Recycling Treated Municipal Wastewater for Industrial Water Use

TM2: Sampling Plan and Results
Recycling Treated Municipal Wastewater for Industrial Water Use
Craddock Consulting Engineers 5
In Association with CDM & James Crook
TM2-Sampling_0707.doc
Table 3. Sampling Program Constituents
Alkalinity (as CaCO3)
Aluminum (Al)
Bicarbonate (HCO3)
Calcium (Ca)
Chloride (Cl)
Color
E. Coli
Iron (Fe)
Hardness (as CaCO3)
Magnesium (Mg)
Manganese (Mn)
Silicondioxide (SiO2)
Sulfate (SO4)
Total Coliform
Total Dissolved Solids (TDS)
Total Organic Carbon (TOC)
Turbidity
2.2 Sample Type, Collection, and Location
The Council handled all sampling and laboratory analyses. Samples were collected at
the same location used to characterize the final effluent for permit monitoring. The
routinely collected daily sample at the Metro Plant was used for this project’s
sampling program. An additional sampler was required at the other three plants
because there is an insufficient sample volume routinely collected at those facilities
for the additional analyses required by this sampling program. The samplers collected
flow-weighted 24-hour composite samples, except at the Empire WWTP, which
provided a time-weighted composite sample. The Council’s Industrial Waste
department staff setup and managed the sampler operation. Operators at each plant
collected this program’s samples at the same time as they collected the routine
effluent samples.
The first sampling period included 8-15 samples collected over a three week period in
late October to early November. Samples were collected on weekdays and weekends
whenever routine samples were collected. After review of the Fall 2006 results it was
determined that additional sampling would strengthen confidence in understanding
constituent variability. A spring sampling schedule was performed: during the first
three weeks of April, 8-12 samples were analyzed for the constituents listed in Table 3.
All available data for the routine monitoring program were obtained for the similar
time periods. The sample count varied with each plant based on the NPDES permit
requirements.