Document bBnrNQO1jOwZdLLbamKyBezD6
(conoco)
Interoffice Communication
To Lab Analysts
From
P. L. Fetzer
Oate Subject
January 30, 1975 Analysis of Ambient Air Monitoring Samples
Beginning in February, the five-day week evening analyst shall have the responsibility for preparing the charcoal dosimeters for use in the monitoring and also analyzing the ambient air monitoring samples. I realize that it would be advantageous to make this analysis the responsibility of one irn so that the data obtained would be more consistent. To assign this responsi bility to one man is not possible and still maintain the work force needed in the laboratory.
A sample schedule is attached so that you may know when and how many samples will be in the laboratoiy. The analytical test for this analysis is attached and a copy will be found in tne Vent Gas Analysis Manual. This responsibility includes transferring the integrator counts for the integrated area of each component to the computor calculation sheet for further processing. For the present, you will not be required to complete the analytical summarization of the data. Mr. Hackett and myself will work with you so that this transition will be smooth.
All analysts have the responsibility of preparing the ambient air monitors when extras are needed and completing the Ambient Air Field Report section of the monitoring report for each man. In regards to this last report, please fill it out as completely as possible each time.
If you have any questions regarding this increase in analyst responsibilities, please ask.
be CC: JHM
VVC 000011540
DETERMINATION OF VCM IN AMBIENT AIR (CHARCOAL METHOD)
SCOPE: This method Is used to determine VCM at the ppm level In ambient air.
OUTLINE OF METHOD A known volume of ambient air is passed through a charcoal bed which ab
sorbs the VCM. The charcoal is then washed with carbon disulfide. A
chromatogram is obtained of the carbon disulfide solution and the VCM is calculated against a known standard.
APPARATUS 1. Bendix type C 115 air sampling pump. 2 Pittsburg Activated Carbon PCB 12430 mesh
3. 75 ML stainless steel sample bomb with H" pipe thread openings. 4. Two stainless steel V pipe thread to h" tubing valves. 5. 30 quart ice chest.
6. Dry ice. 7. Gas dispersion tube-kimax 12 EC with coarse frit. 8. Scotch brand 33+ vinyl plastic electrical tape.
9. Pyrex brand wool filtering fibre 10. Culture tube - 25 x 150 MM. 11. Tygon tubing - V ID x H" OD. 12. Perkin-Elmer 900 gas chromatograph with FID detector 13. Infotronics model CRS-100 integrator.
14. Honeywell 0,05 to 1.05 MV recorder. 15. Syringe - 5 micro liter Service "B" precision Sampling "Pressure-Lok" 16. Precision Scientific wet test meter.
17. 4 oz. glass bottles. 18. Bottle caps with plastic seals.
REAGENTS Carbon disulfide - spectroquality
Vinyl Chloride Monomer
COLUMN Diameter Length Liquid Phase Support
Column Temperature Injection Temperature Detector Temperature Carrier Sample size Detector
1/8" stainless steel tubing 20' 12% Diethylene Glycol Succinate Chromosorb P A/W 80/100 Mesh , . ^ Initial Temperature 60& C for 4 minutes
Program 60 C to 140 C at 4 per minute 150 C 175 C Helium 1 micro liter Flame Ionization
PROCEDURE FOR MAKING STANDARD The standard should contain about 1000 ppm VCM in carbon disulfide. Inject
a weighed amount on VCM and carbon disulfide in the stainless steel sample bomb. This standard must be refrigerated. Run a chromatogram on the standard once per day.
VVC 000011541
PAGE 2
CALCULATION A = weight percent VCM
A+B Where:
A = weight of the VCM B * weight of the carbon disulfide
PROCEDURE FOR SAMPLING
Assemble the pump as shown in Figure I. Place the pump on the person with the inlet tube positioned in the normal breathing zone area and turn on. After the sampling period, remove the pump and turn off switch. Pour the charcoal in a tared 4 oz. bottle and cap it tightly. Weigh the bottle and charcoal and record the weight. Place the sample in an ice chest containing dry ice for at least thirty minutes. Remove the sample from the ice chest and pour in about 60 ml of carbon disulfide previously chilled to dry ice temp erature, and mix thoroughly. Reweight the sample and record this weight. Return the sample to the ice chest for at least thirty minutes. Obtain a chromatrogram of the. standard and. the sample.
CALCULATION: Note 1
Integrator Count _of Sample__ x weight % VCM in standard = weight % of sample x
Integrator Count of Standard
weight 0^2 = & VCM
g VCM
= Moles of VCM
Mol. Weight
Flow Rate x Sample Time = Total Volume of air = Moles of Sample 22.4 Vtole
Moles of VCM
= Mole PIM of VCM
Moles of Sample
PUMP CALIBRATION
The Bendix Pump is calibrated to deliver 2.8 liters/minute using a wet test meter. This should be checked every three months.
NOTE 1. The weight of carbon disulfide, the pump rate, sampling time, area of components in sample, area and concentration of components in standard are entered in the time shared computor that calculates the time weight average value.
VVC 000011542
CONTINENTAL VCM PIANT
FLOW METER
FIGURE, I . AIR SAMPLING APPARATUS
VVC 000011543
DETERMINATION OF VCM IN AMBIENT AIR
SCOPE: This method describes a means of collecting and determining ppm vinyl
chloride in ambient air.
