SITE INFORMATION AND CORRESPONDENCE

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7. Require the discharger to submit reports C. Require the discharger to consider the on results of all phases of investigations, effectiveness, feasibility, and relative costs of and cleanup and abatement actions, applicable alternative methods for investigation, regardless of degree of oversight by the and cleanup and abatement. Such comparison Regional Water Board; may rely on previous analysis of analogous sites, and shall include supporting rationale for 8. Require the discharger to provide the selected methods; documentation that plans and reports are prepared by professionals qualified to D. Ensure that the discharger is aware of and prepare such reports, and that each considers techniques which provide a component of investigative and cleanup cost-effective basis for initial assessment of a and abatement actions is conducted under discharge. the direction of appropriately qualified I. The following techniques may be professionals. A statement of applicable: qualifications of the responsible lead professionals shall be included in all plans a. Use of available current and historical and reports submitted by the discharger; photographs and site records to focus investigative activities on locations and 9. Prescribe cleanup levels which are wastes or materials handled at the site; consistent with appropriate levels set by the Regional Water Board for analogous b. Soil gas surveys; discharges that involve similar wastes, site c. Shallow geophysical surveys; characteristics, and water quality considerations; d. Remote sensing techniques; B. The Regional Water Board may identify 2. The above techniques are in addition to investigative and cleanup and abatement the standard site assessment techniques, activities that the discharger could undertake which include: without Regional Water Board oversight, a. Inventory and sampling and analysis of provided that these investigations and cleanup materials or wastes; and abatement activities shall be consistent with the policies and procedures established herein. b. Sampling and analysis of surface water, c. Sampling and analysis of sediment and III. The Regional Water Board shall implement the aquatic biota; following procedures to ensure that dischargers shall have the opportunity to select cost-effective _ d. Sampling and analysis of ground methods for detecting discharges or threatened water, discharges and methods for cleaning up or abating e. Sampling and analysis of soil and soil the effects thereof. The Regional Water Board pore moisture; shall: f Hydrogeologic investigation; A. Concur with any investigative and cleanup and abatement proposal which the discharger E. Ensure that the discharger is aware of and demonstrates and the Regional Water Board considers the following cleanup and abatement finds to have a substantial likelihood to achieve methods or combinations thereof, to the extent compliance, within a reasonable time frame, that they may be applicable to the discharge or with cleanup goals and objectives that threat thereof: implement the applicable Water Quality Control I. Source removal and/or isolation; Plans and Policies adopted by the State Water Board and Regional Water Boards, and which 2. In-place treatment of soil or water: implement permanent cleanup and abatement a. Bioremediation; solutions which do not require ongoing maintenance, wherever feasible; b. Aeration; B. Consider whether the burden, including costs, c. Fixation; of reports required of the discharger during the 3. Excavation or extraction of soil, water, or investigation and cleanup and abatement of a gas for on-site or off-site treatment by the discharge bears a reasonable relationship to the following techniques: need for the reports and the benefits to be a. Bioremediation; obtained from the reports; 5