ARCHIVED REPORTS XR0000680 - Laserfiche WebLink

Home Browse Search

• 07 December 2001 AGE Project No 96-0232 Page 6 of 9 with a safety chain to prevent dropping the pump to the well bottom To minimize sediment Intake through the pump, the bottom of the pump/motor assembly will be suspended approximately I foot from the bottom of each well Electrical winng will be connected from the top of the pumps through Class I electrical connectors/junction boxes and electrical conduit to the pump controllers 55 EXTRACTION WELL PUMP CONTROLLERS The extraction well pump will be controlled by PumpTec controllers, each ground water extraction pump will operate Independently on a separate controller Pump controls will be supplied by an amperage sensing/time control switch This switch will detect any decrease in amperage when water level drops below the Impeller Intake from any of the Grundfos pumps 56 TREATMENT SYSTEM The existing 1,000-gallon holding tank associated with the Flag City Chevron ground water pump . and treat system will be used to temporarily store off-site extracted water prior to processing As indicated above, this tank is equipped with various level control switches which serve to control the rate at which extracted water is introduced into the treatment vessels, to provide safety shutoff capabilities and to allow coarser sediment to settle out prior to treatment The process pump is located directly behind the holding tank The first two stages of treatment media are contained in two 2,000-pound GAC absorption vessels, the final two stages of treatment media are contained In two 2,500-pound SunSolve absorption vessels The first two vessels are designed to adsorb TPH-g, TPH-d and BTEX compounds The final two vessels contain SunSolve, a liquid phase filtration media specifically designed to adsorb MTBE Sample ports are located between all vessels to allow detection of potential media break through and to obtain final discharge samples The system design was detailed in Final Remediation Plan, dated 31 August 2001 5 7 MONITORING AND MAINTENANCE ACTIVITIES In accordance with CVRWQCB General Order No 5-00-119, samples from the ground water extraction and treatment system influent, treatment system effluent and receiving water will be collected on a monthly basis Samples will be submitted to a State of California Department of Health Services (DHS)-certified laboratory for analysis A copy of Attachment B to General Order No 5-00-119 for Discharge to Surface Waters of Ground water From Cleanup of Petroleum Fuel Pollution is attached as Appendix B and outlines specific analyses and sampling frequencies Advanced GcoEnvironmental,Inc