ARCHIVED REPORTS XR0007793 - Laserfiche WebLink

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aluminum foil,capped with a polyethylene lid, and sealed with electrical tape The samples will then be properly labeled, showing the boring number and depth of collection, date,time, sampler's name, and preservation Soil samples will be individually placed in zip-lock bags and immediately refrigerated in an ice chest ' containing frozen blue ice The samples will be maintained in a refrigerated condition until they are delivered to the analytical laboratory for analyses Chain-of-custody documentation will be maintained from the sampling location to the analytical ' laboratory The chain-of-custody will be signed by the sampler and placed in the container holding the samples Condition of the samples will be noted on the chain- of-custody document by the laboratory • Soil cuttings generated during well bore drilling and sampling will be placed on and completely covered with plastic sheeting in a secure area of the Site Figure 8 illustrates the drill cutting storage area It is anticipated that approximately 5 to 10 cubic yards of drill cuttings may be generated Upon receipt of the laboratory analyses,the drill cuttings will be transported offsite and either disposed or recycled within 90 days of accumulation date and will be the responsibility of the Owner • Duplicate soil samples will be collected at the rate of one duplicate soil sample for every 10 soil samples collected, or one duplicate sample for every day of sampling ' 0 The bottom of each well bore will be drilled to 10 feet below uppermost groundwater encountered during borehole drilling • Well casing will be 2-inch-diameter Schedule 40 Polyvinyl Chloride(PVC) thermoplastic flush-threaded blank and perforated casing The casing string will be fitted with screw-on bottom caps and locking top caps No solvents or adhesives will ' be used to assemble the casing string Perforated casing will be installed from the bottom of each well boring to approximately 5 feet above groundwater encountered during borehole drilling • Perforated casing will be factory slotted with 0 020 inch slots • The annular space around the perforated well casing will be packed with clean graded sand from the bottom of the boring to 2 feet above the perforated casing • Each well surface seal will be constructed with a minimum of l foot of bentonite 1 pellets above the sand pack, followed by 2-sack neat cement and sand slurry mix to the surface • The well heads will be secured with a water-tight, locking well cap encased in a traffic rated surface vault • WeIl identification information will be affixed to each well cap • Well construction will be permitted and inspected by the LIA 3.1.4 WELL DEVELOPMENT Each monitoring well will be developed using a vented surge block to stabilize the sand filter and clear the well of fine material Well development operations will begin a minimum 24 hours ' following well completion Development will continue until sediment entering the well through the 366-002 -7-