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I ' 24 October 2005 . AGE-NC Project No 95-0167 ' Page 4 of 10 ' collection, the samples were properly labeled, placed in a chilled container, and transported under chairs of custody to CTEL for analysis The samples were analyzed for the following constituents ' TPH-g in accordance with EPA Method 8015 Modified, and • BTEX and the fuel additives MTBE, DIPE, ETBE, TAME, TBA, EDB, and 1,2-DCA in accordance with EPA Method 8260B ' 23 WELL HEAD SURVEY On 05 October 2004,a California state-licensed survey engineer from Morrow Surveying surveyed the elevation at the tops of the well casings and the locations of ground water monitoring wells MW-7 and MW-8, and re-surveyed monitoring wells MW-1 through MW-6 Elevations were surveyed to the nearest 0 01-foot using global positioning system (GPS) observations Coordinate locations (x and y) of well locations were calculated to the nearest 0 1-foot using coordinate datum NAD 83 from GPS observations The results of the well survey are reported in Table I The lie surveying report (Morrow Surveying) is presented in Appendix D ' 24 CPT LITHOLOGIC INVESTIGATION On 12 October 2004, one soil boring(CPT-1)was advanced on-site utilizing CPT technology At the boring location, lithologic data was collected from the initial CPT sounding, an immediately adjacent twin boring was advanced to collect grab ground water samples from selected depths ' 2 4 1 Advancement of CPT Borings ' The CPT Investigation utilized a 25-ton,truck-mounted CPT drill rig equipped with 2-inch diameter hollow-stem rods A hydraulic ram was utilized to advance a piezocone (cone penetrometer with pore pressure measurement) attached to the hollow-stem rod assembly to total depth of each soil boring, a piezocone Illustration Is provided In Appendix E Soil boring CPT-1 was advanced to a total depth of 80 feet bsg, east of the former UST location (Figure 2) At the sounding location,the soil parameters of piezocone tip resistance, sleeve friction, and pore water pressure were continuously measured as the piezocone was advanced to depth Utilizing the soil parameters, a computer program Interpreted general lithology types based on the ' CPT Soil Behavior Classification System (Robertson, P K , Campanella, R G, Gillespie, D, and • Greig, J , 1986)and displayed the interpreted hthologies on a continuous CPT boring log The CPT ' Advanced GcoEnviroamental,Inc