HomeMy WebLinkAboutAgenda Report - May 6, 1987 (47)i _ :�.• rlTV pr. 1 . nni
� � � v � �v v � COUNCIL COMMUNICATION
PUBLI,Z WORKS DEPARTMENT
111
City Council
FROM: City Manager
MEETING DATE: May 6, 1987
AGENDA TITLE: Approve Hiring of Consultant for Development of Wastewater
Discharge Requirements for Petroleum Hydrocarbons
RECOMMENDED ACTION: That the City Council authorize the Public Works
Department to retain the firm of Black & Veatch for the development of
petroleum hydrocarbon discharge standards.
BACKGROUND INFORMATION: At the present time, there are a number of
locations within the City's service area Lhat have known groundwater
contamination due to leaky underground fuel tanks. One of the most
economical methods of cleaning up this type of contamination includes the
removal of the groundwater from the immediate area, performing on-site
filtering and clean up, and then discharging into the City's wastewater
system.
The City has been approached by one `irm requesting discharge into the City's
wastewater system and we anticipate L t we will receive additional requests
in the near future. The City should have standards which cover this type of
discharge. The present City Code only vaguely addressee hydrocarbon
discharges which could have a major impact on the City's collection system,
the treatment plant operatior, and the usability of waste sludges.
A Request for Proposal (RFP) was sent to three consulting firms and included
the following three major tasks:
° Recommendation on acceptable limits which would not impact the
collection system (explosive atmosphere), the treatment system
(effects on biochemical process), and the disposal system
(sludge contamination).
° Recommendation on safeguards to ensure limits are not exceeded.
° Recommendation on methods of determining actual flows.
We received proposals from the three firms, all of which met the requirements
of the RFP and all were qualified to do this project. Listed below is a
breakdown of the fees for the proposals submitted:
Black & Veatch $4,500
Environmental Science and Engineering, Inc. $5,442
Environmental Resource Management - West $8,000
APPROVED:
(;WASTEWA/TXTW.02M
. PLILK)UN, liry mana
FILE N0.
April 17, 1987
City Council
May 6, 1987
Page 2
it is recommended that Black & Veatch be retained by the City to do this work
and that the City Council authorize the allocation of $5,000 for this study.
The additional $500 is for minor work which will have to be done by City
personnel which will also be charged to the project.
d
nsko
ks Director
JLR/ma
Enclosure
cc: Water/Wastewater Superintendent
City Attorney
CWASTEWA/TXTW.02M April 17, 1987
BLACK & V E A T C H
ENGINEERS—ARCHITECTS
Hydrocarbon Ordinance
City of Lodi
221 West Pine street
Lodi, CA 95240
Attention: Mr. Fran Forkas
Water/Wastewater Superintendent
Gentlemen:
Ufjo i -1-11
MAR
TEL. (415) 945-5770 (�
-�FF-� DI
3170'- K A�'�Zl` S OE
PLEASANT HILL. CALIFORNIA 9423
MAILING ADDRESS: P.O. BOX 4247
WALNUT CREEK. CALIFORNIA 94596
B&V Project 90245.012
March 13, 1987
In response to your request for proposal dated February 25, 1987, Black 6
Veatch is pleased to submit our proposal for technical assistance with the
formation of City ordinance amendments which would regulate the discharge
of hydrocarboui and petroleum products to the wastewater collection system.
While the City is currently faced with a decision regarding gasoline
contaminated ground water, the scope of ordinance should be broad enough to
encompass all hydrocarbons and petroleum products. Black 5 Veatch has
assisted numerous municipalities and sewerage agencies throughout the
nation with the formation of wastewater ordinances including the City of
Lodi. An example of an applicable industrial waste ordinance for the
Metropolitan St. Louis Sewer District (MSLSD) and an EPA model ordinance
have been attached for your review.
Concerns over the presence of hydrocarbons and petroleum products in waste-
water are well founded and include:
• Public and city employee safety with regards to explosive,
flammable, and/or toxic conditions:
• Costly collection system explosions or fires.
• Compatibility with biological treatment systems.
• Treatability and impacts on receiving waters and reclamation
opportunities.
• Effects on residuals quality and loss of residuals management
opportunities.
BLACK B V EAT .
