Document vBM5r0q0wkmkoxDQVYNgnXx36

John A. Jurgihl & Associates, Inc. July 30, 1985 2o2coMcoi/*3e oflive sr. louis. uissouni ni44 <3 1 367*7466 Mr. Bob Suter Insulating & Materials Corp. 1042 Central Industrial St. Louis, Missouri 63110 Re: Results of area air samples during asbestos removal on pipe rack in CCU. .Dear Bob: To determine if asbestos fibers were being released outside the controlled area during the removal of asbestos insulation, from the pipe rack in the CCU, air samples were collected around the perimeter of the removal area. These samples were collected on July 24, 1985. Results of laboratory analysis indicate airborne fibers levels at the boundaries of the removal area were essentially negative or at normal background levels for this unit. Based on these findings, it would appear that the areas adjacent to the demolition site are free from health hazards associated with this operation. Sampling results are contained in- the attached table. Should you have any questions regarding our report please feel free to cal 1. Nimmo Certified Industrial Hygienist cc: V. J. Grizzle (Shell Oil Company) Chuck Spann (Strange & Coleman) DNN/kn LAM 019565 ABS-000376 RESULTS OF AREA AIR SAHFLES AT CCU INSULATION REMOVAL FROM PIPE RACK July 24, 1985 SAMPLE NO. TIME ON - OFF CCU-1 1110-1424 CCU-2 1111-1422 CCU-3 1109-1422 - LOCATION At entrance to CCU control room downwind At southeast corner of removal area downwind West edge of pipe rack upwind for removal FI5EP.S PER CUBIC CENTIMETER N.D.2 N.D. <D.L.3 All samples were collected with MSA model G pumps that were calibrated to a flow rate of two liters per minute. The collection media was 25mm, 0.8 micron MCE filters. 2 When 100 randomly selected microscopic fields are negative for fibrous materials the sample is reported as None Detected. 3 Detection limit for phase contrasb^microscopy for the volume * collected is 0.03 f/cc. LAM 019566 ABS-000377