6-Water Quality Testing Requirements.pdf
PDF 69 KB Posted
- Attached to
- Florence Wells Well (Quinault)
- Solicitation number
- 75H70124Q00010
About this file
This document outlines water quality testing requirements and specifications for a residential drinking water well project. The Indian Health Service seeks a contractor to drill a new test well consisting of welded steel casing, PVC liner as needed, a sanitary seal, well screen as needed, well development, test pumping, and water sampling. The estimated well depth is 250 feet. The contractor must obtain any required permits from the Department of Ecology and Washington Water Resources Department. Testing will be conducted for inorganic chemicals and physical characteristics according to Maximum Contaminant Levels and secondary standards provided for various substances such as arsenic, barium, chromium, fluoride, lead, and turbidity.
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Text version
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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