ARCHIVED REPORTS_XR0008917 - Laserfiche WebLink

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� � s 21 Permits - Prior to commencement of drilling, an approved well permit would be obtained from the San Joaquin County Public Health Services Environmental Health Division t (SJPHS). SJPHS will be notified 48 hours before any drilling or sampling begins 22 Underground Utilities - Underground Service Alert(USA)will be notified 48 hours before any subsurface work begins. 23 Site Safety Plan - Work would be performed under the guidelines presented in the BSK ' prepared Health and Safety Plan presented in Appendix A. 3.0 GROUNDWATER MONITORING WELLS INSTALLATION AND DEVELOPMENT A BSK & Associates geologist under direct supervision of a Registered Civil Engineer will be present during drilling, soil sampling and groundwater sampling. rThe locations of the proposed groundwater monironng wells (MW-5 and MW-6) are presented on Figure 2, Site Plan. Drilling will be accomplished with a Mobile Drill B-53 truck-mounted ng with 8-inch hollow stem auger Soil samples will be collected at IQ-foot intervals by driving a 14 I D. sampler 18 inches into relatively undisturbed soil The soil samples will be collected for the purpose of soil classification. Augers and dnii rods will be cleaned with a high-pressure, high-temperature cleaner before, between and after each bore hole. The equipment was washed in a polyethylene-lined containment basin. The rinsate from the auger wash will be placed into 55-gallon DOT 17 E/H drums and labeled. Soil cuttings will be placed upon and covered with 6-mil polyethylene sheeting Well construction materials would consist of 2-inch diameter schedule 40 PVC casing screen with flush threaded,joints Prior to installation, the PVC casing and screen would be washed with a ' high-pressure, high-temperature cleaner. The annular space around the slotted interval will be back-filled with washed, kiln-dned, graded #2112 sand The sand will be placed through the hollow stem auger to a level two feet above the slotted interval A three-foot layer of 1/4-inch tbentonite pellets will be placed above the sand pack and hydrated with potable water Neat cement will be placed above the bentonite pellet seal by the tremae method A water-tight, traffic-rated vault will be installed at surface grade at each well location The wells will be developed by surging, bailing and pumping until the water reaches a degree of clarity. The well construction details are presented on Figure 3, Monitoring Well Details. 4.0 ELEVATION SURVEY The relative elevations of the top of casing of the two additional wells and one existing well would be determined using a surveyor's level. The elevations of the wells would be referenced to a temporary benchmark. I 2 � &Associates