Document g2V68xoYExLyBbdq6ym780oRa

Vista Chemical Company 15990 North Barker's Landing Road Post Office Box 19029 Houston, Texas 77224 Phone (713) 531-3200 July 1, 1988 Mr. Mark Oberle Winnebago Drainage Systems P.0. Box 167 Mankato, MN 56001 XF` t-. a VISTA Dear Mark: John Telford ask that I respond to your question regarding residual vinyl chloride levels in the Vista 5585-3 PVC Resin you purchase. Based on a review of the March to May shipments, the residual levels average 0.8 ppm. The actual -number for each shipment is provided to you with the certificate of analysis that accompanies each load. Please call me at 713/531-3445 if you have further questions on the above. Sincerely, Thomas G. Grumbles, C.I.H. Environmental Quality Manager aj o cc John Telford VVV 000014527