Laserfiche WebLink
WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0148 - 13- <br /> MUSCO FAMILY OLIVE COMPANY AND THE STUDLEY COMPANY <br /> WASTEWATER TREATMENT AND LAND DISPOSAL FACILITY <br /> SAN JOAQUIN COUNTY <br /> the Board determines an adverse change is consistent with Resolution 68-16. Resolution 68-16 <br /> requires the Board to regulate waste discharges in a manner that maintains high quality waters of <br /> the State. Any change in quality can only occur after full application of best practicable treatment <br /> and control (BPTC) of the waste and must be consistent with maximum benefit to the people of <br /> the State, not unreasonably affect a beneficial use, and not result in water that exceeds a water <br /> quality objective. <br /> 64. To protect the designated use of municipal and domestic supply, water quality objectives <br /> correspond to maximum contaminant levels (MCLS) specified in the provisions of Title 22, <br /> California Code of Regulations. <br /> 65. Protection of agricultural supply requires consideration of narrative objectives and translators. <br /> Guidelines for identifying the quality of irrigation water necessary to sustain various crops were <br /> compiled by Ayers and Westcot in 1985 (Food and Agriculture Organization of the United Nations <br /> —Irrigation Drainage Paper No. 29). The Agricultural Guidelines estimate the potential hazards to <br /> crop production associated with long term use of the particular water being evaluated. The <br /> Agricultural Guidelines categorize ranges of concentration of each constituent as having"No <br /> Problem—Increasing Problems—Severe Problems"based on large numbers of field studies and <br /> observations, and carefully controlled greenhouse and small plot research. In general, crops <br /> sensitive to sodium or chloride are most sensitive to foliar absorption from sprinkler-applied <br /> water. Bicarbonate causes problems when fruit crops or nursery crops are sprinkler irrigated during <br /> periods of very low humidity and high evaporation. The following table contains numerical <br /> criteria from the Agricultural Guidelines identified as necessary for protection of a range of crops <br /> under various circumstances,but the most stringent is not necessarily the concentration that <br /> assures no adverse affect on any nonagricultural beneficial use: <br /> Increasin¢ <br /> Problem and Related Constituent No Problem Problem <br /> Salinity of Irrigation Water(EC, µmhos/cm) <700 700-3,000 <br /> Salinity of Irrigation Water(TDS,mg/L)* <450 450-2,000 <br /> Specific Ion Toxicity <br /> from Root absorption <br /> Sodium(mg/L) <69 69-207 <br /> Chloride (mg/L) < 142 142—355 <br /> Boron(mg/L) <0.5 0.5-2.0 <br /> from Foliar Absorption <br /> Sodium(mg/L) <69 >69 <br /> Chloride(mg/L) < 106 > 106 <br /> Miscellaneous <br /> NH4-N(mg/L) (for sensitive crops) <5 5-30 <br /> NO3-N(mg/L) (for sensitive crops) <5 5-30 <br /> HCO3 (mg/L) (only with overhead sprinklers) <90 90 - 520 <br /> pH normal range =6.5—8.4 <br /> * Assumes an EC:TDS ratio of 0.6:1 <br />