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1 . The main bearings in the gear box which turns the drum of our <br /> primary compost stacker failed on October 8, 1994. The date of <br /> the original sample which produced the elevated trace metals result <br /> was October 21 , 1994. This stacker is used to turn, aerate, and <br /> moisture condition (if necessary) the unfinished compost, and is <br /> used 5-6 times on any given batch of compost. According to the <br /> bearing manufacturer, MO is an alloy of the bearings. Attached are <br /> copies of the shop repair order showing the date of the repair and <br /> the materials which were used as well as the metallurgy report <br /> showing the various alloys by percent. <br /> 2. The lubricating grease (Moly-Grease) used in the gear box also <br /> contains MO. Attached is a copy of the MSDS verifying this. <br /> We have concluded that at the time of the bearing failure, the seals on the <br /> gear box were compromised and a trace amount of bearing grit and grease, <br /> which both contain MO, came into contact with the compost which was <br /> presently being turned. After the gear box repair was completed, turning of the <br /> unfinished compost was resumed and the small area which was contaminated <br /> with MO was further reduced through additional turnings. <br /> The initial sampling of October 21 contained a trace amount of the <br /> compost which had come into contact with the MO through the bearing failure, <br /> but because of repeated turnings the contamination had already been diluted, a <br /> fact that is verified through the 2 retests of the original sample. <br /> Therefore, we conclude that the trace metal MO exceeding the allowable <br /> limits was an isolated occurrence which has already been corrected through <br /> repeated blending via turnings. Additionally, we feel that the latest test results <br /> verify that the pile is within the acceptable range from feed stock through <br /> finished product. <br /> We intend to continue to monitor the trace metals as part of our ongoing <br /> testing program and are scheduled to next test on February 15, 1995. <br /> If you have any questions, please call our office. <br /> Sincerely, <br /> �ack Fiori <br /> Plant Manager <br /> cc: George Eowan @ Integrated Recycling Inc. <br /> F:ADMIN\SJCFOLLO.UP <br /> 2 - <br />