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I <br /> AfOHR-FRY Ranches <br /> 950 Industrial Dnve, Stockton, California June 2, 1993 <br /> Phase H Remedial Report Page: 5 <br /> I <br /> Borings into the saturated zone were terminated approximately 8 feet beneath <br /> the top of the aquifer in a clay to prevent penetration into a deeper aquifer. <br /> Upon termination, the boring into the saturated zone was completed as a <br />' momtonng well and backfilled with concrete grout, after a Bentonite seal had <br /> been placed. The boring for the monitoring well was of a diameter at least 4 <br /> inches greater than the 2 inch diameter of the well casing to be used. <br /> The cuttings from the drilling operation were containerized on-site during <br /> drilling for proper disposition. The proper method of disposal will be <br /> dependent upon results of laboratory analysis. This disposal wall be the <br /> responsibility of the client unless other arrangements have been made. <br /> 3.2 Well Construction <br /> All materials used in well construction were thoroughly cleaned prior to <br /> introduction into the boring. A Bentonite grout was placed at the bottom of the <br /> boring. After the seal was allowed to set long enough to support the weight of <br /> the casing, a 2 inch diameter well casing (PVC) with end cap and factory <br /> perforations for placement in the saturated zone was placed in the borang. The <br /> screen and filter pack sizes are as noted in the well construction drawing. The <br /> casing and end caps were threaded; no PVC cement was used. The filter pack <br /> extends two feet above the perforated zone. A Bentonite seal 2 to 3 feet thick <br /> was placed in the annular space above the filter pack followed by a cement <br /> grout to the surface. Seal and filter pack elevations may vary based on the <br /> underlying geology (Appendix Q. <br /> 3.3 Well Development and Sampling <br /> The wells were developed until the well water appeared clear of sediment, or <br /> until an appropriate number of well volumes (based upon the Judgment of the <br /> responsible professional) had been evacuated. The water produced during well <br /> development was containerized and left on-site in 55-gallon drums for disposal <br /> as hazardous waste if deemed necessary upon receipt of laboratory results. <br /> Disposal will be the responsibility of the client unless other arrangements have <br /> been made. The wells were allowed to stabilize for C,venty-four (24) hours <br /> I prior to sampling. <br /> I <br />