Attachment A
Underground Storage Tank Monitoring Plan
Authority Cited: Title 23 CCR, Sections 2632(d)(1), 2634(d)(2), and 2641(h)
California Underground Storage Tank (UST) Regulations require that facilities with USTs have a written
monitoring plan describing equipment and procedures used to monitor tank systems for leaks. The plan must be
approved by the local UST regulatory agency. If your facility already has a plan which has been approved by
the local agency that regulates USTs in your jurisdiction, do not complete this document unless directed to do
so by your local agency. This boilerplate plan is suitable only for the monitoring methods described below. If
other methods are used, a different format may be required.
Monitoring plans must be revised and submitted to your local agency within 30 days of any personnel change or
other situation which affects the information they contain. Changes in UST monitoring equipment or
procedures require submittal of a revised plan to your local agency for review and approval prior to
implementation. A current copy of the plan must be kept at the tank site.
A. General Information
Facility Name: _____________________________________________________________________________
Site Address: ________________________________________
City: _______________________________
Tank and piping monitoring is identical for all USTs at this facility; or
This plan covers only the following tank(s): ___________________________________________________
No electronic leak detection systems are used to monitor UST systems covered by this plan; or
The following type of electronic monitoring system performs leak detection monitoring for UST systems
covered by this plan:
Manufacturer: ________________________________ Model No.: ________________________________
B.
Tank Monitoring
Tank monitoring is performed using the following methods: (Check all which apply)
Continuous electronic monitoring of tank annular (interstitial) space or secondary containment vault.
Leak Sensor Manufacturer: ___________________________ Model No.: _______________________
Automatic Tank Gauging (ATG) system used to monitor single-wall tank(s).
In-Tank Probe Manufacturer: _________________________ Model No.: _______________________
Frequency of Leak Tests:
Continuous (e.g. CITLD, CSLD);
Daily/Nightly;
Weekly;
Monthly;
Other (specify): ___________________________________
Programmed Test Leak Threshold:
0.1 g.p.h.;
0.2 g.p.h.
Manual Inventory Reconciliation (MIR).
Weekly Manual Tank Gauging - Testing Period is:
36 hours;
60 hours.
Tank Tightness Testing - Conducted:
Annually;
Monthly;
Other (specify): _________________
Other (specify):
UN-022A - 1/6
www.unidocs.org
Underground Storage Tank Monitoring Plan - Page 2
C. Pipeline Monitoring
Line monitoring is performed using the following methods: (Check all which apply)
Continuous electronic monitoring of piping sump(s)/trench and other secondary containment low points.
Leak Sensor Manufacturer: __________________________ Model No.: ______________________
Will a piping leak alarm trigger automatic shutdown of the pump (i.e. turbine)?
Yes;
No.
Will failure/disconnection of monitoring system trigger automatic shutdown of pump?
Yes;
No.
Mechanical line leak detector (MLLD) that routinely performs 3.0 g.p.h. leak tests and restricts or shuts off
product flow when a leak is detected.
MLLD Manufacturer: ______________________________
Model No.: ______________________
Electronic line leak detector (ELLD) that routinely performs 3.0 g.p.h. leak tests.
ELLD Manufacturer: _______________________________ Model No.: ______________________
Programmed line tightness tests:
Minimum Monthly 0.2 g.p.h.;
Minimum Annual 0.1 g.p.h.
Will ELLD detection of a piping leak trigger automatic shutdown of the pump?
Yes;
No.
Will failure or disconnection of the ELLD trigger automatic shutdown of the pump?
Yes;
No.
Line tightness testing conducted:
Annually;
Every 3 years;
Other (specify): _________________
No product or remote-fill piping is connected to the UST(s).
Is suction piping meeting all requirements for exemption from monitoring. [See 23 CCR §2636(a)(3)]
Other (specify):
D. Dispenser Leak Detection: (Check all which apply)
No dispensers in system.
Float and chain assembly in under-dispenser containment trips shear valve in case of leak.
Assembly Manufacturer: __________________________
Model No.: ______________________
Continuous electronic monitoring of under-dispenser containment.
Leak Sensor Manufacturer: __________________________ Model No.: ______________________
Will a leak trigger audible and visual alarms?
Yes;
No.
Will a leak alarm trigger automatic shutdown of the pump?
Yes;
No.
Will failure/disconnection of monitoring system trigger automatic shutdown of pump?
Yes;
No.
Dispenser housings are opened and fittings inside are visually inspected daily for leaks (required if underdispenser containment is not installed).
Other (specify):
E.
Monitoring Locations
Included with this monitoring plan is a Site Plan which shows the general tank and piping layouts and the
locations where monitoring is performed (i.e. locations of sensors, line leak detectors, control panels, etc.).
UN-022A - 2/6
www.unidocs.org
Underground Storage Tank Monitoring Plan - Page 3
F.
