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' 21January 1999 AGE-NC Protect No 98-0450 Page 3 of S ' enter the auger at a depth of approximately 45 feet below surface grade(bsg)and a water sample was retrieved using a disposable plastic bailer After retrieval, the sample was transferred to 40-m1 EPA ' approved VOA vials containing 0 5 ml hydrochloric acid (for sample preservation) and a l-liter amber bottle The sample was labeled,placed in a chilled container and transported under chain-of- custody to MAI for analysis The grab water sample was analyzed in accordance with methods noted ' above ' 2 2 EQUIPMENT DECONTAMINATION The hollow stem augers were steam cleaned prior to boring advancement Sampling tools and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox and thoroughly rinsed with tap water prior to each sampling run Following drilling activities, rinseate generated from decontaminating the equipment was placed in properly labeled Department of Transportation (D O T ) model 17H 55-gallon drums and stored on-site in an area lacking public access, pending proper disposal 23 SOIL LOGGING ' During drilling, auger returns were monitored for the presence of organic vapor using an organic vapor meter (OVM)equipped with a photo-ionization detector(PID Thermo Environmental 580A, ' 10 0 eV, calibrated to isobutylene) Duplicate soil samples were extruded fiom their sleeve and screened for the presence of organic vapor using the OVM The OVM readings were recorded on boring logs The soil was then visually described in accordance with the Unified Soil Classification ' System (see Boring Logs, Appendix A) ' 24 WELL COMPLETION Soil boring BMW3 was completed as ground water monitoring well BMW3 at the northwest edge ' of the site Soil boring SB4 was completed as ground water monitoring well BMW4 in the center of the former UST area Soil boring BMW5«as completed as ground water monitoring well BMW5 at the eastern edge of the site Soil borings S135 and S136 were advanced at the approximate ends of the former northern dispenser ' island and completed as soil gas/vapor extraction/monitoring wells VWl and VW2, respectively Additionally, soil boring SBI was established at the northwestern edge of the former UST excavation to determine xf so,l contamination extended laterally north of the former UST wall Soil borings S132 and S133 were advanced at a 35' angle from vertical under the property north of the site, Advanced CeoEnwonmenlet,Inc