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■VZ1 INC <br /> 4 The standby water supply well is estimated to have a total depth 135 feet (Appendix V) <br /> Casing diameter is eight inches and it is also unclear if this well has a sanitary seal The <br /> depth to groundwater surface for the standby water supply well in its static state is 20 feet <br /> below ground surface and 60 feet below ground surface during its pumping state The well <br /> pump is reportedly capable of providing 900 gallons per minute The bowls are set at 60 <br /> feet below ground surface <br /> The well yield for the standby water supply well is estimated to be 1,500 gallons per minute <br /> based on a pump test conducted during March 1990 This well is reportedly used on an <br /> intermittent basis as an emergency or standby backup water supply for the main well <br /> 75 Groundwater Monitoring Program <br /> A groundwater monitoring program of the wells at the site was initiated on June 2, 1989 <br /> Sebastiani utilized the services of several consultant groups to obtain monitoring data from <br /> 1989 to 1996 A standardized description of the sampling procedures used to collect the <br /> groundwater samples is presented in Appendix 11 Basic information collected during each <br /> of the monitoring events is presented in Tables 5 and 6 Tables 7 and 8 tabulate results <br /> from analytical laboratory reports for all water samples collected and analyzed since 1989 <br /> These analytical results for each of the monitoring events have been previously submitted <br /> in Quarterly Status Reports (QSR's) by McLaren, WaterWork, CEECON and WZI <br /> A series of graphs that depict groundwater surface elevations for each of the monitoring <br /> wells is presented in Appendix VI The overall trend of the groundwater surface elevation <br /> at the site is a consistent rise of approximately two to two and one-half feet per year since <br /> May 1992 All of the monitoring wells, except MW-9, have had the groundwater surface <br /> elevation rise above the screened interval <br /> A series of graphs that depict individual petroleum hydrocarbon constituent concentrations <br /> in groundwater samples collected from monitoring wells MW-1 , MW-3, MW-6 , MW-8 and <br /> MW-10 are depicted in Appendix VII The concentrations of total petroleum hydrocarbon <br /> 19150011 005 27 <br />