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D <br />PROFESSIONAL TANK SERVICES, LTD. 1912 Raymond Drive Northbrook, IL 60062 (312) 291-0113 <br />10 <br />...O._ lio.. <br />.......:...... <br />.............. <br />Tony Arado <br />Page 2 <br />Although the data conversion for tank system #2 mathematically is <br />within + or - .050 gal/hr. a careful trend analysis reveals <br />physical interference from one of the following: air vapor pocket <br />changes, increased soil pressure or product line bleed back. <br />The product lines were tested and found to be tight. <br />Prior to and after testing, the tank bottomes were checked for <br />water through the fill pipes, the result are as follows: <br />Tank system #1 0.00 Inches were recorded. <br />Tank system #2 0.00 Inches were recorded. <br />Tank system #3 0.00 Inches were recorded. <br />Si-aFere1y, <br />W i�a�" go <br />WJP/leb <br />Precision Tank Testing <br />Professional Tank Services, Ltd. • Safe • Secure • Systematic <br />