 28, 1991 (M88168G) the Leaking Underground Fuel Tank (LUFT) Field Manual, October 1989, consists of a leaching potential analysis based on specific site conditions. R copy of the work sheet from page 29 of the LUFT Fie'Ld Manual is included in Appendix C. The data for the subject site and their designated point values from the work sheet are; Data collected at the site suggest that the 5 points minimum depth to ground water is greater than 25 feet (depth to 1983 and 1986 seasonal high water table Is 50 feet, depth of soil sample is 14 feet) 3 Fractures in the subsurface are not probable 10 points Average annual precipitation is 16.27 inches* points No known man-made vertical conduits are nearby 10 points s (the nearest is a well about 400 feet away) 9 oints soils are composed of coarse- to medium-grained P ! wx, sands Total: 43 points $ * Data for Lodi from Clima ___ ical Data Annual Summary California 1989, National Oceanographic and Atmospheric Administration, volume 93, number 13. { i A rungs of total points between 41 and 48 corresponds to a maximum allowable toluene level of 0.3 ppm in soils left in place. Therefore, the ; concentration of 0.13 ppm of toluene in sample number 4 does not warrant further remediation site with respect is site assessment ocavat onsfor t nk and proc ductsupply lineends closure ofhremoval based on the ` to the subject ex worksheet on page 29 of the LUFT Field Manual. SGD also recommends that the soil (about 5 to 7 cubic yards) removed - rted te by a licensed from the second transporter to be ler irecycledon be rors di sp sed£ofl in an appropriate hazardous waste tr p and 9 should be used manner. The laboratory analysis of sample numbers 5, 7, 8, to of the so help describe the nature il contamination to the landfill or - recycling facility operators.