Document Xz6aRpJak69m0KaBR8wNaNxzK

J, D. Fannin I SUBJECT Zakriski Use of Gasbadge' PIELO POINT On OePT. & OLOO. NO. LouIsvllle PIELO POINT OR OEPT. & BLOC. NO. Brecksville R & 0 Center, cJS-MWDfiTG YOUB LETTER D/8506 OATE THIS LETTER Au9- 3, 1977 I have reviewed the test data available which describes the performance of the Gasbadge. lUhile it is true that BFG has the only data relative to vinyl chloride, that data is very 'strong. It is my recommendation that you purchase the Gasbadges and collection elements to permit daily monitoring of the workers returning from the pallet factory. It is not necessary to continuously conduct simultaneous samplings with the pump and tube. However, twenty-five to thirty such comparisons will be valuable. As we discussed on the phone, you could include a pump and tube sampling once or twice a week. That would provide a random spot test situation throughout the first few months of the nine month program. Mike Paschal has prepared a brief description of the very few analysis "tricks" that will be of help to you. I am including this note and if you have any questions please call. Once your analyses are complete and you are calculating the vinyl chloride exposure,* it ill be necessary to use the diffusion coefficient for vinyl chloride. We use the following value, 0.107 cm2/sec which was measured at Brecksville by A. R. Berens. Please keep me informed on the results and progress of this program. :c: Katzenmeyer, Jr. K1 upar Whitney Taylor-S. S. Michels Paschal-0. S. Kurtz FH es Paul M. ^akriski 1-000 69 ANALYSIS PROCEDURE FOR GASBAOGES The gasbadge elements are placed in their vials immediately following exposure. These vials should have the threads wrapped with teflon tape and their caps sealed with electrical tape. They should be kept chilled until the time of analysis. Two ml of carbon disulfide (CS2) should be added to the vials by syringe. These should then be desorbed for one half hour (the vials should be shaken during this time). If an automatic sampler is to be used, l ml of the solution should be transferred by syringe to an auto sample vial. The samples are then analyzed by gas chromatography equipped with PlD detector*. The operating conditions are as fo 11 ows: Column: Injection port temp.: Oven temp*: Detector temp.: Carrier flow: Elution time: Vinyl Chloride Benzene 3*x3/i6H Porapak QS 10'xt/8n \0% SP-1000 on chromasorb WAW 100/120 200C 250C 80C 160C 120C isothermal 2 min. 2 min. 250C 300C 30 cc/min 30 cc/min - determined from standards 1-000 70 /lotcr-organizat '^5^^oodricli; VCI Cross Check P. M. Zakriski t UBJECT Distrib^rjt ionpieLO point on oePT. cl aura. no. FIELD POINT OP OEPT. & BLOO. NO. Brecksville R 0 Center, D/8506 OATB TH'B t_GTTER Dec. 12, 1977 BFG Vinyl Chloride Cross Check Program - A Direct Link to NIOSH Cross Check Program Each plant laboratory that deals with vinyl chloride participates In a cross check program run by the Environmental Laboratory, The. performance of the plant laboratories as judged from the results of .this program is excellent. At this time, we can relate this performance to the industry as a whole through a similar program conducted by NIOSH that the Environmental Lab participates in. The Environmental Lab performs very well in the NIOSH vinyl chloride cross check program. Therefore, since the Environmental Lab also participates in the BFG program the plant labs can be referenced to the'NIOSH program. The NIOSH vinyl chloride program has distributed two sets of standards in 1977- Each set consisted of carbon tubes to be analyzed by the CS2 wash procedure. The results of the analyses of the Environmental Laboratory show that this laboratory is always within k% of the theoretical loading. This performance is quite good but not unique to the Environmental Lab. In the last BFG VCI cross check round, the plant laboratories and the Environmental Lab were within -8fc of theoretical. Therefore, we may conclude hat the plant laboratories would all be within the VCI regulation (25%) if they participated in the NIOSH program. fjj/ Paul M. Zakriski jb cc: 0. S. Kurtz J. F. Stuesse R & D Files 6. L ^ 2 1977 iJSW 1 ifu IIIHO USA r 1-000 71