Document Yjx0e87Dx4JJqv55Kxm4yQMKE

KODARAS ACOUSTICAL LABORATORIES n, erv;PON Of MICHXU J. IOOAJUS. INC. 75-02 5U AVENUE/ELMHURST, NEW YORK 11373/TEIEPHONE 2\2-U6ASSQ July 17th, 1967 Sprayed Mineral Piber Manufacturers Association, lac* c/o Mr. H. X* Xevina Xabestospray Corporation 1060 Broad Street Xewark, Kev Jersey 07102 Bear Bert} In accordance Kith the SJiFMA letter of July 3rd, 1967 signed by X. Xevine, we hare proceeded to test erosion of sanple #1 at n. air velocity of 2000Vain As you know, this saaple has been run at 800' velocity for a total period (including purge) of 48 hours The 2000*/ain* test was conducted exactly as described in our report dated July 10th, 1967* The results were as follows! 3 hours - 2010 fpa 3 hours - 2006 fpn 18 hours - 2002 fpm 24 hours - 2006 fpa Bet Gain SP/Gr.- .009 (.01) .009*(.01) .009 (.01) .009 (.01) Please advise if you wish any further tests conducted in series. Tours sincerely, SODARAS ACOUSTICA! LABORATORIES HICHAU. J. XODAEAS, IHC. Michael J# Bodar&s President KJStsl CC! Mr. .Harry Vilson hr. Morris Xieff Mr. Prank Stuapf