Appendix D_Engineering Report

    Maintenance Frequency                                        Although HumeCeptor® will continue to operate
                                                                 effectively until sediment completely fills the
    It is generally recommended that inspection of the unit      treatment chamber. It is still deemed good practice
    to be undertaken every three months for the first year of    that maintenance should be performed “annually” or
    operation. This schedule may then be relaxed after a year,   “once the sediment depth exceeds the guideline values”
    when confidence is gained regarding the actual pollutant     provided in Table 2, whichever condition is achieved first.
    load and run-off generated by the up-stream catchment.
    A more frequent program may be required where there is       HumeCeptor® units are often installed in areas where
    greater risk of oil spills.                                  the potential for hydrocarbon spillage is great. However
                                                                 HumeCeptor® should be cleaned immediately after any
    You may elect to undertake inspection yourself or            major spill occurs, by a licensed liquid waste contractor.
    choose to contract a waste management company to             You should also notify the appropriate regulatory
    obtain a complete inspection and maintenance package.        agencies as required in the event of a spill.
    Contact the nearest Humes office for recommendations/
    information regarding companies, which have the
    capabilities to provide an inspection and maintenance
                                                                 Removal of Hazardous Material
    service in your area.
                                                                 The requirements for the disposal of material removed
                                                                 from the HumeCeptor® are similar to that of any other
    The need for maintenance can be determined easily by
                                                                 stormwater treatment device. Local guidelines should be
    inspecting the unit from the surface. The depth of oil in
                                                                 consulted prior to disposal.
    the interceptor can be determined by inserting a dipstick
    in the oil sample port. Similarly, the depth of sediment
                                                                 The sediment, once de-watered, may be suitable for
    can be measured from the surface without entry into
                                                                 disposal in a sanitary landfill. It is recommended to check
    the HumeCeptor® via a clear tube (Sediment sampler) -
                                                                 with the relevant authorities in your local area as some
    sediment sampler tubes are available from Humes. The
                                                                 local authorities may require testing of the sediment
    sampler is inserted in the 610 mm opening in the “disc”
                                                                 prior to disposal.
    in-line models and through the 100 mm oil sample port
    in the “inlet” models.
                                                                 All petroleum waste-products, collected in the
                                                                 HumeCeptor® (oil/chemical/fuel spills), should
    As a general rule an annual maintenance schedule is
                                                                 be removed and disposed of by a licensed waste
    recommended. However maintenance requirement
                                                                 management contractor.
    frequency will vary with the volumes of stormwater
    pollution generated by your site (number of spills,
    amount of sediment, etc.). So while annual maintenance
    is recommended, the frequency of maintenance may be
    varied (increased or reduced) based on local conditions;
    if the unit is filling up with sediment more quickly than
    projected, maintenance may be required semi-annually;
    conversely once the site has stabilised maintenance may
    only be required every two or three years.




7   HumeCeptor® system