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1 Vulaid Foods in Ripon <br /> Subsurface Soil & Groundwater In estigation <br /> The laboratory samples did not have headspace and were immediately sealed in <br /> their liners using plastic caps. The remaining sample was removed from its liner to <br /> be used as an aide to the on-site geologist in logging the material at that depth. <br /> All soil samples were delivered, under chain of custody, to an analytical laboratory <br /> licensed by the State of California for hazardous materials work. The samples were <br /> analyzed for Total Petroleum Hydrocarbons (gasoline & diesel), BTEX and MTBE <br /> by Method 8020. Analyses were conducted by GeoAnalytical Laboratories, Inc., in <br /> Modesto, California. <br /> Rinse water was removed by the driller, V&W Drilling, Inc. Drill cuttings are not <br /> produced by this method. <br /> 2.3 Groundwater Sampling <br /> All sampling equipment, including the stainless steel Geoprobe' screen point, used <br /> by sampling personnel, was disassembled and steam cleaned prior to <br /> commencement of sampling. These procedures were also followed between each <br /> boring. <br /> The groundwater samples were analyzed, or extracted, within 14 days according to <br /> their EPA methods. The samples were analyzed for Total Petroleum Hydrocarbons <br /> (gasoline & diesel), BTX&E (Benzene, Toluene, Xylene, and Ethyl Benzene) and <br /> the MTBE by EPA Method 602. Analysis was conducted by GeoAnalytical <br /> Laboratories, Inc. in Modesto, California. <br /> 3.0 CONCLUSIONS <br /> The soil and groundwater surrounding the former tanks at this site contain very low <br /> concentrations of diesel and trace levels of benzene and toluene. The concentrations of <br /> diesel were much lower than what was found in the soil directly under the tank when it <br /> was removed. Benzene and toluene in the groundwater were at levels slightly above <br /> detection limits. We believe that these concentrations of contaminants represent the <br /> approximate limits of any soil or groundwater plume and, on behalf of Nulaid Foods, <br /> request closure of this case. <br /> The above represents our best professional opinion as to environmental conditions at this <br /> site. These opinions were derived using data at hand, and standards of care common to <br /> the environmental consulting community in Northern California. There is the possibility <br /> that even with proper application of the above methodologies, there may exist on the <br /> subject property conditions that could not be identified within the scope of this sampling <br /> work or which were not reasonably identifiable from the available information. <br /> The methodologies included in this report are not intended to produce all inclusive or <br /> comprehensive results, but rather to provide the client with information regarding <br /> apparent suspicions of existing and potential adverse environmental conditions relating to <br /> 3 <br />