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California Regional Water Quality Coltrol Board Central Valley Region Steven T.Butler,Acting Chair Winston H.Hickoa Gray Davis Secretaryfor Governor Environmental Sacramento Main Office Protection Internet Address: ht4)://www.swrcb.cagov/--rwgcb5 3443 Routier Road, Suite A,Sacramento,California 95827-3003 Phone(916)255-3000•DoD FAX(916)255-3052 24 February, 1999 Mr. Brad Beeman Naval Computer and Telecommunications Station 305 Fyffe Ave., AC-43 Stockton. CA 95203 CATCH BASIN AND ASSOCIATED PIPING CLEANUP IN THE WAREHOUSE AREA, NAVAL COMPUTER AND TELECOMMUNICATIONS STATION, STOCKTON The Navy has requested the Board review the Navy's letter of 27 January 1999, proposing that all catch basins and associated piping, circled on an attached map, "will be cleaned of all sediment to remove any flow restrictions as part of the Navy's best management practices program." We concur with this proposal and with the areas selected for cleanup as identified on the map attached to the Navy's letter. The Board's concurrence with this proposed cleanup is conditioned upon the Navy installing additional approriately sized sediment traps located on Installation Restoration sites, downgradient from the Warehouse Area. According to the Phase 1 Finding of Suitability to Transfer (FOST), the Navy has committed to maintain and periodically clean the sediment traps "to prevent any contaminated sediment from migrating from the upper dry reach to the lower inundated reach" as documented on page 24, section 5.2.6 Storm Drain System. The Phase 1 FOST also states that"the Navy will maintain a storm water permit, which includes sampling at the storm water outfall to Burns Cutoff. The transferee has been notified that additional investigations and cleanup will be required in the storm drain system. The Navy will conduct investigations, remediation (including dredging)- and maintain a storm water permit until issuance of a determination that contaminated groundwater from IR sites is no longer entering the storm drain system. The Port will be responsible for maintenance of the storm water conveyance system." Based upon a conversation with the Navy on 19 February 1999, the Navy maintains responsibility for the storm drain system with regards to the Finding of Suitablilty to Lease (FOSL) property, which will occur simultaneously with the Phase 1 FOST. Therefore, the Port of Stockton, as the new owner, will only be responsible for the storm drain system associated with clean property to be transferred. Once we have reviewed the results of the cleanup action of the catch basins and associated piping, the Board will reconsider concurrence with the impending FOST, with respect to the storm water system. California Environmental Protection Agency Ca Recycled Paper