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1 1 . 14 December 2000 ' AGE-NC Project No 99-0559 Page 5 of 1 i ' split-spoon sampler loaded with three 2-inch by 6-inch brass sleeves The sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of blows required to drive ' each 6-inch interval (blow counts) was recorded on boring logs by an AGE staff geologist Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, capping and sealing with tape Each preserved sample sleeve was labeled with soil boring location, ' depth, time, date and sampler's initials and was stored in a chilled container under ice Selected soil samples were logged on a chain-of-custody, transported to McCampbell Analytical Inc (MAI) a DHS-certified laboratory and were analyzed for ' 41 TPH-g in accordance with EPA Method 8015M, • BTEX and MTBE in accordance with EPA Method 8020, and ' TBA, DIPS, ETBE, TAME and MTBE in accordance with EPA Method 8260M 3 22 Logging • Soil was extruded from a duplicate sample sleeve and screened for the presence of organic vapor using an organic vapor meter (OVM) equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene), and the readings were recorded on a soil boring log The soil was then visually described in accordance with the Unified Soil Classification System (see Appendix A) I 3 2 3 Monitoring Well Installation The four pilot soil borings were completed as ground water monitoring wells utilizing 2-inch diameter, schedule 40, blank polyvinyl chloride (PVC) casing and 2-inch diameter screened PVC I casing with 0 020-inch screen slots Each well was completed by placing the PVC well casing assembly through the hollow stem of the augers to the total depth of the boring The augers were incrementally raised as#3 Lonestar sand (filter pack) was slowly poured down the annulus between Ithe well casing and the inner wall of the hollow stem auger The filter pack was placed adjacent to the screened casing from the bottom of the boring to a point approximately two feet above the top of the screen Following placement of the filter pack, a surge block was inserted into the PVC casing Iand was lowered then raised (surged) repeatedly for approximately 10 minutes The depth to the top of the filter pack was measured and bentonite chips were poured into the annulus and allowed to settle on the filter pack Five gallons of tap water were used to hydrate the bentonite chaps for one-half hour prior to grouting The remaining annular space was sealed with portland type I/I1 neat cement mixed with no more than 6 gallons of water per 94-pound sack of I