City of Lodi
Mr. Fran Forkas
2 8&V Project 90245.012
larch 13, 1987
As a result of these concerns most municipalities and sewerage agencies
prohibit the discharge of hydrocarbons and petroleum products when
possible. Such is the case with the City's current prohibition in
Article II, Section 20-3.1.
With certain industrial wastes and in special circumstances, the presence
of hydrocarbons and petroleum products cannot be avoided. In such cases
their discharge must be strictly regulated to ensure that the public, City
employees, and the collection system are protected by prevention of
explosive or toxic conditions within the collection system; and that the
environment is protected by the prevention of waste concentrations that
would have an adverse impact on the treatment plant, receiving waters, and
residuals quality.
Examples of regulations to prevent the occurrence of explosive conditions
within the collection system are contained in Article IV, Section 1, No. 1
of the MSLSD ordinance and in Section 2, No. 2.1-a of the EPA model
ordinance. These ordinances provide restrictions on the levels of combus-
tibles in the sewer atmosphere. Direct incorporation of one of these
examples or modified version into Article II, Section 20.3 of the existing
ordinance would be relatively straightforward.
The problem %ith this type of ordinance is that it does not permit a
critical review of the wastewater prior to discharge. An alternative
approach to the prevention of an explosive condition may be to prohibit the
discharge of the volatile hydrocarbons which could produce an explosive
atmosphere in the sewer environment. Given the complex nature of the sewer
environment and the number of potential hydrocarbons, many simplifying
assumptions would have to be made to determine which hydrocarbons would be
prohibited. Another drawback to this approach is that it may unnecessarily
prohibit the discharge of very dilute wastestreams such as the contaminated
ground water. We propose to meet with the City and fire marshall early on
to determine which approach best meets the requirements of the City.
The current ordinance prohibits the discharge of wastewaters which are a
danger to life or -safety of personnel in Article II, Section 20-3, No. 3.
This regulation should be amended to specifically include the emission of
chemical contaminants into the atmosphere which exceeds threshold limit
values. Such a prohibition is included in Article IV, Section 1, No. 7 of
the Metropolitan St. Louis Sewer District ordinance.
The prohibition of wastes that adversely affect the treatment process and
receiving water quality is currently regulated ander Article II,
Section 20-3, Nos. 6 and 7; and Article II, Section 20-11, No. 9. While
these regulations protect the plant and receiving water, they should be
reviewed and amended to incl,.;de prohibition of wastes that affect
wastewater reclamation.
BLACK @ P E A T
City of Lodi
Mr. Fran Forkas
3 BBV Project 90245.012
March 13, 1987
The ease with which hydrocarbons are degraded in the activated sludge
process depends upon its chemical structure. Aliphatic and simple
compounds in the paraffin and olefin series are readily decomposed,
unsaturated and branched chains of higher molecular weight compounds
require more time and aromatic compounds such as benzene, ethylbenzene,
toluene, and zylein- are the most resistant. In all likelihood, regulations
to prevent the occurrance of explosive conditions in the sewer will limit
the hydrocarbons to concentrations which will not adversely affect the
treatment process or receiving water quality.
The current ordinance does not specifically prohibit the discharge of
wastes that adversely impact the quality of treatment residuals (sludge and
scuti rendering them unsuitable for disposal or reuse. Such a prohibition
should be added. An example of such a restriction is contained in
Section 2, No. 2.1-f of the EPA model. As with the previous regulations,
prohibition does not lend itself to critical review prior to discharge. An
alternative approach would be to imposk- restrictions on the discharge of
those compounds judged most likely to accumulate in the sludge (high
molecular weight and aeromatic hydrocarbons) to levels which would prevent
the contamination of the sludge produced by an equivalent volume of
domestic sewage..:
The City is rightly concerned about safeguards and monitoring of the
discharge. Instrumentation used to detect the relative explosion hazard of
sewer atmospheres consists of standard equipment items similar in nature to
the hazardous gas detector located in the treatment plant headworks. Both
stationary and hand-held units are available, and options would include
alarm points and recorders. We would propose to develop specific atmos-
pheric and wastewater quality monitoring requirements to ensure compliance
with the amended ordinance.
Flow monitoring would depend on the nature of the discharge. For the
proposer contaminated ground water discharge, a stand and displacement or
turbo type water meter would be appropriate.
