Laserfiche WebLink
WASTE DISCHARGE REQUIRES ORDER NO. 5-01-251 • 6 <br /> CITY OF LATHROP AND CROSSROADS CREA LLC <br /> WASTEWATER TREATMENT PLANT NO. 1 (CROSSROADS),SAN JOAQUIN COUNTY <br /> 32. Total coliform organisms were detected in all groundwater samples collected from the five wells <br /> located in the proposed land application areas or nearby areas. The laboratory report did not <br /> provide an estimated number of organisms per 100 ml sample. The wells have not been <br /> disinfected; based on the results of additional groundwater sample events, disinfection of the wells <br /> may be required. To protect groundwater quality, disinfection of the wastewater may also be <br /> required. <br /> 33. Groundwater monitoring data indicates that groundwater quality in the proposed land application <br /> areas is impacted by dissolved solids; additionally,nitrate is elevated at Well MW-4. Background <br /> groundwater quality may be best represented by the samples collected from Well MW-5, which is <br /> upgradient of the proposed land application areas and wastewater treatment facility. The source of <br /> the contaminants in the groundwater in the land application areas is uncertain, but may be a result <br /> of previous land use. <br /> 34. This Order requires that the Discharger continue groundwater monitoring and complete a technical <br /> analysis of groundwater monitoring data to determine applicable background concentrations and the <br /> nature and extent of groundwater impacts attributable to the discharge, if any. <br /> Groundwater Degradation <br /> 35. State Water Resources Control Board (SWRCB) Resolution No. 68-16 (hereafter Resolution 68-16 <br /> or the "Antidegradation Policy") requires the Board in regulating the discharge of waste to maintain <br /> high quality waters of the state until it is demonstrated that any change in quality will be consistent <br /> with maximum benefit to the people of the State,will not unreasonably affect beneficial uses, and <br /> will not result in water quality less than that described in the Board's policies (e.g., quality that <br /> exceeds water quality objectives). <br /> 36. The Board finds that some degradation of groundwater beneath the wastewater treatment plant and <br /> storage ponds (excluding the effluent recycling areas) is consistent with Resolution 68-16 provided <br /> that: <br /> a. The degradation is confined within a specified boundary; <br /> b. The discharger minimizes the degradation by fully implementing, regularly maintaining, and <br /> optimally operating best practicable treatment and control (BPTC) measures; <br /> c. The degradation is limited to waste constituents typically encountered in municipal wastewater <br /> as specified in the groundwater limitations in this Order; and <br /> d. The degradation does not result in water quality less than that prescribed in the Basin Plan. <br /> 37. Some degradation of groundwater by some of the typical waste constituents released with discharge <br /> from a municipal wastewater utility after effective source control,treatment, and control is consistent <br /> with maximum benefit to the people of California. The technology, energy, water recycling, and <br /> waste management advantages of municipal utility service far exceed any benefits derived from a <br /> community otherwise reliant on numerous concentrated individual wastewater systems, and the <br />