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r <br /> MACHADO PROPERTY Page 12 <br /> WKA No. 6078.02 <br /> November 1, 2004 <br /> California Division of Oil and Gas <br /> During our review of DOG Map 606 and 608, we determined that the subject property is not <br /> located within a designated Natural Gas Field. No listed plugged and abandoned DOG wells <br /> were located with one-half mile of the subject property. <br /> CONCLUSIONS <br /> Our historic land use research,which included reviews of topographic maps dating back to 1914, <br /> and historical aerial photography, reveals that the majority-area of the property has supported <br /> lands cultivated in dry-farmed crops, irrigated pastures and hay crop. We observed no evidence <br /> of bulk storage or production of hazardous materials during our windshield survey of the <br /> property surroundings. <br /> We identified no state or federal Superfund sites within a one-mile radius of the subject property. <br /> We identified no known agency-listed contaminated sites on or within one-half mile of the <br /> subject property. With regard to the former crude oil pipeline, we recommend that site access be <br /> granted so further investigation can be performed to identify the potential for contamination <br /> originating from the pipeline to impact the subject property. We identified no known regional <br /> impairments to groundwater quality beneath or in the vicinity of the subject property during <br /> review of the regulatory agency databases described in this report. <br /> The subject property contains at least one known water supply wells. If the well will cease to be <br /> used,the water supply well must be properly abandoned; this procedure requires a well <br /> abandonment permit for each well from the San Joaquin County Environmental Management <br /> Department, Environmental Health Division. The existing residences on the subject property are <br /> and/or were serviced by at least two or more on-site septic systems. The septic systems are <br /> unlikely to have affected subsurface soils with hazardous materials, based on expected residential <br /> waste effluent as opposed to commercial or industrial wastewater discharges. When the property <br /> is redeveloped, each of the septic systems and associated leach fields and/or dry wells must be <br /> properly abandoned in accordance with the recommendations of a qualified geotechnical <br /> engineer. <br /> 0 <br /> NNNS <br /> WALL nce.VUFfL <br />