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1 ' <br /> All of the borings were drilled with a truck mounted drill <br /> j rig using 7„5-inch O.D.f (outside diameter) hollow stem augers. <br /> The drilling was performed under the supervision of a <br /> geolqist <br /> who also maintained a con•,inuous log of the materials encountered <br /> i. (See Appendix I, Drill Logs). <br /> CSOIL SAMPLING <br /> Soil samPlAs were obtained at 5 foot intervals from 3.5 Feet <br /> below grade to the bottom of the borings. Dr.=-les warp obta;ncrz <br /> during drilling using a 2.5 inch O.D. split spoon sampler Lined <br /> With three 2 x 6 inch brass sample tubes and was driven 18-inches <br /> ahead of the augers at each sample point. The collected samples <br /> i. were sealed, napped andack <br /> P ed on ice in an insulated cooler for <br /> subsequent storage at Groundwater Techn <br /> abcied with the boring number, sample number and <br /> ch sample was <br /> epth of <br /> sample. Soil sampling was conducted in accordance dwith Ground-- <br /> water Technology's Standard Operating Procedures SOP 11,14 and <br /> 15 (See Appendix II). <br /> MONITORING W8LL I?35TALI.i4,TION <br /> - Three monitoringwells s were installed in the existing soil <br /> f <br /> borings to provide access to the groundwater for future moni- <br /> toring and sampling. The wells were constructed of two in <br /> ch <br /> diameter 0.020 inch machine slotted FVC well screen and blank <br /> casing The well screen was installed from the bottom of the <br /> boring to ten feet below grade and blank casing was installed to <br /> the surface. A well pack consisting of washed #2 Monterey sand <br /> i was placed In the annulus from the bottom of the boring to 9 feet <br /> below grade. The wells were completed with a bentonite seal, <br /> cement, and a traffic rated street box to provide access to the <br /> I, well (See Appendix I for well construction details). <br /> 5 <br />