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<br />Roseviiie School District #623 <br />STS Project #94879-XF <br />October 11. 1989 <br />Page 3 <br /> <br />recorded for each of the samples examined. This task was performed by sampling the <br />air space immediately above the soit sample contained within a covered clean glass <br />jar. <br /> <br />Each soil sample was screened with the HNU meter. The values above background levels <br />were observed. Background levels were observed to be 0 to I ppm. Al1 samples had HNU <br />meter deflections less than 1 ppm. The values were recorded and listed as follows: <br /> <br />Boring B-1 <br /> <br />Test Depth <br />(feet) <br /> <br />HNU Readings <br />(ppm) <br /> <br />1.0 - 1.5 <br />2.5 - 3.5 <br />4.5 - 5.5 <br />6.0 - 7.2 <br /> <br />< I <br /><I <br /><I <br />< 1 <br /> <br />Boring B-2 <br /> <br />Test Depth <br />(feet) <br /> <br />HNU Readings <br />(ppm) <br /> <br />0.0 - 1.1 <br /> <br />< 1 <br /> <br />< = less than <br /> <br />Summary <br />. <br /> <br />STS Consultants. Ltd. has attempted to locate the tank at Lexington School. Two soil <br />borings were performed next to the tank. This letter outlines the general location of <br />the tank and the soil conditions above and adjacent to the tank. The HNU soil survey <br />for volatile organic vapor content indicated no readings above background levels for <br />any of the samples tested. <br /> <br />Statement of Qualification <br /> <br />The magnetometer, the instrument used to locate the underground storage tank. is only <br />an approximate indicator for the location of buried metal objects. The exact dimen- <br />sions and specific location of the tank is unknown and can only be interpreted from <br />the data presented in this letter. Our interpretation is based upon the data base <br />that was collected. Changes in our interpretation may occur as additional information <br />becomes available. In addition. variation in the soil conditions e,usts between <br />borings. This variation may change the interpretation of the soil conditions. <br />