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LIGHT, AIR & SPACE CONSTRUCTION <br /> ENVIRONMENTAL SERVICES COMPANY <br /> State Contractor's License Number 445403 <br /> State EPA R.E.A.Number 04072 <br /> Office 408-979-0661 <br /> 6.0 Groundwater Elevations and Depths to Groundwater <br /> The monitoring well groundwater elevations and depth to water data are presented below. <br /> Table 1. Groundwater Depth and Elevation Data in Monitoring Wells <br /> Date Well Well Depth to Top of Casing Groundwater Comments <br /> Sampled Number Groundwater Elevation(ft)* Elevation(ft) <br /> Measured from <br /> Top of Casing(ft) <br /> Dec.2,2008 MW-l 9.40 16.62 7.22 None <br /> Dec.2,2008 MW-2 9.41 16.42 7.01 None <br /> Dec. 2.2008 MW-3 8.70 15.42 6.72 None <br /> March 17,2009 MW-l 8.53 16.62 8.09 None <br /> March 17,2009 1 MW-2 8.44 16.42 7.98 None <br /> March 17,2009 1 MW-3 1 7.69 1 15.42 7.73 1 None <br /> *-Elevation in feet referenced to a City of Manteca NGVD monument located in McKinley Avenue. <br /> 7.0 Tabulated Results of Soil and Groundwater Analyses <br /> The tabulated results of the soil and groundwater analyses are presented in Tables 3, 4, 5 and 6 <br /> attached. <br /> &0 Concentrations and Mass Changes-Soil <br /> The soil samples and groundwater samples were tested for the following; Total Petroleum <br /> hydrocarbons as Gasoline (TPHG) and Diesel (TPHD), Benzene (B), Toluene (T),Ethylbenzene <br /> (E), Xylene (X), and Volatile Organic Compounds (VOC), Methyl-tert-butyl-ether(MTBE), and <br /> fuel oxygenates tent-Amyl-Methyl-Ether, Ethyl-tent-Butyl-Ether, Di-Isopropyl Ether and Tert- <br /> Butyl Alcohol, and 1,2-Dichlorethane and Ethylene Dibromide, Ethanol and Methanol using <br /> EPA Methods 351018015, 5030, 8020 and 8260 (see Tables 3, 4, 5 and 6). The highest levels <br /> observed in the soil and groundwater samples from the excavations and monitoring wells are <br /> listed below. <br /> Page 6 of 16 <br /> MAIN OFFICE - 1707 LTrrLE ORCHARD STREET,SUITE A -SAN JOSE-CA-95125 <br /> MAILING ADDRESS*P.O.Box 36303*SAN JOSE*CA*95158-6303*408/979-0661 -4081979-0621 FAX-LASCONSTCu�AOL.COM E-MAIL <br /> GENERAL AND ENGINEERING CONTRACTOR-HAZARDOUS SUBSTANCE REMOVAL CONTRACTOR-SITE ENVIRONMENTAL ASSESSMENTS <br /> WETLAND AND RIPARIAN HABITAT—ASSESSMENT—DESIGN—RESTORATION—CONSTRUCTION—MITIGATION MONITORING <br />