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MONITORING AND REPORTI&ROGRAM ORDER NO. -4- CITY 4- CITY OF ESCALON WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY monitoring done more frequently than required at the locations specified in the Monitoring and Reporting Program shall be reported in the next scheduled monitoring report. The results of all monitoring performed by the industrial dischargers, or other parties, which are reported to the Discharger, shall be included in the next regularly scheduled monitoring report. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all groundwater monitoring reports shall be prepared under the direct supervision of a registered professional engineer or geologist and signed by the registered professional. A. Monthly Monitoring Reports Monthly reports for industrial wastewater ponds shall be submitted to the Regional Board by the 1"day of the second month following sampling (i.e. the January Report is due by 1 March). Monthly reports for the months of March, June, September, and December may be submitted as part of the Quarterly Monitoring Report. Monthly monitoring reports shall contain all monitoring data required as described above for domestic and industrial wastewater. B. Quarterly Monitoring Reports Quarterly Monitoring Reports shall be submitted to the Regional Board by the 1St day of February, May,August, and November. The Quarterly Report shall include the results of all regular monthly monitoring data generated and the results of groundwater and surface water monitoring performed. At a minimum, the report shall contain: 1. A narrative description of all preparatory, monitoring, sampling, and analytical testing activities. The narrative shall be sufficiently detailed to verify compliance with the WDRs, this MRP, and the Standard Provisions and Reporting Requirements. The narrative shall be supported by field logs for each well documenting depth to groundwater; parameters measured before, during, and after purging; method of purging; calculation of the casing volume; and total volume of water purged. 2. Calculation of groundwater elevations, an assessment of the groundwater flow direction and gradient on the date of measurement, comparison to previous flow direction and gradient data, and discussion of seasonal trends, if any. 3. A narrative discussion of the analytical results for all media and locations monitored, including spatial and temporal trends, with reference to summary data tables, graphs, and appended analytical reports (as applicable). 4. A comparison of monitoring data to the discharge specifications, groundwater limitations, and surface water limitations, and explanation of any violation of those requirements. 5. Summary data tables of historical and current water table elevations and analytical results. 6. A scaled map showing relevant structures and features of the facility, the locations of monitoring wells and other sampling stations, and groundwater elevation contours referenced to mean sea level datum.