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GeologkdTechnics inc. <br /> Well Installation Report Page 3 <br /> City of Escalon <br /> Project No. 750.2 <br /> January 31,2000 <br /> 2.1.2 Soil Laboratory Analyses <br /> Soil <br /> `'` ➢ Five soil samples from MW-1 were submitted to Sherwood Laboratories of Hilmar, <br /> California(State Certified Laboratory#1400) for the following analysis: <br /> • benzene, toluene, ethylbenzene and xylene (BTEX)by EPA method 8020 <br /> ''' • gasoline-range petroleum hydrocarbons (TPH-G)by EPA method 8015(m) <br /> • the oxygenated fuel compounds (MTBE, DIPE, ETBE, TAME and TBA) by EPA <br /> method 8260 <br /> ➢ Five soil samples from MW-2 and VEW-1 were submitted to BSK Laboratories of <br /> Fresno, California(State Certified Laboratory#1180) for the following analysis: <br /> �.,, • benzene, toluene, ethylbenzene and xylene (BTEX) by EPA method 8020 <br /> • gasoline-range petroleum.hydrocarbons (TPH-G) by EPA method 8015(m) <br /> • the oxygenated fuel compounds (MTBE, DIPE, ETBE, TAME and TBA) by EPA <br /> method 8260 <br /> ➢ Four soil samples from MW-3 were submitted to BSK Laboratories of Fresno, California <br /> (State Certified Laboratory#1180) for the following analysis: <br /> `� • benzene, toluene, ethylbenzene and xylene (BTEX) by EPA method 8020 <br /> • gasoline-range petroleum hydrocarbons (TPH-G) by EPA method 8015(m) <br /> • MTBE by EPA method 8020 <br /> `" • The capillary fringe sample was tested for the oxygenated fuel compounds (MTBE, <br /> DIPE, ETBE, TAME and TBA) by EPA method 8260 <br /> +� A chain of custody was completed for all samples submitted and tracked to ensure sample <br /> integrity. <br /> 2.2 Monitoring Well Installation <br /> 2.2.1 Groundwater Monitoring Wells <br /> To investigate the presence of gasoline-range petroleum hydrocarbons in the groundwater at <br /> '-' this site, Geological Technics Inc. installed three groundwater monitoring wells (MW-1, <br /> MW-2 & MW-3). The boring, MW-1, was drilled near the north end of the former <br /> excavations. The boring for MW-2 was drilled south of the former tanks and dispenser <br /> islands. MW-3 was drilled to the east, in what is now the median of EscalonBellota Road <br /> (Figure 2, Site Map). <br /> The monitoring wells were constructed using 2-inch diameter PVC casing with flush threads. <br /> The table below shows the construction details. The filter pack was surged during placement <br /> to insure maximum filter pack density. <br /> Well o. ia. Screen Slot an acTrans. ea rout Seal <br /> 55-7 sand - - <br /> - sand - 0-51, <br /> san - - 0-5 V <br /> A surface seal was achieved by pumping a neat cement grout via a tremie tube (augmented <br /> with <4% bentonite) from the top of the Transition Seal to within 5 feet of the ground <br />