Transcript Slide 1

CMOM
Capacity, Management, Operation & Maintenance
and
Remote Wireless Monitoring of Collection Systems
5th Annual FVOA Mini Conference
August 18, 2011
Presented by:
John Frerich, P.E. - Walter E. Deuchler Associates, Inc.
Yokhana Alkass – Electrical Engineering Consultants, P.C.
Capacity, Management,
Operation & Maintenance
Purpose of CMOM

Better manage, operate and maintain collection
systems

Investigate capacity constrained areas of collection
system

Proactively prevent SSOs

Respond to SSO events
“The performance of a wastewater collection system
is directly related to the effectiveness of its CMOM
program.”
Regulatory Requirements
Title 35, Ill Admin. Code,
Subtitle C, Part 306.304:
Overflows
“Overflows from
Sanitary Sewers are
Expressly Prohibited”
Regulatory Requirements
NPDES Permit Special Condition
SPECIAL CONDITION NO. __
The Permittee shall work towards the goals of achieving no
discharges from sanitary sewer overflows or basement
backups and ensuring that overflows or backups, when they
do occur do not cause or contribute to violations of applicable
standards or cause impairment in any adjacent receiving
water. In order to accomplish these goals, the Permittee shall
develop and submit to the IEPA a Capacity, Management,
Operations, and Maintenance (CMOM) plan within twelve (12)
months of the effective date of this Permit. The Permittee may
be required to construct additional sewage transport and/or
treatment facilities in future permits or other enforceable
documents.
NPDES Permit Special Condition
The CMOM plan shall include the following elements:
a. Measures and Activities:
1. A complete map of the collection system;
2. Schedules, checklists, and mechanisms to ensure that
preventative maintenance is performed on equipment;
3. An assessment of the capacity of the collection and
treatment system at critical junctions and immediately
upstream of locations where overflows and backups
occur or are likely to occur; and
4. Identification
and
prioritization
deficiencies in the system.
of
structural
NPDES Permit Special Condition
b. Design and Performance Provisions:
1. Monitor the effectiveness of CMOM;
2. Upgrade the elements of the CMOM plan as necessary;
and,
3. Maintain a summary of CMOM activities.
c. Overflow Response Plan:
1. Know where overflows and backups occur; and,
2. Respond to each overflow or backup to determine
additional actions such as clean up.
d. System Evaluation Plan.
e. Reporting and Monitoring Requirements.
CMOM Evaluation Guide
Guide for Evaluating Capacity,
Management,
Operation,
and
Maintenance (CMOM) Programs at
Sanitary Sewer Collection Systems
www.epa.gov/npdes/pubs/cmom_guide_for_collection_systems.pdf
Collection System Capacity
 Flow Monitoring
 Sewer System Testing
 Sewer System Inspection
 Sewer System Rehabilitation
Collection System Management
 Organizational Structure
 Training
 Internal Communication
 Customer Service
 Management Information
System
 SSO Notification Program
 Legal Authority
Collection System Operation
 Budgeting
 Monitoring
 H2S Monitoring and Control
 Safety
 Emergency Preparedness and Response
 Modeling
 Mapping
 New Construction
Collection System Maintenance
 Budgeting
 Planned and Unplanned Maintenance
 Sewer Cleaning
 Parts and Equipment Inventory
Remote Wireless Monitoring of
Collection Systems
System Components
 Flow meters collect data at sewer overflows, interceptors
and other remote sites
 Cellular modules transmit the collected
commercial carrier’s cellular towers/network
data
over
 Data is received at a Server via the internet
 Data is stored in a database on the Server
 Operators access the collected data using only a web
browser
 Alarms are sent to multiple recipients’ cell phones or email
addresses.
Wireless Flow Monitoring System
Alarms/Text Msgs
Scheduled
Data
Transmittals
Flow
Meter
Commercial
Cellular Tower
Scheduled
Data
Transmittals
Flow
Meter
Flow
Meter
Data Hosting
Server
Flow
Meter
View Data Over
Internet
Benefits of Wireless
Data Collection System

Report of approaching alarm conditions before an actual
overflow event occurs

Opportunity to intervene to avert an overflow event

Avoid EPA reporting requirements
potential enforcement action

Near real-time access to flow data for analysis

Easy access to collected data from anywhere using only a
web browser

Cut costs and lower operating expenses by eliminating
unnecessary site visits by maintenance crews
and
subsequent
Manual Data Collection
 Data is collected once or
twice a month
 Overflow events may have
occurred already
 No opportunity to take
corrective
action
to
prevent overflows
 Potential EPA reporting
and enforcement action
Sites with Wireless
Data Collection Equipment
Alarms
 Instantaneous reporting of alarm conditions
 Receive alarms via cell phones or email
 Alarms can be sent to multiple recipients
 Opportunity to intervene before overflow conditions
occur (by dispatching crews to investigate and correct
conditions that could lead to overflows)
 Example Text Message:
Overflow #1 Dam: Level approaching 7.50”
Data Collection
 Scheduled data transmittals (typical: once per day)
 Ability to transmit data more frequently during an event –
as frequent as once every 5 minutes
 Data is received at a Server and is automatically stored in a
database
 Data is available for viewing from anywhere using a web
browser
 Security is applied via user passwords
Summary
 Motivation for Wireless flow data collection:
Avoid EPA reporting and potential enforcement
action
 Receive alarms BEFORE overflow events occur
 Access data anywhere via web browser
 Reduce maintenance costs and site visits
DISCUSSION AND