Laserfiche WebLink
Soil Boring Results and VEG/ISCO Work Plan <br />Field Maintenance Shop #24, Stockton, California October 2016 <br />Dissolved Metals, including Total Iron and Sodium using USEPA 6010B; <br />Total Dissolved Solids (TDS) using USEPA Method 160.1; <br />Sulfate using USEPA Method 300.0; <br />Hexavalent Chromium using USEPA Method 7196 or 7199; and <br />Field measurements for DO, ORP, pH, specific conductivity, temperature, and turbidity. <br />Remedial Progress Monitoring Wells <br />FMS-MW5, FMS-MW6, and FMS-MW7 — within the treatment zone. <br />Remedial Progress Monitoring Wells will be sampled and analyzed for the following: <br />TPH-d using USEPA Method 8015-Modified; <br />VOCs including TPH-g, Naphthalene, and BTEX using USEPA Method 8260B; <br />Dissolved Metals, including Total Iron and Sodium using USEPA 6010B; <br />Total Dissolved Solids (TDS) using USEPA Method 160.1; <br />Sulfate using USEPA Method 300.0; <br />Hexavalent Chromium using USEPA Method 7196 01 7199; and <br />Field measurements for DO, ORP, pH, specific conductivity, temperature, and turbidity. <br />Since groundwater monitoring has been on-going at the site, both WDR compliance and remedial <br />progress sampling has included only one-month, three-month, and six-month post-treatment <br />monitoring events. If applicable, a twelve-month sampling event of the downgradient compliance <br />well FMS-MW9 will be conducted. <br />Per the Monitoring and Reporting Program (MRP), a 12-month compliance-sampling event for <br />well FMS-MW9 would be performed if one or more of the target parameters are more than 20 <br />percent above background during the six-month monitoring event. Site background values for <br />inorganics will be sampled prior to ISCO injections to provide a baseline for onsite wells. The <br />highest inorganic values in groundwater from wells FMS-MW1, FMS-MW2, FMS-MW4 through <br />FMS-MW8 will be sampled prior to the implementation of ISCO treatments. Site background <br />values will be first reported in the 30-day post-ISCO monitoring report and referred to in <br />subsequent monitoring reports. <br />3.4. Surveying <br />Following the abandonment of VEG wells, post VEG soil confirmation borings, and ISCO injection <br />points the locations will be surveyed using a handheld global positioning system (GPS) unit. <br />Locations collected using GPS technology will be field-checked using established benchmarks on <br />the site. <br />3.5. Investigation Derived Waste <br />Investigation derived waste (IDW) generated during the VEG remedial action and ISCO injections <br />will include VEG emission filters, soil cuttings and asphalt debris from the advancement of <br />injection wells and points, purge water from groundwater monitoring activities, and wastewater <br />from decontamination procedures. All IDW will be segregated and containerized in separate <br />Department of Transportation (DOT)-approved 55-gallon steel drums and temporarily stored at a <br />location agreed upon by CA ARNG onsite personnel. Each drum will be sealed and clearly <br />Page 10.