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Chapter 50 — SEWERS

§ 50.036 ADDITIONAL PRETREATMENT MEASURES.

Eureka Zoning Code · 2026-06 edition · updated 2026-07-25 · Eureka

(A) Whenever deemed necessary, the City Manager may require industrial users to restrict their discharge during peak flow periods, designate that certain wastewater be discharged only into specific sewers, relocate and/or consolidate points of discharge, separate sewage waste streams from industrial wastestreams, and such other conditions as may be necessary to protect the POTW and determine the industrial user’s compliance with the requirements of this chapter.

(B) Each person discharging into the POTW greater than 100,000 gallons per day shall install and maintain, on his property and at his expense, a suitable storage and flow control facility to ensure equalization of flow over a 24-hour period.

(C) Clarifiers shall be provided when, in the opinion of the City Manager, they are necessary for the proper handling of wastewater containing excessive amounts of petroleum oil, non-biodegradable cutting oil, products of mineral oil origin or sand; except that such clarifiers shall not be required for residential users. All clarifiers shall be of type and capacity approved by the City Manager and shall be so located to be easily accessible for cleaning and inspection. Such clarifiers shall be inspected, cleaned, and repaired regularly, as needed, by the owner at his sole expense.

(D) Industrial users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.

(E) At no time shall any reading on a properly calibrated combustible gas detector at the point of discharge into the POTW, or at any point in the POTW, be more than 20% of the lower explosive limit (LEL) of the meter.

(F) Grease interceptors shall be provided when, in the opinion of the City Manager, they are necessary for the proper handling of wastewater containing excessive amounts of fats, oils and grease that may cause or contribute to lateral or sanitary sewer overflows; except that such grease interceptors shall not be required for residential users. All grease interceptors shall be of type and capacity approved by the City Manager and shall be so located to be easily accessible for cleaning and inspection. Grease interceptors shall be installed in accordance with the provisions of this chapter. Such grease interceptors shall be inspected, cleaned, and repaired regularly, as needed, by the owner at his sole expense.

(1) Users that are required to have a grease interceptor may be required to connect the following fixtures to the grease interceptor, if they are present:

  • (a) Pot sinks or similar devices, including all compartments of a three compartment sink;

  • (b) Pre-rinse sinks or similar devices;

  • (c) Prep sinks or similar devices;

  • (d) Soup kettles or similar devices;

  • (e) Wok stations or similar devices;

  • (f) Drains in areas where floor mats are washed;

  • (g) Any other fixtures or drains that have a reasonable potential to allow fats, oils and grease to be discharged to the POTW.

(2) Users with food waste disposal units shall connect the unit to a grease interceptor with a minimum capacity of 1,000 gallons or remove the unit.

(3) Users with dishwashers and mop sinks shall connect them directly to the POTW or to a grease interceptor with a minimum capacity of 750 gallons.

(4) Accumulated grease and sediment shall be removed as necessary to prevent lateral or sanitary sewer overflows. At a minimum, single-chamber grease interceptors shall be cleaned in accordance with the manufacturer’s specifications, or when the combined depth of sediment and grease equals or exceeds 25% of the total depth of the sediment, water, and grease. Multiplechamber grease interceptors shall be cleaned in accordance with the manufacturer’s specifications, or when the combined depth of sediment and grease in the final chamber equals or exceeds 25% of the total depth of the sediment, water, and grease in that chamber.

(5) Grease interceptors shall be kept free of non-food waste including, but not limited to grit, rocks, gravel, eating utensils, cigarettes, trash, towels, and rags.

(6) The addition of chemicals, enzymes, emulsifiers, live bacteria or other grease cutters or additives used for purposes of grease reduction in the grease interceptor is prohibited.

(7) If the City Manager determines that a grease interceptor is not being adequately maintained, a correction notice may be issued requiring the deficiency be corrected within seven, 14, or 30 days. Maintenance programs, including BMPs and defined cleaning frequencies, may be mandated. Users that fail to adhere to a maintenance program may be required to install additional pretreatment devices.

(‘63 Code, § 5-5.302) (Ord. 571-C.S., passed 6-2-94; Am. Ord. 775-C.S., passed 12-20-11) Penalty, see § 50.999

