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Kennewick:
8am to noon
1pm to 5pm
Monday-Friday
Pasco:
8am to noon
1pm to 5pm
Monday-Friday
Prosser Office
NEW HOURS!
Immunizations: Tuesday and Thursday; 9am to Noon and 1pm to 5pm.
Environmental Health: Monday and Thursday; 9am to 10:30am.
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Solids Analysis
Solids are categorized into several groups based on particle size and characterization.
Most wastewaters are analyzed for one or several of the following types.
Total Suspended Solids (TSS)
Total Dissolved Solids (TDS)
Volatile Suspended Solids (VSS)
Total Solids (TS)
Analysis of solids in domestic wastewaters allow system operators to determine treatment
efficiency as well as determining compliance with various regulatory agencies.
Total Suspended Solids
TSS are the amount of filterable solids in a water sample.
Samples are filtered through a glass fiber filter. The filters are dried and weighed
to determine the amount of total suspended solids in mg/l of sample.
Total Dissolved Solids
TDS are those solids that pass through a filter with a pore size of 2.0 micron.
or smaller. They are said to be non-filterable. After filtration the filtrate (liquid)
is dried and the remaining residue is weighed and calculated as mg/l of Total Dissolved Solids.
Volatile Suspended Solids
Volatile solids are those solids lost on ignition (heating to 550 degrees C.)
They are useful to the treatment plant operator because they give a rough approximation
of the amount of organic matter present in the solid fraction of wastewater, activated
sludge and industrial wastes.
Total Solids
TS are the total of all solids in a water sample. They include the total suspended solids,
total dissolved solids, and volatile suspended solids.
Sample Submission
Due to workload and facility requirements all wastewater samples must have prior approval.
All samples must be submitted in approved containers and delivered to the laboratory at
471 Williams Blvd. Richland, WA. Inquires about sample analysis not listed are welcomed
and will be accommodated whenever possible.
For additional information please contact Dave Miller at (509) 460 4206
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About the BFHD 
Benton Franklin Health District