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' 08 September 1999 <br /> ' AGE-NC Project No 95-0103 <br /> Page 4 of 9 <br /> ' The purge pump was washed in an Alconox solution and rinsed with tap water prior to purging each <br /> well Purged water was stored In 55-gallon drums on the site Field measurements of purged ground <br /> water are included in Appendix B <br /> 26 GROUND WATER SAMPLE COLLECTION <br /> Water samples were retrieved from each purged well using new disposable bailers The samples were <br /> ' transferred into 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0 5 ml <br /> hydrochloric acid (18%) as a sample preservative, and three samples were collected in one-liter <br /> amber bottles The samples were transported in a chilled container under chain-of-custody to <br /> McCampbell Analytical, Inc (MAI)a state-certified laboratory in Pacheco, California for chemical <br /> laboratory analyses Samples were analyzed for <br /> ' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance wlth EPA <br /> Method 8015 Modified, <br /> �. • Volatile aromatic compounds(benzene,toluene,ethyl-benzene and total xylenes BTEX)and <br /> methyl-tert-butyl ether (MTBE) in accordance with EPA Method 8020 and <br /> • Oxygenating fuel additives tertiary butyl alcohol (TBA), dl-isopropyl ether(DIPE), methyl- <br /> ' tert-butyl ether (MTBE), ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether <br /> (TAME) in accordance with EPA Method 8260 Modified <br /> 1 <br /> 27 SPARGING/EXTRACTION SYSTEM OPERATION AND MONITORING <br /> ' The in-situ air sparging (IAS) and the soil vapor extraction systems were not operated during the <br /> quarter The IAS-system has Incurred damage to the pressurized-air holding tank Therefore for <br /> ' safety reasons, the unit has not been operated and has not been repaired Repairs will be made <br /> pending determination that further air-spargmg is required <br /> The SVE unit also was not operated during this quarter The operation of the unit was curtailed due <br /> to lack of hydrocarbon vapor recovery <br /> 30 FINDINGS <br /> Analytical data from soil and water analysis are presented below and In Tables 1 through 6 Soil <br /> boring log and copies of the field measurements and laboratory reports ale included in Appendices <br /> ' A, B, C and D <br /> 41AayrcedGcoEmrronrnen1a],Inc <br /> 1 <br />