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B: \WPLATEXT.DOC <br /> sleeve containing the soil sample with the highest PID reading is <br /> • immediately preserved and labeled. <br /> i <br /> SAMPLE PRESERVATION. <br /> Each sample is preserved by wrapping the sleeve ends with aluminum <br /> foil and then capping them with plastic caps which are secured to <br /> the sleeve with duct tape . Each sleeve is labeled with the time , <br /> date, hole number , depth , analyses to be run, site name and <br /> initials of the geologist. Each sample is then placed in a zip <br /> lock bag and deposited in an ice chest containing enough ice to <br /> preserve the samples at 40C for chain-of-custody delivery to a <br /> California State Certified Laboratory. <br /> ANALYTICAL METHODS AND DHS LABORATORY SELECTED. <br /> WEGE has contracted MATRIX ENVIRONMENTAL LABORATORIES INC. (DHS <br /> #359 ) . 3017 Kilgore Road #100 , Rancho Cordova, CA 95742 ( 916 ) 635- <br /> 3962 to perform the analysis of the soil and ground water samples . <br /> MATRIX will analyze these samples for Total Petroleum Hydrocarbons <br /> as gasoline w/ BTEX Distinction, utilizing EPA Method 8015 (GCFID) <br /> with 5030 extraction and EPA Method 8020 as described on page 17 , <br /> Table 2 of the TRI-REGIONAL BOARD STAFF RECOMMENDATIONS FOR <br /> PRELIMINARY EVALUATION AND INVESTIGATION OF UNDERGROUND TANK <br /> SITES , 10 AUGUST 1990 . Previous samples obtained from the <br /> overexcavation of the UST's excavation were below detection limits <br /> for organic lead and ethylene dibromide, these analysis will not <br /> be performed. <br /> Detection limits for soil ; TPH G 1 .0 ppm, BTEX 0 .005 ppm. <br /> for water; TPH G 50 ppb. BTEX 50 ppb. <br /> RINSEATES AND PURGED GROUND WATER STORAGE. <br /> All rinseates and purged ground water produced from drilling, <br /> installation, development and the sampling rounds will be placed <br /> into a 1000 gallon "ConVault" that is being converted into a <br /> aeration tank for ground water treatment . This tank is located <br /> within a fenced compound that housed the vapor extraction system <br /> and incinerator that is being utilized at this site, see Figure 3 . <br /> DRILL CUTTINGS STORAGE. <br /> All soils produced from the drilling of monitor wells will be <br /> placed on 6 mil polyethylene liner and covered with same . This <br /> liner will be placed inside of the treatment compound. Once <br /> laboratory analvsis has been received a decision will be made on <br /> how to dispose of this soil . <br /> WELL INSTALLATION. <br /> I <br /> ' The wells will be completed to approximately 70 feet below the <br />. surface with 0 .010 slot SCH 40 F480 TriLock PVC screen from 70 <br /> I <br /> 5 <br />