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GROUND WATER INVESTIGATION WORK PLAN <br />BULK TERMINALS SITE, PORT OF STOCKTON, STOCKTON, CALIFORNIA <br />3.1.4 Task 4 — Data Evaluation and Monitor Well Recommendations <br />The data generated during the ground water investigation will be analyzed pursuant to the <br />goals and objectives of the project and as described above. All analytical data will be <br />summarized, tabulated, and as appropriate, presented graphically. <br />Once the data are evaluated, results will be presented in a meeting with the Regional Board. <br />The purpose of the meeting is to present the understanding of the site conditions, a site <br />conceptual model and, as appropriate, recommend refinements to the monitor well locations <br />proposed in Phase 2. <br />3.2 PHASE 2— MONITOR WELL INSTALLATION AND QUARTERLY GROUND WATER <br />MONITORING <br />The following details the specific tasks resulting in the construction of additional monitor wells <br />at the bulk terminals site and their subsequent quarterly monitoring and reporting. <br />3.2.1 Task 5 —Utility Location, Permitting, and Health and Safety Plan <br />This task will be implemented as described above in Task 1. <br />3.2.2 Task 6 - Monitor Well Installation <br />Monitor wells will be installed at approximately five locations (MW-5 through MW-9; Figure 6). <br />The purpose of the monitor wells is to enable routine collection of ground water samples from <br />the shallow aquifer to supplement data from the existing site ground water monitor wells. The <br />monitor well design proposed herein is based on the conceptual hydrogeologic model <br />developed from previous investigation; actual monitor well location and design will be based <br />on improved data concerning the occurrence of contaminants of concern in ground water, as <br />well as improved understanding of the local shallow hydrogeologic system resulting from the <br />implementation of Phase 1. For example, if analytical data from Phase I boring C-12, in the <br />copper concentrate storage area, indicates that elevated copper extends beneath surficial soil, <br />then an additional well would be recommended to monitor ground water at this locality. <br />The rationale for monitor well locations and general construction details are provided below. <br />MW-5 — is located within the northern stockpile and conveyor system area. This well <br />monitors shallow ground water associated with a potential source area of sulfur <br />and sulfate, petroleum hydrocarbons, nickel and vanadium. Ground water in <br />this area of this stockpile is not currently monitored. <br />July 2005 Page 15 Environmental Risk Services Corp.