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Phase II Environmental Site Assessment <br /> 1645 Cherokee Lane,Stockton,CA <br /> ' Hydro-Environmental Technologies, Inc <br /> ' Depth to ground water measurements, temperature, pH, and conductivity are listed in Table 2, field forms <br /> are in Appendix D Ground water samples were transferred to dedicated glass containers, in three <br /> ' preserved 40 mL VOA vials The VOA vials were properly labeled, placed inside of a Ziplock-type <br /> plastic bag to lessen possible outside contarmnation, and placed in a cooler with bagged ice for transfer to <br /> ChromaLab, of Pleasanton, a California DHS accredited laboratory Samples were transported using <br />' proper chain-of-custody procedures <br /> Table 1: Ground Water Table Measurements <br />' Central California Traction Company,Stockton CA <br /> Monitoring Top of Monitoring Depth to GW Table Temp. pH Conductivity <br /> Well No. Casing Date GW Elevation (°F) (units) (AS/cm) <br /> Elevation (ft) (ft AMSL) <br /> (ft AMSL) <br />' MW-1 1794 09/1/2000 4620 -2826 691 528 1865 <br /> MW-2 1835 09/1/2000 j 46 60 -2825 687 52 181 <br /> MW-3 1865 09/1/2000 1 4681 -2816 69 8 501 202 <br />' Rinsate water and purged ground water were placed in 55-gallon drums south of the north building, a <br /> secured area <br />' 3 2 2 Ground Water Table Measurements <br /> Based on the current monitoring well installation investigation, ground water in the unconfined to semi- <br /> confined zone ranged from approximately —28 16 feet above mean sea level (AMSL) to —28 26 feet <br /> AMSL Ground water was calculated with flow to the northwest at a gradient of 0 011 feet per foot <br />' 33 Ground Water Sample Analyses <br />' Ground water samples were transported in an ice chest with bagged ice using proper chain-of-custody <br /> procedures to ChromaLab, a California DHS accredited laboratory Samples were analyzed for TPH as <br /> gasoline by USEPA Method 8015M, BTEX and MTBE compounds were analyzed by USEPA Method <br />' 8020, and five fuel oxygenates, 1,2-dichloroethane (1,2-DCA) and 1,2-dibromoethane (EDB) by USEPA <br /> Method 8260 Analytical data are summarized in Table 3 below Certified laboratory data sheets and <br /> chain of custody forms are included in Appendix C <br /> TPH as diesel was detected at 100 parts per billion (ppb) in MW-1 and MW-3 and at 87 ppb in MW-2 <br /> No detectable concentrations of TPH as gasoline, BTEX, or the five fuel oxygenates, 1,2-DCA and EDB <br /> 5 <br /> 1 <br />