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February 10, 2005 <br /> NOA Project Number: E05001A <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage would be to serve the proposed community care home. No additional <br /> strictures are planned. Septic system design should be based on the On-Site Wastewater Disposal <br /> Standards or other engineering recommendations. <br /> Maximum expected usage would be for fourteen patients and.nine staff which occupy the building <br /> " each day. These assumptions are further discussed in Part II, Section 3, of the Nitrate Loading <br /> Study. <br /> F <br /> F1 4.0 GROUND WATER.INFORMATION <br /> ��� 4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the Site. <br /> The Fall 1998 and Spring 1999 maps are the most current official-reaps'available from the County. <br /> According to these maps (Plates 3-6),ground water lies betwee �10`and A feet below ground <br /> surface and flows at a gradient of 10 feet per mile to the north ir�-te vicinity of the Site. <br /> No g <br /> ..,,�,-.-..��.asf',ew� �P9�w.�-ter-� ^.:-a7 � ,'F � r+�� � rte' - •"fir• <br /> roundwater was e�counte�r�d��by;the.staff of Neil O:;:Andetson 8&Associates, Inc duing'tlze. <br /> -.., n•iaLr k � ` '''�`."}7�F rr ?- t(c'�'r 3}. j�a-' .+ees r�..` .�. '.," , ax a� � ' a "�fiYr <br /> g o£aY15 foot deep�so�l profile./.groundwater-boring near�the d�dleof� p�ope�ty�(Pla�t�x):. <br /> 4.2 Potential Ground Water Contamination Issues <br /> Identifying potential ground-water contamination sources was not part of the scope of work for the <br /> soil suitability study. Potential ground-water contamination can occur from a number of sources <br /> which often include leaky underground storage tanks, agricultural activities, dairies, septic systems, <br /> and storm water infiltration. Agricultural activities and the use of septic systems in the area should <br /> be considered potential.ground-water contamination sources. <br /> �-, .4.3 Water Sample Location <br /> No water sample was available for collection at this site due to the non-operating water well. The <br /> existing water well does not operate due to the disconnected power service to the property. In an <br /> Fiattempt, a 15 foot soil boring was excavated with a hand auger to sample the ground water directly. <br /> No shallow ground water was encountered, therefore no water sample was collected. <br /> Fi <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the USGS Geologic Map of the San Francisco - San Jose Quadrangle as the <br /> f' 1 $ <br /> A y - <br />