16-001014-02A (Ultimate SCMMP)

                                                                                                                                 HumeGard® GPT
Maintenance cost                                               Removal of hazardous material

The costs to clean out a HumeGard® will vary based             A wide range of hazardous materials may be intercepted
on the size of the unit, pollutant volume/type and             by the HumeGard® gross pollutant trap, although
transportation distances.                                      instances of this have been minimal. Hazardous materials
                                                               may include high levels of heavy metals accumulated
A typical cost (equipment and personnel) is estimated          within the collected sediments, certain inorganic
to be approximately $1500-$3500 (based on best                 chemicals, used syringes, glass, and other matter.
information at time of installation) - exclusive of disposal
costs.                                                         As noted, the potential presence of hazardous material
                                                               is primarily the reason why eduction is the preferred
This estimated cost is based on the clean out of a single      cleaning method, since this minimises the potential for
unit. Economies of scale will be achieved where there          maintenance personnel and nearby communities to
are multiple units for a given location. The time to clean     come into contact with such material. Where baskets
a single unit is approximately 3-4 hours (including            are required, the majority of the collected material will
transportation and cleaning).                                  fall from the basket into the maintenance truck upon
                                                               opening of the trap door. Any and all contact with the
Disposal costs are estimated to be in the order of             basket should be undertaken with suitable protective
$350-$600 dependent upon volume and type of                    clothing, including heavy duty hand protection. If
pollutants removed from the holding sump.                      material is caught within the basket, it should be
                                                               removed using suitable equipment.


                                                               Removal of this material by hand is not recommended.
                                                               It is noted that it is not necessary to have the sumps/
                                                               baskets completely clean. The removal of 95% of the
                                                               material is satisfactory, and the prospect of completely
                                                               removing every piece of material increases the
                                                               occupational health and safety risks.


                                                               The presence of certain toxicants may need to be
                                                               considered for the disposal of material and appropriate
                                                               locations. If elevated levels of toxicants are suspected,
                                                               then analytical screening of material should be
                                                               completed to determine an appropriate disposal response
                                                               according to local and state government regulations.




                                                                                                             HumeGard® GPT   6