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Un <br /> ::woodDovolopod <br /> A a (Study <br /> y Area) <br /> "N :%:<!.::> ^..�N"-"�� ® Sewered Aroma <br /> <7 <br /> Water We%*Sampled <br /> X ........ <br /> X <br /> Ground-Water <br /> Flow DIrection <br /> 44F e <br /> X: 0 1/2 1 Milo <br /> 2M <br /> Ilea <br /> 180 OT <br /> MTN T 0 <br /> HUMBUG Oil <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 /> N <br /> . . . assumption of 150 gpd/DU was used for this calculation. <br /> MORRO <br /> YSADEL -water loading, 1, as a <br /> -_:BAYThe final entry expresses the waste <br /> fraction of the annual rainfall recharge, R,for each study <br /> ------B A Y W O O D 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 /> AF systems on ground-water quality have been a concern of the <br /> FIG. • local health department and the respective California <br /> LOS Regional Water Quality Control Board(there are nine such <br /> 0 0608 <br /> AL,ey Regional Boards in California). As a result of these con- <br /> LOS '90, cern, water quality sampling programs were conducted <br /> 0808 <br /> (DWR,1984;CSWRCB,1989;CRWQCB,1983/84;Questa, <br /> 1987). Representative data compiled from these sampling <br /> programs are summarized in Table 3. <br /> BAYWOOD-LOS OSOS For the Bolinas Mesa area, some 30 ground-water <br /> STUDY AREA: <br /> _1 monitoring wells were installed in the shallow marine terrace <br /> aquifer specifically for the purpose of monitoring septic <br /> 0 1/4 112 314 1 Milo 2 Miles <br /> system effects on ground waters. Well locations are shown <br /> on Figure 4. Samples were collected during the 1985-86 <br /> 0 Wot4w Web Sampled around-Water Flow Direction water year (October-September) and were analyzed for <br /> Fig.6.Map of Baywood-Los Osm study area. nitrate-nitrogen, ammonia, and total Kjeldahl nitrogen <br /> 495 <br />