Laserfiche WebLink
f - <br /> L sho/ <br /> Report—Monitor Well Installation and Sampling <br /> New Jerusalem School <br /> February 26, 1999 <br /> Page-4 <br /> A groundwater Sample was collected from each well by filling a new, disposable, polyethylene bailer <br /> with groundwater and transferring the groundwater to two 40-milliliter glass vials fitted with Teflon- <br /> lined caps. The vials were checked to assure that no air bubbles were present_ <br /> A sample of the facility's irrigation well water (2500-IW-12/29/98) and a sample of the facility's <br /> domestic well water (2500-DW-12/29/98) were collected from the respective wells. The irrigation well <br /> and the domestic well are located approximately 30 feet north and 90 feet northeast of the fonner UST <br /> area, respectively (Figure 2, Appendix A). The samples obtained from these wells were collected by <br /> filling laboratory-supplied containers directly from the well heads. Each sample container was labeled <br /> and placed in a cooler chilled with ice and delivered under chain-of-custody procedures to GeoAnalytical <br /> Laboratories, Inc., in Modesto, California, on the day of collection. The results of the laboratory <br /> +— analyses are discussed in Section 5.2. <br /> 3.7 LABORATORY ANALYSES <br /> The soil samples collected from the monitor well borings were analyzed for benzene, toluene, ethyl <br /> benzene, and total xylenes (BTEX) by EPA Method 8020, methyl tertiary-butyl ether (MTBE) by EPA <br /> Method 8020, and for total petroleum hydrocarbons — quantified as gasoline (TPH-G) by Method <br /> 5030/LUFT. The groundwater samples and the samples collected from the irrigation well and domestic <br /> well were analyzed for BTEX by EPA Method 602, selected gasoline oxygenates/additives [MTBE, <br /> ethanol, tertiary-butanol, di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETRE), and tertiary-amyl <br /> methyl ether (TAME)] by EPA Method 8260, and for TPH-G by Method 5030/LUFT. The analytical <br /> methods and analytical detection limits are presented in Table 1, below. <br /> 6� TABLE 1 <br /> Analytical Methods <br /> CONSTITUENT METHOD DETECTION LIMIT <br /> V <br /> Soil <br /> v BTEX/MTBE 8020 5.0µg/kg(BTEX) <br /> 10 pg/kg(MTBE) <br /> TPH-G 5030/LUFT 1.0 mg/kg(gasoline) <br /> 4" Groundwater <br /> BTEX 602 0.3 Pg/1(BTE) <br /> 0.6 µg/I(X) <br /> +r <br /> TPH-G 5030/LUFT 0.05 mg/l(gasoline) <br /> GASOLINE OXYGENATES/ADDITIVES 8260 1.0µg/I(MTBE,ethanol,DIPE,ETBE,TAME) <br /> 10 gg/I(tertiary-butanol) <br /> 3.8 GROUNDWATER RECEPTOR SURVEY <br /> V <br /> Condor conducted a groundwater receptor survey, including a water well inventory, within a 2,000-foot <br /> radius of the site to identify potential areas of groundwater recharge/discharge(surface water bodies) and <br /> potential water well users that could be impacted by migration of the site groundwater. According to <br /> information obtained by Condor, municipal water supply service is not available in the vicinity of the <br /> subject site. Potable water is provided to users via private wells. The groundwater receptor smkvev <br /> L <br /> %4 CONDOR <br />