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o 'WOO <br /> Mr. Sandi De Jong <br /> September 25,2003 <br /> Page 6 <br /> Waste water quality is discussed within the nitrate loading section of the report. <br /> 4.0 GROUND WATER INFORMATION <br /> 4114.1 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 <br /> Site. The Fall 1998 and Spring 1999 maps are the most current maps available from the county. <br /> According to these maps (Plates 2-5), ground water lies between 70 and 80 feet below ground <br /> surface in the vicinity of the Site and flows to the east and northeast at a rate between 10 to 13 <br /> feet per mile. <br /> 4.2 n-Site Ground Water <br /> No water wells are known to exist on the property. <br /> No ground water was encountered by the staff of Neil O. Anderson &Associates, Inc. during <br /> drilling to a depth of 15 feet on July 11, 2003. <br /> 4.3 otential Ground Water Contamination Issues <br /> An inspection of the site indicates the site is essentially bare and undeveloped. The site is <br /> fenced. There are no visible sources or objects on the property which have the potential to <br /> contaminate ground water. A gasoline station is located to the north of the property. No motor <br /> repair facility, commercial printing facility, dry cleaner,photo developing laboratory,junkyard or <br /> landfill,or as a waste treatment, storage, disposal,processing, or recycling facility is known to <br /> adjoin the property. <br /> Directly east of the site is a mobile home park which disposes sewage through a septic system. <br /> The Lodi Airport has fuel storage tanks which may be a potential source of ground water <br /> pollution. The potential impact to ground water from these sources is unknown. These potential <br /> sources should be viewed as not unusual or uncommon. <br /> Within 1 square mile of the site, there are a number of potential ground-water contamination <br /> sources that are not unique to the county. Offsite sources of nitrate pollution in San Joaquin <br /> County often include animal waste from dairies,agricultural fertilizers, and septic system <br /> effluent. There are no known dairies near the site. Septic system waste water and agricultural <br /> pE RSO <br /> Z <br /> O � <br /> �'tS OLS <br />