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ORDINANCE NO. 942 (1982 Series)
AN ORDINANCE OF THE CITY OF SAN LUIS OBISPO
AMENDING MUNICIPAL CODE ARTICLE VII, CHAPTER
5, SECTION 7501, STANDARDS AND REGULATIONS
FOR QUALITY OF SEWER DISCHARGE
BE IT ORDAINED by the Council of the City of San Luis Obispo as follows:
SECTION 1. Section 7501 (Article VII, Chapter 5) of the San Luis Obispo Municipal
Code, Standards and Regulations for Quality of Sewer Discharge, is hereby amended to
read as follows:
"SECTION 7501.
7501.1 Purpose and Scope.
This ordinance sets forth standards and regulations governing discharges
into the Publicly Owned Treatment Works (POTW) for the City of San Luis Obispo. These
standards and regulations enable the City to comply with all applicable State and
Federal laws required by the Clean Water Act of 1977 and the General Pretreatment
Regulations (40 CFR, Part 403).
The objectives of this ordinance are:
(a) to prevent the introduction of pollutants into the POTW which will inter-
fere with the operation of the POTW, including interference with the use or disposal
of municipal sludge;
(b) to prevent the introduction of pollutants into the POTW which will pass
through the system inadequately treated or otherwise be incompatible with the system;
(c) to improve opportunities to recycle and reclaim wastewaters and sludges
from the system.
This ordinance provides for the regulation of direct and indirect contributors
to the POTW through the issuance of permits to Industrial Users, pretreatment and
reporting requirements for permittees, monitoring and enforcement of noncompliance.
7501.2 Storm Water. Storm water and all unpolluted drainage shall be dis-
charged to such sewers as are specifically designated as storm sewers, or to a
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natural outlet approved by the Director of Public Services. Industrial cooling
water or unpolluted process waters may be discharged, upon approval of the
Director of Public Services, to a storm sewer or natural outlet. Appropriate
permits from all affected public agencies may be required by the-City and shall;.
be obtained by the applicant.
7501.3 Discharge quality. Except as hereinafter provided, no person shall
discharge or cause to be discharged any of the following described waters or wastes
to any public sewers:
(a) Any liquid or vapor having a temperature higher than 1500F. into the
sewer and in no case higher than 1040F at introduction into the Wastewater Treatment
Plant.
(b) Any water or waste containing grease as follows:
1. Floatable grease in excess of 25 parts per million. Grease in an
oil,.fat, grease,tor, =other ether - soluble matter. Floatable grease is grease which
rises to the surface of quiescent sewage or waste upon dilution of the sewage
or waste with fresh or salt water.
2. Dispersed grease, other than soap, in excess of 500 parts per million.
Dispersed grease is grease which is not floatable.
(c) Any gasoline, benzene, naptha, fuel oil, or other flammable or explosive
liquid, solid or gas which the POTW has declared a hazard to the system.
(d) Any garbage that has not been.properly shredded.
(e) Any ashes, cinders,.sand, mud, straw, shavings, metal, glass, rags,
feathers, tar, plastics, woods, paunch manure, or.any other solid or viscous;
substance capable of causing obstruction to the flow in sewers or other interference
with the proper operation of the Wastewater Treatment Plant (WWTP).
(f) Any water or wastes having pH lower than 6.0 or higher than 9.0,
or having any other corrosive property capable of causing damage or hazard to
structures, equipment, and personnel of the WWTP.
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Ordinance No. 942 (1982 ries)
(g) Any waters or wastes containing a toxic or poisonous substance in
sufficient quantity to injure or interfere with any sewage treatment process,
constitute a hazard to humans or animals, or create a hazard in the receiving
waters of the WWTP, or to exceed the limitations set forth in the categorical
pretreatment standards.
(h) Any waters or wastes containing suspended solids of such character and
quantity that unusual attention or expense is required to handle such materials at
the WWTP.
(i) Any noxious or malodorous gas or substance which either alone or by inter-
action with other wastes are capable of creating a public nuisance.
(j) Any wastewater containing in excess of:
15.0 mg /l
1.0 mg /l
0.25 mg /l
0.5 mg /l
0.5 mg /1
7.5 mg /1
30.0 mg /l
0.5 mg /1
0.01 mg /1:,
0.1 mg /1'.,
3.0 mg /1:_
2.0 mg /l.
