HomeMy WebLinkAbout2343 Wastewater Disposal and TreatmentORDINANCE NO.
AN ORDINANCE RELATED TO WASTEWATER DISPOSAL AND
TREATMENT CREATING A NEW CItAPTER 13.06 ESTABLISHING A
CLASSIFICATION AND FEEING SYSTEM FOR CERTAIN
COMMERCIAL, INDUSTRIAL AND GOVERNMENTAL GENERATORS
OF WASTEWATER AND ESTABLISItING A SPECIAL COMMODITY
CHARGE FOR THE GENERATION OF ltIGH STRENGTIt WASTE WITH
HIGH VARIABILITY IN LOADINGS BY USERS SUCH AS THE
WASHINGTON STATE FERRY SYSTEM
WHEREAS, the City of Port Townsend is in the process of financing and constructing
facilities for the treatment of wastewater through secondary treatment processes under State and
Federal mandates; and
WHEREAS, secondary treatment is a process that is sensitive to solids and organic
loadings; and
WHEREAS, certain commercial, industrial and governmental operations generate waste
strengths that are greater than average for household wastes; and
WHEREAS, it costs the City more to treat wastes that are greater in strength than
average household wastes; and
WHEREAS, the City desires to establish a system to be able to charge such commercial
and industrial establishments their fair share of the costs of treatment; now therefore
THE CITY COUNCIL OF THE CITY OF PORT TOWNSEND, IN REGULAR
SESSION ASSEMBLED, DO ORDAIN AS FOLLOWS:
Section 1. A new Chapter 13.06 of the Port Townsend Municipal Code is hereby
established to read as follows:
CLASSIFICATION AND COMMODITY CHARGES FOR GENERATORS OF
HIGH STRENGTH WASTEWATER
13.06.010 Purpose. The purpose of this Chapter is to establish special wastewater rates
for users of the City's sewer system which generate certain high strength wastes or have high
variability in waste loadings. It is intended that such special rates will provide a system of
charges which equitably reflect the costs to the City of treating such wastes.
13.06.020 Definition of Terms. For the purposes of this Ordinance, the following
words and phrases shall have the following meanings:
a. City shall mean the City of Port Townsend.
b. The facility shall mean the facility discharging to the City system.
e. Biochemical Oxygen Demand (BOD) shall mean the amount of oxygen
utilized in the biochemical oxidation of organic matter as measured in accordance with
the appropriate procedure contained in Standard Methods and is expressed in milligrams
per liter (mg/1).
d. Deleterious Wastes shall mean wastes that are or may be corrosive or
harmful to the wastewater treatment plant, pump stations, transmission lines, and/or plant
effluent or sludge, or which may violate City, State, or federal standards.
e. May shall-be permission, Shall be mandatory.
f. Suspended Solids (SS) shall mean the residue from wastewater which
remains after filtration in accordance with the appropriate procedures contained in
standard methods.
g. Pretreatment is the reduction of Biochemical Oxygen Demand (BOD),
Total Suspended Solids (TSS), Fat, Oil and Grease (FOG), and Hydrogen-ion
concentrations (pi-I), using screening, chemicals, equalization tanks, and other applicable
methods and procedures.
h. Average Daily Flow is the total monthly flow divided by the days of
operation.
13.06.030 Standard Industrial Code Classifications.
activities shall be assigned Standard Industrial Code classifications as indicated below:
BUSINESS ACTIVITY GROUP CLASSI~CATION
Restaurants/Taverns full service
Fast Food
Pre-packaged Servers
Supermarkets
with Deli, Bakery, etc.
without Deli, Bakery, etc.
Convenience Stores
The folloWing types of business
~ SIC ~
......................... SIC #3
......................... SIC #1
......................... SIC g4~
........................ . SIC #1
......................... SIC#1
2:~qz
Canneries (Food Processors)
Convalescent Homes
Washington State Ferries
SIC = Standard Industrial Code.
......................... SIC #4
......................... SIC g4~ $
......................... SIC/$4 ~
......................... SIC #4
Each commercial and industrial account shall be assigned to
a SIC by the Director of Public Works based on a review of the wastewater discharges from
each account.
19,06,040 Commodity_ Charge. A commodity charge shall be based on water use and
wastewater strength. Charges shall be on a block rate, with the block rate increasing based on
strength of the waste, as follows:
COMMODITY CHARGE $/1000 GALLONS
SIC #1 < 300 MG/L BOD OR TSS $2.08
SIC//2 301 - 500 MG/L BOD OR TSS $2.08
SIC #3 501 - 700 MG/L BOD OR TSS or $2.08
SIC #4 > 700 MG/L BOD or TSS or
Variability in Loadings *
$0.88 PER 1000 GALLONS,
PLUS
$0.98/LB BOD, PLUS
$0.62/LB TSS
* Such as Washington State Ferries or other users with instantaneous discharges or other use that
muses wide swings in either wastewater quantity or strength that may cause collection or
interceptor sewer concerns or potential adverse impacts on the wastewater treatment plant
process.
