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New Jerusalem School-Quarterly Monitoring Report April 19, 1999 Page-2- j � water had been removed and until the electrical conductivity, pH, and temperature of the water had stabilized. Groundwater Monitoring Field Forms are included in Appendix B. i A groundwater sample was collected from each well by filling a'i new, disposable, polyethylene bailer with groundwater and transferring the groundwater to two 40-milliliter glass vials fitted with Teflon-lined caps. The vials were checked to assure that no air bubbles were present. A sample of the facility's irrigation well water (2500-IW-3/30/99) and a sample of the facility's domestic well water (2500-DW-3/30/99) were collected from the respective wells) The irrigation well and the domestic well are located approximately 30 feet north and 90 feet northeast of the former UST area, respectively (Figure 2, I, Appendix A). The samples obtained from these wells were collected by filling laboratory-supplied containers directly from the well heads. Each sample container was labeled and placed in a cooler chilled with ice and delivered under chain-of-custody procedures to GeoAnalytical Laboratories, Inc., in Modesto, California, on the day of collection. f � I 4. MONITORING RESULTS 4.11 FIELD OBSERVATIONS No floating product, sheen and/or discoloration were observed in the water removed from the monitor wells during the groundwater sampling. Petroleum hydrocarbon odors were not detected in the groundwater recovered from the monitor wells during the sampling event. Field observations are included on the groundwater i monitoring field forms in Appendix B. j 4.2 LABORATORY ANALYSES C R The groundwater samples were analyzed for benzene, toluene, ethyl.benzene, and total xylenes (BTEX) by EPA Method 602; total petroleum hydrocarbons quantified as gasoline (TPH-G) by Method 5030/LUFT; and for i rselected gasoline oxygenates/additives by EPA Method 8260. The selected oxygenates/additives included l E•r methyl tertiary-butyl ether (MTBE), ethanol, tertiary-Butanol, Di-isopropyl Ether (RIPE), Ethyl tertiary-Butyl Ether(ETBE), and tertiary-Amyl Methyl Ether(TAME). .i 4.3 RESULTS OF LABORATORY ANALYSES None of the analytes were detected at or above the laboratory reported detection limits in any of the groundwater samples collected from the three monitor wells or the groundwater samples collected from the on-site domestic and irrigation wells. j Laboratory analytical results of the groundwater sample are shown in�Table 1, on the next page. The laboratory certificates of .analyses and chain-of-custody record are included f in Appendix C. Historical groundwater y monitoring data is included in Table 2, Section 4.4 of this report. - C t r � � L r M `� CONDOR