Laserfiche WebLink
Groundwater Pumping Test Results Report <br /> Flag City New West#1003,6437 West Banner Street,Lodi,California <br /> Page 5 <br /> (recovery) for well EW-3 include calculations for transmissivity, conductivity, and storativity, <br /> based the data to be reasonable and consistent (Appendix D) <br /> Apex designed the pumping rates based on the Chevron site which was pumping at 4 gpm The <br /> pumps at New West were designed to also pump at 4-5 gpm but capable of pumping at 10 gpm, <br /> twice the rate of Chevron's well Apex submitted the remediation design which was approved by <br /> the SJCEH and installed before a pumping test was requested at the site by the SJCEH <br /> RECOMMENDATIONS <br /> Apex recommends installing larger pumps, which can pump 25-30 gpm that will be capable of <br /> depressing the aquifer Upon receiving concurrence from the SJCEH, Apex will begin upgrading <br /> the pumps and performing additional groundwater pumping tests <br /> Interim operation of the remediation system is not necessary at this time Apex has shown in <br /> results from quarterly monitoring that downgradient definition of the plume has been established <br /> with wells MW-5A, MW-5B, MW-6B and MW-6C, and the monthly sampling of the municipal <br /> wells CSA-31-1 and CSA-31-2 <br /> ADDITIONAL INFORMATION <br /> As requested by SJCEH, attached as Appendix E, is email correspondence between Apex and <br /> SJCEH personnel documenting approval of the bioreactor remediation system for the site <br /> Other options for water disposal were pursued such as hauling and re-injection wells In <br /> correspondence dated November 1, 2005 Apex addressed the water hauling option and found the <br /> volume of water that needed to be hauled was not feasible After the results from the <br /> groundwater pumping test, water hauling is even less feasible The re-injection wells were <br /> denied by the California Regional Water Quality Control Board and SJCEH <br /> In addition, the microorganisms have not been introduced to the remediation system They will <br /> be introduced once the system is ready to be started on a full time basis The remediation system <br /> must be started and continuously operated or the microorganism will die without the circulation <br /> of MTBE infused water and are costly to replace Once Apex receives the NPDES permit, the <br /> microorganisms will be installed and the system will be started <br />