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KLEINFELDER <br /> ' 1 <br /> equilibrate for 5 to 15 minutes, and scanning the headspace of the lar for volatiles The <br /> vapor reading is noted as the field screening result. <br /> For the protection of the drilling crew, the PID is also used to measure the volatile <br /> concentrations in the breathing zone prior to and during the drilling of the samples Total <br /> ionizable hydrocarbon readings in excess of 5 ppmv will necessitate respiratory protection <br /> ' for the affected crew members A complete field health and safety plan is developed for the <br /> project prior to the start of field work. <br /> i <br /> SOIL BORING CLOSURE <br /> ' Sod borings not to be completed as ground water monitoring wells are closed immediately <br /> after the collection and logging of the soil samples <br /> Closure is by tremae grouting the boring with a cement/bentonite slurry or as otherwise <br /> ' required. The closing of any soil boring often must be inspected by the a local health <br /> department official <br /> SOIL SAMPLE SELECTION FOR LABORATORY ANALYSIS <br /> The selection of soil samples for laboratory analysis is based upon 1) qualitative Meld <br /> screening performed in the field using the PID, 2) field observations such as odor, <br /> ' discoloration, or high moisture content, and 3) project requirements Generally, samples <br /> are submitted from the bottom of the boring and from soil horizons with significant <br /> ' potential for contarrunation as indicated by the PID, observations, and site history <br /> ' MONITORING WELL CONSTRUCTION <br /> ' Construction details for shallow ground water monitoring wells are as follows <br /> o The well casing will be 2-inch or 4-inch inside diameter, flush-threaded joint, <br /> ' schedule 40 PVC pipe <br /> ' o The wells will be constructed in 8- or 10-inch diameter boreholes <br /> ' 145-88-2013 <br />