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APPENDIX B <br /> MONITORING AND SAMPLING PROCEDURES <br /> H & H Marina <br /> 15135 West Eight Mile Road, Stockton, California <br /> MONITORING AND SAMPLING PROGRAM <br /> The H & H Marina site consists of 13 ground water monitoring wells, one ground water <br /> extraction well and two surface water sampling points. The Regional Board issued <br /> Monitoring and Reporting Program (MRP) No. R5-2009-0833 on 24 August 2009, which <br /> replaced MRP No. R5-2004-0828. <br /> Sampling Frequency: <br /> Quarterly: Wells MW-2, MW-4, MW-5 and EW-1; surface sampling points DDN and DDS. <br /> Semi-annually: Wells MW-2, MW-4, MW-5, MW-14 and EW-1; surface sampling points <br /> DDN and DDS. <br /> Annually: Wells MW-2 through MW-14; surface sampling points DDN and DDS. <br /> Analysis: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with <br /> EPA Method 8015 Modified and <br /> • BTEX and the fuel additives methyl tertiary-butyl ether(MTBE), tertiary-amyl methyl <br /> ether(TAME),tertiary-butyl alcohol(TBA)and 1,2-dichloroethane(1,2-DCA) by EPA <br /> Method 8260B. <br /> Note: Analysis for 1,2-DCA is not required for R5-2009-0833, but is included for other <br /> technical reasons. <br /> WELL EVACUATION <br /> Subsequent to measurement of depth to water and prior to sampling, each well is purged <br /> to ensure samples are representative of the formation, rather than standing water in the <br /> well casing. Wells are purged using either disposable plastic bailers or a Waterra inertia <br /> pump with dedicated polyethylene %-inch plastic tubing. <br /> Wells are purged until: 1) a minimum of three casing-water volumes is removed from the <br /> well; and/or 2) the field-measured ground water parameters, pH, temperature and <br /> conductivity, are stabilized. However, if a well is purged dry prior to evacuating three casing <br /> volumes, a sample is collected following 80 percent recovery of ground water within the <br /> well, or after a minimum of 1 hour, but within 8 hours, of well evacuation. <br /> Advanced CcoEovironmcntal,Inc. <br />