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10 August 1999 <br /> . AGE-NC Project No. 98-0520. <br /> Page 3 of 6 <br /> • Fuel oxygenates,including tertiary butanol(TBA),di-isopropyl ether(RIPE),ethyl tert-butyl <br /> ether (ETBE) and tert-amyl methyl ether (TAME) and MTBE in accordance with EPA <br /> Method 8260M. <br /> Grab groundwater samples were collected from all probe borings. Samples were collected utilizing <br /> a Geoprobe water sampling assembly fitted with a pre-cleaned one-inch 0.01 slotted temporary well <br /> screen. Each ground water sample was extracted by lowering a Teflon bailer through the hollow <br /> center of the push rods into the screen section. Upon retrieval, each sample was transferred into <br /> EPA-approved 40-m1 VOA vials,containing 0.5 ml 18%hydrochloric acid as a sample preservative. <br /> Care was taken to ensure that visible air bubbles were not present in the VOAs after filling and <br /> capping. Samples for TPH-mo analyses were collected in laboratory-supplied, I-liter amber bottles. <br /> Ground water sample containers were labeled with the boring designation, date,time, and sampler's <br /> initials and were placed in a chilled container under ice. <br /> Select water samples were.logged on a chain-of-custody and transported to a DHS-certified <br /> laboratory and analyzed for: <br /> • TPH-g in accordance with EPA Method 503018015M; <br /> • TPH-mo in accordance with EPA Method 355018015M; <br /> • BTEX with MTBE in accordance with EPA method 8020; <br /> • Volatile hydrocarbons in accordance with EPA Method 601; and <br /> • Fuel oxygenates,including TBA,DIPE,•ETBE,TAME, and MTBE in accordance with EPA <br /> Method 8260M.j <br /> 3.3. LOGGING <br /> During probe boring activities, sample duplicates were monitored for the presence of organic vapor <br /> (OV) using an organic vapor meter equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580A, 10.0 eV,calibrated to isobutylene)and were visually described ori boring Iogs <br /> in accordance with the Unified Soil Classification System (USCS). Boring logs are included in <br /> Appendix A. <br /> 3.4. EQUIPMENT DECONTAMINATION <br /> All probing rods used were cleaned prior to advancement in each probe boring location. Sampling <br /> Advanced GeoEnvironmenlal,Inc. <br />