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• • GROUND WATER MONITORING WORK PLAN DREDGE MATERIAL DISPOSAL SITE 1,ROBERTS ISLAND,PORT OF STOCKTON ■ Anions- Chloride, SO4 (sulfate), Nitrates as nitrogen by EPA method 300.0 ■ Dissolved inorganics Al, As,Ba,Bo, Cu, Fe, Pb, Mn, and Zn by EPA Method 6010 ■ Cations-Ca, K, Na, and by EPA Method 6020. 3.2.3.3 Quarterly Ground Water Monitoring Reports Quarterly ground water monitoring reports will be prepared and submitted on the 1s,day of the second month following quarterly ground water sampling. The report will be consistent with the requirements for the Quarterly Report, as detailed in the WDR R5-2004-0137 Monitoring and Reporting Program. 3.2.4 Task 8—Technical Report The final technical report (Report) will be submitted within eight weeks following receipt of all analytical data. The report will be consistent with the requirements detailed in the WDR R5- 2004-0137 Monitoring and Reporting Program,Attachment E. As described above in Task 4, the data will be analyzed pursuant to the goals and objectives of the project and as described above. Geologic, hydrogeologic, and chemical data collected from the dredge material, foundation soils, peat layer, aquifer, and all water samples will be evaluated, summarized, and interpreted relative to the purpose and objectives of this Work Plan. The evaluation of the data will yield geologic cross sections, comparisons of geochemical characteristics of dredge materials, foundation soils, peat, and aquifer materials, comparisons of the geochemical characteristics and quality of surface water, water within dredge materials and peat layer, and water within the shallow sandy aquifer. All analytical data will be summarized, and as appropriate, presented graphically. The Report will present a site conceptual model of DMD1 and the underlying ground water system. As appropriate, the Report will offer conclusions regarding the threat to ground water posed by the dredge sediments, opportunities for reuse of dredge materials, and may recommend alternatives to the monitoring and reporting program. January 2005 Page 20 Environmental Risk Services,Corp.