(a) Purpose. The City operates and maintains sanitary sewer systems within the City and by agreement outside of the City. The City operates these systems pursuant to Ohio E.P.A. regulations and the conditions and regulations established in the City's NPDES permits. Excessive infiltration and storm water inflow into these sanitary sewer systems may result in system overflows and bypasses and excessive loadings on treatment facilities in violation of Ohio E.P.A. regulations and NPDES permit conditions. Additionally, these conditions pose potential public health and safety concerns and impose unnecessary and avoidable system costs.
The City has determined that its sanitary sewer systems may be impacted by excessive infiltration and storm water inflow attributable to private property sewer facilities. The purpose of these rules is to allow for the identification and remediation of excessive infiltration and storm water inflows attributable to private sewer facilities and to establish a policy of enforcement.
(b) Definitions. The following definitions apply for purposes of these rules and regulations.
(1) Average Metered Water - This is the water meter readings for a period of usage (i.e.: a typical usage month divided by the number of days in the monthly billing period), or yearly readings divided by 365 days, or water reading averaged for a sanitary flow monitoring period to be determined by the Sanitary Engineer.
(2) Average Daily Metered Water Usage Rate - This is the Average Daily Metered Water Usage divided by 1440 minutes to calculate a gallon per minute rate of flow.
(3) Dry Average Flow - The dry average flow is the amount of water in the collection system on an average dry day expressed in gallons per day. This flow can be measured with portable flow meters or estimated using population equivalents or EDU's for the collection subsystem area.
(4) Establishment - Any residence, condominium, homeowner's association, commercial development, industrial development, or institutional development, which has a private sanitary sewer connection to the public sanitary sewer.
(5) Infiltration - Water other than wastewater that enters a sewer system (including sewer service connections and foundation drains) from the ground through such means as defective pipes, pipe joints, connections or manholes. Infiltration does not include, and is distinguished from, inflow.
(6) Inflow - Water other than wastewater that enters a sewer system (including sewer service connections and foundation drains) from sources such as, but not limited to, roof leaders, cellar drains, yard drains, area drains, foundation drains, field tile, drains from springs and swampy areas, manhole covers, cross connections between storm sewers and sanitary sewers, catch basins, cooling towers, storm waters, surface run-off, street wash water, or drainage. Inflow does not include, and is distinguished from, infiltration.
(7) Metered Average Dry Weather Sanitary Flow - This is the Average Daily Metered Flow (in gallons) during a metering period which occurs on non-storm impacted days.
(8) Metered Average Dry Weather Sanitary Flow Rate - This is the Metered Average Dry Weather Sanitary Flow (in gallons) divided by 1440 minutes in order to calculate a gallon per minute rate of flow.
(9) National Average Daily Dry Weather Flow Rate Per EDU - This is the National Average Daily Dry Weather Flow divided by 1440 minutes to calculate a gallon per minute rate of flow.
(10) Ohio EPA/U.S. EPA Theoretical Average Dry Weather Sanitary Flow - This is the Theoretical Daily Design Flow per equivalent dwelling unit (EDU) based on domestic usage of 80 gallons per capita day (gpcd) and four (4) people per EDU or 320 gallons per day (gpd)/EDU for a residential unit. All other classes are converted to EDU's by dividing their Daily Ohio EPA Theoretical Design Flow by 400 gpd, and then multiplying by 320 gpd/EDU to obtain their Theoretical Average Dry Weather Sanitary Flow in gallons per day.
(11) Ohio EPA/U.S. EPA Theoretical Average Dry Weather Sanitary Flow Rate - This is the Ohio EPA/U.S. EPA Theoretical Average Dry Weather Sanitary Flow divided by 1440 minutes to calculate a gallon per minute rate of flow.
(12) Safety-Service Director - The City of Port Clinton Safety-Service Director.
(13) Sanitary Sewers - A conduit intended to carry liquid and water-carried waste from residences, commercial buildings, industrial plants, and institutions together with non-excessive quantities of ground, storm, and surface waters.
(14) Sanitary Sewer User - A person, firm, or corporation owning, leasing, or occupying real property within the jurisdiction of the City sewer system, which property is served by a connection to sanitary sewers maintained or operated by the City. The real property served may be residential, commercial, governmental, or industrial.
(15) Wet Maximum Flow- (Metered) - The amount of water flowing from the collection system during wet weather conditions with saturated soils averaged over on 24-hour period measured in gallons per day. This flow rate shall be measured with portable flow meters.
(16) Wet Peak Flow - (Metered)- The peak incremental flow observed flowing from the collection system during wet weather conditions with saturated soil measured in gallons per minute. This could be in increments of 15 minutes, but no more than hourly. This flow rate shall be measured with portable flow meters.
(17) Calculated Wet Maximum Flow - This calculated value is based on the theoretical dry average flow value per EDU plus an appropriate I/I allowance multiplied by the calculated number of ED Us. The value used for this policy is 960 gpd per EDU. This value is compared to the wet maximum flow observed over a 24-hour period for one (I) EDU. Calculations for this value can be found in Table "A" of this section.