1.0 mg /1
30.0 mg /1
300.0 mg /l
7.5 mg /1
aluminium
arsenic
Eadmium
copper
chromium
- flouride
iron
.lead
;mercury.
selenium .�:':
M.-B.A:.S. (foaming agent)
.phenol
ammonia
sulfate
boron
Any wastewater, other than water- softening regeneration brine, containing
in excess of:
1600 mg /1 total dissolved solids
300 mg /l sodium
300 mg /l chloride
(k) Plants discharging water - softening brine shall not be restricted in the
concentrations of total dissolved solids, sodium, or chloride of the wastewater
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Ordinance No. 942 (1982 ries)
discharged. However, such plants shall make all reasonable efforts (such as brine
reclamation and use of minimum effective quantities of sale for regenerating portable ex-
change units) to minimize the discharge of these substances. A maximum of 12 lbs.
net of sodium chloride per cubic foot of portable exchange water softener units
regenerated shall not be exceeded. Such plants shall maintain records of monthly
sodium chloride usage and monthly volume of portable exchange units regenerated
and shall make these records available to the City for review upon request.
(Ordinance No. 721 1977)
Notwithstanding the immediately preceding paragraph, if the supervisor of
the WWTP determines that such a plant or plants are interfering with the
operation of the WWTP or causing the MWTP to-violate its NPDES permit, such plants
shall comply with any orders of`the supervisor designated to eliminate the
interference or to stop the violation of the NPDES permit.
(1) The admission into the public sewers of any water or wastes having (1) a
5 -day Biochemical Oxygen Demand greater than 300 parts per million by weight, or
(2) containing more than 350 parts per million by weight of suspended solids, or
(3) containing-any quantity of substances having the characteristics described in
Section 7501.2, or.(4) having an average daily flow greater than 2 percent of the
average daily sewage flow shall be subject to the review and approval of the
Director of Public Services.
(m) Any waters or wastes with an objectionable color not removed in the treatment
process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(n) Any waters or wastes containing any radioactive wastes or isotopes of
halflife or concentrations that exceed limits established by the supervisor of
the WWTP.
(o) Any substance which will cause the WWRP effluent and by- products, such
as sludge, to be unsuitable for reclamation and reuse.. In no case shall a substance
discharged to the 14WTP cause the plant to be in violation of sludge use or disposal
guidelines and regulations.
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(p) Any substance which will cause the POTW to violate its NPDES permit.
When the supervisor of the WWTP determines that a user is contributing
any of the hbove- mentioned substances in such amounts as to interfere with the
operation of the WWTP, the supervisor shall:
(1) advise the user of the impact of the contribution on the WWTP;
(2) develop effluent limitations for the user to correct,
(3) place limits on rate and time of discharge or requirements for flow
regulations and equalization, or
(4) take any other action necessary to eliminate the interference.
7501.4 Federal Categorical Pretreatment Standards.
Upon the promulgation of the federal categorical pretreatment standards for
a particular industrial subcategory, the federal standard shall apply in any instance
where its limitations are more stringent than those in this Section.
7501.5 Effluent limitations promulgated by the Federal Water Pollution
Control Act.
Effluent limitations promulgated by the Federal Water Pollution Control Act
PL 92 -500, shall apply in any instance where they are more stringent than those in
this Section. Under Section 307(b) of the Act, Federal pretreatment standards are
designed to achieve two purposes: (1) to protect the operation of publicly owned
treatment works, and (2) to prevent the discharge of pollutants which pass through
such works inadequately treated. Users in industrial categories subject to effluent
guidelines issued under Section 304(b) of the Act, which are discharging incompatible
pollutants to public owned treatment works, are required to adopt best practical
control technology currently available, as defined by the Administrator pursuant to
Section 304(b) of the Act. For some industrial categories it may be necessary to
define pretreatment guidelines for problems that may arise as a result of the
discharge into publicly owned treatment works. However, any adjustments required
for particular industrial categories should be considered in connection with the
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Ordinance No. 942 (1982 "eries)
City's requirements rather than in the national pretreatment standard. Limitations
on wastewater strength in this Chapter may be supplemental with more stringent
limitations if:
1. the City determines that the limitations in Section 7501.3 may not be
sufficient to protect the operation of the City's treatment works, or
2. the City determines that the limitations in Section 7501.3 may not be
sufficient to enable the City:'si. treatment works to comply with water quality
standards or.effluent.. limitations specified in the City's National Pollutant
Discharge Elimination System (NPDES) permit.
