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• July 11, 1990 Mr. Larry Hamer Director of Public Works City of St. Anthony 3301 Silver Lake Road St. Anthony, MN 55418 RE: Temporary GAC System RCM Project No. 861908-3 Dear Mr. Hamer: The enclosed invoice represents our involvement during the past month with the temporary water treatment system. In accordance with your instructions, we have ceased all involvement in the advance preparation of the next set of Land Disposal Notification and Certification Forms. These forms will have �El to be completed for each vehicle prior to the next shipment of spent carbon. Hopefully, it will be the last under this contract. Considerable time was spent in February resolving an apparent discrepancy rieke in the classification codes that Calgon Carbon was told it was going to receive carroll and the actual waste codes received. This confusion between the various uller ssociates, inc. regulator} agencies and the changing rules makes the process eery time engineers consuming. A clarification letter was sent to Mr. Kevin Hengst February 28, ard'hitects 1990 resolving this issue (see attached copies). land surveyors equal opportunity During the first week of April, we received a forward copy of Mr. Kevin employer Hengst March 28, 1990 letter and accompanied "Land Disposal Restriction Notification and Certification Form" from you. Upon receipt, a forwarded copy of Mr. Hengst's April 17, 1990 letter, together with your note to do what is needed to stay within the boundary of the law, we followed up on the questions involved. It was during this review in April and May that the question of final carbon disposal of previously removed material was raised, and the request to Calgon Carbon was made, for a certificate of destruction of the removed carbon. We have received our copy of the requested statement of final carbon regeneration and you should have received the original. Initial time was spent during this period of time to address the new notification and certification form. Invoice No. 2182 in the amount of $1,092.00 covered a two month period of time, February and March, and includes some of the above activities. A major portion of the work was done in April as reflected in the May Invoice No. 2235. Final completion extended into May and is included on the June Invoice No. 2290. Following your instructions, work was stopped on this form. We will continue monthly invoicing and provide a description of our • work efforts on each project, thus assisting you with the Council. 10901 red circle drive box 130 minnetonka, minnesota 55343 612-935-6901