Underground Construction - November 2021 - 10

NEWSLINE LATEST INDUSTRY DEVELOPMENTS
The U.S. Environmental Protection Agency said
recently it is launching a comprehensive plan to
tackle PFAS contamination around the country.
Gov. Janet Mills said that resources from the
federal government will make it easier for states
and local communities to mitigate the problem.
Maine has also installed drinking water
treatment systems and established wastewater
sludge testing requirements to try to get a handle
on PFAS contamination.
Construction Begins to Improve
Water Quality of Los Angeles
River and Arroyo Seco
As part of a comprehensive eff ort to improve the
water quality in the Los Angeles River and Arroyo
Seco, the City of Los Angeles Department of
Public Works will soon break ground on the
$13 million Low Flow Diversion (LFD) Project.
The project, led by global design fi rm
Stantec's Pasadena offi ce, in collaboration
with Los Angeles Department of Public Works
Bureau of Engineering (BOE) and Los Angeles
Sanitation & Environment (LASAN), will provide
new infrastructure to remove dry-weather fl ows
from fi ve sub-watersheds to the LA River and
Arroyo Seco.
When completed, the project should divert
about 1 million gallons per day from storm
drains, while providing no negative impact on
wet-weather fl ows from storms. Construction,
which is led by Clarke Contracting Corporation
for Los Angeles River LFD projects and Mike
Pirch and Sons for Arroyo Seco LFD projects, is
expected to be complete by November 2022.
Both the LA River and the Arroyo Seco are
negatively impacted by multiple pollutants
contained in dry-weather fl ows. At times, high
levels of bacteria in the two waterways rival that
of wastewater. Heavy metals and petroleum
products are also washed into storm drains and
waterways. Dry-weather fl ows are usually a
combination of runoff from car washing, lawn
sprinkling, and watering of plants/gardens.
Mississippi City Dumped
6B Gallons of Partly
Treated Sewage
Mississippi's capital city of Jackson dumped
more than 6 billion gallons of partly treated
sewage into a river in 2020, seven years after
signing a federal court agreement to clean up its
act, court records show.
The city had made " only limited progress "
toward some requirements in a 2013 agreement
with the U.S. Environmental Protection Agency
and had not begun work toward other " crucial "
goals, according to an August status report.
Jackson has a deadline of late 2030 to meet terms
of the consent decree, which was announced in
November 2012 and became fi nal in March 2013.
The city, which agreed to spend about $400
million to comply with state and federal water
laws, now will need nearly $960 million to do so,
it said in the report. Jackson is negotiating with
the EPA to amend the order.
The untreated sewage in 2020 came from
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10 NOVEMBER 2021 | UCONonline.com
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Underground Construction - November 2021

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