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October 30, 1987 <br /> California Regional Water Quality Control Hoard <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, CA 95827-3098 <br /> ATTN: Mr. Stephen S. Boll <br /> Area Engineer <br /> As per your request of October 16, 1987 which was based on an inspection <br /> dated August 27, 1987, the following is a report addressing the proposed <br /> mode of action regarding the industrial waste water treatment at the <br /> California Natural Product's facility located at 1250 E. Lathrop Road, <br /> Lathrop, California. <br /> Background <br /> California Natural Products (CNP) is a food manufacturing corporation which <br /> manufactures rice syrup, rice milk and rice syrup solids on a year round <br /> basis and dahlia syrup solids (from dahlia tubers) on a seasonal basis <br /> (November through March) . The facility produces a liquid waste from the <br /> rice syrup production which consists of colloidally suspended <br /> carbohydrate/protein/fat material which has been centrifugally removed from <br /> the hydrolyzed and sifted whole grain rice. The total suspended solids of <br /> the effluent from this line is approximately 18. During the dahlia season <br /> starting in November, waste water containing the washings and peelings of <br /> the dahlia tubers has been added to the existing rice plant waste water. <br /> The solid fiber material obtained from the rice syrup line as well as the <br /> dahlia process are valuable food materials (currently undergoing animal <br /> feeding studies as well as marketing studies) and are not considered a solid <br /> waste material. <br /> Waste water from the plant was pumped via earthen ditches to a facultative <br /> lagoon with a capacity of 565,000 gallons. The effluent from the lagoon <br /> upon mixing with well water was used in the irrigation of the 14 acres on- <br /> site. Since CNP is a food processing plant, only food grade materials are <br /> employed and consequently there is no concern for toxic waste. <br /> Problem Description <br /> During the latter part of the summer of 1987, a decrease in water discharge <br /> was made from the rice syrup plant (based on a recycling of vacuum pump <br /> water) . The decrease in water volume caused a problem with the existing <br /> lagoon exposing the anaerobic sludge resulting in a detectable odor problem. <br /> CALIFORNIA NATURAL PRODUCTS, P. O. Box 139, MANTECA, CALIFORNIA 95336 (209) 858-2525 <br />