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19 June 2008 AGE-NC-02-0950 Page 4 of 5 3.3. WELL-HEAD SURVEY i On 31 March 2008,a California state-licensed surveying engineer from Morrow Surveying of West j Sacramento, California surveyed the location of wells MW-6 and MW-7,and existing wells MW-1 through MW-5, to the nearest centimeter using the global positioning system (GPS) and City of Stockton benchmark. The results of the monitoring well survey are recorded in Table 1; the. surveying report is presented in Appendix E. The XYZ,map and boring logs were uploaded to the State GeoTracker online database; the confirmation numbers are 1340117514, 3621307849, 3121523797, 7431322991, and 3691838145. 3.4. WASTE DISPOSAL Soil cuttings and water and well development activities were properly manifested and disposed as non-hazardous waste. Soil was characterized by laboratory analysis. On 07 April 2008, approximately 8'.56 tons of soil were transported as non-hazardous waste by L&B Environmental Inc.of Stockton,California,under waste manifest number 671250,to Forward Landfill,a licensed class Il disposal.facility located in Manteca,California,for proper disposal.The waste manifest is included in Appendix F. i 4.0. FINDINGS Soil stratigraphy was determined from field data. The contaminant 'impact to soil was quantified from laboratory analytical data. 4.1. STRATIGRAPHY For the pilot boring for well MW-6,tan brown silt,was noted at 5 to 15 feet bsg; olive brown sandy silt was noted at 20 to 25 feet bsg; and gray silty sand with a toe of gray clay was noted at 30 feet bsg. For the pilot boring for well MW-7, dark brown silty clay was noted at 5 feet bsg; olive brown silt was noted at 10 to 15 feet bsg;gray to olive brown sandy silt was noted at 20 to 25 feet bsg;and gray silty sand was noted at 30 feet bsg. Hydrocarbon odors were encountered in samples collected from pilot boring MW7 at 20 and 25 feet bsg (See Appendix C for boring logs). Advanced GcoEnvironmental,Inc. I