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' 30 April 2004 AGE-NC Project No 04-1129 ' Page 3 of 5 ' 3 4 2 Collection and Analysis of Ground Water Samples After allowing the wells to achieve a minimum 80% recovery of the pre-purge volume, water ' samples were collected from monitoring wells MW-1,MW-2, and MW-3 using the Watera internal pump The samples were transferred into laboratory-supplied 40-m1 EPA-approved volatile organic analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid as a sample preservative and into one ' 1711ter amber bottle without a sample preservative The sample containers were then labeled with well designation,date,time of sampling and the sampler's initials The samples were transported in a chilled container under chain-of-custody to CTEL, a California Department of Health Services ' (DHS)-certified laboratory, for analysis The samples were analyzed for • Total petroleum hydrocarbons quantified as gasoline (TPH-g), TPH-d and total petroleum ' hydrocarbons quantified as motor oil (TPH-mo) in accordance with EPA Method 8015 Modified, ' BTEX in accordance with EPA Method 8260B, and Fuel additives including methyl tertiary-butyl ether, di-isopropyl ether, ethyl tertiary-butyl lie ether, tertiary-amyl methyl ether, tertiary-butyl alcohol, 1,2-dibromo ethane and 1,2- dichloroethane in accordance with EPA Method 8260B ' 4.0. FINDINGS ' Boring log soil descriptions were utilized to model the subsurface soil profile at the site The impact to soil and ground water was assessed from laboratory analytical data obtained from samples ' collected during the well installation and subsequent sampling Ground water elevation, flow direction, and gradient were determined from field data collected on 12 May 2003 ' 41 STRATIGRAPHY T ' Generally, moderate to moderate yellowish brown to bluish gray, dry to moist, silt, silty clay and lean clay were encountered from at 25 feet bsg and from 35 feet bsg to'total depth in soil boring PB- 20 Moderate yellowish brown,dry,poorly graded sand was encountered at 30 feet The boring log ' generated from data collected during the May 2003 site assessment is included in Appendix B I42 ANALYTICAL RESULTS OF SOIL SAMPLES A total of two soil samples were analyzed as described in Section 3 3 Analytes of concern were not IAdvanced GeoEnvironmentai,Inc