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07 Octobei 2002 <br /> AGE-NC Project No 01-0827 <br /> Page 3 of 7 <br /> 32 DRILLING AND SOIL SAMPLING <br /> The proposed deep gi ound water monrtot mg well borings will be advanced to apps oxtmately 70 feet <br /> bsg The boring will be advanced utilizing a truck-mounted,hollow stern drill rig equipped with 8 25- <br /> inch drametet hollow-stem augers Sort samples will be collected at five-foot intervals beginning at <br /> five feet bsg and extending to the total depth of the pilot boring Total depth of the boring may vary <br /> accoi ding to site conditions encountered dw tng drilling <br /> Selected soil samples will be analyzed by a State of California Department of Health Services(DHS)- <br /> certified laboratory fol the following constituents <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> accoi dance with EPA Method 8015 Modified, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tet ttary butyl ether <br /> (MTBE) by GC/MS (full-scan EPA Method 8260), and <br /> • Fuel additives di-isopropyl ether (DIPS), ethyl tertiary-butyl ether (ETBE), tertiary-amyl <br /> methyl ether (TAME), tertiary butanol (TBA), 1,2-dichloroethane (1,2-DCA), ethylene <br /> dtbromrde (EDB) and additional volatile oiganrc compounds (VOCs) by GC/MS (full-scan <br /> 8260) <br /> Laboi atory i eports for the soil analyses,testing methods,laboratory quality assur ance/quality control <br /> (QA/QC) i eports, and sample chain of custody documentation will be pi esented in a report with <br /> findings and recommendations <br /> 3 3 MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY <br /> AGE will install one depth-discrete monitoung well at the northeast portion of the former UST area <br /> (Figure 2) Following installation, the well will be developed to maximize water flow and mintrnrze <br /> the amount of fine-grained sediment drawn into the well during pumping or bailing After <br /> development,the top of the well casing(well head) will be surveyed to determine its elevation r elative <br /> to mean sea level Procedut es for well installation, development and survey are presented in Sections <br /> 4 2 and 4 3 , respectively <br /> 34 GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> • 0 ound water monitoring and sampling of each newly installed ground water monitoring well will be <br /> conducted on a quarterly basis unless an alternate schedule of suspension of monitoring is approved <br /> Advanced GeoEnvtrannentW,Inr <br />