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12 August 2009 <br /> AGE-NC Project No. 08-1633 <br /> Page 3 of 5 <br /> When reaching the targeted depth,grab ground water samples were collected utilizing apre-cleaned <br /> one-inch diameter 0.01-inch slotted temporary well screen. Grab ground water samples were <br /> extracted by lowering a Teflon hose equipped with a ball-valve through the screen section. Samples <br /> were collected in three EPA-approved 40-m1 volatile organic analysis(VOA)vials,and 1 amber liter <br /> bottle,both without a sample preservative.Collected groundwater samples were labeled with boring <br /> designation, date, time, and sampler's initials and placed in a chilled container under ice. <br /> Grab ground water samples were analyzed for the constituents of concern listed in Section 2.1.1. <br /> 2.4. SOIL LOGGING <br /> Soil sample duplicates and acetate liner samples were used to visually describe the soil profile <br /> encountered.Descriptions were generally in accordance with the Unified Soil Classification System <br /> (USCS). Boring logs for B1 through B9 are provided in Appendix B. <br /> Soil sample duplicates were also field-screened for the presence ofvolatile organic compounds using <br /> an organic vapor meter (OVM) equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580, 10.0 eV,calibrated to isobutylene)and an OVM with a flame ionization detector <br /> (FID)calibrated to hexane gas; concentration readings are noted on the boring logs. <br /> 3.0. FINDINGS <br /> Soil stratigraphy was determined from field data collected during advancement of soil boring; <br /> hydrocarbon impact to soil and ground water was quantified by laboratory analyses of soil and <br /> ground water samples. <br /> 3.1. STRATIGRAPHY <br /> Soil stratigraphy across the site was generally consistent with clays and silts encountered between <br /> the depths of 2.5 feet and 10 feet bsg in borings B1, B2, B4, B5, and B7, and to 20 feet bsg in <br /> borings B3 and B6.During the advancement of borings B8 and B9 poorly-graded gravel(likely pea <br /> gravel backfill material)was encountered at 7.5 and 10-foot sampling intervals in boring B8, and <br /> in the 5-foot sampling interval in boring B9. Boring logs documenting the advancement of boring <br /> B 1 through B9 have been provided in Appendix B. <br /> Advanced GcoEnvironmen[al,Inc. <br />