EnviroTank Details & Certification

                                                Report No 285/4102208-2

                                                Page 4 of 5

EXAMINATION AND TEST (CONTINUED)

CLAUSE                                                                     ASSESSMENT

4.       TEST AND ASSESSMENTS (CONTINUED)

4.3      Test procedure for nominal size and class (continued)

         The effluent samples taken during the test were examined for
         their light liquid content. The results were as follows.
                               Maximum                      Actual
                           Light liquid (mg/l)       light liquid (mg/l)
         Sample 1                 -                           1.4                     -
         Sample 2                 -                           0.5                     -
         Sample 3                 -                           0.2                     -
         Sample 4                 -                           0.3                     -
         Sample 5                 -                           0.7                     -
         Average                  5                           0.6                  Pass

4.4      Sludge traps

         The sludge trap was constructed with a flow control device at
         the inlet to reduce the inflow velocity and provide a uniform
         flow pattern.                                                             Pass

         The device was designed to avoid short circuit and allow
         sediment to settle.                                                       Pass

         The capacity for silt storage (C) was provided as a separate
         upstream unit, manufacturers type QG 15. The capacity was
         determined by calculations made from manufacturer's drawing
         number 2271 dated 21 January 2000.                                        Pass

                                             Specified         Actual
         C(l) =                              1500 min          1996                Pass

4.5      Closure devices

         The separator was provided with an automatic closure device.              Pass

         The closure device was operated by the accumulated light
         liquid.                                                                   Pass

4.6      Access for cleaning and inspection of separator

         The separator was provided with sufficient access points to
         allow for inspection and cleaning of the internal chamber.                Pass