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AUG- 9-99 MON 8: 17 AM 7-H TECHNICAL SVC GRP FAX NO. 5302732290 P, 5 aerator functions and pumping cycles. The computerized panel shall have graphical representation of auto function in"real time" and for the ease and economics of operation management shall have the capability of transmitting the graphics and appropriate data to 7-14's Operation Management Stall', the Owners representative and the San Joauquin County Department of Environmental Health or other selected County Agency. 7. Depending on the"electrical power outage" history of the areas of installation, as an optional item the plants can be furnished with a diesel driven standby power generator. 8. The first phase plant furnished for the project will be sized at a nominal 20,000 gallons per day. This will allow the option to the owner of delaying the purchase of a second modular plant until such time as Phase#2 and/or Phase#3 comes on line. Effluent Disposal and/or Reclaimed Water Reuse: The disposal of effluent for this system is proposed to be a sub-surface irrigation water reuse system backed up by an interim inclement weather dry-well system_ A brief discussion of each method relative to location and appropriateness is as follows; Sub-surface Irrigation: This method of reclaimed water usage utilizes pressurized filtered plant effluent injected six (6)to(10) inches below the soil. Injection is through the use of"emitters" that are generally placed on two (2) foot centers. The emitters transmit water to the soil in a "drip" fashion through a grid tubular system. The actual rate of discharge per square foot area depends on the make up of the soil. For illustrative purposes the County reports that the soil in this area is a clay loam and sand, This material equates to a sub surface discharge rate of about 0.75 gallons per day per square foot. This rate utilizes a safety factor of twelve(12)without credit for evapo-transpiration(water uptake though plant growth). This method of effluent disposal/water-reuse has some very pronounced benefits as listed below; 1. No Public Health Risk. Since the effluent is injected below the ground, there is no risk of"Public Contact" with the water. This has been determined by the United States Public Health Services(USPHS)and the EPA. 2. In view of the underground injection, no effluent disinfection is required. This results in not only capital cost savings but has considerable impact on the facility Operation and Maintenance Costs savings. As is understood , Operation and Maintenance costs go on for the life of the facility. 3. Area selection of sub-surface irrigation can be of near any shape or size depending on the available volume of effluent to be disposed of Areas can be as narrow as three(3)feet wide, (parkway&greenbelt)or as large as selected set-back areas between the lots. 4. The type of sub-surface irrigation units utilized by 7-H have"emitters" that are impregnated with a root control chemical. This negates any roots from invading 4