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10 ss <br /> be taken as well) placed on ice and delivered to the laboratory in <br /> sufficent time to complete analysis before expiration of allowable <br /> holding times. Each sample will be accompanied to the Laboratory, with <br /> the appropriate analysis Form and a Chain of Custody record. <br /> Sampling aperatus will be washed in a Trisodium Phosphate <br /> solution followed by steam cleaning following collection of each <br /> sample. <br /> Laboratory analysis will be run for the constituents listed on <br /> Form WASTEANAL for the waste material, and Form SOILANAL for the <br /> underlying soils. Sample preparation and analytical methods to be <br /> used are summarized on these Forms. <br /> Closure of the excavations will consist of placing a bentonite <br /> slurry at least 6 inches thick at the base of the excavation (if the <br /> excavation reaches within 6 inches of the base of the landfill) , or <br /> with bendonite pellets placed throughout the vibracored hole in order <br /> to provide an impermeable seal. The excavation will then be <br /> backfilled with the excavated bentonitic waste muds. <br /> In the unlikely instance that the above sampling plan is not <br /> applicable to the site conditions, county drilling permits will be <br /> obtained and a hollow stem auger will be employed for this sampling. <br /> - Off-Site - <br /> Figure 4 shows locations of previous off-site soil sampling. <br /> Site PS-7 is nominated as one of these sites in order to'verify <br /> previous sample results. In addition Sites CS-1 and CS-2 are <br /> nominated as new off-site soil sample locations. <br /> These samples will be taken at a depth of 6 feet from a backhokor Core) <br /> excavation. Field logs for each excavation will be made by a <br /> geologist, and field measurements will be taken for pH. Laboratory <br /> analysis will be run for the constituents and by the methods listed on <br /> Form SOILANAL. Samples will be collected using a stainless steel <br /> sampler, placed in a plastic sack and a sealed brass tube (for <br /> hydrocarbon analysis) , placed on ice and delivered to the laboratory <br /> accompanied with analysis Form SOILANAL and a Chain of Custody record. <br /> CE <br /> • <br /> CONWR ENVIRONMENTAL MMACAMUH COMPAM <br />