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-- - — UtUHUt UtUKMtJIAN,Governor <br /> CALIFORNIA REGIONAL WAl QUALITY CONTROL BOARD— ;. <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 4. <br /> 18 March 1988 <br /> , r1R 2, <br /> r'-[AI- HEALTH <br /> tvNVIROr!��E ySERVICES <br /> Mr. Dana Means <br /> t Ep:JII <br /> Southwest Hide Company <br /> P.O. Box 2083 <br /> Manteca, CA 95336 <br /> REVISED GROUND WATER MONITORING PROPOSAL; SAN JOAQUIN COUNTY <br /> We have reviewed the subject proposal dated January 1988. Overall , the next phase <br /> of proposed work is adequate. We do have, however, a number of comments regarding <br /> the workplan which we discussed with you and your consultants at a meeting on 8 <br /> March 1988 (sign-up sheet enclosed) . The comments are as follows: <br /> 1. Water levels need to be presented and contoured on a plan- map of the site and <br /> surrounding area. Water levels should be measured at least twice monthly. <br /> 2. A new time schedule for completing work needs to be submitted. The existing <br /> one is out of date. <br /> 3. Details regarding drilling methods, past and proposed logging procedures, <br /> monitoring well materials and construction techniques, development methods, <br /> and purging/sampling protocol need to be submitted. <br /> 4. Proposed well locations should be presented on a site pian with appropriate <br /> identification . Wells screened at different depths to define vertical <br /> gradients and contamination need to be completed at single locations in <br /> clusters. <br /> 5. Laboratory methods should be identified by method numbers; include QVAC. <br /> 6. Screen intervals of deep monitoring wells must be based on the stratigraphy <br /> encountered. <br /> 7. The proposed soil sampling locations should be adjusted or reduced based on <br /> previous sampling results. <br /> 8. Future report submittals should contain an introduction and summary of project <br /> status, description of work performed, presentation of data, discussion and <br /> interpretation of results, recommendations for additonal wor,.; ( if any' , with <br /> an accompanying time schedule. All data, including QA/QC results, should be <br /> summarized in tables . Actual results, logs field sheet ,' etc . should be <br /> appendicized. <br />