Document 2NR4a6Vgo4RYLK2R5jaxkbEva

CertamTeed Corporation P O. Box 860 Valley Forge. PA 19482 (215) 687-5000 Certairilee December 11, 1980 Mr. John Corn CTEK 9742 Skillman Dallas, TX 75243 Dear John: Please analyze the enclosed charcoal tube samples for micrograms of epichlorohydrin. The sample numbers are . Number is the blank. Please report results for both sections of the charcoal tubes. Thomas C. Shaffer Corporate Industrial Hygienist TCS/tmf 01-90-1125 CTD016351