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MONITORING AND REPORTING PROGRAM _4- <br /> USC/A DIVISION OF HYDRITE CHEMICAL COMPANY <br /> CLASS II SURFACE IMPOUNDMENT <br /> SAN JOAQUIN COUNTY <br /> PROPOSED GROUND WATER AND VADOSE ZONE PORE FLUID <br /> MONITORING PROGRAM <br /> The Discharger shall submit by 1 July 1992, a proposed revised ground water and <br /> vadose zone pore fluid monitoring system and program in accordance with Article <br /> 5 of Chapter 15. The water quality monitoring system and program shall be <br /> sufficient to demonstrate compliance, or lack thereof, with the Water Quality <br /> Protection Standard. Existing water quality monitoring stations and data can be <br /> proposed for incorporation in the revised monitoring system and program. The <br /> proposal shall include: <br /> 1 . Proposed conceptual design and location of water quality monitoring points <br /> including those at the point of compliance (§2550.7) ; <br /> 2. Proposed monitoring parameters, constituents of concern, and their <br /> monitoring frequencies (§2550.7 and §2550.8) ; <br /> 3. Proposed concentration limits and/or methods for establishing concentration <br /> limits (§2550.4) ; and, <br /> 4. Proposed statistical methods for determining statistically significant <br /> evidence for a release from the WMU. <br /> The Discharger shall also propose a monitoring system and program pursuant to <br /> §2550. 10 of Chapter 15 for determining the effectiveness of any corrective <br /> actions. <br /> GROUND WATER MONITORING <br /> The existing ground water monitoring system consists of monitoring wells MW-1 , <br /> MW-2, and MW-3. MW-2 was reported to be the background well . The Discharger <br /> shall continue to monitor these wells for the constituents and parameters <br /> specified below at the specified frequency until the Discharger' s revised <br /> monitoring program is approved by the Board and the monitoring system is <br /> operational . <br /> Sampling <br /> Report in & Reporting <br /> Parameter/Constituent Units of Frequency <br /> Temperature °C Quarterly <br /> Turbidity N.T.U. Quarterly <br /> Specific Conductance (field) µmhos/cm Quarterly <br /> pH (field) pH units Quarterly <br /> Total Dissolved Solids mg/l Quarterly <br /> General Minerals mg/l Quarterly <br />