Friday, April 20, 2012

Baseline Testing Less Common Parameters with and without Standards

Elements with or without EPA Drinking Water Standards

Antimony- The EPA primary drinking water limit of 0.006 mg/L.

Cobalt - The PA Statewide Health Standard Guidance for Brownfields - recommends a Cobalt concentration of less than 0.011 mg/L for residential areas with a total dissolved solids of 2500 mg/L. (Source: “Pocket Guide to Statewide Health Standards, January 2011).
Additional Information on Cobalt -

Molybdenum - No specific drinking water standard, but the WHO recommends a level of less than 0.07 mg/L and in Wisconsin the standard is 0.040 mg/L.

Nickel - EPA Suggested a Maximum Contaminant Level of 0.1 mg/L

Silver - < 0.05 mg/L Maine  and < 0.1 mg/L (World Health Organization)

Amounts of silver in drinking water over the drinking water standard of 0.05 milligrams per liter may cause a permanent blue-gray discoloration of eyes, skin and mucous membranes.

Thallium – The EPA primary drinking water limit of 0.002 mg/L.

Thorium The EPA has set a drinking water limit of 15 picocuries per liter (15 pCi/L) of water for gross alpha particle activity and 4 millirems per year for beta particles and photon activity (for example, gamma radiation and x-rays).
Vanadium - Action Level in California at 0.050 mg/L - inform public at 0.015 mg/L

A Well by Well - Review of the Data for Dimock, PA collected by EPA

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