HomeMy WebLinkAbout06/06/1989, C-13 - GRANULATED ACTIVATED CARBON TREATMENT TO REMOVE TETRACHLOROETHYLENE FROM THE AUTO PARK GROUNDWATER Fl/E
MEMG� � °"SII city of san Luis oBi spo June 6, 19
June 6, 1989
COUNCIL AGENDA REPORT M�
FROM: William T. Hetland Prepared by: Allen Short 4S:2
Utilities Director Water Division Manager �J
SUBJECT: Granulated Activated Carbon treatment to remove Tetrachloroethylene from
the Auto Park groundwater basin.
RECOMMENDATION:
Adopt resolution authorizing City Administrative Officer to enter
into a contract for the treatment and removal of Tetrachloroethylene .
from the Auto Parkway groundwater basin, in an amount not to exceed
$2 Alm 00 . 00 .
BACKGROUND:
The City of San Luis Obispo relied primarily on groundwater until the early 1940's when
the Salinas Reservoir was developed. In the 1960's Whale Rock Reservoir was added to the
City supply. The surface supplies were preferred because of aesthetic reasons.
The City as it began reaching the maximum yields of its reservoir supplies, once again
began to look at groundwater as an additional water source. The firm of John L. Wallace
and Associates, in conjunction with Timothy Cleath, Hydrologist, was retained to perform a
groundwater study in December of 1987. The report reviewed historical groundwater data
and identified a test drilling program. As a result of the report provided by John L.
Wallace, a two phase approach to the well development project was developed. The Phase
One contract consisted of well locations as follows:
1. Pacific Beach School
2. Fire Station No. 2
3. Mitchell Park
4. Reservoir Canyon
In light of the City's current water situation and the long time it traditionally takes to
implement a project, staff proposed and Council adopted on the March 14, 1989, amendment
to the original contract to retain and expedite Phase Two of the City's well development
program. Phase Two consists of seven locations one of which is located at the Auto
Parkway circle.
Once the well site is identified it is drilled, cased and gravel packed. It is then
sampled to determine water quality make up and compliance with the the State of California
Health Services maximum contaminate levels. The analysis for the Auto Parkway well has
been verbally presented to staff. The well exhibits levels of Tetrachloroethylene (PCE)
above the Maximum Contaminant Level of 5.0 Ug/L established by the State. The level
reported by the laboratory is 13 Ug/L. As a result, the well will require treatment prior
to delivery into the distribution system.
Based upon the careful review by staff during.the Dalido project, staff is recommending
that Calgon be awarded the contract to provide the City with a second carbon filtration
system at a cost of $189,000, excluding tax, with the same conditions and specifications
which were outlined for the Dalidio Well.
JUN 2 �a g: 30 v7,i .
city of San IUIS OBISPO
COUNCIL AGENDA REPORT
Page 2.
CONSEQUENCES OF NOT TAKING ACTION
If treatment and removal of PCE isnot provided-
1.
rovided1. The City would not be in compliance with the State and Federal Water Quality
Regulations.
2. The State would not grant the City an operations permit and we would not be
able to use the water from the Auto Park Well for domestic consumption.
FINANCIAL IMP CT.
There are adequate funds in the water fund to cover this project. This expenditure
of $189,000 may require an evaluation of priorities for new CIP projects and
projects which have been approved but not completed. Those projects with a low
priority will be eliminated and the money will then be used to fund this project.
RECOMMENDATION:
Authorize the City Administrative Officer to enter into a contract for the treatment
and removal of Tetrachloroethylene from the Auto Parkway groundwater basin, in an
amount not to exceed $250,000.
i
APPROVED:
City Administrative Offic
I
9ce Director
Utility Director
td-U>LL�I
Water Division Manager I
RESOLUTION NO. (1989 SERIES)
A RESOLUTION OF THE COUNCIL OF THE
CITY OF SAN LUIS OBISPO AUTHORIZING THE
CITY ADMINISTRATIVE OFFICER TO ENTER INTO A CONTRACT
FOR TREATMENT TO REMOVE_ TETRACHLOROETHYLENE
FROM THE AUTO PARKWAY GROUNDWATER BASIN
WHEREAS, the City of San Luis Obispo is in the process of
developing additional groundwater water supplies; and
WHEREAS, the laboratory analysis have found levels of
tetrachloroethylene above the State maximum contaminate levels; and
WHEREAS, tetrachloroethylene is classified as a know or
probable human carcinogen by the Environmental Protection Agency
(EPA) ; and
WHEREAS, the technology exist to effectively remove
tetrachloroethylene from contaminated water;
NOW, THEREFORE, BE IT RESOLVED that the Council authorizes
the City Administrative Officer to enter into a contract for the
treatment and removal of Tetrachloroethylene from the Auto Parkway
groundwater basin, in an amount not to exceed $250, 000.
On motion of seconded by
and on the following roll call vote:
AYES:
NOES:.
ABSENT:
the following resolution was passed this day of
1989.
MAYOR RON DUNIN
ATTEST:
CITY CLERK PAMELA VOGES
2 -
Resolution No. Series
Approved:
City Administrative Officer
City A r y
Finan a Director
Utilities Director
4L/ A
Water Division Manager
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