J03 Water Quality Testing Requirements.pdf
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This file contains water quality testing requirements from the Washington Administrative Code (WAC) Section 246-291-171, detailing the Maximum Contaminant Limits (MCLs) for various substances that must be tested in water samples. The document is an appendix that specifies testing parameters for a new test well project in Mossyrock, WA.
The requirements are divided into two main tables: Table 1 lists inorganic chemical characteristics with primary and secondary MCLs for 24 substances including antimony, arsenic, mercury, and lead, measured in mg/L. Table 2 covers physical characteristics including turbidity (primary MCL of 1.0 NTU) and secondary parameters like color (15 Color Units), specific conductivity (700 umhos/cm), pH (6.5-8.5), and total dissolved solids (500 mg/L). A bacterial test is also required, though specific parameters are not detailed in these tables.
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Chemicals required to be tested and corresponding Maximum Contaminant Limits (MCLs), modified from the Washington Administrative Code (WAC) Section 246-291-171. Note: A bacterial test is also required.
Table 1
INORGANIC CHEMICAL CHARACTERISTICS
Substance Primary MCLs (mg/L)
Antimony 0.006 Arsenic 0.01 Barium 2.0 Beryllium 0.004 Cadmium 0.005 Chromium 0.1 Cyanide 0.2 Fluoride 4.0 Mercury 0.002 Nickel 0.1 Nitrate (as N) 10.0 Nitrite (as N) 1.0 Selenium (Se) 0.05 Sodium (Na) * Thallium 0.002
Substance Secondary MCLs (mg/L)
250.0
2.0 0.3
0.05 0.1 250.0
Chloride (Cl) Copper (Cu)** Fluoride (F) Iron (Fe) Lead (Pb)** Manganese (Mn) Silver (Ag) Sulfate (SO4) Zinc (Zn) 5.0
*Although there is not an established MCL for sodium, there is enough public health significance connected with sodium levels to require inclusion in inorganic chemical and physical monitoring.
**MCLG (Maximum Contaminant Level Goal), as set by the Washington State Department of Health Lead and Copper Rule.
1.3
0.015
Table 2
PHYSICAL CHARACTERISTICS
Substance Primary MCL Turbidity 1.0 NTU
Substance Secondary MCLs Color Hardness Specific Conductivity Total Dissolved Solids (TDS)
15 Color Units None established 700 umhos/cm 500 mg/L pH
Alkalinity (as CaCO3)
6.5 – 8.5 None established
| Table 1 |
| Table 2 |
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