(18) Calculated Wet Peak Flow - This calculated value is based on the theoretical dry average flow value per EDU plus an appropriate I/I allowance multiplied by the calculated number of EDUs. The value used for this policy is 0.889 gpm per EDU. This value is compared to the wet peak flow observed over a one hour period for one (I) EDU. Calculations for this value can be found in Table "A" of this section.
(c) Duty of Property Owner to Maintain. It is the duty of the owner of real property served by a connection to sanitary sewers maintained or operated by the City to construct, operate, and maintain all sanitary sewer facilities located on or within the owner's real property in accordance with all applicable state and local laws, statutes, rules and regulations including, but not limited to, Ohio E.P.A. regulations and the City of Port Clinton Wastewater Rules and Regulations and Codified Ordinances of the City.
(d) Prohibited Inflow.
(1) No person, including the property owner or sanitary sewer user, shall connect storm water inflow to sanitary sewers maintained and operated by the City, nor shall such person cause, permit, or allow inflow into such sanitary sewers except by written permission of the Safety-Service Director.
(2) Whenever the Safety-Service Director determines that Section 913.11(d)(2) has been, or is being, violated, he shall issue a written order to the property owner and/or sanitary sewer user to disconnect such unlawful connection or otherwise remove or relocate the unlawful inflow in accordance with applicable building or health codes or other state or local regulations.
(3) Any unlawful connection or inflow under this section constitutes a nuisance subject to injunctive relief and abatement pursuant to Chapter 3767 of the Ohio Revised Code or as otherwise permitted by law.
(4) Any person violating this section is subject to penalties provided in Section 913.99 of the Port Clinton Codified Ordinances. Any person subject to written order of the Safety-Service Director pursuant to Section 913.11 (D)(2) is entitled to appeal pursuant to Section 105.04 of the Port Clinton Water Regulations and By-Laws.
(5) Upon continuing violation of this section or written order issued pursuant to this section, the Safety-Service Director may restrict flow or disconnect sewer service. Except in a case of emergency, disconnections shall occur no earlier than thirty (30) days after service of written notice of disconnection.
(e) Excessive Infiltration Defined. For purposes of these rules and regulations, "excessive infiltration" is defined to be that infiltration which violates two (2) or more of the following standards of acceptable practice:
(1) Where metered sanitary sewer flows or physical timed monitoring of the same exceed three (3) times the water meter flows during the same general monitoring period.
(2) Where wet maximum (metered) sanitary sewer flows or physical timed monitoring of the same exceed three (3) times the water meter flows during the same general monitoring period.
(3) Where the wet peak (metered) sanitary flow exceeds the metered average dry weather sanitary flow rate or Average Monthly Metered Water Usage Rate by four (4) times during any 15 minute or one hour daily incremental period.
(4) Where direct visual observation by an authorized City representative has determined a potential infiltration contribution source and where such occurrence is documented in a dated observation report.
(5) Where the wet maximum flow measured exceeds the Ohio EPA/U.S. EPA Theoretical Average Dry Weather (daily or monthly) Sanitary Flow by three (3) times. Example- 3 X 320 gpd/E.D.U. in a 24 hour period.
(6) Where the peak flow measured exceeds the Ohio EPA/U.S. EPA Theoretical Average Dry Weather (daily or monthly) Sanitary Flow Rate by four (4) times for any incremental hourly period. Example- 4 X 320 gpd/E.D.U. in any I hour period.
(7) Where dye testing, smoke testing, or internal video inspection indicates potential infiltration contribution sources which could contribute to excessive infiltration in the system.
(8) Where dry weather metered sanitary flows exceed metered water usage by 2:1 during the metering period. This testing would be not related to an actual rainfall event, but could be subsequent to an event.
(f) Excessive Infiltration and Enforcement of Remediation. Where real property served by a connection to sanitary sewer maintained or operated by the City is suspected by the Safety-Service Director of contributing excessive infiltration and/or inflow to the City sanitary sewer system, the Safety-Service Director shall determine and enforce remediation as follows:
(1) The Safety-Service Director, or his agent, may conduct an inspection of the private collection system(s) located on the subject real property. The inspection may include visual or video observation, smoke testing, flow metering, or use of other means commonly accepted in the industry.
(2) The property owner and/or sanitary sewer user shall cooperate with the Safety-Service Director, and/or his agent, with the inspection including, but not limited to, allowing reasonable access to private property and providing pertinent data.
(3) Following the flow monitoring, the Safety-Service Director will determine the excessive infiltration/inflow, if any, and issue a written Notice of Violation to the property owner and/or sanitary sewer user.
(4) The property owner and/or sanitary sewer user shall, within fourteen (14) days of receipt, notify the Safety-Service Director in writing acknowledging the written Notice of Violation.
(5) The property owner and/or sanitary sewer user shall, within thirty (30) days after acknowledging receipt of the Notice of Violation or such other time as the Safety-Service Director allows, meet with the Safety-Service Director and/or his representative to discuss the Notice of Violation and remedial action to be taken.
