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Ground-Water Monitoring Report Fourth Quarter 2000 <br /> Geweke Land Development &•Marketing,-. <br /> 16'South-Cherokee Lane, Lodi, California , <br /> I1.:0. " INTRODUCTION AND SCOPE OF-WORK <br /> At the request of Geweke Land Development & Marketing (GLDM), and in' accordance with <br /> Cleanup and Abatement Order No. 93-701,Advanced GeoEnvironmental,-.Ine. (AGE) has prepared <br /> :this report 'of monitoring field activities performed at 16.South Cherokee Lane, Lodi, California <br /> during the fourth quarter of 2000. The site and'its surroundings are illustrated on Figure 1. Structures <br />'. and.well locations related to the site are shown on Figure 2. <br /> This report documents ground water monitoring and sampling activities at the site during the fourth f <br /> „ quarter of 2000. Results of previous investigations'are detailed in the Problem Assessment Report <br /> (PAR),,the Quarterly Report= March_ 1996 and the Quarterly Report - March'and June 1999. <br /> Analytical results from previous monitoring events are included in Tables 2, 3, 5 and 6 of this <br /> I' report. . <br /> 2.0. .., PROCEDURES <br /> 1'• Quarterly ground water monitoring was performed on 15 December 2000.Field work was performed <br /> in accordance with San Joaquin County Public Health Services - Environmental'Health Department <br /> (PHS-EHD) and Central Valley Regional Water Quality Control Board(CVRWQCB)'guidelines for <br /> tthe investigation of underground storage tank (UST) sites. <br /> 2.1. ' 1 MONTTORING WELL PURGE-PROCEDURES - <br /> On l S December 2000,-a Solinst water level meter was used to measure the depth to groundwater <br />' in fourteen wells relative to the-tops of the well easings (Table .1). Seven monitoring wells were <br /> purged and sampled. Wells.NW-6 through MW--9,MW-11, MW�-12 and MW-'14 were purged using <br /> a Gruridfos submersible purge pump. Approximately eight,to ten gallons of grater (a minimum of <br /> I three casing-water volumes) .were removed from'each well. _ <br /> Temperature, pH and conductivity of the purge water were measured at two-gallon intervals using <br />' a Hydac water analyzer and the readings were.recorded on,field logs. The percent dissolved oxygen <br /> :.was measured-in the final•purged watenof each well. Field data and worksheets are included in <br /> Appendix A. The purged water was plaeed in DOT-approved drums and stored.on-site. <br />' Advanced GeoEnvironm ental,Inc. <br />