Laserfiche WebLink
07 October 2002 <br /> AGE-NC Project No 01-0827 <br /> Page 3 of 7 <br /> 3 2 DRILLING AND SOIL SAMPLING <br /> The proposed deep ground water monitoring well borings will be advanced to approximately 70 feet <br /> bsg The boring will be advanced utilizing a truck-mounted,hollow stem drill ng equipped with 8 25- <br /> inch diameter hollow-stem auge s Soil 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 /> according to site conditions encountered during drilling <br /> Selected soil samples will be analyzed by a State of California Department of Health Services(DHS)- <br /> certified labor atory for the following constituents <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) 3n <br /> accordance with EPA Method 8015 Modified, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl teitiaiy butyl ether <br /> (MTBE) by GC/MS (full-scan EPA Method 8260), and <br /> • Fuel additives dr-isopz opyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl <br /> • methyl ether (TAME), tertiary butanol (TBA), 1,2-drehloroethane (1,2-DCA), ethylene <br /> drbromrde (EDB) and additional volatile organic compounds (VOCs) by GC/MS (full-scan <br /> 8260) <br /> Laboratory r eports for the soil analyses,testing methods,laboratory quality assurance/quality contt of <br /> (QA/QC) reports, and sample chain of custody documentation will be presented In a report with <br /> findings and recommendations <br /> 3 3 MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY <br /> AGE will install one depth-discrete monrtot tng well at the northeast portion of the former UST area <br /> (Figure 2) Following installation, the well will be developed to maxrrnrze water flow and minimize <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 relative <br /> to mean sea level Procedures for well installation, development and survey are presented in Sections <br /> 4 2 and 4 3 , r especttvely <br /> 3 4 GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> • Ground water monrtot trig and sampling of each newly installed gr ound water monrtot rng well will be <br /> conducted on a quarterly basis unless an alternate schedule or suspension of monitoring is approved <br /> Rdvanccd C�eoBnvtnonmcntnl Inc <br /> r <br />