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5. IF PRODUCT LOSSES "M VERIFIED, PRODUCT LINES AND/OR TANKS MAY REQUIRE <br /> TESTING TO DETERMINE THE LEAK SOURCE. <br /> A. PRODUCT LINES MAY BE TESTED USING AIR PRESSURE (APPROXIMATELY 50 PSI) <br /> OR A SHELL APPROVED LINE TESTING SYSTEM (E.G. , KENT-MOORE) . SHOULD THE <br /> LINE TESTS INDICATE LEAKING LINES, THEY SHALL BE REPAIRED OR REPLACED <br /> AND RETESTED TO ASSURE THE LEAK HAS BEEN STOPPED. IN ADDITION, A <br /> INTAINED FOR A PERIOD OF 7 DAYS <br /> PRODUCT LOG INVENTORY CHECK SHOULD BE MA <br /> ARE NO OTHER LEAKS IN THE <br /> AFTER THE LINE REPAIRS TO ASSURE THERE <br /> SYSTEM. <br /> B. SHOULD THE TEST INDICATE THE LINES ARE NOT LEAKING OR IF A SHORTAGE <br /> CONTINUESFA TER THE LINES HAVE BEEN REPAIRED, THE UNDERGROUND TANK(S) <br /> SHALL BE TESTED BY A PRECISION OR OTHER APPROVED PROCEDURE. (SEE <br /> N. F.P.A. 329) . <br /> NOTE: LOCAL FIRE CODES AND ORDINANCES MAY DICTATE THE APPROPRIATE TESTING <br /> PROCEDURES FOR USE ON UNDERGROUND TANKS. AIR TESTS OF UNDERGROUND <br /> TANKS ARE NOT RECOGNIZED AS CONCLUSIVE, ARE DEEMED UNSAFE BY MANY FIRE <br /> PREVENTION AGENCIES, AND SHOULD NOT BE USED. IF THE TANK TEST <br /> INDICATES ONE OR MORE TANK LEAKS, REPAIR OR REPLACEMENT WILL BE <br /> COMPLETED. <br /> CORRECTIVE ACTION <br /> 1. THE SHELL ENGINEERING STAFF SHALL TAKE IMMEDIATE ACTION TO STOP, <br /> CONTAIN, AND SHALL TAKE IMMEDIATE DECISIVE ACTION TO RELIEVE THE THREAT <br /> OF PUBLIC HEALTH AND SAFETY HAZARDS, OR PROPERTY DAMAGE. <br /> 2. IT MAY BE APPROPRIATE TO OBTAIN SAMPLES OF THE RELEASED PRODUCT FOR <br /> TESTING AND IDENTIFICATION BY SHELL LABORATORY. <br /> 3 . OBSERVATION WELLS WILL ONLY BE INSTALLED WITH HEAD OFFICE, MARKETING <br /> ENGINEERING, ENVIRONMENTAL GUIDANCE. IF LOCAL AUTHORITIES AND/OR <br /> CONDITIONS' DEMAND IMMEDIATE INSTALLATION, THEN INSTALL THE TEST WELLS <br /> IN ACCORDANCE WITH STANDARDS SHOWN FOR MINIMUM FOUR INCH PVC PIPE WITH <br /> INSTALLATION. <br /> IF FORCED, BY SITUATION, TO INSTALL OBSERVATION WELLS OFF SITE ON <br /> PUBLIC PROPERTY, ACQUIRE LOCAL AUTHORITY APPROVAL OR WRITTEN ORDER TO <br /> PERFORM THE WORK. <br /> 4 . OBSERVATION WELL INSTALLATION STANDARDS (SEE OBSERVATION WELL DETAIL <br /> ATTACHED) . <br /> A. INSTALL OBSERVATION WELLS IN LOCATIONS SPECIFIED AND/OR APPROVED BY <br /> HEAD OFFICE, MARKETING ENGINEERING, ENVIRONMENTAL. <br /> B. DRILL (AUGER) A MINIMUM 12-INCH DIAMETER HOLE TO A DEPTH OF AT LEAST <br /> 5 FEET BELOW THE MINIMUM WATER TABLE. <br /> C. INTO THE HOLE, INSTALL 4-INCH OR 6-INCH DIAMETER SCHEDULE 40 SLOTTED <br /> AND BLANK PVC PIPE, WITH PIPE SIZE DEPENDENT UPON THE SITE'S GEOLOGY <br /> AND LOCAL REGULATIONS. SLOTTED PIPE SHALL HAVE FACTORY CUT TWENTY <br /> THOUSANDTHS ( . 020) INCH SLOTS. <br /> Page 9 <br />