5.2.1.1 Direct Dump. With this method, solid waste is dumped directly i
the trailer from the collection vehicle from an elevated ramped area (see
Figure 4). This method is suitable for solid waste quantities up to 100
cubic yards (76 cubic meters) per day.
5.2.1.2 Dump to Storage Pit. For this system, solid waste collection
vehicles dump directly into a storage pit where the waste materials are
crushed by crawler tractors and then pushed over the ledge of the storage
area into the trailer. This method is generally employed where solid was
quantities delivered exceed 500 cubic yards (380 cubic meters) per day.
5.2.1.3 Dump to Tipping Floor. This method is similar to the storage pit
method, except solid wastes are dumped onto a tipping floor rather than a
storage pit, crushed by crawler tractors, and pushed into the trailer (se
Figure 5). This method is used effectively when solid waste delivery rat
range from 100 to 500 cubic yards (76 to 380 cubic meters) per day.
5.2.2 Compaction Systems. These systems are generally employed only at
locations where solid waste delivery rates exceed 500 cubic yards (380 cu
meters) per day. In a hydraulic compaction system, a transfer trailer is
backed into position and locked to a stationary compactor firmly anchored
a concrete foundation. The compactors used are large, heavy-duty units
capable of handling most materials and producing the waste densities
necessary to obtain maximum legal payloads. During operation, solid wast
is loaded to the compactor from a hopper and the hydraulically powered
reciprocating ram of the compactor forces the refuse horizontally through
the door in the rear of the transfer trailer. At the disposal site, the
entire rear section of the transfer trailer is opened and the waste pushe
out by an ejection ram. Because this system requires that the transfer
trailer be attached to the compactor, any hydraulic compaction system
prohibits the use of drive-through arrangements.
There are several methods of feeding waste to the compactor hopper
including:
a) Direct dump into the hopper.
b) Dump into a hydraulic push-pit equipped with a hydraulically
activated ram which automatically feeds waste into the hopper.
c) Dump into a storage pit or tipping floor where waste is crushed
and pushed into the hopper by a wheel loader or crawler tractor.
d) Dump into an inclined conveyor which automatically feeds waste
into the hopper.
Table 8 presents a summary of transfer station systems available for
use at Navy installations, including advantages and disadvantages of each
system.
5.3 Environmental Impacts. The environmental impacts associated with th
transfer and haul of unprocessed solid waste include:
5.3.1 Noise. Sources of noise at the transfer station include the
operation of collection and transfer vehicles, and any loading and
compacting/tamping equipment.
5.10-28
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