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The nitrate concentration of rainfall was estimated to b4 1 mg/L-N antzsche and <br /> Finnemore, 1992). <br /> Quantity and Quality of Domestic Wastewater <br /> The estimated sewage flow rates for various uses are available from a number of <br /> references. The uses presented be ow guided by the San Joaquin County On-Site <br /> Wastewater isposal Standards ( 003), <br /> C <br /> ri sand Tchobanoglous (1998), and EPA <br /> (1980). Th refe rices indicate th t 13 gaa for each employee is typical for an office <br /> worker, a dr120 galtons per day is pica) r a bedroom; these rates were used for the <br /> vegetable ing facility (Crites an Tchoban, s, 1998). <br /> The estimated flow values discussed her should not a used for the design and sizing <br /> of the s The design and size Q#the- eptic system should utili a th San <br /> Iaquin County Environmental Health Sewage Standards which incorporat peak and <br /> surge flow fadfors. The estimates used in the Sewage Standards may be g ate than <br /> ose disc adssed here. <br /> According to information rbvidep by Mr. Costa, the proposed vegetable prose ng <br /> facility will be open fve six ys per week depending on the time of the year. No <br /> customers are pr The-following table describes the maximum expected us <br /> the facility over a period of a year. <br /> Table 4. Staff Level <br /> Staff Position Occu nc-y.,Level Days per week Months <br /> i <br /> Office 4-st 5 days per week 12 onths per year <br /> Growing Season (8 staff 6 days per week6 onths per year <br /> Staff April to October) <br /> Harvest Staff 30 per shift, two shifts, 6 days per week �3�nonths per year <br /> 60 per day maximum (August to October) <br /> Residences (4) 2 bedrooms each, 8 7 days per week 12 months per year <br /> bedrooms total <br /> A typical waste water concentration fF <br /> residentia e'ins 4.5'mg/L of nitrate as N (Crites <br /> T�1�obanoglous, 1998). A concof 85 g/L of nitrate as N is selected for <br /> staff workers rites and Tchobano s, 199 should be noted that the occupants <br /> 4-he-four-(4) residential units iil also a employees during a typical year. This factor <br /> was not cons idered._and�he st e water uses are double counted making the <br /> predicted ley conservativ in nature. <br /> LOGE1016 Page 10 <br /> E <br />