Laserfiche WebLink
Fi <br /> nMarch 16, 2006 <br /> NOA Project Number: E06011A <br /> I <br /> 3.3.2 Agricultural Contribution <br /> ! 1 No agricultural contribution was considered since the site is vacant. <br /> ! 3.4 Future On-Site Sources of Nitrate <br /> F13.4.1 Quantity and Quality ofDomestic Wastewater From Proposed Project <br /> The following discussion is for determining the long-term waste water flow generated from the <br /> proposed residences for the nitrate loading analysis and should not be used for septic system design <br /> purposes. Typically, use estimates for the sizing of septic systems include a peak use factor,whereas <br /> Fjthe numbers discussed here are based on long-term averages. <br /> It is likelythat a two to three bedroom home will be built on the Site. For this calculation o a three <br /> bedroom home will be used. A three bedroom home is presumed to be occupied by up to four i <br /> people over the long term. A second dwelling unit, occupied by a potential three people, could be <br /> 1 placed on the lot as well. Therefore, a total of seven people per parcel will be used to calculate the <br /> residential septic tank usage for the parcels. <br /> According to Mrs. Grace Segura, a second dwelling unit is not included in the proposed <br /> development. Therefore, a calculation will be included to show the scenario of a two to three r <br /> Fibedroom home occupied by four people over the long term without a second dwelling unit. <br /> The estimated sewage flow rates for use categories are available from a number of references. The <br /> ' uses presented below were guided by the San Joaquin County On-Site Vastewater Disposal Standards <br /> (2003), Crites and Tchobanoglous (1998), and EPA (1980). The text from Crites and Tchobanoglous <br /> (1998) (Table 4-2) indicates that the typical residential use rate is 70 gallons per day. The EPA ` <br /> (19 80) Design Manual (Table 4-6) indicates the typical use rate is 45 gallons per day for a resident. <br /> The following tables present the septic waste water uses associated with the Site. The rates <br /> presented from the references provide general guidance but do not always reflect a match in usage. <br /> Careful examination,professional judgement, and experience are necessary to select a reasonable <br /> flow rate estimate. The flow rates selected for maximum uses associated with this project are <br /> Rpresented in the following table. <br /> ri <br /> F1 <br /> F! 4 <br />