Document kDGD8k8aJ6nnqLbReL6k0gDD0

p HEST-PAINE /(^ |^JcJiotatotiea me.. 7790SIAVf. (ATOM wxmcu ram ASBESTOS FIBER COUNT ANALYSIS for V____ dl i E. I. DUPONT Post Office Box 3261 Beaumont, Texas 77704 May 18, 1983 PUP 0508265 83-896 ^ DU 004277 E. I. DuPont, Beaumont works, Beaumont, Texas for asbestos fiber count analysis. Due to excessive loading of airborne material on filter 52-1, conventional analysis was considered impractical. This filter was then examined via Polarized light Microscopy for asbestos identification and content analysis. P & C/M METHOD 239 Sample Fields Identification Observed Fibers Observed (>5 urn) Fibers per Filter Air Flow (liters/min.) Volume Fibers per c.c. of Air (>5 um) Blank 52-6 52-1 100 1 2850 20 154 2,194,500 a. * --mm ... 73 ... Asbestos Identification and content analysis via Polarized Light Microscopy. A portion of filter 52-1 was prepared for analysis following P & CAM Method 239. Analysis of the sample confirmed that in excess of 50* of the "DUST" collected on filter 52-1 was chrysotlle asbestos. The attached photographs were taken at 40X, 200X, and 400X magnifications. 1 I * unable to read due to excessive loading If** These analyses were included at the request of Dr. Berlin Cassidy, E.I. DuPont, if Beaumont Works. Jonny H. Vickers Chemist i:iz * V. dl 83-896 DUP 0508266 DU 004278 PPD LABORATORY AREA INCIDENT 4/6/83 At about 10:00 AH on Wednesday, April 6, 1983, it was discovered by our Laboratory Personnel that asbestos may be present in dust generated from flooring removal. The previous flooring was removed with electrical scrapers and the floor sanded to remove adhesive and flooring particles. The flooring project was begun on Friday, April 1, 1983, the sanding of the floor was begun on Monday, April 4, 1983. Present during Honday's removal and sanding was "C" shift (Everett on vacation), the day when most dust was generated. On Tuesday, April 5, 1983, the project ~ontlnued with some sanding being conducted. Sanding was continued on Wednesday morning, and our attention was gotten when the contractor doing the sanding stated that asbestos was present in the dust. He stated that this was his practice for 15 years and he wasn't affected. Berlin Cassidy confirmed the presenae of asbestos in the backing material of Armstrong Flooring from Armstrong Corporation. The sanding operation was shut down at 10:15 AM on Wednesday, April 6, 1983, until dust samples were analyzed at SRW. Berlin returned with "positive" results, and our Laboratory groups were contacted at 2:30 PM. The series of activities is highlighted: e The flooring was removed with the electrical scrapers on Friday, April 1, 1983. e The adhesive, and flooring partloles attached to the adhesive, was sanded on Monday, April 4, 1983. This was the day when most dust was generated and "C" shift was present. e Sanding was continued on Tuesday and Wednesday, with less generation of dust. e Sanding was stopped on Wednesday, April 6, 1983, at 10:00 AM. e A Laboratory meeting was held at 2:30 PM to advise our Personnel of findings and of actions to be taken to complete the project. L. T. Freeland explained the history of asbestos exposures and the EPA standards (supported by Du Pont standards). His report is attached. DUP 0508267 DU 004279 -2 - Laboratory actions included: Confirmed that asbestos fibers were present in dust samples, by SRW. e notified Bill Dougher of our incident and resulting concerns. The preliminary discussions should have considered this potential. e notified Huber's, the floor contractor, of our findings and concerns. e Discussed our concerns with the "sander" (Huber's) and a need to wear a Survivair mask when dust is generated. (He was very cooperative although he had not worn one in the many years of experience.) e The PE sheeting used to protect instruments was removed and wet-sponging of benches and work areas conducted. e Berlin Cassidy book samples of ceiling dust and wall dust to evaluate for presence of fibers. e Ray Taylor, Contractor Coordinator, witnessed the sanding with the use of a sweeping compound. The approval was given to continue the operation as long as adequate compound is used. The areas were roped off as sanding was conducted with respirator use. e Laboratory Personnel were restricted from "sanding" areas, until no trace of airborne dust existed. e Personnel monitoring of two Laboratorians was conducted for the 7-hour period on Thursday, 4/7/83. e A copy of this area incident will be filed in affected Laboratorian's file. e Details of Berlin Cassldy.'s findings will be attached to this Incident report. EL:ob 15.34 OUP 0508268 DU 004280 ASBESTOS IDENTIFICATION PPD LAB - REMOVAL OF OLD "ARMSTRONG" FLOORING 4/6/83 9:30 AM 9:35 AM 9:40 AM 10:15 AM 4/12/83 Huber's employee said that dust generated by their floor sander (while removing the remaining adhesive and tile backing) oontained asbestos. Confirmed asbestos present in backing - Joan Greiner - Armstrong Consumer Line. Reported to Gene Landry and Lee Freeland (Gary Benedict was out of office). Gene stopped sanding operations immediately. Asbestos identification at Sabine River Works by Dr. J. E. Adkins and Judy Cooper was conduoted. A) Particulate matter from floor - isle D-3 South B) Ashed matter from floor - isle D-3 South Analyzed qualitatively by phase contrast microscopy under crossed prisms (polarized light). Both samples contained small quantities of asbestos fibers. Most fibers were partially coated with glue. C) Ashed backing off Armstrong Studio Solarlan (new). Only a trace of asbestos found (100 X on Microscope) 4/7/83 asbestos I.D. at SRW again. D) Airborne dust settled on previously cleaned top of Astro Model 1850 Analyzer in C-3 isle - north, while Huber's employee was sanding using "floor-sweep". Reported to Gary Benedict immediately and he stopped this practice. E) Analyzed qualitatively same as 4/6/83 by Judy Cooper and myself. This sample contained obviously more asbestos (easily discovered fibers throughout the sample) than the particulate matter from the floor on 4/6/83 (100X A 400X on microscope). F) Ashed sample did not contain asbestos fibers. No fibers of any kind observed in ash 100X nor at 400X. r BC :ob 15.49 DUP 0508269 DU 004281