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ROSE ' S Engineering - Geology & Survey Inc. 9070 Elk Grove Blvd., Elk Grove, CA 95624 (916) 686-5445 April 5, 1993 Isaac Kaing, Area Engineer 3443 Routier Road, Suite A Sacramento, CA 9582f3098 RE: Reply to correspondence 12 Mach 1993 , Barnyard RV Park and Business Complex, San Joaquin County. Dear Mr. Kaing: Enclosed is our reply to your concerns in the above mentioned correspondence. 1. Reclamation Water Management Plan: We have stated in the original application the system of reclaiming the wastewater. Also, included was an explanation of using the tertiary reclaimed water for irrigation of the planter strips along with the Interstate 5 side slope for a distance of 2000 feet. Cal Tans has given us the green light on preparing a plan to landscape and irrigate the slopes. The total area to be irrigated is 148 , 071 square feet or approximately 3 .5 acres. During the summer months each irrigation period will dispose of more than the daily input. The irrigation periods can be every other day or even every third day. The attached exhibit show the water balance. The pond storage based on 45, 105 gallons per day would be 30. 5 days. However, if we take the wet months into consideration using 29 , 105 gallons per day the storage capacity may be stretched to 47 days. The balance sheet shows the necessity to apply some potable water during the dry 'months to keep the vegetation green. The reclaimed water has to be used on the highway slopes, therefore, the potable water will be used on site. It must be noted the RV Park will have only minimum use during the wet months and therefore, not included in the reclaimed water for disposal . The amount of water for irrigation certainly is less. As long as we have some non rainy days during the month, water can be dispersed extending the holding capacity of the pond. Calculation show the pond capacity, - during the winter, to be for 47 days maximum and for 30 days during the summer flow. Included with Exhibit A we have Chapter 900 Landscape Architecture Plan for Cal Trans. The over all planting on the slopes will be done by a licensed landscape architect and will be approved by Cal Trans. 2 . Sludge Management: The sludge production is explained in the original application and as stated it is calculated according to Dr. Kerri formula given in the books he authored. The sludge- is removed only when the settleometer reading is over 50%. Otherwise we continue to circulate it as a food source for new cell growth.