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MONITORING AND REPORTING PR-jRAM NO. 97-229 - 3 - J.R. SIMPLOT LATHROP FACILITY SAN JOAQUIN COUNTY Point of Compliance The point of compliance for the surface impoundments is a vertical plane that extends through the uppermost aquifer underlying the surface impoundments and intersects the surface along the northern and western boundaries of the ponds. The monitoring wells LP-4, LP-5, LP-6 a compliance points for the intermediate zone (10 to 25 ft bgs). Wells LP-1 and LP-2 are poin of compliance for the upper zone (s 10 ft bgs). Monitoring well LP-7 is the background monitoring well for this monitoring program. The Basin Plan establishes the control of salinity as a high priority. The Regional Water Board issued a memorandum on 26 April 2007 setting forth guidance for the consistent management of salinity and the need to immediately begin addressing salinity in existing discharges. The discharge of any salinity above background discharged to land or water increases the invent of salt in the Region, that is, it increases the total salt contained in surface water, groundwate , and soil. Crop productivity drops with increasing soil salinity until farming becomes infeasible. Some types of salt can result in significant human health risks. For example, nitrates are a component of salt and pose a significant human health risk. This Order complies with the 26 April 2007 guidance memorandum. State Board Resolution No. 68-16 (Resolution 68-16) requires the Regional Water Board, in regulating the discharge of waste, to maintain high quality waters of the State until it is demonstrated that any change in water quality will be consistent with maximum benefit to th people of the State, will not unreasonably affect beneficial uses, and will not result in water quality less than that described in the State Water Board's policies (e.g., quality that exceeds water quality objectives). The Regional Water Board finds that the discharge, as allowed in these waste discharge requirements, is consistent with Resolution No. 68-16 since this Order does not allow discharges of waste that will degrade water quality to levels that unreasonably affect beneficial uses. If the discharge causes or threatens to cause degradation of water quality to levels that exceed water quality objectives, then the Discharger will be required to cease the discharge, implement source control, change the method of disposal, or take other action. Additional monitoring may be necessary to determine if degradation threatens beneficial uses. If beneficial uses are being impacted, the Discharger will need to implement source control for constituents that impact beneficial uses and may be required to undertake remedial actions.