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' GROUNDWATER MONITORING WELL INSTALLATION WORKPLAN <br /> OCTOBER, 1994 <br /> Soil cuttings from the borings will be placed in DOT approved 55-gallon drums until evaluated to <br /> ' select appropriate disposition Disposal will be the responsibility of the facility operator All soil <br /> borings will be completed as monitoring wells <br /> ' 2.3 Soil Sampling <br /> Soil samples will be collected to the first occurrence of groundwater and will be collected at 5- <br /> foot intervals Groundwater has been measured at approximately 75-feet bgs <br /> Soil samples will be collected through the auger in three 6-inch long brass sleeves with a 2-inch <br /> diameter in a split-spoon sampler The sampler is driven ahead of the auger by a 140-pound <br /> hammer with a 30-inch drop The brass sleeves and sampler will be washed with an Alconox <br /> ' solution, and rinsed with deionized water prior to each use <br /> One brass sleeve containing soil from each interval will be capped, sealed, labeled in accordance <br /> ' with EPA protocol, recorded on a chain-of-custody (COC) form, placed in a cooler at 4 degrees <br /> centigrade or less, and transported to a California certified analytical laboratory for the specified <br /> analyses under COC documentation Another brass sleeve will be used for lithologic description <br /> All field data regarding lithology, recovery and blow counts will be recorded on boring logs <br /> y <br /> 2.4 Field Screening of Sail Samples <br /> ' One brass sleeve will be used for field screening of samples The material from the top tube will <br /> be placed in a sample jar to approximately 50% capacity, shaken and stored for a period of <br /> ' approximately five minutes A standard headspace reading will be collected at this time using a <br /> Foxboro organic vapor analyzer(OVA) or equivalent field instrumentation, and noted on the <br /> boring log <br /> ' 2.5 Sail Analyses <br /> ' Soil samples will be analyzed b) a California certified laboratory in accordance with state <br /> guidelines and EPA protocol The samples will be selectively analyzed for TPH quantitated <br /> ' against both gasoline and diesel standards and BTEX, using EPA methods 8015 and 8020, <br /> respectively It is anticipated that eight samples from each soil boring will be analyzed for TPH <br /> BTEX analyses will be conducted on any sample with a detectable concentration of TPH One <br /> ' sample from each boring, collected at the depth corresponding to the highest TPH concentration, <br /> may be analyzed for total lead, using EPA method 7421 <br /> 1 <br />