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▸ Contents — Eureka Zoning Code
Eureka Zoning Code
  1. Article I — NAME AND SEAL; FORM OF GOVERNMENT; BOUNDARIES; MUN…
  2. Article II — ELECTIONS
  3. Article III — CITY COUNCIL
  4. Article IV — MAYOR
  5. Article V — ORDINANCES
  6. Article VI — ADMINISTRATION
  7. Article VII — FISCAL ADMINISTRATION
  8. Article VIII — OFFICERS AND EMPLOYEES
  9. Article IX — FRANCHISES
  10. Article X — INITIATIVE, REFERENDUM AND RECALL
  11. Article XI — MISCELLANEOUS PROVISIONS
  12. Chapter 10 — GENERAL PROVISIONS
  13. Chapter 30 — CITY COUNCIL
  14. Chapter 31 — CITY OFFICIALS
  15. Chapter 32 — CITY DEPARTMENTS
  16. Chapter 33 — BOARDS, COMMISSIONS, AND COMMITTEES
  17. Chapter 34 — PERSONNEL POLICIES
  18. Chapter 35 — FINANCE, REVENUE AND TAXATION
  19. Chapter 36 — HEALTH FACILITY REVENUE BONDS
  20. Chapter 37 — ELECTIONS
  21. Chapter 38 — CIVIL EMERGENCIES
  22. Chapter 39 — CITY POLICY
  23. Chapter 40 — TRANSFERS OF CITY-OWNED REAL PROPERTY
  24. ▸ Chapter 50 — SEWERS
    Overview
    1. § 50.001 PURPOSE AND POLICY.
    2. § 50.002 DEFINITIONS.
    3. § 50.003 ABBREVIATIONS.
    4. § 50.004 VANDALISM.
    5. § 50.005 CONFIDENTIAL INFORMATION.
    6. § 50.006 CONFLICTING PROVISIONS.
    7. § 50.007 SEVERABILITY.
    8. § 50.020 PROHIBITED DISCHARGE STANDARDS.
    9. § 50.021 FEDERAL CATEGORICAL PRETREATMENT STANDARDS.
    10. § 50.022 SPECIFIC POLLUTANT LIMITATIONS.
    11. § 50.023 CITY'S RIGHT OF REVISION.
    12. § 50.024 SPECIAL AGREEMENT.
    13. § 50.025 DILUTION.
    14. § 50.035 PRETREATMENT FACILITIES.
    15. § 50.036 ADDITIONAL PRETREATMENT MEASURES.
    16. § 50.037 ACCIDENTAL DISCHARGE/SLUG CONTROL PLANS.
    17. § 50.038 TENANT RESPONSIBILITY.
    18. § 50.039 HAULED WASTEWATER.
    19. § 50.040 GREASE HAULER PERMIT REQUIREMENTS.
    20. § 50.041 GREASE HAULER PERMIT APPLICATION.
    21. § 50.042 GREASE HAULER PERMIT REISSUANCE.
    22. § 50.043 GREASE HAULER PERMIT CONTENTS.
    23. § 50.044 GREASE HAULER PERMIT APPEALS.
    24. § 50.045 GREASE HAULER PERMIT MODIFICATION.
    25. § 50.046 REVOCATION OF PERMIT.
    26. § 50.050 WASTEWATER SURVEY.
    27. § 50.051 WASTEWATER DISCHARGE PERMIT REQUIREMENTS.
    28. § 50.052 WASTEWATER DISCHARGE PERMIT APPLICATION.
    29. § 50.053 WASTEWATER DISCHARGE PERMIT DECISIONS.
    30. § 50.054 DURATION OF PERMIT; REISSUANCE.
    31. § 50.055 PERMIT CONTENTS.
    32. § 50.056 APPEALS.
    33. § 50.057 PERMIT MODIFICATION.
    34. § 50.058 TRANSFER OF PERMIT.
    35. § 50.059 REVOCATION OF PERMIT.
    36. § 50.070 BASELINE MONITORING REPORTS.
    37. § 50.071 COMPLIANCE SCHEDULE PROGRESS REPORT.
    38. § 50.072 REPORT ON COMPLIANCE WITH CATEGORICAL PRETREATMENT ST…
    39. § 50.073 PERIODIC COMPLIANCE REPORTS.
    40. § 50.074 REPORTS OF CHANGED CONDITIONS.
    41. § 50.075 REPORTS OF POTENTIAL PROBLEMS.
    42. § 50.076 REPORTS FROM NONSIGNIFICANT INDUSTRIAL USERS.
    43. § 50.077 NOTICE OF VIOLATION; REPEAT SAMPLING AND REPORTING.
    44. § 50.078 NOTIFICATION OF THE DISCHARGE OF HAZARDOUS WASTE.
    45. § 50.079 ANALYTICAL REQUIREMENTS.
    46. § 50.080 SAMPLE COLLECTION; DETERMINATION OF NONCOMPLIANCE.
    47. § 50.081 RECORD KEEPING.
    48. § 50.090 PERMITS REQUIRED.
    49. § 50.091 IMPACT FEES AND INSTALLATION CHARGES.
    50. § 50.092 MAINTENANCE OF BUILDING SEWERS.
    51. § 50.093 MAIN EXTENSIONS.
