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CONCLUSIONS AND RECOMMENDATIONS <br /> From,visual observations;-there is no surface contamination. The probability of subsurface <br /> contamination from pesticides can be considered low- to-nonexistent, considering the <br /> environmental fate data and soil type. Therefore, at this point in time, no corrective action is <br /> required within the boundaries of the subject property. <br /> The domestic well that serves the Costa's residence will be tested.for.nitrate and DBCP.to <br /> complete that part of the Soil.Suitability Study. Further information on this well will be <br /> addressed in the Soil Suitability Study. Therefore, at this point in time, we do not recommend <br /> the well water be tested for a multi-residue pesticide screen consisting of analysis for <br /> Dinitroanaline, Triazine, Organochlorine and Organophosphates. <br /> Regardless of the nitrate concentration of the groundwater, it is recommended that bottled water <br /> be used for drinking and cooking in areas that have domestic wells in intensely farmed areas. <br /> It is our opinion that contamination originating from the existing septic tank and leachfield is <br /> unlikely since the domestic well is relatively cross gradient to the groundwater.directional:flow. <br /> Contamination from a tank is usually dependent upon the age and type of tank construction <br /> material. Since the tank is comparatively new and should be watertight, there should be no <br /> problems with it. <br /> The density of septic systems in the surrounding area can also be considered very low. The <br /> density of septic systems is one of the primary factors for nitrate contamination originating from <br /> septic effluent, of the underlying groundwater. <br /> Asbestos containing materials (ACMs) testing from any portion of the Costa's residence is <br /> outside the scope of this investigation. Since the house is only ten years old, there should be no <br /> ACMs. <br /> Page -5- <br /> vaffey AB Research <br />