Document JNgEDMXNep5EkrJJvk80m4qEO

FILE copy TECHNICAL REPORT for Garlock, Inc. Analysis of Eleven Gaskets from The United States Navy Ship "Gypsie* 31 July 1985 HcCrone Proposal No. ME-1537 McCrone Environmental Services, Inc. Norcross, Georgia a subsidiary of Halter C. HcCrone Associates, Inc Chicago, Illinois 31 July 1985 ,, Colt Industries 430 Park Avenue New York, New York 10022 ' Attention: Hr. Bernard Reuben SUBJECT: Technical Report for Garlock, Inc. Analysis of Eleven Gaskets from the USN Gypsie by Transmissiom Electron Microscopy for Chrysotile Homogeneity Re: McCrone Project No. ME-1537 Dear Hr. Ruben: McCrone Environmental Services, Inc. has completed the subject sample analyses as authorized by you. Attached is our report detailing the methods used, work performed and results of samples analyzed. .. We hope you have found our services helpful and our report informative. If you have any questions concerning this report or if we may be of further assistance, please do not hesitate to contact our office. MRB/RLH/jir cc: 1) Colt Industries New York NY 1) Mr. Bernard Reuben Colt Industries New York NY Sincerely, Martin R. Bennett Field Project Representative Richard L. Hatfield Director of Services Technical Report for Garlock, Inc. Analysis of Eleven Gaskets from the DSN Gypsie by Transmission Electron Microscopy for Chrysotile Homogeneity -- Eleven gaskets produced by Garlock, Inc. were presented for analyses by Transmission Electron Microscopy (TEM) for chrysotile homogeneity and the presence of possible amphibole asbestos. These eleven gaskets were taken from steam and water line flanges off the United States Navy ship (USN) Gypsie. Their sizes range from 6 to 16 inches in diameter. 2111 of the gaskets are approximately 41 years old. METHOD (Transmission Electron Microscopy) From each sample submitted, thin strips. were cut from the gaskets, then split apart and separated using tweezers. Chrysotile bundles were then isolated, pulverized and suspended in deionized particle-free water where they were ultrasonified for 45 to 60 minutes. For each sample, an approximately 10 microliter drop of the suspended solution was deposited on a carbon film coated copper TEM grid and allowed to dry. Each sample was then analyzed under Transmission Electron Microscopy at 20,700X in which 4 to 10 grid squares were examined depending on the sample distribution and/or the detection of amphibole asbestos. '' Results Analysis of the 11 samples indicates that the Garlock asbestos-containing gaskets from the OSN Gypsie are virtually free of amphibole asbestos with the exception of small amounts of amosite and actinolite detected in three samples. (See Table A) Repeated analysis indicates that the amphiboles found in the gasket samples, although in small quantity, were a constituent of the material and were not caused by some form of contamination. Table A Results of Analysis by Transmission Electron Microscopy for Chrysotile Homogeneity McCrone Project No. ME-1537 Gasket No. 1 Grid Square No. 1 2 3 4 5 6 7 8 9 Fiber Type * * * * * Amosite Amosite Amosite Amosite Length/Width (in urn) * * * * * 2.40 X 0.01 0.05 X 0.004 0.69 X 0.01 3.60 X 0.02 Gasket No. 2 1* 2* 3* 4* 5* 6* * amphibole asbestos not detected * * * * * * Gasket No. 3 Grid Square No. Fiber Type 1* 2* 3* 4 Actinolite 5 Actinolite 6* 7* 8 Actinolite 9 Actinolite Gasket No. 5 1 2 3 4 5 6 * * * * * * Gasket No. 6 1 2* 3* 4* 5 *. 6 Actinolite Amosite * amphibole asbestos not detected Length/Width (in urn) * * * 0.14 z 0.02 0.05 x 0.01 * * 0.10 x 0.01 0.10 x 0.04 * * *' * * * * * * * * 0.17 x 0.02 0.12 x 0.02 Gasket No. 6 (cont.) Grid Square No. Fiber Type 7* 8* 9* 10 * 11 * * amphibole asbestos not detected Gasket No. 7 1 2 3 4 5 6 * * * * * * Gasket No. 8 --- - Length/Width (in urn) * * * * * * * * * * * Gasket No. 9 Grid Square No Fiber Type 1* 2* 3* 4* 5* * amphibole asbestos not detected Gasket No. 10 1 2 3 4 5 * * * * * Gasket "A" 1* 2* 3* 4* 5* * amphibole asbestos not detected Length/Width(in um) * * * * * * '* * * * * * * * *