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i <br /> r a i <br /> length. The soil samples will be labeled, packaged and stored in an insulated chest for transport <br /> under chain-of-custody manifest to a California Department of Health Services Environmental I <br /> Laboratory Accreditation Program (DHS-ELAP)-certified analytical laboratory. <br /> Soil samples will be labeled with the boring g#, depth, date, time, and initialed. For example B1 <br /> 1.5, where B 1 is the boring number and 1.5 is the sample depth in meters. <br /> .4.2.2 Grad Groundwater Sample Collection <br /> Following soil sampling activities, a HydropunchTM or equivalent system will be used to collect <br /> groundwater samples from a location adjacent to the Geoprobe° location (approximately one <br /> -meter Q feet). <br /> Discreet groundwater samples will be collected every 1.5 meters (5 feet). Depending on the <br /> I to groundwater and the lithological conditions all discreet groundwater sample intervals <br /> may or may not be collected. The following methods may be used for groundwater collection <br /> and these include the following. <br /> • A new disposable polyethylene or Teflon bailer; or <br /> • A stainless steel bailer. ' <br /> Upon completion of soil and grab groundwater sampling, the borings will be backfilled with an <br /> approximately 20:1 cement:bentonite grout. The grout will be placed within the borings from <br /> the bottom following removal of the groundwater sampling equipment. <br /> All drilling and sampling equipment will be washed prior to drilling. In addition, to minimize i <br /> cross-contamination between borings, all appropriate downhole drilling and sampling equipment <br /> will be washed between borings. Soil cuttings and wash water generated during the field <br /> investigation will be placed into 208-liter (55-gallon) drums approved by the United Nations for <br /> transport of liquid and solid wastes, stored in a secure area at the site, and disposed of, if <br /> necessary, under Task 4. <br /> I <br /> Groundwater samples will be labeled with the boring#, depth, date, time, and initialed. For <br /> j example B19— 1.5, where B19 is the boring number and 1.5 is the sample depth in meters. j <br /> The groundwater samples will be labeled, packaged, and stored in an insulated chest for transport <br /> under chain-of-custody manifest to a DHS-ELAP-certified analytical laboratory. <br /> 4.3 Laboratory Analysis <br /> Soil and groundwater samples will be submitted for a vertical contaminant extent profile. Up to <br /> 20 soil and 20 groundwater samples will be submitted for chemical analysis. The analyses will <br /> SarDP-N:Vanrfpl%ProjrrtA83%335276�wlyia&h5pu adiCPT-wkp.doc 4-2 <br /> 2141W <br />