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It is our opinion that contamination originating from the existing septic tank and leachfield on <br /> Parcel 1 is unlikely since they are crossgradient from the domestic well. The leachfeld is <br /> upgradient to the domestic well for Designated Remainder, although it is obvious there has not <br /> been nitrate impact to the well. Construction details of the wells are unknown, but it is assumed . <br /> to be routed to 100 feet. Contamination from a septic tank and leachfield are usually dependent <br /> upon the age and type of tank construction material. The density of septic systems in the <br /> surrounding area can also be considered very low. The density of septic systems is one of the <br /> prime factors for nitrate contamination of the underlying groundwater. If high nitrate <br /> concentrations exists in the underlying aquifers, it is most likely from agricultural inputs. <br /> Asbestos containing materials (ACMs) testing from any portion of the existing buildings is <br /> outside the scope of this investigation. If the existing residential structure is ever demolished or <br /> remodeled, testing for ACMs should be done at that time. j; <br /> Dane 71�/0> <br /> LIMITATIONS "7�;•� /� �.rw� Seo/ <br /> The purpose of this report is only to inform the Client and the San Joaquin County <br /> Environmental Health Department of the environmental conditions as they currently exist at the <br /> subject site and within the parameters established in the County Ordinances. Valley Ag <br /> Research does not assume responsibility for the discovery and elimination of environmental <br /> hazards. Compliance with submitted recommendations and/or suggestions in no way assures <br /> mitigation or elimination of environmental concerns. <br /> No statement can be made with scientific certainty regarding latent surface or subsurface <br /> conditions which may have originated on-site, or off-site from various sources. We cannot <br /> represent the subject property, adjacent land or underlying groundwater free from environmental <br /> hazards. The possibility always exists for contaminants to be placed or migrate through the soil, <br /> surface water, groundwater or air at any po' <br /> Respectfully submitted, �� �a�' Ch` s , '.. <br /> ° No. 04675 <br /> VALLEY Ag RESEARCH <br /> Expires: <br /> �� <br /> Don Chesney, R.E. CA� <br /> Registered Environmental Assessor# 4675 <br /> Agricultural Pest Control Advisor# 6237 <br /> 5 <br /> Va[ky Ag Research <br />