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1� <br /> . 22 September 1997 <br /> t AGE-NC Project No 95-0167 <br /> Page 3 of 6 <br /> enumeration Data obtained from the microbiological and physicochemical analysis will be used to <br /> determine possible effectiveness of bio-remediation as a remediation alternative <br /> 3 2 SOIL LOGGING <br /> Soil was extruded from the remaining brass sleeves and screened for the presence of organic vapor <br /> using an organic vapor analyzer (OVA) meter equipped with a photo-ionization detector (PID <br /> Thermo Environmental 580A, 10 0 cV) calibrated to isobutylene The readings were recorded on the <br /> Boring Logs The soil was described in accordance with the Unified Soil Classification System A <br /> soil profile is depicted in Appendix A <br /> 3 3 GRAB GROUND WATER SAMPLE COLLECTION <br />' Grab ground water samples were collected from probe borings P1 and P4 through P8 using a <br /> . Geoprobe water sampling assembly Probe rods were extended into ground water, then pulled back <br /> Ito expose a water sampler screened interval Ground water was allowed to enter the sampler, and <br /> samples were retrieved using a modified PVC tubing bailer <br />' After sample retrieval, the sampler was disassembled and cleaned New PVC tubing was used for <br /> each sample Samples were collected from selected borings into 40-m1 EPA-approved vials <br />' containing 0 5 ml 18% hydrochloric acid for sample preservation The samples were placed in a <br /> chilled container under ice and transported under chain-of-custody to MAI for analysis <br /> 3 4 LABORATORY ANALYSIS OF SOIL AND GROUND WATER SAMPLES <br />' Selected soil and ground water samples were analyzed in accordance with EPA Method 503018015- <br /> M for total petroleum hydrocarbons quantified as gasoline(TPH-g),in accordance with EPA Method <br /> 8020/602 for volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTE&X) and methyl <br />' tertiary butyl ether(MTBE) The grab water sample collected from boring P5 was analyzed by EPA <br /> method 8260 <br /> 4 0, FINDINGS <br />' 4 1 STRATIGRAPHY AND DEPTH TO GROUND WATER <br /> • <br />' Tan and brown,silty clay was encountered in probe boring P3 to the north at boring P5 from surface <br /> Ad vanced GeoEm ironmental,Inc <br /> 1 <br /> us <br />