Document 1gzn3NRgXw5rJqjpy4BJQ87dE
December 28, 1992
Dow U.S.A.
The Dow Chemical Compary P 0 Box 150
Plaauemine Louisiana 70765-0150
Daniel Cortez Petrin Building 4106
cc: Dan Jones Glycol I
Building 1501
Asbestos Monitoring
Enclosed are sample results for potential exposure to asbestos.
The OSHA 8-hour permissible exposure limit for asbestos is 0.2 f/cc >5 microns and the 30-minute short term exposure limit is 1 f/cc >5 microns.
The results displayed are based on sampling duration.
The data sheet shows the results of exposure using two methods, the Limit of Detection (LOD) and the Limit of Quantitation (LOQ). Included on the data sheet is an explanation of the method Limit of Quantitation.
Thank you.
Darlene S. Creel Industrial Hygiene Ext. 6181 Building 3502-W
Attachment
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LOUISIANA DIVISION INDUSTRIAL HYGIENE SAMPLE RECORD
PLANT/DEPT. MONITORING FOR
___________ ___________
DATE f2Z-/& - 9 ^ OTHER CHEMICALS PRESENT: _
SAMPLE No 158H
TEMP.
>~ DEGREE F
SAMPLE COLLECTION MEDIA:
BADGE NO._________
HUMIDITY /00^ TYPE
PUMP SERIAL NO.
*3 f
CALIBRATION DEVICE: HTtfUBBLEMETER
OOTHER________
O ROTAMETER
CHARCOAL TUBE SIZE________________ ''FILTER CASSETTE SIZE 3 0^1
SILICA TUBE
SIZE__________________
DRAGERTUBE TYPE_________________
PUMP FLOW RATE CALIBRATION:
BEGIN: \ JfZL~3
1.212.21
zrz 7
OTHER_________________________________
SHIFT: OlOHR.
12 HR.
O^HR.
''PERSONNEL SAMPLE AREA SAMPLE
FULL SHIFT TWA
______ WIND
STEl/TASK
DIRECTION
BEGINNING FLOW RATE AVG-.7aJt 3.6 ENDING:!. 2( 2 </ I'ZMM-
'''CC/MIN L/MIN - ^/2X
3.2uS.
ENDING FLOW RATE AVG. 0 ! 3. (n _ O'fcC/MIN L/MIN
EMPLOYEE NAME_ EMPLOYEE I D #_____ JOB CLASSIFICATION. IH JOB CODE #______ CONTRACTOR COMPANY
RnEt^SrPiKIRAATtuOKR UuS>EtDu?f Oc#Y~Ert:S> lj NrvOu
RESPIRATOR MODEL / CANISTER TYPE TlervCC 7700
MOUTH-BIT
DUST
Q0HALF-FACE /
7
SAMPLE AVERAGE FLOW RATE
2Z/3. &
TIME STARTED. 7:33.
TIME STOPPED. TOT. RUNNING TIME(MIN) 7J2
/ TRAMPLE VOLUME (AVG FLOW X RUN'
FULL-FACE
AIRLINE O SCBA
DESCRIPTION OF AREA SAMPLED/JOB PERFORMED DURING MONITORING
M 7
ANALYTICAL REPORT REFERENCE # ANALYTICAL RESULTS: U)^
RESTRICTED FOR USE WITHIN DOW ONLY1
VP-124
FORM FILLED IN BY.
-) i 4 (0 ^
00 C.ONF" DFNT t
ASBESTOS MONITORING DATA RESULTS: GLYCOL 11892
"LOD ***LOQ
EXPOSURE GUIDELINES 8-HR. TWA LIMIT-0.20 FIB/CC 30-MINUTE LIMIT = 1.0 FIB/CC LIMIT OF DETECTION = 7 FIB/MM2 LIMIT OF QUANTITATION = 100 FIB/MM2
DATE SAMPLE PERSONNEL DESCRIPTION
12/16/92
15811
*436-74-3503 Insulator: Removing Asbestos insulation from 1.5* pipe WET METHOD USED
DUR(MIN) VQL(L) 32 68
LOD FIB/CC
<0.01
***LOQ FIB/CC
<0.57
* The proper protective dothing was worn during the job. North 7700 Respirator with HEPA filters were worn during the job.
Note: The Limit of Quantitation has been defined as 100 Fibers/MM2 using the minimum fiber loading criteria specified. In the NIOSH analytical method 7400, the stated range of the method is 100 to 1300 Fibers/MM2 filter area. Although samples below this range can be analyzed, the method has not been validated below 100 Fibers/MM2. However, the NIOSH method 7400 also establishes the estimated Limit of Detection as 7 Fibers/MM2 (Reference OSHA Std. 1910.1001, Appendix B). Based on this information, we will establish 100 Fibers/MM2 filter area as our Limit of Quantitation and 7 Fibers/MM2 filter area as our Limit of Detection (which is more representative of the actual fibers present) for asbestos monitoring. We will report both Limit of Quantitation and Limit of Detection.
If only limit of Quantitation were expressed, the minimum reportable result would calculate to be 0.04 Fibers per cc for an 8-hr. Time weighted average sample at a flow rate of 2 liters per minute and 0.6 fibers per cc for a 30 minute time weighted average short term sample at a flow rate of 2 liters per minute.
DO A 114075 CONFIDENTIAL