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29 September 2000 <br /> AGE-NC Project No 97-0301 <br /> Page 3 of 7 <br /> Between 55 and 55 feet northeast of well MW-1 to assess petroleum hydrocarbon-impacted <br /> ' ground water crossgradient from the former UST pit <br /> Between 60 and 70 feet south-southeast of well MW-1 to assess petroleum hydrocarbon- <br /> impacted ground water upgradient of the former UST pit <br /> ' Three of the four soil bonngs will be advanced to 40 feet bsg utilizing a CME-75 truck-mounted, <br /> hollow stem drill ng and 81/4-inch diameter hollow-stem augers, one soil boring will be advanced <br /> to approximately 80 feet bsg Total depth of each boring may vary slightly according to <br /> I ' hydrogeologic conditions encountered during drilling activities Field procedures for advancement <br /> of borings and well installation is presented in Section 3 1 <br /> Field procedures for soil sample collection is presented in Section 3 2 , selected soil samples will <br /> be analyzed by a State of California Department of Health Services (DHS)-certified laboratory for <br /> the following constituents <br /> Total petroleum hydrocarbons quantified as gasoline, diesel and kerosene (TPH-g, TPH-d <br /> and TPH-k, respectively) in accordance with EPA Method 8015 Modified/5030/3550, <br /> - Volatile aromatic compounds - benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> methyl tert-butyl ether(MTBE) in accordance with EPA Method 8020, and <br /> ' - Methanol, ethanol, 1,2-dichloro ethane (1,2-DCA), ethylene dibromide (EDB), tertiary <br /> butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl methyl <br /> tether(TAME) and MTBE by EPA Method 8260 Modified <br /> Laboratory reports for the soil analyses,testing methods, laboratory quality assurance/quality control <br /> ' (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations <br /> ' Selected soil samples will be analyzed by a microbiological laboratory for microbial enumeration <br /> and physicochemical characteristics, selected soil samples may also be analyzed for intrinsic <br /> ' permeability, moisture content, porosity and total organic carbon (TOC) in accordance with the <br /> appropriate EPA or ASTM methods Laboratory reports for soil analysis and sample chain of custody <br /> documentation will be presented in a report with findings and recommendations <br /> 2 3 MONITORING WELL INSTALLATION AND DEVELOPMENT <br /> "i The proposed soil borings will be completed as 2-inch diameter ground water monitoring wells <br /> Following well installation, each well will be developed to maximize water flow and minimize the <br /> amount of fine-grained sediment drawn into the well during pumping or bailing Procedures for well <br /> Advanced GeoEnvironmental,Inc <br />