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' 0 0 <br /> • <br /> 8 2 August 2000 <br /> AGE-NC Project No 97-0249 <br /> Page 4 of 10 <br />' The CPT borings shall be advanced to approximately 70 feet bsg utilizing a 25-ton truck-mounted <br /> CPT drill ng equipped with 2-inch diameter hollow-stem rods,however,total depths ofborings may <br /> vary according to hydrogeologic conditions encountered during drilling activities <br /> Grab ground water samples will be collected in intervals of porous and permeable material Selected <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 /> • EPA Method 8015 Modified/5030 for TPH-d, <br /> f <br /> I • EPA Method 8015 Modified/5030 for TPH- , <br /> g <br /> + EPA Method 602 for BTEX, <br /> + EPA Method 8260 modified for tertiary butanol(TBA),di-isopropyl ether(D.PE), ethyl tert <br /> butyl ether (ETBE) and tert amyl methyl ether(TAME), and MTBE <br /> 50 <br /> Laboratory reports fornalysis, testing methods, laboratory quality assurance/quality control <br /> lie (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> fmdmgs and recommendations <br /> 3 3 DRILLING AND SOIL SAMPLE COLLECTION <br /> AGE proposes to install six ground water monitoring wells at the site as part of site assessment <br /> activities Proposed well locations are illustrated in Figure 2 <br /> Based on soil contamination encountered beneath the former UST area,AGE proposes groundwater <br /> monitoring wells in the following locations <br /> I + Between 150 and 160 feet south of monitoring well MW-1 to assess dissolved petroleum <br /> hydrocarbon concentrations near the southern boundary of the property, <br /> • Between 100 and 110 feet south of monitoring well MW-6 to assess the dissolved petroleum <br /> hydrocarbons near the western boundary of the property, <br /> + Between 95 and 105 feet east of monitoring well MW-3 to assess the extent of dissolved <br /> petroleum hydrocarbons down gradient of the former UST area, <br /> I + Between 105 and 115 feet north of monitoring well MW-3 to assess the extent of dissolved <br /> petroleum hydrocarbons down gradient of the former UST area <br /> i <br /> I <br /> Advanced GeoEnvironmental,Inc <br />