7-Water Quality Testing Requirements.pdf
PDF 69 KB Posted
- Attached to
- Jeremy Swanson Well (Snoqualmie)
- Solicitation number
- 75H70124Q00013
About this file
This document outlines water quality testing requirements and standards for a residential drinking water well project. The contractor shall drill a well to an estimated depth of 220 feet on fee land in Snoqualmie, Washington. Testing will include inorganic chemicals, physical characteristics, and bacteria as specified by Washington regulations. Inorganic chemicals such as arsenic, beryllium, and nitrates must meet Primary Maximum Contaminant Levels. Secondary standards also apply to characteristics including chloride, fluoride, iron, manganese, and pH levels. The contractor is responsible for any required permits and will conduct well development, test pumping, and water sampling. The opportunity was issued by the Department of Health and Human Services Indian Health Service under solicitation number 75H70124Q00013.
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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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