(6) The property owner shall, when required by the Safety-Service Director, within sixty (60) days after acknowledging receipt of the Notice of Violation, or such other time as the Safety-Service Director allows, employ a professional engineer to prepare a written Sewer System Evaluation Survey, which identifies the following:
A. The sources of the infiltration/inflow including the means and methods used to derive each source, testing results, videos and any other information available.
B. Necessary actions to repair, replace, or correct defective sewer facilities located on or within the private property to eliminate excessive infiltration/inflow;
C. Estimated cost of repair, replacement, and/or correction;
D. Proposed schedule for remediation.
(7) The property owner, when required by the Safety-Service Director and within one hundred fifty (150) days after acknowledging receipt of the Notice of Violation or such other time as the Safety-Service Director allows, shall submit to the Safety-Service Director an Infiltration/Inflow Remediation Plan prepared by a professional engineer. The Remediation Plan shall include a recommendation by the engineer identifying the remediation actions necessary to eliminate the excessive infiltration/inflow. The remediation action may include the repair, replacement or correction of defective sewer facilities referenced in the engineers report using commonly accepted industry practices including, but not limited to, sealing, chemical grouting, pipe lining, relining, sewer and manhole replacement.
(8) The proposed remediation action shall be subject to the approval of the Safety-Service Director. The Safety-Service Director shall consider the degree of excessive infiltration/inflow, proper remediation techniques, effectiveness, and cost. The property owner shall, within sixty ( 60) days of the approval of the Remediation Plan by the Safety-Service Director, submit detailed replacement plans prepared by a professional engineer identifying the remediation work to be performed.
(9) Upon the approval of the Safety-Service Director, the property owner shall submit to the Ohio EPA the detailed replacement plans requesting an OEPA issued Permit to Install. The property owner shall subsequently apply for a repair permit from the City of Port Clinton.
(10) The property owner shall have ninety (90) days to complete the remediation work from the date the City permit is issued.
(g) Prohibitions.
(2) No person, including the property owner, shall cause, permit, or allow excessive infiltration/inflow into the sanitary sewer maintained and operated by the City after receipt of a written Notice of Violation issued by the Safety-Service Director pursuant to Section 913.11(f)(3).
(3) Any unlawful excessive infiltration/inflow under this section shall constitute a nuisance subject to injunctive relief and abatement pursuant to Chapter 3767 of the Ohio Revised Code or otherwise permitted by law.
(4) Upon continuing violation of this section or written Notice of Violation issued by the Safety-Service Director, the Safety-Service Director may restrict flow or disconnect sewer service. Except in a case of emergency, disconnection shall occur no earlier than thirty (30) days after service of a written notice of disconnection.
INFILTRATION AND INFLOW
TABLE "A"
Calculation for Infiltration/Inflow:
Since Ohio EPA uses 400 gallons per day per equivalent dwelling unit (EDU) as a design standard and Pott Clinton uses the Ohio EPA standard as a basis for current billing, the SSES Policy was correlated with this standard while using the U.S. EPA handbook Sewer System Infrastructure Analysis and Rehabilitation and the American Society of Civil Engineers' Existing Sewer Evaluation and Rehabilitation, WEF Manual of Practice FD-6, ASCE Manuals and Reports on Engineering Practice No. 62, second edition, as additional resources.
The Ohio EPA Standard is based on 100 gallons per capita day (gpcd) usage and four ( 4) people per family or 400 gpd/EDU. The Ohio EPA 100 gpcd standard could be further allocated as 80 gpcd for domestic flow and 20 gpcd as infiltration based on U.S. EPA criteria.
The ASCE' s Existing Sewer Evaluation and Rehabilitation, Existing Sewer Evaluation and Rehabilitation, WEF Manual of Practice FD-6, ASCE Manuals and Reports on Engineering Practice No. 62, second edition, states, "Even in a well constructed, separated system, the ratio of wet maximum to dry average usually ranges from 2 to 3 and wet peak to dry average from 3 to 4; higher values indicated a more pronounced problem.
A. Ohio EPA EDU = 400 gpd (based on 100 gpcd)
= 320 gpd (based on 80 gpcd domestic flow)
= Wet Max= 3 x 320 = 960 gpd/EDU
= Wet Peak= 4 x 320 = 1,280 gpd/EDU
Summary
I. The highest wet maximum flow would be 960 gpd per EDU. Under no circumstances will the acceptable wet maximum flow exceed this amount.
2. The highest wet peak flow would be 1,280 gpd per EDU divided by 1440 minutes = 0.889 gpm. Under no circumstances will the acceptable wet peak flow rate exceed this amount.
The Director of Public Safety and Service or his authorized representative shall be charged with the enforcement of these regulations, shall conduct such surveys as may be necessary to detect any existing connection of roof drains to sanitary sewers, and the Director or his authorized representative bearing proper credentials shall be permitted to enter upon all properties for the purpose of inspection, observation and testing in accordance with the provisions of this chapter.
(Ord. 10-16. Passed 4-26-16.)