Document qdoj87L1b22qgyR9gqgXQEL8R

1/7/76 Asbestos Sampling On December 22, 1975 the following asbestos samples were obtained from the vermiculite expander area. A Micronalr sampler was used with a sample rate of 2 LPM and 15 minute sampling time. Note: Only Libby vermiculite was being expanded. Sample. No. 10 12 Time Fibers Longer Than 5 Micrometers/ CC of Air_____ Location/Area. : Battefle E.H. Lab . Remarks 0910 to 0925 Following Operator, g.Q Basement, 5th Fir., 4th Fir., 1st Fir. 7.6 5 Expanders running - ft\, #3, #4, #6, & m 0930 to 0945 Following Operator, Shut-off #9 Hydro filter. Unplugged Cyclone on 4th Fir., to 6th Fir. to check all scrubbers. 4.5 5 Expanders running - #1, #3, #4, #6> & m 0955 to 1010 Following Operator, Checked #9 Cyclone, Went to Control Room, Started Fan, to top of Furnace - Could'nt find brush, to 1st Fir. to get brush, to 2nd Fir. adjust gates on P.P. Verm. Cortv. i .2 5 Expanders running - #1, #3, 4, #6, 4'#8 1015 to 1030 Follow Inq Operator, Brushed off top of Furnaces, took 9 min.. Checked Screens on Water Supply Line. 5.3 5 Expanders running - #I, #3, #4, #6, & #8 . Do this once per day. 0850 to 0910 Basement Area, Samp ling only area north of ManlIft. 1035 to 1050 1st Fir. Expander Area 0,3 ,5.2 5 Expanders was unloading car of Libby vermiculite .81 5 Expanders 1310 to 1325 3rd Fir. Expander Area .65 4 Expanders, #6 down at 11:30 SC DENH001710 Sample No. . Time Location/Area # Fibers ' Longer Than 5 Micrometers/ CC of Air Bette!Ie E.H. Lab . Remarks II ' 1330 to 1345 4th Fir. Expander Area 5.2 5 Expanders started #6 at 1330. 5 1355 to 1410 5th Fir. Expander Area 11.8 5 Expanders runn!ng. 9 1430 to 1445 6th Fir. Expander Area 5.0 4 Expanders shut #4 down at 1430. t 1500 to 1515 Sampler hanging . 2.2 4 Expanders approximately 4 ft. S' running, only above #2 Sand #3 Expander HopDer running Into Hopper. 1520 to (535 Following Operator, took B.D. and worked on dIugged Sand Hopper. 3-3 .57 4 Expanders running, The above samples were obtained by Dick Gruenbaum and all, samples were analyzed by Environmental Health Labs of Farmington, Michigan. In addi tion, two samples of raw ore and a sand sample were submitted for asbestos analyses. Sample labeled 1 was African, #2 is Sand from Libby Ore and #3 was Libby Ore. As an analytical check, samples#!, #2, #3 and #10 were also analyzed by Battelle. The following analyses were reported from Environmental Health Labs pn raw ore and sand samples. By optical analyses fibers were noted ir> all samples. " Using X-ray detraction the following were noted. #1 (African Orel #2 (Sand) #3 Libby 6% by weight None Less than \% fcr H , S1-'* SC DENH001711