Document zzxoB4mRY8KXqK141996omzq0

DOW CHEMICAL U.S.A. April 12, 1984 LOUISIANA DIVISION P O BOX 150 PLACtUEMINe, LOUISIANA 7O7&A~0T6O SOA 389-8000 Hugo Andricain - Major Manager P. J. Prejean - Railroad Ellis George - Tank Car Cleaning Charlie Halphen- Industrial Hygiene Dannie Kennedy - Industrial Hygiene Elayne Hyatt - Safety To keep our Beckman 6750 Analyzer at Tank Car Cleaning operating at peak efficiency, with a minimum of maintenance costs, the following is recommended and can be done by our personnel: 1. Inspection of analyzer filters, vacuum pump, sample lines and gas bottles using a daily check list (attached). 2. Re-align and secure all field sample points under Tank Car shed. 3. Number field sample points for easy location. 4. Install filters at all field sample points to minimize problems with water, steam, etc. clogging sample lines. These filters are on hand. The daily inspection check list and location of sample points are attached. Additionally, regular calibration of the analyzer by the Instrument Dept, is necessary, probably on a weekly basis. do not have the expertise to do this. We I am available to instruct personnel or assist asnieeded. J. L. Moreau, Jr. Industrial Hygiene RaiIroad/Marine DO A 108615 CONFIDENTIAL DAILY AREA ANALYZER CHECKLIST DATE NAME 1. INLET AIR FILTER CHECKS (Open bleed valve to blow out water vapor.) COMMENTS Filter #1 __ __________ Filter #Z ____________ ____________________________________ ____________________________________ Filter #3 _____________ ____________________________________ Filter #4 _____________ ____________________________________ 2. VACUUM PUMP OPERATION/FILTERS (Oil vapor Filter #5 No bleed valve) Filter #6 COMMENTS 3. ROTOMETER OPERATION (Check ball position on all rotometers. If ball is seated, sample line is plugged with water. Refer to chart, locate corresponding field sample point and remove filter. Disconnect sample point tubing at outside of analyzer housing. Connect air line tubing to sample tubing. Open air needle valve and blow back for approximately 5 minutes. Check field sample point to insure that water has been blown out. Close needle valve on air sample line. Replace filter at field sample point. Disconnect air line tubing and store in analyzer housing. Reconnect sample tubing. Check for ball position on rotometer.) COMMENTS Rotometer, Sample Point #1 Rotometer, Sample Point #2 Rotometer, Sample Point #3 Rotometer, Sample Point #4 Rotometer, Sample Point #5 Rotometer, Sample Point #6 Rotometer, Sample Point #7 Rotometer, Sample Point #8 Rotometer, Sample Point #9 Rotometer, Sample Point #10 Revised: 3/25/85 LGS/lrj DO A 108616 CONFIDENTIAL DAILY AREA ANALYZER CHECKLIST PAGE 2 4. CARRIER GAS AND FUEL GAS BOTTLE PRESSURES (Change bottle if 4000# gauge reads less than 200#.) COMMENTS Zero Hydrogen - on stream____________ Zero Hydrogen - spare _________ _ Zero Nitrogen - on stream _______ __ Zero Nitrogen - spare __________ Zero Air Zero Air - on stream _________ - spare __________ ______ ______________ ; NOTE: Filter elements should be changed when excessively oily and wet. Revised: 3/25/85 LGS/lrj D0 A 108617 CONFIDENTIAL DAILY AREA ANALYZER CHECKLIST PAGE 2 4. CARRIER GAS AND FUEL GAS BOTTLE PRESSURES (Change bottle if 4000# gauge reads less than 200#,,) COMMENTS Zero Hydrogen - on stream_________ ___________________________ Zero Hydrogen - spare __________ Zero Helium Zero Helium - on stream - spare __________ _____________ __________ Zero Air Zero Air - on stream - spare __________ ___________________________ NOTE: Filter elements should be changed when excessively oily and wet. Revised: 10/29/34 LGS/lrj DO A 108618 CONFIDENTIAL