The scope of services developed for this work is presented in Attachment
lio. 1. We have estimated that the cost of these services and our expenses
would total $4,500. This scope and budget assume that the ordinance
amendments would be generic in nature and similar to the attached examples.
A more definitive ordinance which would set specific limits on hydrocarbon
concentrations could be developed at approximately twice the cost.
CLACK a Y CA i t
City of Lodi 4 BBV Project 90245.012
Mr. Fran Forkas March 13, 1987
We are pleased to have had the opportunity to provide you with our proposal
and look forward to the opportunity to assist the City in this matter.
Should you have any questions or require a-3ditional information, please
feel free to call.
Very truly yours,
KBH:mit
Enclosures
ArTACBY= NO. 1
SCOPE OF SERVICES
PM
PE
SE
Task 1
Review and evaluate ordinances including:
—
6
1
current city ordinance, EPA model ordinance,
and ordinances from solicited municipalities
and agencies.
Task 2
Meet with City and fire marshall to
4
6
--
determine best regulatory strategy.
Task 3
Develop draft of ordinance amendments.
--
12
4
Task 4
Analyze ground water contamination data in
1
4
--
light of effects and fate of hydrocarbon
and petroleum products in the activated
sludge process.
a
Task 5
Develop discharge monitoring and reporting
--
4
--
i
requirements.
Task 6
Prepare letter report' including recom-
4
16
6
i
G
mendations regarding the proposed
contaminated ground water discharge and
s
{
4
amendments to the existing ordinance.
Task 7
Meet with city sraf'_ and council as
4
6
--%
b
necessary to review and enact the
n
y
ordinance amendment.
13
54
11
CITY OF LOLDI) SPECIAL ALLOCATICN REQUEST
° E iflY' 1 3 '87
' • AdanaQPj�S OffirP
TO: Finance Director
City Manager
FROM: Public Works Director
Date: 5/11/87
Account Number: 17.1-4,00.4-(4,-500
Request is made for funds to accomplish the following which was not included in 4 -he
current budget:
PROJECT DESCRIPTION 8 JUSTIFICATION ESTIMATED COST
Retain the firm of Black & Veatch for development of .51000.00
petroleum hydrocarbon discharge standards per Council
action on 5/6/87 ($4,500). Additional $500 covers
possible City lab staff work.
FUND OR ACCOUNT TO BE CHARGE
Current Budget $ Prior Year Reserve $
Contingent Fund $ General Fund Surplus S
Capital Outlay Reserve S Reimbursable Account S
.56AUKe U 7, L 17- Y
Utility Outlay Reserve S Cv ., L OvTL4y Fv" S SOdd
other
APPROVALS _
Ft.nd Verification
W- ll " I a f
F
Submit this form in triplicate.
Approval
7-
City ML1l4onoger //7 date
Co � y�.$�/
eG
Amount Approved S Oa0
CITY COUNCIL THOMAS A. PETERSON
C,ty Manager
EVELYN M. OLSON, Mayor CITY OF L O D I
JOHN R. (Randy) SNIDER R F'ACjf REIMC it
v f �C [ it_jI City Clerk
Mayor Pro Tempore CITY HALL, 221 WEST PINE STREET
DAVID M. HINCHMAN CALL BOX 3006 19PC.� s;ti �+ gpNg1 M�$T W
JAMES W. PINKERTON, Jr. LODI. CALIFORNIA 95241-1910 F �f it `tit-t:it�-Attorney
FRED M. REID (209) 334-5634 ALICE MI. REIMCHE
TELECOPIER:(M)333.67% CITY CLERK
May 8, 1987 CITY OF Lail
Black & Veatch
P.O. Box 4247
Walnut Creek, CA 94596
SUBJECT: Development of Discharge Requirements for Petroleum Hydrocarbons
Enclosed is a purchase order to accomplish the work outlined under your
proposal dated March 13, 1987.
Billing is to be on a time and material basis to the maximum of $4,500.
The billing for this work should be sent to my attention and should
include project name, purchase order number, total amount authorized,
amount previously billed, amount of current billing, and amount remaining
under the contract.
Jack L. Ronsko
Public Works Div -actor
JLR/ma
Enclosure
cc: :ity Clerk_.
Water/Wastewater Superintendent