APPARATUS: Gas chromatograph, varian aerograph series 2700 equipped with flame ioni
zation detectors.
Auto-Lab System IV B chromatography data analyzer or suitable substitute.
Recorder Hewlett Packard Model 7123 A.
Glass collecting tube, 250 ML size with 5 MM I.D. side opening with rubber septum.
Bendix type C-115 air sampling pump.
2 ML pressure-lok glass syringe.
COLUMN: Diameter Length Support Liquid Phase
Column Temperature Injection Temperature Detector Temperature Carrier
3/16" Aluminum tubing 27' Chromosorb P A/W 60/80 Mesh Diethylene Glycol Succinate 12% W/W 900 c 140 C 180 C Helium
Sample Size
1.0 CC
STANDARD: 10 ppm VCM in nitrogen (Available from Big Three Industries, Houston, Tex.)
PROCEDURE FOR CATCHING SAMPLE: Place a rubber septum on side opening of glass collecting tube. Put about
10 inches of Tygon tubing on one end of the tube. Evacuate the glass cylinder by means of a vacuum system. Place the tygon tubing on the inlet of the Bendix Pump. Open both valves on the glass tube and turn on the Bendix drawing ambient air through the tube for about two minutes. Close the valves on the tube and turn off the pump.
PROCEDURE FOR ANALYSIS OF SAMPLE: Run a chromatogram of the standard gas. This should be obtained for each
series of samples and no less than every eight hours. Run a chromatogram of the sample using the glass pressure lok syringe.
PPM VCM equals : A X B C
WHERE: A - Peak area of sample B - ppm VCM in standard C - Peak area of standard
VVC 000011544
CONTINENTAL VCM PIANT FIELD AND LAB MTA SHEET REPORT
Employee Name __________________________________
. - Sampling Date
Occupation_________ _________________________________________
Supervisor__
Shift
1. Pump Serial No: .
____________________________
3. Employee Trained in Proper Use & Care of
Monitor . _ . _____
YES NO
5. Time Sampling Begin;
------------------------- ------
7. Routine Job; _____
_--
YES
NO
9. Was Respiratory Equipment Used; _____
..
YES NO
.1. Describe Work Performed During Testing Time;
2. Tube & Filter Operable ____ ___
YES NO
4* ' Personnel Monitor Installed &
Fitter Properly _____
"
YES
NO
6. Time Sampling Elided;
8. Special Job; ___
_
YES NO
10. Estimated Percent of Time
Respiratory Equipment Used __
FIELD REPORT
L2. Percent of Time Spent: Indoors ________________
Outdoors _
13. No. of Eluployees Involved in Job; _____________
14. Weather Conditions: Temperature F
Wind Speed
(Call 478-4610)
Direction Wind From ____________________
Humidity
Circle One:
Clear
Cloudy
Partly Cloudy
Rain
15. Report Filed By; Date
1. 3. 5. 7.
0
3
12.
13 14.
Date of Analysis ______ Sample Duration _.___________________________________
Weight of Empty Bottle __________________ __________ Weight of Bottle, Charcoal and Carbon Disulfide
Weight of Charcoal
________
an
Gas Chromatography Model; __________________________
2. Pump Calibration Date _______ 4. Air Sampling Ifete________________
6. Weight of Bottle with Charcoal
Quantity of Carbon Disulfide Used for Analysis;
grams
Analysis of Sample:
1. Vinyl Chloride 2. Ethyl Chloride 3. CC14
4. Trichloroethylene
5. CHCI3 6. Ethylene Dichloride
PPm oom ppm PPm ____ ppm ppm
Recovery Efficiency
7. 8. 9. 10. 11. 12. 13.
1,1,2 UNK #1 UNK #2 UNK # 3 UNK #4 UNK #5 UNK #6
percent
_ com ppm ppm ppm ppm ppm ppm
14. UNK #7 15. UNK #8
ppm
ppm
16. UNK #9
ppm
17. UNK #10 _____ ppm
18. UNK #11
ppm
19. UNK #12
ppm
TOTAL
ppm
Date Recovery Efficiency Test Conducted
- --*----- .---------
Report Filed By____________________ _____ ___ ___________
vvc 000011545
ATTACHMENT A CONTINENTAL VCM PLANT
OCCUPATIONS MAINTENANCE
Foreman Leadrr.en Boilermaker Millwright Insulator Electrician Instrument Man Carpenter Pipefitter Mechanical Helper Tool Room Repairman
P L ANT
P E RSONH E L MONITORING
SCHEDULE
FULL WEEKS OF
EACH MONTH
12
3
M X W TH F M ' X W .TH F M , T w TH F
L.
M X w TH
p D
D
P D
D
P
D
-D--
D P
OPERATIONS
Shift Foreman
p
E
Chief Operator E N
* Roardman
DN
Operator Block I
D
E
Operator Block II
N
D
Pumper Loader Offsites
DN
Pumper Loader Rack
E
D
D E
N
E N
N E
LABORATORY Analvstt. Wet Chemical Analyst G.C. Special Analyst
E N
D
N DE
D
WAREHOUSE STAFF
D
OFFICE STAFF
P
TECHNICAL STAFF
D
janitors______________________
D
F