Independent Tests

November 10, 1997

Mansur Industries Inc.
8305 NW 27th Street
Suite 107
Miami Florida 33122

Attention: Mr. Paul I. Mansur

Subject: Results of Waste Minimization Study Conducted at Greenwich Air Services
SYSTEMOne
LAW Project Number 40740-7-0187

Dear Mr. Mansur:

Law Engineering and Environmental Services (LAW) was retained by Mansur Industries to conduct a waste minimization study at Greenwich Air Services in Miami, Florida. Our study indicates that Greenwich Air Services has realized a parts washer solvent waste reduction of 98 to 99% by converting to SYSTEMOne parts washers in place of Safety Kleen® units.

During the month of October, LAW monitored the quality of waste residue from the SYSTEMOne parts washers located at Greenwich Air Services, 4590 NW 36th Street, Miami, Florida. On September 25, 1997, LAW personnel drained from the fifteen SYSTEMOne units on site. The machines were sealed to detect attempts at tampering or draining by facility personnel. After approximately one month, on October 23 and 24, 1997, LAW returned to the facility and drained the residue from the parts washers into a tared, graduated five-gallon bucket. At that time, the units were inspected for tampering and no indication was found. Following draining of the units, the total volume was measured and the total weight determined. Total weight of the SYSTEMOne residue was compared with Safety Kleen® waste manifests completed from April to December 1996 to determine the percentage of waste minimized.

Based on our study, during the month of October, a total of 18.6 pounds (lbs) of residue was generated by all the SYSTEMOne parts washers. The Safety Kleen® waste manifests indicate 1996 monthly hazardous waste generation between 951 to 3,015 lbs, with an average of 2,174 lbs. See table 1 for additional details. As previously indicated, we calculated that by substitution of the Safety Kleen ® units with SYSTEMOne parts washers, Greenwich Air Services has minimized this hazardous waste stream by as much as 99%. See figure 1 a graphical comparison of waste generation results.

Based on the information provided to us by Greenwich Air Services, the type and level of parts washing activities during the study period were representative of the type and level conducted during 1996. Therefore, we believe the comparison of monthly waste generation results is both relevant and appropriate. In addition, because the SYSTEMOne units are dedicated to individual activities within the facility, it is not expected that the monthly waste generation per activity would alter appreciably.

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5854 N.W. 158th Street Miami Lakes, Fl 33014
(305) 826-5588 Fax (305) 826-1799