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08 September 1999 <br /> AGE-NC Project No 95-0103 <br /> ' Page 2 of 9 <br /> ' Confirmation `hydro-punch` borings were advanced to 20 feet bsg, at the vadose zone/ground water <br /> interface, allowing for grab water sampling Locations of the soil probe borings are illustrated on <br /> Figure 2 <br /> Probe borings were sampled using a Geo robe soil sampling <br /> device loaded with four 6-inch by 1 25- <br /> inch brass sleeves The soil samples were collected at five-foot intervals The second sleeve, <br /> collected from a depth of approximately eight feet was covered with Teflon sheets, capped and <br /> sealed with tape All samples were labeled uniquely The sampling equipment was washed in an <br /> ' Alconox solution and rinsed with water prior to each sampling run to avoid cross-contamination <br /> Collected samples preserved for laboratory analysis were placed in a chilled container, under ice and <br /> ' delivered under chain-of-custody to a waiting onsite mobile laboratory, Onsite Environmental <br /> Laboratory Inc (OnSite) <br /> All probe borings were permanently sealed to prevent vertical migration of contaminants Soil <br /> borings were abandoned by backfilling with cement slum, from the total depth to surface glade <br /> lie 2 2 SOIL LOGGING <br /> ' After sample preservation, soil was extruded from the remaining sleeves and screened utilizing an <br /> organic vapor meter equipped with a photo-ionization detector(PID Thermo L-nviromnental 580A <br /> 10 0 eV, calibrated to isobutylene), while the readings were recorded on the Boring Logs The soil <br /> ' was described in accordance with the Unified Soil Classification System A soil profile is depicted <br /> in Appendix A <br /> 2 3 GRAB GROUND WATER SAMPLE COLLECTION <br /> ' Soil probe boring C133, CHPI through CHP9, including CHP5C were sampled for ground XNatei <br /> ' Hydro-punch samples CB3, CHPI through CHP5 were collected on 24 May 1999, hydro-punch <br /> samples C136 and C137 were collected on 25 May 1999 and hydro-punch samples CB8, CB9 and <br /> CB5C were collected on 20 July 1999 <br /> ' A temporary, pre-cleaned, one-inch 0 01 slotted temporary well screen was placed into the soil <br /> boring to a depth of 20 feet bsg After sample retrieval, the water sampler was dis,ssembled and <br /> ' cleaned New Teflon tubing was used to collect each sample Each ground water sample was <br /> extracted by lowering a modified Teflon bailer into the screen section of the temporary wells <br /> Samples were collected into three laboratory-supplied, 40-m1 volatile organic analysis (VOA) vials <br /> Atli onced GeoEmironmental,inc <br /> 1 <br />