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penetrating the stratum. Drilling will be conducted under a C57 <br /> license using a hollow stem auger drill rig. <br /> The well will be constructed of 2 inch diameter F480 threaded PVC <br /> screen/casing. No glues or solvents will be used. Screen slot <br /> size will be 0.010 inch. Sand pack material will be No. 2/12 <br /> pre-washed silica sand. A minimum two foot bentonite seal will <br /> be placed prior to grouting with neat cement or a 1:1 cement-sand <br /> grout. Grout will be placed in the annulus using the tremmie <br /> method. Typical completion will be as shown on the attached <br /> figure. Actual completion depth will be determined in the field <br /> based on hydrogeologic conditions encountered. <br /> Drill cuttings will be logged continuously for characterization <br /> of contamination and soil type by an experienced staff geologist <br /> or civil engineer using the Unified Soil Classification System. <br /> Descriptions of soils encountered and monitoring well <br /> construction details will be recorded on boring/well logs and <br /> included within the assessment report. Soil samples will be <br /> collected from the boring at five foot intervals, beginning at a <br /> depth of five feet. The samples will be collected using a 2-inch <br /> diameter by 18-inch long split spoon sampler lined with 6-inch <br /> long thin-walled brass soil tubes. The sampler will be driven <br /> its entire length into undistrubed soil by a 140-pound drop or <br /> hydraulic hammer. <br /> Soils encountered will be monitored for organic vapors by placing <br /> a small amount of representative material in a sealed container, <br /> then measuring the concentration of volatiles collected in the <br /> head space with a photoionization detector (PID) calibrated to <br /> the benzene molecule, as well as using olfactory detection. The <br /> values obtained at each measurement point will be recorded on the <br /> boring logs. <br /> Soil cuttings generated during the drilling process will also be <br /> screened for the presence of volatile organics using the above <br /> methods. <br /> Soil samples submitted for analysis will be selected based on <br /> lithologic observations and obvious signs of contamination (i.e. <br /> PID readings, odors, and/or soil discoloration) . At a minimum, <br /> the sample collected immediately above the water table will be <br /> submitted for laboratory analysis. <br /> Samples will be collected, preserved, and transported under <br /> chain-of-custody in accordance with WaterWork' s Quality <br /> Assurance/Quality Control (QA/QC) Plan. Select samples will be <br /> analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX), <br /> total petroleum hydrocarbons as gasoline (TPHG) and total <br /> extractable lead (TEL) by EPA 8015/8020 and DHS/LUFT methods, <br /> respectively. Applied Analytical (CA certification No. 1211) <br /> will perform the analyses. <br /> Soil cuttings will be placed on and covered with 6 mil plastic <br /> on-site. Soil cuttings and groundwater will be properly disposed <br />