Document 1Q6yY9ykK6N5ZELv6Dr9E48kE

Vista Chemical Company 15990 North Barker's Landing Road Post Office Box 19029 Houston, Texas 77224 Phone {713} 531-3200 Revised September 23, 1987 VKIA Mr. Bob Sabol StillMeadow Inc. 9525 Town Park Drive Houston, TX 77036 Dear Bob: This letter is to authorize you to proceed with the testing of Vista ALFONIC 1618-65 Alcohol Ethoxylate and the Calcium Aluminum Sulfate Oxide sample as specified below. Protocol Number Calcium Aluminum Sulfate Alkoxide Vista ALFONIC 1618-65 S9-F24-VI-092187-2 S9-F14-060287-1 S9-F24-060287-2 S9-F34-060287-3 S9-F43-VI-092187-1 Sincerely, Thomas G. Grumbles Environmental Quality Manager ajo cc Carl Kerfoot Allen Nielsen VVV 000015047