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i 4 After verify water depth, augers will be advanced a minimum Of 10 ' below groundwater, and 4", blank & slotted, flush screw- thread Sch. 40 PVC will be run to bottom. The bottom 20 , of pipe will consist of . 020" machine cut slots, the remainder will be blank The annular space between the slotted interval and hole will be filled with #2-12 clean sand poured in from the surface The sand is to extend a minimum of 5 ' above the top of the screen, it will be capped with 2-3 feet of bentonite The remaining annular space will be filled with a cement/bentonite slurryent/bentonite placed with a flexible hose and/or tremae pipe 5 The top of the casing will be fitted with a pre-formed Christie type box which will be thoroughly cemented in place The top of the casing will be fitted with a locking cap, and the box fitted with a bolt down traffic cover. 6 The preserved soil samples will be delivered to a State Certified laboratory with instructions to analyze for BETX, TPH as gasoline & diesel , bulk density, effective porosity, and organic carbon Depending upon those results, one or more samples will be analyzed for leaching potential using either the WET or TCLP procedure using de-ionized water Laboratory detection limits & QA/QC will conform to County & Tri-Regional requirements 7 Within 24-36 hours after completion of the well, it will be purged & sampled using San Joaquin Co approved procedures Water samples will be analyzed for BETX, TPHg, & TPHd using County & Tri-Regional detection limits and QA/QC methodology After analyzing all of the laboratory data from the soil & water samples, and report will be prepared and submitted to the County EHD f r iew and comment . W W J Hunter & Associates M A ri 3, 1997 c John Marcx f Garrison Law Corp. NO U0 OF 4