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Gealogi al7ahmcsInc Page S <br /> In Situ Remediation <br /> Pilot Test Work Pian <br /> Project No 507 2 <br /> June 10,2003 <br />' All non-disposable sampling equipment is decontaminated using a steam cleaner before and <br /> between uses Disposable gloves will be used by the technician to collect all samples and <br /> will be changed with each sampling event <br /> A chain of custody document, listing all samples collected, samples accompanies the les from <br /> p p <br /> field to laboratory, thereby providing a means to track their movement and insure their <br />' integrity <br /> All water purged from each monitoring well and not used as a sample, will be placed in a 55 <br /> gallon DOT approved container, properly labeled and stored on site <br />' The groundwater samples will be submitted to the laboratory for the analyses noted above <br /> in section 3 1 <br />' 3.2 Evaluate Chenveal Data <br /> The results of the chemical analyses will be provided to APT so they can develop an <br /> optimal infection mixture of hydroxyl radicals and if necessary, nutrients <br /> (nitrates/phosphates) to stimulate bacteria growth and resulting biodegradation <br />' 33 Borehole/Monitoring Well Installation <br /> Three borings will be installed by utilizing a GeoProbe® direct push (DP) ng The <br /> boreholes will have a diameter of approximately 2 5 inches and will be completed with <br /> small diameter well casings (1" PVC) to act as monitoring points The boreholes (GP-1, <br /> GP-2 and GP-3) will be installed approximately 1, 2 and 3 feet down gradient (northeast) of <br /> existing well MW-9, respectively (see Figure 9 for borehole locations) <br />' GP-1 through GP-3 will be advanced using a direct push ng owned and operated by V&W <br /> Drilling of Isleton, CA (C57# 720904) A professional geologist under the supervision of a <br /> licensed registered geologist will supervise all drilling, sampling, and well construction <br />' The monitoring wells will be constructed using 1-inch diameter PVC casings with flush <br /> threads The wells will be secured with a watertight cap encased in flush mounted traffic <br /> rated well boxes The table below shows the proposed well construction (see Figure 9) <br /> Well No. Dia./TD Screen Slot Sand Pack Trans. Seal Grout Seal <br />' GP-1 111130' 20-30' 0010" #12 sand 19-30' 16-19' 16'-surface <br /> GP-2 1"130' 20-30' 0010" #12 sand 19-30' 16-19' 16'-surface <br /> GP-3 1"/30' 20-30' 0 010" #12 sand 19-30' 16-19' 16'-surface <br />