Tuesday, September 23, 2014
YOLO COUNTY NEWS
99 CENTS

A tale of two systems

By
From page B3 | January 31, 2013 |

When a rural property owner installs a well system down gradient or too close to a residential septic system, he or she can increase the potential for the well pump to draw septic leachate into water ultimately stored and used within a residence. This unfortunate situation can be expensive to remedy and can have adverse health effects on local residential consumers using the system for drinking water.

Errors similar to the one just described should not be repeated on a grand scale. Unfortunately, proponents of the Woodland-Davis surface water project appear to have made such an error by locating the surface water intake structure for the project on the Sacramento River east of Woodland. This structure is south of a major agricultural discharge at Knights Landing. There, the Glenn-Colusa Irrigation District discharges irrigation return water containing rice herbicide residues and other potentially carcinogenic substances through an outfall directly into the Sacramento River.

During the summer irrigation season, the irrigation return water discharged through the Glenn-Colusa outfall is at a maximum. This maximum discharge coincides with the proposed maximum pumping of Sacramento River water down channel from the outfall by the Woodland-Davis project to meet anticipated summer urban water demand within the two cities.

As a result, there appears to be a conflict between the permitted discharge of irrigation return water from the Glenn-Colusa Irrigation District into the Sacramento River at Knights landing, and the objective of the surface water project to access and treat surface water of unimpaired quality in an economical manner to meet summer urban needs.

The unfortunate placement of a surface water intake structure below a major, permitted agricultural discharge also can be expensive to remedy and can have adverse health effects on all consumers ultimately using the Woodland-Davis system as a source for drinking water. Be cautious in giving blanket approval to this flawed and expensive project!

I received my Ph.D. in aquatic ecology from UC Davis in 1978 and have worked on water quality monitoring and analysis issues for more than 30 years. I was chief of the Bay-Delta Monitoring and Analysis Section with the California Department of Water Resources for 16 years before my retirement.

Steve Hayes
Davis

Comments

comments

Letters to the Editor

.

News

UC joins U.N.-supported Principles for Responsible Investment

By Special to The Enterprise | From Page: A1

 
Nature’s beauty is in our own back yard

By Charlotte Orr | From Page: A1 | Gallery

Jury finds Dixon man guilty of mortgage fraud

By Enterprise staff | From Page: A1

 
 
U.S., Arab allies hit Islamists in Syria, Iraq

By The Associated Press | From Page: A2 | Gallery

Bob Dunning: These are the tanks we get

By Bob Dunning | From Page: A2 | Gallery

 
Wind threatens firefighting effort

By The Associated Press | From Page: A2

Harmony Award nominations sought

By Enterprise staff | From Page: A3

 
Street Food Rodeo rolls into West Davis

By Enterprise staff | From Page: A4

Wolk kicks off ‘Morning with the Mayor’

By Enterprise staff | From Page: A4

 
So you want to be an entomologist?

By Kathy Keatley Garvey | From Page: A4

Sheriff’s Office honored for safe-driving initiative

By Special to The Enterprise | From Page: A4

 
Baha’is celebrate 50th anniversary in Davis

By Special to The Enterprise | From Page: A4

Downtown gift cards get a new perk

By Enterprise staff | From Page: A4

 
Unscheduled landing

By Enterprise staff | From Page: A4 | Gallery

Free community yard sale Saturday

By Enterprise staff | From Page: A4

 
Forum will answer questions about new license law

By Enterprise staff | From Page: A5

 
Pets of the week

By Enterprise staff | From Page: A5 | Gallery

Applications open for Biberstein grants

By Special to The Enterprise | From Page: A10

 
.

Forum

Daughter has her own opinions

By Creators Syndicate | From Page: B5

 
Brother’s drinking out of control

By Creators Syndicate | From Page: B5

Donors support school matinees

By Letters to the Editor | From Page: A6

 
A big Explorit thanks!

By Letters to the Editor | From Page: A6

Teacher tenure becomes key campaign issue

By Tom Elias | From Page: A6

 
Tom Meyer cartoon

By Debbie Davis | From Page: A6

We must not stand for perpetual war

By Special to The Enterprise | From Page: A6

 
Don’t cut all the trees

By Letters to the Editor | From Page: A6

A great Day in the Country

By Letters to the Editor | From Page: A6

 
.

Sports

Davis field hockey team rights ship at Lassen

By Enterprise staff | From Page: B1

 
Devil golfers soar past Sheldon

By Enterprise staff | From Page: B1

Blue Devils bounce back against Pleasant Grove

By Evan Ream | From Page: B1 | Gallery

 
Running game powered Devils in first football win

By Thomas Oide | From Page: B1 | Gallery

UCD roundup: Aggie women reach finals of East/West golf tourney

By Enterprise staff | From Page: B2Comments are off for this post | Gallery

 
U11s get a win in an eventful weekend of youth football

By Enterprise staff | From Page: B3 | Gallery

A’s support Samardzija in a win over Angels

By The Associated Press | From Page: B8

 
.

Features

.

Business

.

Obituaries

Carol L. Walsh

By Special to The Enterprise | From Page: A4

 
.

Comics

Comics: Tuesday, September 23, 2014 (set 1)

By Creator | From Page: B5

 
Comics: Tuesday, September 23, 2014 (set 2)

By Creator | From Page: B7