7501.6 Grease, oil and sand interceptors.
Grease, oil and sand interceptors shall be provided when in the opinion of
the Director of Public Services, they are necessary for the proper handling of
liquid wastes containing grease in excessive amounts, or any flammable wastes, sand
and other harmful ingredients; except that such interceptors shall not be required
for private living quarters or dwelling units. All interceptors shall be of a
type and capacity approved by the Director of Public Services, and shall bE- located
as to be readily and easily accessible for cleaning and inspection. Grease and
oil interceptors shall be constructed of impervious materials capable of withstanding
abrupt and extreme changes in temperature. They shall be of substantial construction,
watertight, and equipped with easily removable covers which, when bolted in place,
shall be gas -tight and water - tight. Where installed all grease, oil and sand
interceptors shall be maintained by the owner, at his expense, in continuously
efficient operation at all times.
7501.7 Pretreatment Facilities.
Where pretreatment of discharge is required by the supervisor of the WWTP,
the necessary facilities shall be provided, operated, and :maintained at 'the user's
expense. Detailed plans showing the facilities and their operating procedures
shall be submitted to the City for review. Such plans must be acceptable to the
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Ordinance No. 942 (19K series)
City before construction is begun. Any changes in the pretreatment facilities
or method of operation must be reported to and approved of by the City prior to
implementation of the proposed changes.
7501.8 Control Manhole.
When required by the Director of Public Services, the owner of any property
served by a building sewer carrying industrial wastes shall install a suitable
control manhole in the building sewer to facilitate observation, sampling and
measurement of the wastes. Such manhole, when required, shall be accessible and
safely located, and shall be constructed in accordance with plans approved by
the Director of Public Services. The manhole shall be installed by the owner at
his expense and shall be maintained by him so as to be safe and accessible at all
times.
7501.9 Measurements and tests.
All measurements and tests and analyses of the characteristics of waters and
wastes shall be determined in accordance with "Standard Methods for the Examination
of Water and Sewage," and shall be determined at the control manhole or upon suitable
samples taken at said control manhole. In the event that no special manhole has
been required, the control manhole shall be considered to be the nearest downstream
manhole in the public sewer to the point at which the building sewer is connected.
The cost of any program of regular testing required by the Director of Public Services
shall be billed directly to the industry or business involved.
7501.10 Special agreement.
No statement contained in this article shall be construed as preventing any
special agreement or arrangement between the City of San Luis Obispo and any
industrial concern whereby an industrial waste or unusual strength or character
may be accepted by the City for treatment, subject to payment therefore by the
industrial concern of all City costs conncected with such extra treatment; provided,
no State or Federal Pretreatment Standards shall be exceecbd- by. the discharge of 'such
industrial waste.
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Ordinance No. 942 (1982 ies)
7510.11 Drainage below curb and also below main sewer level.
(a) Drainage piping serving fixtures, the flood level rims of which are
located below.the elevation of the curb or property line, at the point where the
building sewer crosses under the curb or property line, and above the crown level
of the main sewer, shall drain by gravity into the main sewer, and shall be protected
from back flow of sewage by installing an approved type backwater valve, and each such
backwater valve shall be installed only in that branch or section of the drainage
system which receives the discharge from fixtures located below the elevation of
the curb or property line. If the drainage piping is lower than the next upstream
manhole, the property owner may be required to install a backwater valve.
(b) Director of Public Services empowered to stop overflow.
If the property owner fails to install and maintain a backwater trap or
backwater valve in good working condition, when required under this Section, the
Director of Public Services may order and require said plumbing fixture to be
disconnected and removed and the outlet plugged or capped. In the event that
the property owner fails to disconnect and plu:or cap the sewer connection within
ten (10) days after written notice by the Director of Public Services, then the
Director of Public Services shall arrange for such disconnection and capping; the
cost of which shall be a debt of the property owner and which may be collected
by court action or may be declared to be:a lien by action of the City Council after
public hearing and notice to the property owner and shall be added to and collected
as part of the tax roll.
(c) Alternate right to terminate water service. As an alternate to the
procedure set forth above, if the property owner fails to install and maintain a
backwater trap or backwater valve in good working condition when requested under
this part,,the. Director of Public Services may order and require termination of
water service to the parcel and all structures connected to the sewer outlet subject
to overflow. Said water service shall not be reinstated until the maintenance or
installation of the backwater trap or backwater valve has been approved by the Director
of Public Services.
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Ofdianance No. 942(1982 (- 'ies)
(d) Maintenance of House Connection Sewers. All house connection sewers,
industrial sewers, private sewage disposal systems and appurtenances thereto, now
existing or hereafter constructed, shall be maintained by the owner of the property
in a safe and sanitary condition and all devices or safeguards which are required
by -the section fort-he operation 'thereof, shall be maintained in a good working order.
