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I 16 August 2011 AGE-NC Project No. 97-0301 Page 6 of 11 respectively) in accordance with EPA Method 8015 Modified ; • Benzene , toluene , ethylbenzene and total xylenes (BTEX) in accordance with EPA - - Method 8260B ; • Fuel additives tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE) , methyl tertiary butyl ether (MTBE ), ethyl tertiary butyl ether (ETBE ) , tertiary amyl methyl ether (TAME ) , ethylene dibromide ( EDB ) and 1 , 2-dichloroethane ( 1 , 2-DCA) by EPA �- Method 8260B . • Total lead by EPA Method 7420 for soil disposal . Laboratory reports for soil analysis, testing methods , laboratory quality assurance/quality control (QA/QC) reports , and sample chain of custody documentation will be presented in a report with findings and recommendations . All sampling tools used for soil sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All down-hole drilling and sampling equipment will be pressure washed prior to boring advancement. 3.2 .2. Remediation Well Completion 4i ® 401 s6/ 10 The proposed remediation wellswill be single-completed utilizing 4-inch diameter schedule 40 polyvinylchloride (PVC) well casing with 30 feet of 0 . 020-inch slotted well screen ; the proposed well construction diagram is depicted in Figures 4. After installing the well casing in each boring , a filter pack material will be slowly placed through the augers over the screen interval to approximately two feet above the screened intervals; filter pack material will consist of a #3 sand . Following placement of the filter pack, the screened interval from each well will be surged utilizing a surge block for an adequate time to allow approximately 20-30 minutes to assist in settling the filter pack. Additional filter pack material will be added if settling occurs. A nominal two-foot bentonite seal (bentonite chips) will be placed above the filter pack to minimize the potential for grout penetration into the screened section of the well . The bentonite seal will be formed by pouring bentonite chips into the annulus and allowing the chips to settle on the filter pack. The bentonite chips will be allowed to hydrate with tap water for an adequate time for curing , likely one-half hour prior to grouting . The remaining annular space will be filled to one foot below ground surface with a cement grout . The grout mixture will consist of Type I/II portland neat cement and not more than 6 gallons of water per 94-pound sack of cement. The grout will be placed by pumping through tremmie pipe . Advanced GeoEnvironmental, Inc.