Document 2NJg10R7Z6ZVbezKrjZ6qb92a

WTUSOP63 revised 3-26-92 EMPTYING A TAR BUGGY AT THE CLASSIFIER CHECK ACTION STEPS (all caps) COMMENTS (below steps) 1. CHECK LEVEL IN CLASSIFIER. Level must be less than 75% in order to put tar buggy material in the bay. 2. CONNECT GROUNDING CABLE TO TAR BUGGY FRAME, AND CHECK INTEGRITY OF CABLE. 3. REMOVE PLUG FROM 2" HAMMER UNION TAR BUGGY, CONNECT HOSE, AND CLOSE BLEEDS QN TRANSFER LINE AT REST END OF MAIN BAY. Use brass mall (hammer) on hammer union to avoid sparks. 4. ADD WATER TO VENT SEAL POT AND OPEN WATER TO VENT SCRUBBER. Also visually check the lip seal for water. If there isn't at least 6", it is possible to blow classifier material out of lip seal causing an environmental release. Add water to lip seal if necessary. Rotameter on vent scrubber max. flow is 2.8 gpm, set at 90%. 5. CONNECT 15 PSIG NITROGEN TO BUGGY. CHECK PRESSURE ON TAR BUGGY PRIOR TO OPENING NITROGEN BLOCK VALVES. Connecting 90 psia nitrogen is not al1 owed. This causes the pressure in the classifier to build up, forcing material to be blown out of the lip seal or dip legs. The result is a geyser that could splash the operator and cause an environmental spill. 6. CONNECT AIR TO VIBRATOR ON BUGGY AND TURN ON AIR TO VIBRATOR WHILE UNLOADING. The vibrator emits about 100 db so hearing protection is required for anyone standing within 30* of the buggy. CONFIDENTIAL: Subject to Protective Order SL 001193 of 14th Judicial District Court No. 91-1145 7. SLOWLY OPEN VALVE ON TAR BUGGY UNLOADING LINE. MAKE SURE 6" BLOCK VALVE IS ALSO FULLY OPENED. Since introducing organics into the classifier creates vapors, the 2" valve should be cracked open at first. If the scrubber stack appears to be properly venting (no vapor coming out of the seals), open the valve about 30%, then to 50% as the pressure in the buggy decreases. Do not open the valve all the way. Also, watch the level in the lip seal, since it tends to breathe during this step. Use half face respirator for this step. 8. WHEN PRESSURE GAUGE READS ZERO, SWEEP BUGGY WITH NITROGEN FROM 15 PSIG REGULATED DROP. Pressurize buggy to 15 psig, then block nitrogen and open valve slowly to classifier. Use half face respirator for this step. 9. WHEN TAR BUGGY IS EMPTY, BLOCK OFF NITROGEN AND AIR TO THE VIBRATOR. BLEED AIR AND NITROGEN DOWN PROPERLY AND DISCONNECT HOSES. Use half face respirator for this step. 4J 10 BLOCK 2" AND 6" VALVES AT THE BUGGY AND 6" u% VALVE AT CLASSIFIER, AND OPEN TOP BLEED AT CLASSIFIER. CoD O o O 4J Use half face respirator for this step. Q,J o M > -H j_V),- jj-) 11, DISCONNECT ALL HOSES AND GROUNDING CABLE LAST, h^ . W rr AND REPLACE 2" HAMMER UNION PLUG ON TAR BUGGY, g ^ Q Z to 6 J4 Roll up all hoses and grounding cable. Wash down the pad area using a minimum amount of tHtoo aU, ..r-oI a cr. . ^ O *H Q water. Use half face respirator for this step.> -*> t3 a 4J 12 RECHECK LEVEL IN CLASSIFIER AFTER EMPTYING. o CD .C Record in logbook the level before and after, and the time emptied. -O rr 3 w O 13 INFORM LEAD OPERATOR THAT BUGGY IS READY TO BE PICKED UP. Lead operator notifies maintenance (mule driver) or shift superintendent that tar buggy can be picked up for return to owner. Buggies should be mpti d as soon as possible so they ''an b empti d safely and not in a rush. SL 001194