City of Sunnyvale Waste Characterization Report

City of Sunnyvale Waste Characterization Report
8. At the end of each sampling day, the sampling crew manager will collect the SAMPLE
placards with recorded transaction numbers and net weights from the scalehouse staff.
Summary of Expected Roles for Facility Staff in Selecting C&D Loads:
The sampling crew manager will communicate to the scalehouse attendant when the
sampling crew is ready to receive the first load of C&D waste during a given dayThe types of
loads that will be called for include:
— Commercially hauled C&D
— Self-hauled C&D
When the next load arrives that matches the type needed by the sampling crew, the
scalehouse attendant will stop the vehicle and query the driver to ensure that the waste fits
into one of the two C&D categories. If the load meets the selection criteria, then the
scalehouse attendant will write the vehicle's license number (or the transaction number) on
the SAMPLE placard and will place the placard on the vehicle's windshield and instruct driver
to go to the sorting area.
When the selected vehicle returns to the scalehouse after having tipped its load, the
scalehouse attendant will retrieve the SAMPLE placard and will write the net weight on the
placard.
The sampling crew manager will collect the completed placards from the scalehouse
attendant at the end of each day.
Sampling and Characterization of Hand-sorted Waste Samples
When a load from a scheduled single-family, multifamily, or commercial route arrives at the
sampling area, the sampling crew manager will confirm information about the load, as discussed
in the previous section, and the driver will be directed to tip the load in an elongated pile below
the operating face of the landfill. At this point, the pile will be divided into an imaginary 16-cell
grid, as shown in the diagram below, and a sample of waste consisting of 200 or more pounds of
material will be extracted from a randomly selected cell using a loader or other machinery
operated by facility staff. Residual loads sampled from the SMaRT Station MRF will consist of
samples weighing 125 pounds or more. This material will be placed on a tarp. After the
extracted material is deposited on the tarp, the sampling crew manager will estimate the weight
of each sample. If judged to be less than 200 pounds, additional material will be pulled from the
same cell area until the desired weight is achieved. Samples judged to be excessively heavy will
be pared down by removing a homogenous slice of material from the tarp. After the sample has
been obtained, the remainder of the load can be removed from the tipping area.
_ 68 November 2010