What are Private Sewer Laterals?

Transcription

1 Lateral Creativity Patrick McNelly, Principal Staff Analyst Orange County Sanitation District (OCSD) Fountain Valley, CA SCAP Collection Systems in Motion Workshop

2 What are Private Sewer Laterals?

3 Different Definitions? u Main Sewer u Side Sewer u Building Sewer u Lateral Sewer u House Sewer

4 What Do You Call it? u Upper Lateral u Lower Lateral u Right-of-way Lateral u Encroachment Lateral u Easement Lateral u Shared Lateral u Side Sewer u Building Sewer

5 Sewer System Overview BUSINESS Grease Trap Cleanout RESIDENCE Downspout Manhole Private Service Laterals Cleanout Manhole Local Main Sewer Line Regional Trunkline Sewer Wastewater Treatment Plant

6 Typical Private Lateral HOUSE,APARTMENT OR COMMERCIAL BUILDING RIGHT OF WAY OR EASEMENT (PUBLIC SIDE) PROPERTY LINE PRIVATE SIDE CURB SIDEWALK PROPERTY LINE CLEANOUT BULDING CLEANOUT SANITARY SEWER LATERAL DRAIN FROM BATHTUB, SHOWER, SINK, ETC. (MAY BE SEVERAL EXISTING UNDER BUILDING) STACK SERVICE TEE-WYE MAINLINE SANITARY SEWER PRIVATE SANITARY SEWER LATERAL

7 Sewer Lateral Problems HOUSE,APARTMENT OR COMMERCIAL BUILDING RIGHT OF WAY OR EASEMENT (PUBLIC SIDE) PROPERTY LINE ROOF DRAIN CONNECTION PRIVATE SIDE CURB SIDEWALK PROPERTY LINE CLEANOUT MISSING CLEANOUT CAP SANITARY SEWER LATERAL ROOT PENETRATION BUILDING CLEANOUT DRAIN FROM BATHTUB, SHOWER, SINK, ETC. (MAY BE SEVERAL EXISTING UNDER BUILDING) STACK SERVICE TEE-WYE MAINLINE SANITARY SEWER SEPARATED JOINTS BREAKS, CRACKS, HOLES BREAKS, CRACKS, HOLES PRIVATE SANITARY SEWER LATERAL BROKEN OR DEFECTIVE CLEANOUT

8 Typical Lateral Connection

9 Typical Causes of I/I Problems

10 I/I Issues u How do I inspect? u Quantifying problems? u How to communicate? u Capacity issues? u Effect on peak flows u Dirt pipes u Fix the problem, not the blame u No programs u No record keeping

11 Maintenance Issues u No plumbing access - Where s my cleanout? u Reactive maintenance only u Roots, Roots, Roots u Broken joints u The drain is not a dump u Orangeburg pipe u Broken connections u No accountability u No record keeping

12 Construction Standards u Bedding Failure at installation? u Cleanouts? u Acceptable pipe materials? u Acceptable rehab methods? u Sliplining not approved? u Testing and inspection? u New/Repairs/Rehabs/Replacement?

13 Ownership Collection System? u Upper/lower and connection to main u Lower and connection to main u Connection to main only u We don t own any part of the lateral

14 Ownership Property Owner? u Upper lateral only u Upper and lower lateral, and connection to main

15 Ownership Undetermined? u Laterals in right-of-way, easement, or encroachment (It s not my lateral!) u Privately owned satellite systems u Mobile home parks u Senior citizen communities u Other

16 Discussion Topics u Private ownership of laterals from the building to the sewer main u Residents unaware of policies or problems u City record keeping is incomplete, unavailable (where s my lateral)? u Many laterals reaching end of design life u Most sewer fees only cover local sewer system O&M, not private lateral repairs

17 What s Being Done? u Lateral insurance programs u Sewer fees fund repairs u City lateral maintenance programs to remove roots from city trees u Mandatory replacement/rehab during major remodeling u Rethinking the issue of private vs. public ownership

18 The Rest of the Story u Some Orangeburg pipe still in the ground u Mortar joints failing in old VCP u Lateral inspection not required at time of sale u Status of I/I problem undocumented u Incentives lacking for cities to assist residents in lateral repair u Orphan child of collection systems

19 Some Final Comments u Should regional agencies assist in private lateral repair programs? u It s not just an engineering problem u Will fixing the lower lateral fix the I/I problem? u Residents ask, Why should I have to pay for a problem under the city street? u Where s my property line?

20 A Sign of Our Times

21 The Final Solution?

22 Questions? Patrick McNelly Principal Staff Analyst Collections Facilities O&M and Services (714) Orange County Sanitation District