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Ara a.(91u0Y <br /> H o 1 <br /> :: �^..w _�� ® sew erect Ar•e. <br /> 66 <br /> • water Wells Sampled <br /> Oro.ne-water <br /> � - Flew Dlfeetlon <br /> r.. <br /> 0 <br /> 1/2 / <br /> MN M 2 Wa <br /> X. <br /> CHICO OT <br /> • SA A NTO <br /> DIT <br /> ,..,; <br /> Pp <br /> S <br /> ea <br /> 0 <br /> Fig.5.Map of Chico study area. <br /> for land area and dwelling units.The waste-water loading <br /> (inches/year)reflects the discharge from all existing waste- <br /> _=_ water systems, averaged over the entire study area. An <br /> ____===-=________ ' " assumption of 150 gpd/DU was used for this calculation. <br /> -=:MORRO_=______ -- <br /> MAY__ SANTA YSAVEI _ The final entry expresses the waste-water loadings I,a5 a <br /> fraction of the annual rainfall recharge,R,for each study <br /> __ _____ ` = ------DAYWD r' area(from Table 1). <br /> --- PARK <br /> Ground-Water Quality Data <br /> =_= In each of the three study areas,the effects of septic <br /> S systems on ground-water quality have been a concern of the <br /> RD. (" • local health department and the respective California <br /> LOS a Regional Water Quality Control Board(there are nine such <br /> •°g ,icer Regional Boards in California).As a result of these con- <br /> osoa qD cems, water quality sampling programs were conducted <br /> (DWR,1984;CSWRCB,1989;CRWQCB,1983/84;Questa, <br /> ,``4 -:s'�I 1987). Representative data compiled from these sampling <br /> programs are summarized in Table 3.BAYWOOD-LOS 0303 <br /> STUDY AREA— For the Bolinas Mesa area, some 30 ground-water <br /> {, <br /> monitoring wells were installed in the shallow marine terrace <br /> aquifer specifically for the purpose of monitoring septic <br /> 0114 112 VI 1 MI4 2 Mile. <br /> �1 I system effects on ground waters.Well locations are shown <br /> ware,weft Sampled « D....d-w.I.r FI..Direction on Figure 4. Samples were collected during the 1985-86 <br /> water year (October-September) and were analyzed for <br /> Fig.6.Map of Baywood-Los Osos study area. nitrate-nitrogen, ammonia, and total Kjeldahl nitrogen <br /> 495 <br />