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MONITORING AND REPORTING PROGRAM -3- USC/A DIVISION OF HYDRITE CHEMICAL COMPANY CLASS II SURFACE IMPOUNDMENT SAN JOAQUIN COUNTY evidence of a release from the WMU, the Discharger shall notify the Board or acknowledge the Board' s finding in writing within seven days, and shall implement verification procedures within 30 days, pursuant to §2550.7(e)(8)(E) of Chapter 15. Within 90 days, the Discharger shall submit to the Board the results of the resampling and either: a. a report that demonstrates pursuant to §2550.8(k)(7) of Chapter 15 that a source other than the WMU caused the evidence of a release, or that the evidence resulted from an error in sampling, analysis, or evaluation, or from natural variation in ground water, surface water, or the unsaturated zone; or b. an amended Report of Waste Discharge for the establishment of an evaluation monitoring program, pursuant to §2550.9 of Chapter 15, to assess the nature and extent of the release from WMUs and to design a corrective action program meeting the requirements of §2550.10 of Chapter 15. Within 180 days of determining statistically significant evidence of a release, the Discharger shall submit an engineering feasibility study pursuant to §2550.8gk)(6) for corrective action program necessary to meet the requirements of §2550. 10 of Chapter 15. CORRECTIVE ACTION PROGRAM Downgradient monitoring wells show leakage of Volatile Organic Compounds (VOC) and other constituents over background concentrations. The Discharger has initiated evaluation monitoring, but has not implemented a corrective action or a ground water cleanup program. The Discharger shall submit by 1 July 1992 a revised Corrective Action Program in accordance with Article 5 of Chapter 15. The Corrective Action Program shall include, but not be limited to, any evaluation monitoring, investigation, data collection, data analysis or other tasks necessary to monitor the effectiveness of corrective actions or to begin any ground water cleanup needed to achieve compliance with the Water Quality Protection Standard. SAMPLING AND ANALYSIS PLAN A sampling and Analysis Plan shall be submitted to Board staff by 1 July 1992 for approval . The sampling and analysis plan shall include specific methods for leachate, surface water, ground water, and vadose zone pore fluid water quality sample collection, handling, chain of custody control , analytical procedures, and field and laboratory quality assurance and quality control .