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Kennedy/Jenks/Chilton <br /> Mr. Charles Whitworth <br /> Cal-Farm Supply <br /> 14 July 1989 <br /> Page 3 <br /> 1 <br /> f <br /> this material indicated that there was a potential for the chemical dioxin to <br /> be present. Therefore, on the basis of this information revealed to us after <br /> the initial work plan was prepared, dioxin analyses were added to the work <br /> plan for two of the soil samples collected in the yard and for two wipe <br /> i samples collected inside the warehouse building. <br /> Several visits to the site were made prior to the site investigation to gather <br /> -� information about access to the site and the availability of utilities <br /> required for drilling. On one visit, an above ground fuel dispensing pump was <br /> noted which was presumably connected to an underground fuel storage tank. <br /> Further discussion with a past Cal -Farm employee indicated that this tank <br /> previously contained diesel fuel . Also, it was alleged by a Geiger Auction <br /> A employee that a second underground fuel storage tank may be present at the <br /> site near the warehouse building. On the basis of this report, an additional <br /> soil boring and monitoring well were added to the work plan. <br /> On all our visits to the site, the warehouse appeared to be empty. However, <br /> several labels remained on the storage shelves The labels apparently <br /> referred to the chemical products previously stored in the warehouse. This <br /> information was used to determine the pesticide analyses performed during this <br /> preliminary site investigation. <br /> In summary, this investigation was intended to determine the following: <br /> a o The possible source of nitrates previously detected in soils and <br /> groundwater. <br /> o The possible source of petroleum hydrocarbons previously detected in <br /> groundwater. <br /> o The distribution of pesticides in the storage yard and warehouse <br /> building <br /> o The contents of three storage trailers on the site. <br /> FIELD INVESTIGATIONS <br /> Introduction <br /> .' On 5, 6, and 7 April 1989 two soil borings (B-1 and B-2) and four groundwater <br /> monitoring wells (MW-1, MW-2, MW-3, and MW-4) were drilled on the Cal -Farm <br /> Supply property The monitoring wells were screened in the saturated zone <br /> encountered at approximately 10 to 20 feet below the ground surface to <br /> characterize the extent of chemicals previously detected in the reconnaissance <br /> groundwater sample collected by Roy F Weston, Inc Borings B-1 and B-2 were <br /> drilled in the suspected vicinity of two reported underground fuel storage <br /> I <br /> I <br />