Indirect Hazard Determination
N/A
[Note: This information is required only when the presence of the hazardous substance cannot be
determined directly by the monitoring method used (e.g. where liquid level measurements in a tank annular
space are used as the basis for leak determination)]
The following steps will be taken to determine the presence or absence of a hazardous substance in the tank
interstitial space if monitoring indicates a possible unauthorized release:
G. Equipment Testing and Preventive Maintenance
State law requires that testing, preventive maintenance, and calibration (if applicable) of monitoring equipment
(e.g. sensors, probes, line leak detectors, etc.) be performed in accordance with the equipment manufacturers’
instructions or annually, whichever is more frequent. Such work must be performed by qualified personnel.
Monitoring equipment is serviced:
Annually;
Other (specify): __________________________________
The contractors who will perform repairs and/or certification of leak detection monitoring equipment are:
Equipment Type
Company Name
Monitoring system control panels, probes, sensors.
Telephone No.
Line leak detectors (if installed).
H. Personnel Responsibilities
The following facility personnel are responsible for performing UST monitoring activities and/or maintaining
UST leak detection equipment:
Area of Responsibility
Conducting routine monitoring activities.
Name(s)
Job Title(s)
Performing periodic inspections of equipment.
Reporting of alarms, leaks, equipment problems.
Arranging equipment testing, servicing, calibration.
Maintaining UST monitoring records.
Other (specify):
UN-022A - 3/6
www.unidocs.org
Underground Storage Tank Monitoring Plan - Page 4
I.
Reporting Format (Check all which apply)
This facility will use the Unidocs “Hazardous Materials Monitoring System Inspection Form” to document
inspections (performed at least monthly) of electronic monitoring systems to ensure that they are in proper
working order.
We will use our own documents to record inspections (performed at least monthly) of electronic monitoring
systems. (Note: A sample copy of each document used must be attached to this monitoring plan.)
A sample copy of each additional UST monitoring form/log used (e.g. alarm logs, MIR forms, etc.) must be
attached to this monitoring plan.
*
J.
No in-tank leak detection* methods are employed on these tanks as part of required monitoring; or
Attached to this monitoring plan is a copy of the system set-up report generated by the in-tank leak detection
system.
(Note: Inventory management is often performed by the same equipment that performs in-tank leak
detection. If you have double-wall tanks, you are not required to include automatic tank gauging as part of
your formal written monitoring program.)
Training
Copies of the following reference documents are maintained at the facility: (Check any which apply)
This Underground Storage Tank Monitoring Plan.
Operating manuals for electronic monitoring equipment.
California Underground Storage Tank Regulations
State Water Resources Control Board (SWRCB) publication: “Handbook for Tank Owners - Manual and
Statistical Inventory Reconciliation”.
SWRCB publication: “Weekly Manual Tank Gauging for Small Underground Storage Tanks.”
Other (specify):
Facility personnel with UST monitoring responsibilities have been familiarized with all of the above documents
relevant to their job duties. These persons have access to those documents when needed.
Personnel responsible for performing inspections are trained to follow a consistent inspection routine and to
document inspections in a thorough manner. They are trained to distinguish proper equipment function from
obvious hardware or software failures. These personnel have been trained in proper procedures for reporting
alarms, leaks, equipment failure, or other problems.
Personnel responsible for arranging preventive maintenance, servicing, or calibration of monitoring equipment
have sufficient authority to contract such work as may be needed.
Personnel responsible for maintaining UST monitoring records (i.e. logs, test reports, equipment service reports,
etc.) have been instructed that such records must be maintained on-site and available for inspection for a
minimum of 3 years unless the local agency has indicated otherwise.
UN-022A - 4/6
www.unidocs.org
Underground Storage Tank Monitoring Plan - Page 5
New employees, or employees newly assigned to duties involving monitoring or operation of other tank
systems, are trained under the direct supervision of personnel familiar with the facility’s UST systems and
procedures and are not allowed to perform such duties until they have demonstrated their ability to perform such
duties properly. Refresher training is provided as necessary to keep skills sharp.
The following additional UST monitoring training is provided to facility personnel:
K. Comments/Additional Information (Attach additional pages if needed.)
L.
Certification
I have reviewed this Underground Storage Tank Monitoring Plan and determined that it accurately
describes monitoring of underground storage tank system(s) at this facility.
Signature of Owner/Operator: _________________________________________ Date: ______________.
Agency Use Only
This plan has been reviewed and:
Approved;
Approved With Conditions;
Disapproved.
Local Agency Signature: ________________________________________ Date: ____ /____/____.
Comments/Special Conditions: __________________________________________________________________________
____________________________________________________________________________________________________
____________________________________________________________________________________________________
UN-022A - 5/6
www.unidocs.org
Underground Storage Tank Monitoring Plan - Page 6
UST Monitoring Site Plan
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Date map was drawn or revised: ____________________________.
Instructions
If you already have a diagram (e.g. your Hazardous Materials Business Plan Site Plan/Storage Map) which
shows all required information, you may include it, rather than this page, with this monitoring plan. On your
site plan, show the general layout of tanks and piping in relation to nearby buildings or other structures. Clearly
identify locations of the following equipment, if installed: monitoring system control panels; mechanical or
electronic line leak detectors; sensors monitoring tank annular spaces, sumps, trench systems, under-dispenser
containment, or other secondary containment areas; and, if ATG is required, in-tank liquid level probes. In the
space provided, note the date the drawing was prepared.
UN-022A - 6/6
www.unidocs.org