Laserfiche WebLink
13 August 2004 <br /> AGE-NC Project No . 95-0167 <br /> Page 3 of 9 <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the fuel additives including <br /> methyl tertiary-butyl ether (MTBE), tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), <br /> ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), 1 ,2-dibromoethane <br /> (EDB) and 1 ,2-dichloroethane (1 ,2-DCA) by EPA Method 8260B . <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 /> 2.3 : MONITORING WELL PILOT BORING ADVANCEMENT AND SAMPLING <br /> Based on ground water contamination encountered at the site, AGE proposes installation of <br /> additional ground water monitoring wells to continue lateral assessment and definition of the <br /> petroleum hydrocarbon-impacted ground water in the following locations : <br /> • A first groundwater well approximately 25 to 30 feet south of well MW4 ; adjacent to the <br /> driveway access at Fremont Street; and <br /> • A first groundwater well approximately 40 to 45 feet north of well MW-3 , at the northwest <br /> corner of the Guardino and Crawford building. <br /> The proposed first ground water monitoring well pilot borings will be advanced to a depth of <br /> approximately 25 feet bsg utilizing a truck-mounted, hollow stem drill rig equipped with 8-inch <br /> diameter hollow-stem augers. Total depths and locations of borings may vary according to <br /> hydrogeologic/geologic and site conditions encountered during drilling. Procedures for monitoring <br /> well pilot boring advancement are presented in Section 3 .3 . . <br /> As the borings are advanced, soil samples will be collected at 5-foot intervals beginning at 5 feet bsg <br /> and extending to the total soil boring depth. Field procedures for advancement of the soil boring and <br /> collection of soil samples are presented in Section 3 .3 . . Selected soil samples from the two soil <br /> borings will be submitted for laboratory analysis by a DHS-certified laboratory for the following <br /> constituents : <br /> • TPH-g and TPH-d in accordance with EPA Method 8015 Modified; and <br /> • BTEX and the fuel additives DIPE, ETBE, MTBE, TAME, TBA, 1 ,2-DCA, EDB in <br /> accordance with EPA Method 8260B. <br /> Advanced GeoEnvironmental, Inc. <br />