WORK PLANS - Laserfiche WebLink

Home Browse Search

08 July 1999 AGE-NC Project No. 95-0130 Page 6 of 10 Monitoring of the wells should provide data to determine if the dissolved plume is migrating or stable. Five ground water monitoring wells will be located to replace "drowned" wells MW-1 through MW-5; three monitoring wells are proposed downgradient of the site within the City of Stockton right of way. Proposed monitoring well locations are illustrated on Figure 2. Following installation, each well will be developed to maximize water flow into the well and minimize the amount of fine-grained sediment drawn into the well during pumping or bailing. Procedures for well installation and development are presented in Sections 4.2 and 4.3,respectively. 3.4. GROUND WATER SAMPLE COLLECTION AND ANALYSIS Ground water monitoring and sampling activities for each newly installed ground water monitoring well will be conducted on a quarterly basis until PHS-EHD notification to do otherwise. Ground water monitoring activities will include recording depth to ground water measurements and collection of ground water samples. Ground water sample collection procedures are described in Section 4.3. Ground water samples will be analyzed by a DHS-certified laboratory for the following constituents: • TPH-g by EPA Method 8015 Modified/5030; • BTEX by EPA Method 602; • TBA, DIPE, ETBE and TAME, and MTBE by EPA Method 8260 Modified. Laboratory reports for ground water analyses,testing methods, laboratory quality assurance/quality control (QA/QC)reports, and sample chain of custody documentation will be presented in a report with the findings and recommendations. 3.5. REPORT PREPARATION Following each quarterly ground water monitoring event, a quarterly report will be prepared presenting the findings. The quarterly reports will include a description of work performed and the results of the soil/groundwater sampling and analysis. Conclusions and recommendations will also be included in the reports, if applicable. The report will be in a format acceptable to the PHS-EHD and the CVRWQCB guidelines, and will be reviewed and signed by a California Registered Geologist. Adranced GeoEnvironmental,Inc.