7501.12 Powers and authority of Inspectors.
(a) Inspection of Premises. The Director of Public Services, the Health
Officer, or other duly authorized employees or representatives of the City or the
Health Department bearing proper credentials and identification shall be permitted
to enter all properties for the purposes of inspection, observation, measurement,
sampling and testing in accordance with the provisions of this ordinance. The
Director of Public Services, the Health Officer, or their representatives shall have
no authority to inquire into any processes including metallurgical, chemical,
oil, refining, ceramic, paper, or other industries beyond that point having a
direct bearing on the kind and source of discharge to the sewers or waterways or
facilities for waste treatment.
(b) Time and Cost of Inspection. Inspections shall take place during the
normal working hours of the Director of Public Services, the Health Officer, or
other duly authorized employees or representatives of the City or Health Department, Each
discharger shall pay a reasonable inspection fee sufficient to cover the costs of the
inspection. Any discharger of non - domestic wastewater who requires an inspection
other than during normal business hours set forth above shall pay any additional
costs attributable to such inspection, including overtime payable to the inspector.
(c) Inspection Schedules. Authorized inspectors shall be permitted to enter
and inspect industrial users pXemises for wastewater discharge and treatment facilities
pursuant to a schedule established by the City or set forth in the wastewater
treatment discharge permit. Inspection schedules will be based upon the potential
hazardous discharge of each industrial user of the POTW. Users with high potential
for discharge of hazardous pollutants will be inspected at shorter time intervals
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Ordinance No. 942 (1982 ies)
than those users with less potential discharge hazard. Discharge permits may
contain inspection schedules and /or conditions. If the City discovers significant
pollutants in the pOTW) inspections shall be permitted, as needed, on an emergency
basis, in addition to regularly scheduled inspections.
,_:.(d) Liability for Injury. While performing the necessary work on private
properties referred to in "a" above, authorized employees, and the City shall
indemnify the company against loss or damage to its property by such employees and
against liability claims and demands for personal injury or property damage asserted
against the company and growing out of the gauging and sampling operation, except
as such may be caused by negligence or failure of the company to maintain safe
conditions as required in this ordinance.
(e) Rights of City Entry. The Director of Public Services, the Health
Gfficer, and other duly authorized employees of the City or Health Department
bearing proper credentials and identification shall be permitted to enter all
private properties through which the City holds a duly negotiated easement for the
purposes of, but not limited to, inspection, observation, measurement, sampling,
repair, and maintenance of any portion of the sewage works lying within said easement.
All entry and subsequent work, if any, on said easement shall be done in full
accordance with the terms of the duly negotiated easement pertaining to the private
property involved.
7501.13 Permits and Users Survey.
All dischargers of non - domestic wastewater to the city sewer system shall obtain
a wastewater discharge permit and shall complete an Industrial User's Survey. Lt
shall be unlawful to discharge non - domestic wastewater without a permit, or to fail
to complete an Industrial User's Survey.
1. Permit Conditions:
Wastewater discharge permits shall be expressly subject to all provisions
of this Ordinance and all other regulations, user charges and fees established by
the City. The conditions of wastewater discharge permits shall be uniformly enforced
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,Ordinance No. 942 (1982 ies)
by the Director of Public Services in accordance with this Ordinance, and applicable
State and Federal Regulations. Permit requirements may include, but not be limited to
the following:
(a) the unit charge or schedule of user charges and fees for wastewater
to be discharged to a community sewer;
(b) the average and maximum wastewater constituents and characteristics;
(c) limits on rate and time of discharge or requirements for flow
regulations and equalization;
(d) requirements for installation of inspection and sampling facilities;
(e) pretreatment requirements;
(f) specifications for monitoring programs which may include sampling
locations, frequency and method of sampling, number, types and standards for tests
and reporting schedule;
(g) requirements for submission of technical reports or discharge reports;
(h) requirements for maintaining plant records relating to wastewater
discharge as specified by the City, and affording-Department of Public Services
access thereto;
(i) mean and maximum mass emission rates, or other appropriate limits
when incompatible pollutants (as defined by City Ordinance) are proposed or present
in the user's wastewater discharge;
(j) requirements for submission to inspections;
(k) other conditions as deemed appropriate by the City to insure compliance
with this Ordinance.
2. Duration of Permits:
..Permits shall be issued for a specified time period, not to exceed five (5),.
years. A permit may be issued for a period of less than one year or may be stated to
expire on a specific date. If the user is not notified by the City 30 days prior to
the expiration of the permit, the permit shall be extended one additional year.
