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!! 0• <br /> 1.0 SUMMARY <br /> During September, 1987 Ccrrpro Companies, Inc. performed c=csion <br /> evaluat ons and hydrocarbon detection on one chaster of ten tanks in <br /> Stockton, California for Morton Paint Company. Field testing consisted of <br /> collecting site information, performing sail borings, and recoding corrosion <br /> measurements. Chemical tests were conducted in the laboratory on the soil <br /> samples collected from the borings. <br /> All data was then analyzed, including the use of a computer model to <br /> calculate the Mean Time to Corm Failure. A Priority Index was <br /> established for the tanks and recommendations presented for an Integrity <br /> Assurance Program. <br /> The test results indicate a low priority index for this cluster of tanks. Based <br /> upon the evaluation, recommendations are presented for ensuring the systems <br /> are presently tight and installing cathodic protection as part of a Tanis <br /> Integrity Assurance Program. <br /> 2.0 INTRODUCTION <br /> During September, 1987 Corrpro Companies, Inc. performed corrosion <br /> evaluations and hydrocarbon detection on underground tanks at one location, <br /> cotes of tan tanks for Marton Paint Company, Stockton, California. <br /> Soil boring tests, electrical field testing, and chemical soil sample analyses <br /> were performed to determine the mean time to corrosion failure (M T C F) and <br /> priority index (PI) at each location. Site information was recorded with <br /> resect to adjacent utilities, surrounding buildings and water supplies. The <br /> tanks were sticked to determine the depth and the roughness of the internal <br /> tank suxfaoe immediately below the fill pipe. Test hobs were , drilled <br /> approximately one foot from the side wall of the tanks to a depth of two <br /> feet below the deepest tank. At two foot inks, tank-to-soil potentials <br /> and sail resistivity measurements were recorded in place. Soil samples were <br /> collected at the mid-point and the bottom of the boring. These were then <br /> sent to the Corrpro sails laboratory for measurement of moisture convent, <br />