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I t <br /> r17 August 2005 <br /> AGE-NC Project No 98-0533 <br />' Page 3 of 6 <br />' 313 Logging <br /> The soil sample duplicates were utilized for field characterization The soil was screened for the <br />' presence of organic vapor using an organic vapor meter equipped with a photo-ionization detector <br /> (PID Thermo Environmental 580A, 10 OeV, calibrated to isobutylene), and the readings were <br /> recorded on the boring logs Soil was visually described in accordance with the Unified Soil <br />' Classification System(Boring Logs, Appendix A) <br />' 3 2 GROUND WATER MONITORING EVENT <br /> Ground water monitoring procedures were performed as outlined in the AGE-prepared Preliminary <br />' Site Assessment Work Plan, and as approved by the EHD by letter dated 23 February 2000 <br /> 3 2 1 Well Monitoring and Evacuation <br /> On 31 May 2002, a Solinst water level meter was used to measure the depth to ground water in all <br /> lie three monitoring wells relative to the tops of the well casings After the depth-to-ground water <br /> measurements were collected, casing water in the monitoring wells was evacuated using polyvinyl <br />' chloride (PVC) bailers Approximately 6 25 to 6 50 gallons of water were evacuated from each of <br /> the monitoring wells, equivalent to three casing-water volumes per well <br />' Temperature, pH and conductivity were measured at 1-gallon intervals, using an Oakton water <br /> analyzer to monitor pH, temperature and conductivity of the purged water, the field data logs are <br /> provided in Appendix A Purged water was temporarily stored on-site in 55-gallon drums <br /> 3 2 2 Collection and Analysis of Ground Water Samples <br />' Water samples were collected from each monitoring well using new disposable bailers after allowing <br /> the wells to achieve a minimum 80% recovery of the pre-purge water volume The samples were <br />' transferred into laboratory-supplied 40-m1 EPA-approved VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a sample preservative The sample vials were then labeled with the monitoring <br /> well designation,date,time of sampling and the sampler's initials The samples were transported in <br /> a chilled container under chain of custody to MAI for analysis The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as aviation gasoline (TPH-ag) in accordance with <br /> I EPA Method 5030/8015M, <br /> b <br /> � 10 <br /> rV <br /> Advanced CcoEnvironmental,Inc <br /> I <br />