Determination of Conradson Carbon Residue (Micro Method) 1Weigh each vial to be used for sample analysis and record the mass to the nearest 0.1 mg. 2Warm sample(s) if needed to enable pouring and thoroughly mix prior to testing. NOTE: Handle sample vials with forceps at all times to minimize weighing errors. 3Transfer 0.15 ±0.05 g (2 or 3 drops) of the sample into the vial and allow to cool. 4Reweigh and record vial + sample weight to nearest 0.1 mg. 5Place sample vials into vial holder noting position of each sample with respect to the index mark on holder. 6Place vial holder in oven chamber of MCR tester. 7 Press the Red Power Button. It will light up. 8Turn the Nitrogen valve on, adjusting co that the gauge on the MCR tester reads about 20 psi. 9 Press the PROG/LOCAL/RESET button. Wait for the Run Light to go off (about 5 to 10 seconds). 10 Press the PROG/LOCAL/RESET button again. Wait for the HOLD and REM lights to come on. 11 Press in the PROG STATUS/SHIFT button and the DISPLAY/RUN button at the same time. The Run Light should come on, and the REM light should remain on. 12 Press and hold the NITROGEN ON button until you hear a click. The Run light should remain on, and lights for EVENTS 3 & 4 should come on. 13 The heating and cooling program is automatic and takes about 1 ½ hours. The program is finished when the EVENT 4 light flashes continually. PPE Use Standard (SSP-0011) Y Full Face Shield / Goggles Hood Clothing—Chemical Protection Gloves—Chemical Personal Fall Protection Respirator / Filter Mask Supplied Air Job Hazards Y es Job Hazards Y es Access and EgressMoving Parts Activities of OthersNoise Adverse WeatherRail Movement Chemical ExposureSharp Edges ElectricitySlips, Trips, and Falls FatigueStatic Electricity Fire and ExplosionTrip Injuries Ground ContaminationTrapped Pressure Manual HandlingWorking at Height Other: References / Documents  N/A AreaUnitOperating Procedure #Certified byRevision #DatePage 3LabOPS-LB-NM-03018/25/111 of 2 Determination of Conradson Carbon Residue (Micro Method) Environmental  N/A Quality Assurance  N/A Special Instructions  Any problems, notify Shift Supervisor or Duane Chaisson. W A R N I N G C A U T I O N  Procedure Completed Date: Prepared By: Approved By:

AreaUnitOperating Procedure #Certified byRevision #DatePage 3LabOPS-LB-NM-03018/25/112 of 2 Determination of Conradson Carbon Residue (Micro Method) (continued) 14 Take the lid off the oven chamber and lift the vial holder out with a pair of tongs. Place vial holder on the grill to the right of the oven until cool (about 10 minutes). 15Reweigh the sample vials to nearest 0.1 mg and record weight. 16 Calculate result as follows: 16.1 Subtract weight of empty sample vial from weight of sample plus vial to obtain weight of sample Subtract weight of empty vial from weight of residue plus vial to obtain weight of residue Calculate percent carbon residue: % carbon residue = (weight of residue / weight of sample) X Report the mass % carbon residue to the nearest 0.1 % in Labworks.  Procedure Completed Date: Prepared By: Approved By: