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, <br /> • 24 September 2001 <br /> AGE-NC ProlectNo 95-0109 <br /> Page 4 of 9 <br /> ground water samples will be analyzed by a State of California Department of Health Services <br /> (DHS)-certified laboratory for the following constituents <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified/5030, <br />' • Volatile organic compounds including benzene, toluene, ethylbenzene and total xylenes <br /> (BTEX) in accordance,with EPA Method 8260B, and <br /> • Fuel additives-tertiary butyl alcohol(TBA),di-isopropyl ether(DIPE),methyl tertiary-butyl <br /> ether (MTBE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), <br /> ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) by EPA Method 8260 <br /> Modified <br /> Laboratory reports for ground water analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented in a report <br /> with findings and recommendations <br /> lie 3 4 MONITORING WELL BORING DRILLING AND SOIL SAMPLING <br /> AGE proposes to install one additional ground water monitoring well off-site to define the lateral <br /> extent of 1,2-DCA-impacted ground water Based on the results of the previous two ground water <br /> sampling events, AGE proposes a ground water monitoring well installation approximately 70 feet <br /> southeast of monitoring well MW--12 The proposed well location is illustrated in Figure I <br /> The proposed ground water monitoring well boring will be advanced to approximately 65 feet bsg <br /> utilizing a truck-mounted,hollow stem drill rig equipped with 8-inch diameter hollow-stem augers <br /> Total depths of borings may vary according to hydrogeologic/geologic conditions encountered during <br /> drilling Soil samples will be collected at 5-foot intervals beginning at 5 feet bsg and extending to <br /> the total depth of the boring <br /> Selected soil samples will be analyzed by a State of California DHS-certified laboratory for the <br /> following constituents <br />' TPH-g.m accordance with EPA Methods 8015 Modified/5030, <br /> • Volatile organic compounds including BTEX compounds in accordance with EPA Method <br /> 8260B, and <br /> I Fuel additives including MTBE, TBA, DIPE, ETBE, TAME, EDB and 1,2-DCA by EPA <br /> • Method 8260 Modified <br /> AdYa eed GeoEnvironmental,Inc <br /> ti <br />