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March 8, 2005 NOA PROJECT NUMBER E04070B 5.0 OTHER WASTE STREAMS Domestic wastewater is discharged to a septic system that is permitted by San Joaquin County Environmental Health Department. Domestic wastewater is not co-mingled with the process water. 6.0 GROUNDWATER CONDITIONS Groundwater was sampled from the domestic well at the site. It contained a concentration of 4.0 mg/L of nitrate as nitrogen. The toxicity objective in the Basin Plan applies to all groundwater, which states; in part"ground waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life associated with the designated beneficial uses." The cancer potency factor for oral exposure to chloroform in this database is 0.031 mg/kg body weight per day. This concentration is equivalent to a concentration in drinking water of 1.1 µg/L (ppb) at the 1 in-a-million-cancer risk level. Chloroform was detected in MPF's wastewater at less than .05 to 35.6 gg/L in 2004, well in excess of the I.1 Vg/L human toxicity value. Now with the treatment process in effect, the concentrations are projected to be much smaller. 7.0 BASIN PLAN,BENEFICIAL USES, AND REGULATORY CONSIDERATIONS State.Water Resources Control Board(State Board) Resolution No 68-16 requires that the discharge meet waste discharge requirements.whi.ch will result in Best Practices Terminal Control (BPTC) of the discharge to assure that pollution or nuisance will not occur and the highest water quality consistent with the maximum benefit to the people of the United States be maintained. Background groundwater conditions are not et defined at the and or land application area as g g Y p pp the specific quality of the wastewater has not been characterized. If the discharge will cause an increase then the discharger may be required to cease the discharge, implement source control, change the method of disposal or take other action as needed to prevent ground water degradation. This order establishes effluent limitations that are protective of the beneficial uses of the underlying groundwater and requires groundwater monitoring to evaluate whether the discharge of waste is impacting the groundwater quality. 8.0 OPERATIONS AND MAINTENANCE PLAN (OMP) Excessive application of food processing wastewater to land application areas can create objectionable odors, soil conditions that are harmful to crops, and degradation of underlying groundwater by overloading the shallow soils profile and causing waste or soil constituents (organic carbon, nitrate, dissolved solids, and metals)to percolate below the root zone. If sufficient information becomes available, this OMP may be revised to further reduce the loading rates as appropriate. If the MPF is unable to modify its waste stream or application methods such that groundwater quality will not be impacted,then the Board would be required to classify the waste as designated waste and require full containment under Title 27 of the CA Code of Regulations (CCR), Division 2, Subdivision 1, beginning with Section 20005 (hereafter Title 27) 3