SITE INFORMATION AND CORRESPONDENCE

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9. Other agencies' records of possible or actions, and to develop preferred known discharge; and cleanup and abatement alternatives); 10. Refusal or failure to respond to Regional d. Implementation of cleanup and Water Board inquiries; abatement action (to implement the B. Make a reasonable effort to identify the selected alternative, and to monitor in dischargers associated with the discharge. It is order to verify progress); not necessary to identify all dischargers for the e. Monitoring (to confirm short- and Regional Water Board to proceed with long-term effectiveness of cleanup and requirements for a discharger to investigate and abatement); clean up; 2. Consider, where necessary to protect water C. Require one or more persons identified as a quality, approval of plans for discharger associated with a discharge or investigation, or cleanup and abatement, threatened discharge subject to WC that proceed concurrently rather than Section 13304 to undertake an investigation, sequentially, provided that overall cleanup based on findings of LA and LB above; and abatement goals and objectives are D. Notify appropriate federal, state, and local not compromised, under the following agencies regarding discharges subject to WC conditions: Section 13304 and coordinate with these a. Emergency situations involving acute agencies on investigation, and cleanup and pollution or contamination affecting abatement activities. present uses of waters of the state; b. Imminent threat of pollution; H. The Regional Water Board shall apply the c. Protracted investigations resulting in following policies in overseeing: (a) investigations unreasonable delay of cleanup and ` to determine the nature and horizontal and vertical abatement; or extent of a discharge and (b) appropriate cleanup d. Discharges of limited extent which can and abatement measures. be effectively investigated and cleaned A. The Regional Water Board shall: up within a short time; I. Require the discharger to conduct 3. Require the discharger to extend the investigation, and cleanup and abatement, investigation, and cleanup and abatement, in a progressive sequence ordinarily to any location affected by the discharge consisting of the following phases, or threatened discharge; provided that the sequence shall be adjusted to accommodate site-specific 4. Where necessary to protect water quality, circumstances, if necessary: name other persons as dischargers, to the extent permitted by law; a. Preliminary site assessment(to confirm the discharge and the identity of the 5. Require the discharger to submit written dischargers; to identify affected or workplan for elements and phases of the threatened waters of the state and their investigation, and cleanup and abatement, beneficial uses; and to develop whenever practicable; preliminary information on the nature, 6. Review and concur with adequate and vertical and horizontal extent, of workplan prior to initiation of the discharge); investigation, to the extent practicable. aThe Regional Water Board may give determine the source, nature an b. Soil and water investigation n d extent vebal concurrence for investigationsto of the discharge with sufficient detail proceed, with written follow-up. An adequate workplan should include or re provide the basis for decision reference, at least, a comprehensive regarding subsequent cleanup and description of proposed investigative, determent action, if any are cleanup, and abatement activities, a determined by the Regional Water sampling and analysis plan, a quality Board to be necessary); assurance project plan, a health and safety c. Proposal and selection of cleanup and plan, and a commitment to implement the abatement action (to evaluate feasible workplan; and effective cleanup and abatement 4