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MONITORING AND REPORTING PROGRAM -3- CITY OF STOCKTON FRENCH CAMP LANDFILL LIMITED CLASS III LANDFILL SAN JOAQUIN COUNTY Chapter 15, shall consist of constituents of concern, their concentration limits, the point of compliance, and all water quality monitoring points. Constituents of concern shall include all waste constituents, reaction products, and hazardous constituents that are reasonably expected to be in or derived from waste contained in the waste management units (WMUs). Concentration limits in each medium shall consist of background concentrations of each constituent of concern or concentrations greater than background pursuant to Section 2550.4 of Chapter 15. For each monitoring period, the Discharger shall determine whether there is statistically significant evidence of a release from WMUs and whether the WMUs are in compliance with the Water Quality Protection Standard using procedures specified in §2550.7 of Chapter 15. If the Discharger, through a detection monitoring program, or the Board finds that there is a statistically significant evidence for a release from any WMU for any monitoring parameter or constituent of concern or significant physical evidence of a release from any 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 zoned 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 §2550.8 (k)(6) for corrective action program necessary to meet the requirements of §2550.10 of Chapter 15. CORRECTIVE ACTION PROGRAM Monitoring well MW-1 has VOC contamination. As of 29 June 1990, ground water from this well contained benzene, ethylbenzene, chlorobenzene, dichlorobenzene, toluene and xylene. A Verification Monitoring Report prepared by the Discharger indicates that downgradient wells have not been affected. The Discharger has been requested to initiate evaluation monitoring and propose corrective actions pursuant to Article 5, Chapter 15. The Corrective Action Program shall include,