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i 26 October 1998 AGE-NC Project No 97-0249 Page 2 of 5 I • EPA Method 5030/8015M for total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, respectively), • EPA Method 8020 for volatile aromatics (benzene, toluene, ethyl benzene and xylene i BTEX) with methyl-tertiary butyl ether (MTBE), and i • EPA Method 8260 modified for tertiary butanol (TBA), di-isopropyl ether{DIPS), ethyl tert butyl ether (ETBE) and tert amyl methyl ether (TAME), and MTBE 1- 12 Ground Water Sample Collection Several attempts were made to collect grab ground water samples from P5 through P8 utilizing the Geoprobe hydro-punch technology A Geoprobe ground water sampling assembly was advanced to the desired depth utilizing hollow steel rods The hollow steel rods were then retracted upward I approximately five feet, thereby exposing a PVC screen to ground water However, ground water was not encountered in either P 12 or P 13 at depths between 20 and 25 feet bsg 2 1 3 Equipment Decontamination EPrior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly rinsed with clean water after washing with a solution of Alconox Geoprobe rods were cleaned prior to soil probe boring advancement I214 Logging During drilling activities, sample duplicates were monitored for the presence of organic vapor using an organic vapor aneter equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) and were described on boring logs using the Unified Soil Classification System (USCS) Boring logs are included as Appendix A 3.0. FINDINGS 3 1 SOIL PROFILE Generally, a pale brown to gray brown, damp to moist, silty fine to medium sand was encountered from surface grade to depths of approximately 15 feet bsg Between 15 feet bsg and 20 feet bsg, a Adianced GcoEnvironmental,Inc I