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March 19, 2004 <br /> NOA Project Number: E0415A <br /> Page 5 <br /> Since Crites and Tchobanoglous (1998) information is the most current available, our office <br /> believes it provides the best estimate of waste water flow for the office worker category. <br /> The rates presented from the references provide general guidance but do not always reflect a <br /> match in usage. Careful examination,professional judgement, and experience are necessary to <br /> select a reasonable flow rate estimate. The flow rates selected for the uses associated with this <br /> facility are presented in the following table. <br /> Table 2. <br /> Typical Quantity of Effluent for Various Sources. <br /> Category Total People Average Quantity Average Daily Flow <br /> per Day per Person Per Parcel <br /> San Joaquin Electric, 10 13 gal/day/person 10 employee/day* 130 gpd/person <br /> full time office employees = 130 gpd <br /> Average daily flow: 130 gpd <br /> Notes —gpd is gallons per day. <br /> ow, The daily waste water quantity is estimated to be 130 gallons per day. Waste water quality is <br /> discussed within the nitrate loading section of the report. <br /> am <br /> 4.0 GROUND WATER INFORMATION <br /> bw 4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the <br /> Site. The Fall 1998 and Spring 1999 maps are the most current maps available from the county. <br /> According to these maps (Plates 2 through 5), ground water lies between 50 and 60 feet below <br /> ground surface in the vicinity of the Site and flows to the northeast at a rate of approximately 13 <br /> eet per mile during the fall; groundwater direction and gradient were not well defined in the <br /> ` spring map. <br /> 4.2 On-Site Ground Water <br /> No wells exist on the property. No ground water was encountered by the staff of Neil O. <br /> Anderson &Associates, Inc. during the drilling of percolation test holes to a depth of 22 feet in <br /> ` early March, 2004. <br /> f <br /> 61 <br /> V <br />