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[5] LOCAL SURFACE WATER AND GROUNDWATER INFORMATION Distance requirements pertaining to the orientation of the entire septic and well systems for each of the four parcels must be strictly adhered to, so as to prevent any potential contamination by sewage effluent into the underlying groundwater. The 1991 "Lines of Equal Depth of Water in Wells" map produced by the San Joaquin County Flood Control and Water Conservation District indicates that static water elevation is located at approximately 85 feet in the area of the subject site. A water level measurement on the domestic well that services the SFR on the subject property confirmed this depth with a measurement of 84 feet. The exploratory boring drilled to a depth of 25 feet in the middle of the subject site, reveals no indication of saturated soil . However, the soil was moist, due most probably from irrigation water. There was no evidence of a past history of groundwater at this depth, such as soil mottling or rustiness. The groundwater flow appears to be towards the north, although many factors can influence a localized groundwater directional flow. The Flood Insurance Rate Maps (FIRM) , dated May 15, 1990 were reviewed at the San Joaquin County Flood Control and Water Conservation District office. These maps indicate that the subject property is not in a Zone A which is the 100 yr flood plain. It is recommended that the Engineer-of-Record for any project development survey the subject property closely to assess any potential for flooding. Groundwater chemical analyses were performed in accordance to the requirements of the Conditions of Approval. Nitrate, Dibromochloropropane (DBCP) , and Ethylene Dibromide (EDB) concentrations were the three constituents analyzed in the underlying groundwater. Sampling was conducted on June 23 , 1992 from the domestic well at the subject site SFR. Sampling procedures were performed in accordance to Environmental Protection 4 .Y S �l ! *ali, (,ontrol Inspecticm