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REGEWC) <br /> Nitrate Loading Calculations(continued) <br /> JAN 13 7071 <br /> Notes: <br /> ENVIRONMENTAL HEALTH <br /> 1.Ave Monthly precip.for Lodi,Western Regional Climate Center DEPARTMENT <br /> 2.Estimated Average monthly runoff volume;zero assumed for this site with full on-site retention of rainfall level site. <br /> 3."Available precip"equal to ave.monthly runoff volume precip minus estimed runoff volume. <br /> 4.Referenced Eto obtained from CIMIS Zone 12,Eastside Sacramento-San Joaquin Valley;Represents Value for lawns and other uniform turf areas. <br /> 5.Actual ET adjustment based on the site specific landscape/plant cover(fractional multiplier);see below for calculating"composite factor",0.55 for this site. <br /> 6.Net rainfall recharge("deep percolation")equal to Availbale precip(3)minus Actual ET(5);Negative values set to zero. <br /> Calculation of Composite of ETO Adjustment Factor for Hypothetical Residential lot <br /> a.Key reference:University of Cali.Division of Agriculture and Natural Resources:Estimating Landscape Water Requirements(Table 1) <br /> b.Site Development Conditions: <br /> Land Condition Fractional Plant Product <br /> Total Factor' <br /> Impervious Area 0.32 0.1 0.10 <br /> Trees,Shrubs Groundcovers 0.68 0.5 0.34 <br /> Lawn(Cool Season) 0 0.8 0.00 <br /> Herbaciuos Perrenials 0 0.5 0.00 <br /> Composite 1 0.44 <br /> 'Per Table)for applicable landscape categories for impervious area <br /> assume nominal 0.05 to 0.10 to account for evotranspiration of rainfall <br /> retained on paved surfaces,gutters,etc. <br /> Tabk 1.Piam Factors(PF)for established Iaod—pe Wants,turferasses, <br /> and garden crops to provUe acceptable Performance In Cailfornlar. <br /> PWt Type Plant Fartor <br /> 7tee,Siebe,Vines,Greirid.- <br /> 0.5 <br /> (woad,plants) <br /> Herbaceous Perendals 0.5 <br /> Desert Adapted Plans 0.3 <br /> ........... <br /> Arrxnl Flowers&eed6q Plants 0.8 <br /> Ce oral Tlegrass lawrfs,coobsesson(tat 0.813 <br /> fescue,KY.bWeprass,rve,berg <br /> Ger,ral rurtgrass tawre,warm-season <br /> (bermuda,Zoysia,St AuWFtare,buftlo) <br /> Horne Fruit crops,Dedduous 0.8 3 <br /> Home Fruit Crops,Everoroen 1.0 <br /> Horne veoetabb,Crops 1.03 <br /> Mbed Piarit o Fafelepki-dw A due 4d.plastW. <br /> rkA fAe AfgAmPF <br /> 1 Values do not apply to any plant production operations,such as nurseries,greenhouses,sod farms,or commercial farms. <br /> 2 Plant Factor shown is the annual average Kc value:monthly or seasonal Kc's may be available if more precision is desired. <br /> 3 Plant Factor does not apply to sports fields,golf greens or tees. <br /> a From UC reference;note plant factors are annual average values;additional refinement may be needed for seasonal crops. <br />