ARCHIVED REPORTS_XR0005857 - Laserfiche WebLink

Home Browse Search

' 05 January 2004 ., AGE-NC Project No. 95-0137 ' Page 4 of 8 Collected samples pr s rued �Or laboratory anal��is were placed in a chilled container under ice,and ' transported toc.;{ )under chain-of-custody.The sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to avoid cross- contamination. Confirmation borings CB 1, CB2,CB4 and CBwere sampled for groundwater. A Geoprobe water sampling assembly was advanced to a depth of 6 feet bsg,then a pre-cleaned,four-foot-by-one-inch ' outside diameter, temporary well with 0.01-inch, slotted well screen was lowered to the bottom of the bore hole.Each ground water sample was extracted by lowering a modified Teflon tube bailer into the screen section of the temporary wells. After sample retrieval, the water samplers were ' disassembled and cleaned. New Teflon tubing was used to collect each-sample. The water samples were collected in three laboratory-supplied,40-m1 VOA vials containing 0.5 ml hydrochloric acid (18%) as sample preservative and in,one 1-liter amber bottle without a sample preservative, according to EPA methods. The labeled containers were placed in a chilled container under ice and transported under chain-of-custody to NKI for analysis. ''. 2.3.2. Soil Logging and Boring Abandonment After sample collection and preservation, the soil was extruded from the remaining sleeves and ' screened utilizing an organic vapor meter(OVM),equipped with a photo-ionization detector(PID: Thermo Environmental 580b, 10.0 eV, calibrated to isobutylene);the concentrations readings were recorded on the boring logs.The soil was also visually described in accordance with the Unified Soil ' Classification System. Soil boring logs exhibiting soil profiles are depicted in Appendix B. . After soil and ground water collection,all probe borings were permanently sealed to preventvertical ' migration of contaminants by backfilling with cement slurry from the total depth to surface grade. 2.3.3. Laboratory Analysis of Soil and Grab Ground Water Samples ' Confirmation soil and grab ground water samples were analyzed for: • TPH-g and TPH-d in accordance with EPA Method 8015 Modified, ' •, BTEX and the oxygenated fuel additives: MTBE, TBA, DIPE, ETBE, TAME, EDB and 1,2-DCA in accordance with EPA Method 8260. Advanced GeoEnvironmental,Inc.