Laserfiche WebLink
GROUND WATER INVESTIGATION WORK PLAN <br />BULK TERMINALS SITE, PORT OF STOCKTON, STOCKTON, CALIFORNIA <br />and Moore (1991b) and TRE Consultants (2003) both indicate a generally southeasterly direction <br />of ground water gradient, away from the adjacent river and channel. This ground water <br />gradient away from the surface water is consistent with shallow ground water beneath the <br />Delta islands, and reflects the recharge of shallow ground water from surface waters adjacent to <br />low-lying delta land. <br />3. PROPOSED SCOPE OF WORK <br />The proposed approach to characterize ground water quality at the bulk terminals site, consists <br />of the following two phases and associated tasks: <br />0. Phase 1 — Hydrogeologic Characterization <br />Task 1 — Utility Location, Permitting, and Health and Safety Plan <br />Task 2— Boring Advancement and Soil and Ground Water Sampling <br />Task 3 — Sample Analyses <br />Task 4— Data Evaluation and Presentation of Findings <br />Phase 2 — Monitor Well Installation and Quarterly Ground Water Monitoring <br />Task 5— Utility Location, Permitting, and Health and Safety Plan <br />Task 6 — Monitor Well Installation <br />Task 7— Quarterly Ground Water Monitoring <br />Task 8 — Technical Report <br />Phase 1 consists of a screening level characterization of the soil and ground water quality and <br />the hydrogeologic system. Specifically, 16 soil and 16 ground water samples will be collected <br />and analyzed from 12 borings and four existing monitor wells. An additional 8 soil samples <br />will be collected and held at the laboratory pending results. Soil samples will be collected from <br />the vadose zone. Ground water samples will be collected from the upper water-bearing zone, <br />the underlying water-bearing zone, and from existing wells MW-1 through MW-4 (Figure 5). <br />The resulting data will be evaluated and interpreted to characterize the soil and ground water <br />quality and the hydrogeologic system at the bulk terminals site. <br />Phase 2 consists of installing additional ground water monitor wells to supplement the existing <br />monitor wells at the site, followed by routine quarterly ground water monitoring and reporting. <br />Depending on the findings of Phase 1, changes to the monitor well locations proposed herein <br />may be recommended along with recommendations regarding the four existing monitor wells <br />at the site. <br />July 2005 Page 7 Environmental Risk Services Corp.