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1 <br /> 16 <br /> 20 FIELD AND LABORATORY PROCEDURES <br /> This section provides a summary of the field and laboratory procedures used during the <br /> fourth quarter 1999 monitoring event <br /> 2.1 <br /> Sampling Methods And Procedures <br /> Groundwater samples were collected on December 20, 1999 Field records of sampling <br /> are attached in Appendix A Prior to sampling, the static water level was measured at each <br /> monitoring well using an electric water level indicator <br /> Groundwater sampling was conducted in accordance with procedures described in the <br /> Work Plan dated September 14, 1998 Each well was purged using a submersible pump, <br /> which was steam cleaned prior to use The wells were purged until a minimum of three <br /> casing volumes were removed from each well Temperature, pH, and specific conductivity <br /> were measured during purging Purged groundwater was stored in a polyethylene tank <br /> 1 prior to disposal into the American Molding and Mill Works sanitary sewer system, in <br /> accordance with the Special Permit for Wastewater Discharge P 106 984 104, issued by the <br /> City of Stockton on March 10, 1999 <br /> Immediately after purging, water samples were collected using disposable polyethylene <br /> bailers A new bailer was used at each well A duplicate groundwater sample was <br /> collected at DMW-6, and labeled DMW-61D <br /> "Certified clean" one liter glass sample containers, suppled by the laboratory, were used <br /> during the collection of groundwater samples The samples were placed on ice <br /> 1 immediately following collection, and kept in coolers until delivery to laboratory with the <br /> accompanying chain of custody A copy of the chain of custody is attached in Appendix B <br /> i <br /> DAMES&MOORE 2 I1DM_SAClWOL_21JOB1AFPIREPORTIQ4-1999 DOC <br />