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,. ' p / CGI/EPA 6� CALIFORNIA REGIO*ATER QUALITY CONTROL BOARD yt�/ CENTRAL VALLEY REwtON e P 3443 Routier Road, Suite A e, �� Sacramento, CA 95827-3003 �a.,m Phone(916)255-3000 Pete Will FAX(916) 255-3052 Governor 10 February 1998 Mr. Peter Kalush Defense Logistics Agency Sharpe Depot, Building S-108 P.O. Box 960001 Stockton, Ca 95296-0710 ANNUAL PROGRESS REPORT. OCTOBER 1996 THROUGH SEPTEMBER 1997, DEFENSE DEPOT SAN JOA QUIN, SHARPS FACILITY, SAN JOA QUIN COUNTY We have reviewed the Annual Progress Report, dated December 1997, and submitted 5 December 1997. The Annual Report covers the period October 1996 through September 1997 for the Defense Depot San Joaquin, Sharpe facility. This Report is well written and does an excellent job of presenting the data collected. However, as in the past, the Report lacks recommendations and specific actions to be taken by Sharpe to meet the requirements of the OUI and OU2 Record of Decisions. The Annual Groundwater Report should be a comprehensive document, that includes or references all actions Sharpe will take to achieve cleanup of the groundwater. The Annual Report(Report) is the primary document for evaluating the effectiveness and efficiency of the remediation system. Therefore, Sharpe must provide a revised Annual Report to address these comments, including proposed specific actions, and a time schedule, for achieving remedial objectives. General Comments Specifically, the Annual Report must document commitments by Sharpe to activities planned for the 1998 year to achieve compliance with the following requirements: 1. OU I Record of Decision - requires full plume capture and a groundwater remedial system which is protective of human health. a. The Report concludes that Sharpe is not fully capturing the VOC plumes in the North and South Balloon B zone or the North Balloon, Central Area, and South Balloon C zones. The Annual Report does not describe specific recommendations for how this ROD objective will be achieved. Based on discussions in RPM meetings and review of Monthly Status Reports, we understand that Sharpe is currently modifying and calibrating its groundwater model to optimize the effectiveness of the extraction well network and to identify modifications that will achieve full capture. However, this effort is not mentioned in the Annual Report. The groundwater Recycled Paper Our mission is to preserve and enhance the quality ofCalifornio's water resources,and ensure/heir proper allocation and efficient use for the benefit of present andfuture generations.