Monday, January 22, 2018

Changes To Minnesota Water Based Health Risk Limits

The Minnesota Department (MDH) is proposing amendments to the Health Risk Limits (HRLs) Rules and to adopt new and updated human health-based water guidance values into rule. The chemicals proposed for amendment include herbicides and other pesticides, polyaromatic hydrocarbons (PAH) and volatile organic compounds (VOC). Below is a listing of chemicals MDH is considering in its rule revision:

Chemical Name Previously adopted values in HRL Rule?
Acenaphthene Yes
Acetochlor Yes
Acetochlor ESA Yes
Acetochlor OXA Yes
Alachlor Yes
Chloroform Yes
Clothianidin No
Cyanazine Yes
cis-1,2-Dichloroethene Yes
2,4-Dichlorophenoxyacetic acid (2,4-D) Yes
Dieldrin Yes
Dinoseb No
S-Ethyl-N,N-dipropylthiocarbamate (EPTC) Yes
Fluoranthene Yes
Perfluorobutyrate (PFBA) Yes
Perfluorooctanoic Acid (PFOA) and Salts Yes
Perfluorooctane Sulfonate (PFOS) and Salts Yes
Pyrene Yes
Tetrahydrofuran No
Thiamethoxam No
1,1,1-Trichloroethane Yes
Vinyl Chloride Yes

MDH will accept written comments on the proposed rules amendments through Wednesday, February 21, 2018.

Wednesday, January 17, 2018

Benzo[a]pyrene, BaP Water Health Risk Review

The Minnesota Department of Health-Health Risk Assessment Unit has started a full review of benzo[a]pyrene or BaP. BaP is a chemical formed from combustion, and is one of a larger class of chemicals known as polycyclic aromatic hydrocarbons (PAHs). Sources of BaP can include industrial processes, cigarette smoke, grilled or broiled foods, wood fires, motor vehicle emission, and many other activities that involve combustion of organic material. BaP is classified as carcinogenic to humans by the U.S. Environmental Protection Agency (EPA) and the International Agency for Research on Cancer (IARC). Minnesota Department of Health previously developed water guidance for BaP in 2012 and the current review will update that guidance if deemed necessary.

Tuesday, January 2, 2018

Revisions To Narrative Water Quality Standards Proposed By EPD

The Georgia Environmental Protection Division has proposed revisions to existing rules in the Rules for Water Quality Control at 391-3-6-.03(5)(b) and (c). These proposed changes are intended to clarify certain narrative water quality standards that could apply to all Waters of the State.

The current rules state, in relevant part:
 (b) All waters shall be free from oil, scum and floating debris associated with municipal or domestic sewage, industrial waste or other discharges in amounts sufficient to be unsightly or to interfere with legitimate water uses.
(c) All waters shall be free from material related to municipal, industrial or other discharges which produce turbidity, color, odor or other objectionable conditions which interfere with legitimate water uses.

The proposed revisions would modify these sections (as noted in red) as follows:
 (b) All waters shall be free from oil, scum and floating debris associated with municipal or domestic sewage, industrial waste or other discharges in amounts sufficient to be unsightly or to unreasonably interfere with the designated use of the water body.
(c) All waters shall be free from material related to municipal, industrial or other discharges which produce turbidity, color, odor or other objectionable conditions which unreasonably interfere with the designated use of the water body.

 Comments on the proposed revision are due by January 31, 2018.

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