Document KG7BxgLvdQ8OwQBzXL0Ykzw86

DOW CHEMICAL U.S.A. 50983 _________________ teMas division FREEPORT, TEXAS 775A1 CONFIDENTIAL--------- FOR THE USE OF DOW EMPLOYEES ONLY ENVIRONMENTAL HEALTH REPORT ASBESTOS H0NIT0RIN8 0URIN8 DEMOLITION OF THE HOSPITAL PENTHOUSE MAJOR UNIT DEMOLITION, APB 01-2954 FILE NO____________________________ September 4, 1986 DATE_______________________________ L. F. Bullard AUTHOR ______________ CHECKED DATE _ 'Scj&b . / 5^ Summary Asbestos nonitoring was done during the stripping of asbestos from piping and vessels in the penthouse of the foraer Coaaunity Hospital prior to deaolition of the penthouse. The nonitoring was done to assure that the use of approved job procedures was effective in controlling airborne concentrations of asbestos. The area and personnel saaoles were within acceotable Units at 0.04 fibers/cc and 0.19 fibers/cc respectively. The 0.19 fibers/cc represents a potential exposure since oersannel wore ail -eouired orotective equipment during the asbestos removal. CO --I o o The results of the report should be furnished to Industrial Soecialists, Inc., the contractor for the job. A Contractor Appendix is attached for cn distribution to the contractor. o cn co Distribution H> G> flhHch) OCD J. T. Barton, APB C. K. Browdy, P-101 D. E. Craaar, B-101 6. G. Hinojos a, B -- 108 A * i3. Hal ins, E-540 * Cover Sheet Qnlv ------------ err ngip-y, 1305'mirrang------ A. W. Schaffer, 2030 Midland M. G. Swank, 1803 Midland * F. D. Axe, Pittsburg t W. A. Turner, PIaquemine * G. L. Meier. Strongsville 4 J. E. LeBeau. 1303 Midland t S. M. 3orgaez , 474 Midland AN OPERATING UNIT OF THE DOW CHEMICAL. COMPANY ST00I5064 1HS rile 81-2954 INTRODUCTION - = aoe 2 Asbestos monitoring was done daring the strioaing at asbestos from :;ping and vessels in the penthouse of the former Coeaunity Hospital prior to demolition of the penthouse. The monitoring was done to assure that the use of standard job procedures were effective in controlling airborne concentrations of asbestos. METHODOLOBY 411 samples of asbestos were collected using calibrated Gilian NFS 113A air saepiing pumas to oull a xnown volume of air through 25 me cellulose ester membrane filters, 0.3 urn pore size. Samples were collected at a flow rate of approximately one liter aer minute. The ilters were prepared ana counted by McKee Environmental Health Services using phase contrast microscooy. 'he methoa useo is NICSH Method 7400. EVALUATION CRITERIA The evaluation of exposure levels was based on the following criteria: Asbestos OSHA PEL 2 fibers/cc* * Beginning in January, 1987, the OSHA PEL will be 0.2 fibers/cc The OSHA PEL (Permissible Exposure Limit) is the time-weighted average concentration for a normal 3-hour work day, 40-hour work week, to which nearly all workers may be repeatedly exposed without adverse health effects. RESULTS AND CONCLUSIONS Taole 1 snows the monitoring results. The aircorne concentrations were within the acceptable limits. The potential exposure to personnel was 0.1? fibers/cc. All personnel wore the protective ecuipment required bv the 'Texas Operations Asbestos Handbook". The worxer removed asbestos from piping in the confines of the penthouse and cleaned uo the area at the end of the snitt. 'he area eamoie was taken in the center of the worx area. RECOMMENDATIONS Approved guidelines for asbestos handling ana removal were followed an the day of monitoring and showed acceptable levels of asbestos. These guidelines must be followed at all times. The contractor with employees associated with the job must be furnished with the resalts of this report, required to inform his etoiovees ana : n writing, that the informing nas been completed. A Contractor Appencix is attached. T IHS rile cl 4 Saeple Nuatoer B105--515-- 2 B105--515--I TABLE I SUMMARY OF ASBESTOS HONITORINB S-103 HOSPITAL DEMOLITION Type of Stiolt Date Staple Tiaa(Nin) SSI3O3-0O-7O46 5-15-S6 *65 Area-on conpressor in the center of the roo* 5-15-86 470 Concentration fibtre/cc 0.1? 0.04 ST00I5065 Ir 9/11/86