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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. 5-01-145 <br /> FOR <br /> KNIFE RIVER CORPORATION DBA KRC AGGREGATES <br /> AGGREGATE MINE AND WASTEWATER SYSTEM <br /> SAN JOAQUIN COUNTY <br /> This Monitoring and Reporting Program(MRP) describes requirements for monitoring industrial <br /> wastewater. This MRP is issued pursuant to Water Code Section 13267. The Discharger shall not <br /> implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. <br /> 3 <br /> Specific sample station,locations shall be approved by Regional Board staff prior to implementation of <br /> sampling activities. <br /> All samples should be representative of the volume and nature of the discharge or matrix of material <br /> sampled. The time, date, and location of each grab sample shall be recorded on the sample chain of <br /> custody form. <br /> FREEBOARD MONITORING <br /> All storrriwater and process water ponds shall be inspected weekly and freeboard determined_ <br /> Sampling Reporting <br /> Constituents Units Type of Sample Frequency Frequencv <br /> f Freeboard Feet Measurement Weekly Monthly <br /> EFFLUENT MONITORING <br /> Wastewater effluent samples shall be collected at the influent to the fast settling pond. Grab samples <br /> are considered adequately composited to represent the effluent. Monitoring for individual parameters <br /> is required based on the site activities. Sample locations shall be established as necessary to determine <br /> ! effluent quality at all potential source areas. <br /> Constituents Units Type of Sample Sampling Reporting <br /> Fre uencv Frequencv <br /> Total Flow3 gpd Cumulative Daily Monthly <br /> Total Dissolved Solids nig/1 Grab Monthly Monthly <br /> pH 2,3 Std. Grab Monthly Monthly <br /> Total Petroleum Hydrocarbons 3.4 mg/l Grab Monthly Monthly ul,w <br /> I Flow monitoring is required by 21 September 2001. <br /> Z Monitoring only required when flocculent is added to wastewater or when a concrete plant is in operation. <br /> 3 Monitoring only required when asphalt plant in operation- <br /> 4 TPH shall be performed by EPA Method 8015-m for diesel range hydrocarbons. <br />