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-4 P /EST-PAINE JaJ^yuUotieA we. i 7979 GSRI AVE. BATON ROUGE, LA 70820 N klb V. ASBESTOS FIBER COUNT ANALYSIS FOR DOW CHEMICAL Industrial Hygiene Bldg. 3502 W Post Office Box 150 Plaquemine, LA 70764 ATTENTION: Ms. Darlene Creel March 16, 1992 received MAR 2 3 1992 IND. HYGIENE DEPT. 20-2163 DO A 114617 CONFTDFNTTAL A Member of the Inchcape Environmental Group p . ,EST-PAINE J^aJxnatcnleA inc /KJL#' 7979G5RIAVE. BATON ROUGE, LA 70820 DOW CfQMXGAXi Plaquemine, LA March 16, 1992 Three (3) filter cassette samples were received on March 11, 1992 from Dow Chemical for fiber count. Fibers larger than 5 microns in length were counted by means of phase-contrast microscopy at a magnification of 400X. The procedure recommended by NIOSH method 7400A was followed. Pertinent information regarding fiber counts is as follows: Field Area: 0.00785 mm2 (Walton Beckett Graticule) Effective Collecting Area: 385 mm2 (25 mm Cassette) 855 mm2 (37 mm Cassette) Limit of Quanititation: 10 fibers/100 fields Limit of Detection: > Average Blank Count @ Detection limits are based upon a minimal concentration of 7 fibers/mm2. Sample I.D. Fibers (>5um) Observed No. of Fields Observed Fibers per Filter Volume of Air (L) Fibers (>5um) per c.c. of Air Glycol II: 13923 Blank #1 Blank #2 74 0 0 100 100 100 36,293 <490 <490 -- ----------- -- ------ -- - 20-2163 Philip W. west, Ph, Laboratory Director A Member of the Incheape Environmental Group A 114618 CONFIDENTTAL WEST PAINE LABORATORIES INC. 7979 GSRl AVIS. BATON ROUGE, LA 70820 PO MSI #. /5 MS IS_ Sample I.D.: a3 AkuJe*11 CHAIN-OF-CUSTODY RECORD SAMPLE COLLECTION: Collector's Name: Darlene S. CreelTelephone: 1504) 389-6181 Company Name: Dow Chemical (Industrial Hveiene Bldg. 3502W1 Address: P.O. Box 150. Plaouemine. Louisiana 70765-0500______________________ 3Date Sampled: _______________________ Time: Type of Process or Facility Sampled: Fiber count via NIOSH 7400__________________ Field Information: Filter cassettes for fiber per filters Address: 7979 GSRI AVENUE. BATON ROUGE LOUISIANA 70820 PHONE:(504), 769-4900 Sample DispositionStorage Further TransportationOther CHAIN-OF-POSSESSION: (Attach additional sheets as needed to show continuity) TERMINATION OF CHAIN OF CUSTODY: DO A 114619 confidential Authorized by:Date:Time:, Company/Name:Address: