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i 14 February 2000 AGE-NC Project No 95-0254 IPage 4of10 Teflon sheets, capped and sealed with tape The samples were stored in a chilled container, transported under chain-of-custody to MAI and were analyzed for the following • TPH-g and TPR-d in accordance with EPA Method 8015 Modified, • BTEX and MTBE in accordance with EPA Methods 8020, • MTBE, TBA, DIPS, ETBE and TAME in accordance with EPA Method 8260 Modified I2 5 1 Equipment Decontamination Hollow stem augers were steam cleaned prior to boring advancement Sampling tools and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox and were thoroughly rinsed with tap water prior to each sampling run Rinseate generated from decontaminating the equipment was placed in a properly labeled Department of Transportation (DOT)model 17H or Uruted Nation(UN) rated 55-gallon drum and stored on-site in an area lacking I • public access 2 5 2 Well Completion Soil bonngs MW-4 and MW-7 were completed as conventional ground water monitoring wells with I the same designation Field numbering of the wells was determined prior to each wells installation to aide the PHS-EHD in field inspections The following is a summary of the construction details • Well MW-4 (Boring MW-4)was completed with 0 02-inch slotted screen from depths of 5 to 15 feet bsg A filter pack was installed using 42112 Lonestar sand from 4 to 15 feet Bentonite chips were used to make a 1-foot plug above the sand filter packs The remaining annular space was backfilled to a depth of six inches bsg with portiand cement A traffic- rated well box (8-inch diameter) was installed over each well, in accordance with County regulations • Well MW-7 (Boring MW-7)was completed with 0 02-inch slotted screen from depths of 37 to 42 feet bsg A filter pack was installed using #3 Lonestar sand from 35 to 42 feet Bentonite chips were used to make a 5-foot plug above the sand filter packs The remaining annular space was backfilled to a depth of six inches bsg with portland cement A traffic- rated well box (8-inch diameter) was installed over each well, in accordance with County regulations As-built monitoring well diagrams for each monitoring well are included as Appendix B Advanced GeoEnvironmental Inc I