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' 25 August 2003 AGE-NC Project No. 03-1045 ' Page 2 of 5 ' 2.1. ADVANCEMENT OF SOIL PROBE BORING On 20 August 2003, three soil probe boring (B1, B2 and B3) were advanced to a total depth of ' 30 feet below surface grade(bsg)in boring B-1 and 6 feet bsg in borings B-2 and B-3 utilizing a van- mounted Geoprobe 5400 direct-push probing unit equipped with 1.25-inch diameter probing rods; the probing unit advances soil probe borings using a hydraulic hammer to drive soil and ground water sampling tools to specified depths. B-1 was advanced adjacent to the former UST/dispenser area, B-2 was advanced adjacent to the waste oil container, and B-3 was advanced east of the warehouse. 2.2. SOIL SAMPLE COLLECTION Discrete soil samples were collected using the Geoprobe push-driven 2-inch diameter soil sampler fitted with four six-inch long brass sleeves at 5-foot intervals,beginning at 5 feet bsg in B-1.Borings B-2 and B-3 were sampled at 4 feet and 6 feet bsg using the same sampling technique described above. Soil samples were collected to a depth of 30 feet bsg in boring B 1 and to a depth of 6 feet bsg ' in borings B2 and B3. 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. ' Soil samples retrieved from the borings were visually classified on a boring log by an AGE geologist in accordance with the Unified Soil Classification System (USCS); the soil boring log is provided in Appendix A.. Additionally, the soil samples were field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM)equipped with a photo-ionization detector (PID: Thermo Environmental 580B, 10.0 eV,calibrated to isobutylene);the concentration readings were recorded on the boring log. 2.3. GRAB GROUND WATER COLLECTION At the total depth of the probe boring B-1, a grab ground water sample was collected utilizing a ' Geoprobe water sampling assembly fitted with a pre-cleaned one-inch diameter 0.01-inch slotted temporary well screen.The ground water sample was extracted by lowering a Teflon hose equipped with a ball-valve through the hollow center of the push rods into the screen section.The sample was collected in three Environmental Protection Agency(EPA)-approved 40-ml volatile organic analysis (VOA)vials containing 0.5 ml 18%hydrochloric acid as a sample preservative.The collected ground water samples were labeled with the boring designation,date,time,and sampler's initials and placed ' in a chilled container under ice. Adv"md Ce Environmental,Inm 1