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De,BOcr Truck Lines, Inc. <br /> 201 West Sth Street, Ripon, California <br /> Phase I Report of Findings September 9, 1.99,;4 <br /> Page; '13 <br /> i <br /> threaded; no PVC cement was used. The filter pack extended two feet above the <br /> perforated zone. A Bentonite seal 27 to 3-feet thick was placed in the annular <br /> space above the filter pack followed by a neat cement grout to the surface. <br /> Locking well caps and traffic boxes were installed on each well. <br /> �-' 3.3 Well Development and Sampling <br /> i <br /> The wells were developed until the well water appeared clear of sediment, or until <br /> an appropriate number of well volumes (based upon the judgment of the <br /> responsible professional) had been evacuated (Appendix D). The water produced <br /> during well development was containerized and Ieft on-site in 55-gallon drums, or, <br /> in other suitable containers, for disposal as hazardous waste if deemed necessary' <br /> upon receipt of laboratory results. Disposal will be the responsibility of the client° <br /> unless other arrangements have been made. The wells were allowed to stabilize;. <br /> for twenty-four(24) hours prior to sampling. <br /> it <br /> All soil and groundwater samples were properly labeled with date collected," <br /> project number, sample coordinator, and sample identification. Field records 1 <br /> j., document the above information and other significant data, such as names of on-S <br /> site personnel, sampling methods, date and time of sampling, the number of well <br /> volumes removed before sampling, preservatives added and any filtration <br /> performed on samples. <br /> The samples were refrigerated immediately for delivery to the laboratory and were <br /> under no circumstances opened by anyone other than laboratory personnel. Chain <br /> , of Custody records were maintained at all times (Appendix A& B). <br /> 3.4 Soil Sampling <br /> All soil sampling equipment was thoroughly steam-cleaned before and between <br /> sampling to prevent cross contamination. Relatively undisturbed soil samples were <br /> taken at five foot intervals from 5 to 25 feet in order to evaluate the subsurface ;i <br /> materials. <br /> i� <br /> ii <br /> The soil samples were taken using a California Modified Split Spoon sampler with <br /> brass liners. The wireline sampler was driven continuously by overdrilling, <br /> a r <br /> The laboratory samples did not have head space and were immediately sealed in ii <br /> their liners using aluminum foil lined plastic caps. The remaining samples were <br /> removed from their liners and used as an aide to the on-site geologist in logging <br /> the material at that depth. <br /> i <br /> i <br /> .I <br />