    52. § 50.105 WASTEWATER VOLUME DETERMINATION.
    53. § 50.106 PRETREATMENT CHARGES AND FEES.
    54. § 50.107 WASTEWATER USER CHARGES.
    55. § 50.108 BILLING; PERSONS RESPONSIBLE FOR PAYMENT.
    56. § 50.109 PENALTY FOR NONPAYMENT.
    57. § 50.120 DUTIES OF CITY MANAGER.
    58. § 50.121 COMPLIANCE MONITORING.
    59. § 50.122 PUBLICATION OF INDUSTRIAL USERS IN SIGNIFICANT NONCOM…
    60. § 50.123 ADMINISTRATIVE ENFORCEMENT REMEDIES.
    61. § 50.124 JUDICIAL ENFORCEMENT REMEDIES.
    62. § 50.125 SUPPLEMENTAL ENFORCEMENT ACTION.
    63. § 50.126 REMEDIES NONEXCLUSIVE.
    64. § 50.127 AFFIRMATIVE DEFENSES TO DISCHARGE VIOLATIONS.
    65. § 50.201 PURPOSE.
    66. § 50.202 TRIGGERING EVENTS.
    67. § 50.203 INSPECTION METHODS.
    68. § 50.204 REVIEW OF INSPECTION RESULTS, STANDARDS.
    69. § 50.205 NOTICE TO REPAIR.
    70. § 50.206 TIMING AND COMPLETION OF WORK.
    71. § 50.207 FEE IN LIEU OF REPAIR, REPAIRS PERFORMED BY THE CITY …
    72. § 50.208 LATERAL CERTIFICATE.
    73. § 50.209 EXCEPTIONS.
    74. § 50.210 FEES.
    75. § 50.211 FAILURE TO REPAIR OR REPLACE.
    76. § 50.212 ASSISTANCE WITH SEWER REPAIR COSTS.
  25. Chapter 51 — SOLID WASTE
  26. Chapter 52 — UNDERGROUND UTILITY DISTRICTS
  27. Chapter 53 — WATER
  28. Chapter 54 — STORM WATER QUALITY MANAGEMENT AND DISCHARGE CONT…
  29. Chapter 55 — ENERGY
  30. Chapter 56 — STREETS
  31. Chapter 70 — GENERAL PROVISIONS
  32. Chapter 71 — TRAFFIC RULES
  33. Chapter 72 — STOPPING, STANDING AND PARKING
  34. Chapter 73 — BICYCLES
  35. Chapter 75 — MOBILE VENDORS OPERATING UPON A STREET
  36. Chapter 90 — ABANDONED VEHICLES
  37. Chapter 91 — ANIMALS
  38. Chapter 92 — FIRE PREVENTION
  39. Chapter 93 — PARKS AND RECREATION
  40. Chapter 94 — HEALTH AND SANITATION
  41. Chapter 95 — MUNICIPAL AIRPORT
  42. Chapter 96 — PARADES AND ASSEMBLIES
  43. Chapter 97 — SMOKING
  44. Chapter 98 — STREETS AND SIDEWALKS
  45. Chapter 99 — TRAINS AND RAILROADS
  46. Chapter 100 — HARBOR REGULATIONS
  47. Chapter 101 — FILMING
  48. Chapter 102 — BEEKEEPING
  49. Chapter 103 — PRIVATE SECURITY AND FIRE ALARM SYSTEMS
  50. Chapter 104 — MILITARY EQUIPMENT USE
  51. Chapter 110 — BUSINESS LICENSES
  52. Chapter 112 — AMBULANCES
  53. Chapter 113 — AMUSEMENTS
  54. Chapter 114 — CABLE TELEVISION SYSTEMS
  55. Chapter 115 — FOOD ESTABLISHMENTS AND OUTDOOR DINING AREAS
  56. Chapter 117 — MASSAGE PARLORS
  57. Chapter 118 — SOLICITORS, CANVASSERS, AND SIDEWALK VENDORS
  58. Chapter 119 — SECOND-HAND DEALERS
  59. Chapter 120 — TAXICABS AND LIMOUSINES
  60. Chapter 121 — OTHER VEHICLES FOR HIRE
  61. Chapter 122 — FOREIGN-TRADE ZONE
  62. Chapter 130 — OFFENSES AGAINST PUBLIC PEACE AND SAFETY
  63. Chapter 131 — PROPERTY OFFENSES
  64. Chapter 132 — DRUG OFFENSES
  65. Chapter 133 — WEAPONS OFFENSES
  66. Chapter 134 — ABATEMENT OF CHRONIC NUISANCE PROPERTIES
  67. Chapter 150 — BUILDING REGULATIONS
  68. Chapter 151 — AIRPORT ZONING
  69. Chapter 152 — PLANNING AND ZONING ADMINISTRATION
  70. Chapter 153 — FLOOD HAZARD AREA REGULATIONS
  71. Chapter 154 — SUBDIVISION REGULATIONS
  72. Chapter 155 — ZONING REGULATIONS
  73. Chapter 155 — ZONING REGULATIONS (old)
  74. Chapter 156 — COASTAL ZONING REGULATIONS
  75. Chapter 157 — HISTORIC PRESERVATION
  76. Chapter 158 — CANNABIS
  77. Chapter 159 — WIRELESS TELECOMMUNICATIONS FACILITIES

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