Water may be measured at the customer's water meter, or by installation of a sewage
meter to be owned by the City. The City shall have installed and shall insure that a sewage
meter is maintained, the costs of both of which shall be paid by the customer. These
commodity charges shall be in lieu of the commodity charges for commercial uses otherwise
provided for in Chapter 13.04, except for SIC #4 users, which shall pay the commodity charge
under Chapter 13.04 and the charges provided for hereinabove
13.06.050 Introduction of Certain Substances Prohibited. Notwithstanding any other
provisions herein, no facility shall be allowed to deposit any salt water toxic, potentially
hazardous, or other material that may cause or inhibit the normal metabolic function of an
aerobic biological waste treatment system, or which may be limiting, or in any way harmful to
plant personnel.
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13,06,060 Special Rates Established by Contract. Nothing in this Ordinance shall
constrain or impair the City's ability to establish special rates for selected customers through
separate contracts or agreements. Further, nothing in this Ordinance shall affect a pre-existing
rate agreement between a customer and the City for the term of such Agreement(s).
13,06,070 Alternate Approach tO Determination of Rates. Any Sewer Customer who
believes they have been assigned a Standard Industrial Code Classification which is not
appropriate may choose to determine their sewer rate as follows and shall pay the City a monthly
fee based upon the actual use of the City wastewater treatment plant as measured by parameters
which shall be determined in accordance with the following procedures:
a. Metering: The wastewater flow into the sewerage system will be metered
at the point where the facility discharges wastewater into the City system. (The cost of
installation and maintenance of the meter shall be paid by the facility.) The flow
metering installation at the facility shall be calibrated quarterly and equipped with a
totalizer. Daily maintenance by the facility shall include at least a check of the primary
element of the flow-meter for obstructions and visual check of all other elements of the
installation for normal operation. A daily log shall be kept by the facility in which all
maintenance operations performed and any abnormalities observed shall be noted. The
totalizer reading shall also be recorded daily in the log. At the end of each month, the
average daily flow during the month shall be determined by using all the valid data
collected during the month (Total flow divided by days of operation).
b. BOD and Suspended Solids: The monitoring facility shall be equipped
with an automatic liquid sampling device which shall be integrated with the flow-
metering installation in such a manner that wastewater samples can be collected on a
flow-weighted basis and stored. A composite sample shall be prepared weekly, as
directed by the City, from all samples collected during a uniform 24-hour period. The
BOD and SS of each sample shall be determined and recorded in the log. At the end of
each month, the average BOD and TSS during the month shall be determined by using
all the valid data collected during the month. After a period of one year, the City may
reduce the frequency of monitoring (provided there are no other constraints such as a
Department of Ecology permit precluding less frequent monitoring).
c. The facility shall maintain records of all information resulting from any
monitoring activities. Such records for all samples shall include:
3.
4.
5.
6.
The date, exact place, method and time of sampling.
The names of persons taking the sample.
The date the analysis was done.
The names of persons doing the analysis.
The analytical techniques used.
The results of the analysis.
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d. The data collected shall be used by the City to calculate the share of the
total Maintenance and Operation Expenses which shall be charged to the facility. The
method of calculation of Maintenance and Operation Expenses to be charged shall be as
follows:
1. CN - cost factor x monthly plant O&M cost.
2. Cost Factor- (Vf/Vc) (0.2 + 0.4 BODf/BODc + 0.4 TSSf/TSSc).
3. Vf = Average daily wastewater flow of the facility during billing
period (gallons).
4. Cf -- O&M charge to the facility during billing period.
5. f = The facility.
6. c = City of Port Townsend wastewater treatment plant.
7. Vc = Average daily wastewater flow for the City of Port
Townsend wastewater treatment plant during billing period (gallons).
8. BODf = Average daily five-day BOD concentration of wastewater
from the facility during billing period.
9. BODe = Average daily five-day BOD concentration of total plant
wastewater during billing period.
10. TSSf = Average daily TSS concentration of wastewater from the
facility during billing period.
11. TSSc = Average daily TSS concentration of wastewater of total
plant during billing period.
e. Additional charges: Lab Testing: One set of BOD, FOG, TSS, VSS, and
pH tests will be required on a composite sample collected by the City representative on
a weekly basis while the facility discharges to the City sewerage system. Fee for the
required tests will be paid by the facility at the following set rate:
Name of Test Price ~r Test
BOD $20.00
Fat, Oil, & Grease (FOG) 20.00
TSS 10.00
VSS 10.00
pH 1.00
f. Operation. The City shall have free access to the facility and the records
of operation and maintenance. The records of operation and maintenance shall be kept
at the facility and shall be made available to the City during the site visit by the City.
The City shall have access to the facility at reasonable hours without prior notice.
Section 3. This ordinance shall become effective sixty days after its passage and publication.
Read for the first, second and third times~ by the City Council of the City of
Port Townsend, Washington, at a regular mee~ifFg thereof}~eld~is 4th. day of January, 1993.
q~-M. Clise, Mayor
Approved as to form:
Attest:
David A. Grove, Clerk/Treasurer
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