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1 <br /> The product piping for the fueling facility consisted of sm& wall steel and was intact upon <br /> removal of the underground storage tanks The fueling system was composed of product <br /> dispensers which were single hose suction type This type of dispenser is equipped with a foot <br /> valve wrtivn the suction line to the tank that keeps the product lune full such that the dispenser <br />' does not lose prune At the time of the removal the product lines were full indicating that no holes <br /> were present it the product lines The suction type system does not operate under pressure hle a <br /> turbine type system therefore eliminating the possibility that the contamination found was from <br />' qty Piping <br /> tSample Collection and Testing <br /> At the time of the removal it was evident that sod and water samples were required to determine <br />' if petroleum contaminants were present at this location The soil and water sample locations were <br /> collected under the direction of Michael Kith, San Joaquin County Environmental Health <br />' Specialist The water samples were collected fast from the tank pit utilizing a glass container at <br /> the end of a telescoping rod The water samples were collected and immediately placed in the <br /> appropriate sample containers by Brian Pabst of FGL, Inc There were a total of(2)two water <br /> samples collected(figure 5) from the tank excavation The first sample collected was designated <br /> 4,000 gallon tank pit water and the second sample was designated 10,000 gallon tank pit water <br /> The(2) water samples were each analyzed for the following: EPA Method 8015 Total Petroleum <br />' Hydrocarbons Gasoline and Diesel, EPA Method 8020 BTEX and MTBE, EPA Method 239 2 <br /> Lead Table 2 shows a summary of the chemical analysts results for the tank pit water samples <br /> After the collection of water samples, soil samples were collected from the bucket of the <br />' excavator from various location of the sidewalls within the tank excavation Sample 3 was <br /> collected from the south wall of the excavation where the 10,000 gallon diesel had been <br /> located(figure 5) Sample 4 was collected from the southeast wall to the vicuuty of the 10, 000 <br /> gallon diesel tank Sample 5 was collected from the west wall it the vicinity of the 10,000 gallon i <br /> diesel tank Sample 6 was collected on the west wall to the vicinity of the 4,000 gallon gasoline <br />' tank Sample 7 was collected from the north wA in the vicinity of the 4,000 gallon gasoline tank- <br /> Sample <br /> ankSample 8 was collected from the northeast comer m the vicinity of the 4,000 gallon gasoline tank <br />' Sample 9, 10, and 11 were collected from the stockpiled soil (figure 5) Samples 9, 10 and 11 <br /> were composited in the lab by technicians using the appropriate procedures <br /> The soil samples were collected to a 2 inch by 6 inch brass cylinders from native soil excavated <br />' with the excavator bucket The cylinders were then covered on each end with Teflon and plastic ' <br /> i <br /> end caps and then sealed and labeled with the sample number, time collected, and chemical <br />' constituents to be analyzed for The cylinders were then placed in a pre-cooled (4 degrees <br /> Celsius) ice chest containing blue ice The samples were retained to the pre-cooled ice chest until <br /> delivery to FGL,Inc , it accordance with EPA protocol <br /> 1 <br /> 1 Z <br /> 1 <br />