The terms and conditions of the permit may be subject to modification and change by
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:.Ordinance No. 942 (198' cries)
the City during the life of the permit as limitations or requirements as identified
in Municipal Code Section 7500 -7507 are modified and changed. The user shall be informed
of any proposed changes in his permit at least 30 days prior to the effective date
of change. Any changes or new conditions in the permit shall.include a reasonable time
schedule for compliance.
3. Transfer of a Permit.
Wastewater Discharge Permits are issued to a specific user for a specific
operation. A Wastewater Discharge Permit shall not be reassigned or transferred or
sold to a new owner, new user, different premises, or a new or changed operation.
Provided that if in the opinion of the Director of Public Services the sale or
transfer of an operation does not result in a change in use, the permit may be
reassigned.
4. Revocation of Permit:
Any user who.violatesany of the following conditions of the permit, or
of this Ordinance, or of applicable State and Federal regulations, is subject to
permit revocation:
(a) failure to factually report the wastewater constituents and character-
istics_of :discharge;
(b) failure to report significant changes in operations or wastewater
constituents and characteristics;
(c) refusal of reasonable access to the user's premises for the purpose
of inspection or monitoring;
(d) failure to provide official evidence of proper disposal of non - domestic
wastes not permitted by City Ordinances (hazardous and toxic wastes).
7501.14 Reporting Requirements for Permittees
(a) Any user subject to pretreatment standards and requirements shall submit
a report indicating the nature, concentration, and daily flows of all limiting
pollutants to the supervisor of the WWTP. The report shall also state whether the
applicable pretreatment standards and requirements are being consistently met and,
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„,,Ordinance No. 942 (1982 ies)
if not, set forth a schedule of compliance for the installation of technology or
changes in character of the discharge.
(b) After meeting the above requirements, the user shall submit self
monitoring reports, as required by the supervisor of the WWTP, to assess and assure
continued compliance with pretreatment standards and requirements, including but not
limited to the reports required in 40 CFR 403.12. These reports shall contain
the results of sampling and analysis of the discharge, done in accordance with the
procedures approved by the POTW.
7501.15 Confidentiality /Public Disclosure.
(a) Any information submitted to EPA may be claimed as confidential by
the submitted. Any such claim must be asserted at the time of submission in the
proper. manner. If no claim is made at the time of submission, EPA may make the
information available to the public without further notice.
(b) Effluent data shall be available to the public without restriction.
(c) Notification of continuing violations will be published at least once
every 12 months in the major local newspaper.'
./7501.16 Definitions
Industrial User - A person who discharges non - domestic wastewater into the
City sewer system.
Industrial User's Survey - a questionnaire (and related process) used by the
City to identify and categorize Industrial Users and the
characteristics of their wastewater discharge.
Non- domestic Wastewater - wastewater discharge other °_than normal,•discharge
from household facilities and appliances.
Publicly -Owned Treatment Works- (POTW)- • City `-owned� sewer- ,-system, including sewer
pipes within the City that convey wastewater to treatment plant,
treatment plant, sewer pipes that convey wastewater to the
treatment plant from persons outside the City who contract with
the City to use the sewer system, and related facilities.
Wastewater Treatment Plant - City -owned and operated sewage treatment plant.”
/won/
NO
Ordinance No. 942 "=982 Series)
_J
SECTION 2. A sammary.of_�this ordinance, approved by the City Attorney,
together with the ayes and noes, shall be published at least three (3) days
prior to its final passage in the Telegram- Tribune, a newspaper published and
circulated in said City, and the same shall go into effect at,..the_'expiration
of thirty (30) days after its said final passage. A copy of the full text
of this ordinance shall be on file in the office of the City Clerk on and
after the date following introduction and passage to print and shall be
available to any interested member of the public.
INTRODUCED AND PASSED TO PRINT by the Council of the City of San Luis
Obispo at a meeting held on the 7th day of December , 1982, on motion of
Councilman Settle seconded by Councilman Griffin
and on the following roll call vote:
AYES: Councilmembers Settle, Griffin, Dovey, Dunin and Mayor Billig
NOES: None
ABSENT: None
c
YO ELANIE C. BILLIG
ATTEST:
CITY LERK PAMELA V GES
Approved:
S
City Administrative Offv cer`
nAd_�
City Attorney
�o
Director of Public Works
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ORDINANCE NO. 942
(1982 Series)
FINALLY PASSED this 14th day of December ,
1982, on motion of Councilwoman Dovey seconded by
Councilman Settle , and on the following roll call
vote:
AYES: Councilmembers Dovey, Settle, Dunin, Griffin and Mayor Billig
NOES: None
ABSENT: None
k
Vayo Me anie C. Billig
ATTEST:
r
City,Clerk Pamela Vo s
,
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