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v � <br /> CCR, TITLE 23, DIVISION 3, CHAPTER 16, UNDERGROUND STORAGE TANK REGULATIONS <br /> Reference: I I&SC Sections 25295, 25298, 25299.37, and 40 CFR Sections 280.61 and <br /> 280.62 <br /> 2724. Conditions That Require Soil and Water Investigation <br /> The responsible parry shall conduct investigations of the unauthorized release, the <br /> release site, and the surrounding area possibly affected by the unauthorized release, if <br /> any of the following conditions exists: <br /> (1) There is evidence that surface water or ground eater has been or may be <br /> affected by the unauthorized release; <br /> (2) Free product is found at the site where the unauthorized release <br /> occurred or in the surrounding area; <br /> (3) There is evidence that contaminated soils are or may be in contact with <br /> surface water or ground water; or <br /> (4) The regulatory agency requests an investigation, based on the actual or <br /> potential effects of contaminated soil or ground water on nearby surface <br /> water or ground water resources or based on the increased risk of fire or <br /> explosion. <br /> Authority: H&SC Section 25299.77 <br /> Reference: H&SC Sections 25299.37 and 40 CFR Sections 280.61 through 280.64 <br /> 2725. Soil and Water Investigation Phase <br /> (a) The Soil and Water Investigation Phase includes the collection and analysis of <br /> data necessary to assess the nature and vertical and lateral extent of the release <br /> and to determine a cost-effective method of cleanup. <br /> (b) Using information obtained during the investigation, the responsible parry shall <br /> propose a Corrective Action Plan. The Corrective Action Plan shall consist of <br /> those activities determined to be cost-effective. <br /> (c) The responsible parry shall submit the Corrective Action Plan to the regulatory <br /> agency for review and concurrence. The regulatory agency shall concur with <br /> the Corrective Action Plan after determining that implementation of the plan <br /> will adequately protect human health, safety and the environment and will <br /> restore or protect current or potential beneficial uses of water. The responsible <br /> party shall modify the Corrective Action Plan in response to a final regulatory <br /> 11 - 5 <br />