Appendix A - Detailed State Requirements for Secondary Containment

State/Territory EPA 

Region

Regulation date Secondary containment 

requirement

Repair versus replace 

threshold

STP sumps 

required?

UDC for Motor 

Fuel Only?

Links Comments

Connecticut 1 10/1/2003 Required for all new and 

replacement tanks/piping Not specified No No UDC Rqt Yet

http://www.ct.gov/dep/cwp/view.

asp?a=2692&q=322594&depNav_G

ID=1652

http://www.cga.ct.gov/2005/pub/C

hap446k.htm#Sec22a-449o.htm

Excludes residential USTs.

Maine 1 4/3/2007 Required for all new and 

replacement tanks/piping

Only the major component 

replaced will need to meet the 

rule’s design and installation 

requirements for new and 

replacement facilities.

No No

http://maine.gov/dep/rwm/ust/sta

tutesrules.htm

All piping sumps including dispenser sumps and pans shall 

be provided with continuous leak detection monitoring. 

Massachusetts 1 12/1/1986 Required for all new and 

replacement tanks/piping Decided by Fire Department Yes No

http://www.mass.gov/Eeops/docs/

dfs/osfm/cmr/cmr_secured/52700

9.pdf

All sumps must monitor continuously for product loss.

New Hampshire 1 2/3/2005 Required for all new and 

replacement tanks/piping

Repairs of single-walled piping 

is not allowed Yes No

http://des.nh.gov/organization/co

mmissioner/legal/rules/documents

/env-wm1400.pdf

Rhode Island 1 8/1/2007 Required for all new and 

replacement tanks/piping

Any modification to or 

replacement of facility 

components shall be made to 

conform with the 

requirements of Rule 9 New 

and Replacement Tank System 

Requirements.

Director of Department can 

approve a repair.

Yes Yes

http://www.dem.ri.gov/pubs/regs/

regs/waste/ustreg07.pdf

Vermont 1 8/1/2007 Required for all new and 

replacement tanks/piping

State must be notified if more 

than 20 feet of piping is to be 

replaced.

Yes No

http://www.anr.state.vt.us/dec/waste

div/ust/regs/fullUSTregs.pdf

http://www.anr.state.vt.us/dec/waste

div/ust/pubs/USTTalk_Winter_09.pd

f

Vermont rules require secondary containment for all 

category 1 and category 2 tanks. Category 1 UST means any 

UST, regardless of its capacity, except: (a) Fuel oil storage 

tanks used for on-premises heating purposes, or (b) Farm or 

residential tanks used for storing motor fuel; Category 2 UST 

means any UST with a capacity greater than 1,100 gallons 

that is a farm or residential motor fuel tank. These tanks are 

inclusive of Federally Regulated Petroleum USTs.

New Jersey 2 8/20/2007

Within Wellhead Protection 

Areas, required within 2,000 feet 

for gasoline or hazardous 

substance tanks/piping; required 

within 750 feet for non-gasoline 

petroleum tanks/piping

Not specified No No UDC Rqt Yet

http://www.nj.gov/dep/srp/regs/u

st/ustrule.pdf

New York 2 2/12/1992 Required for all new tanks only 

(does not cover piping)

Any addition, repair, or 

replacement to an existing 

facility must meet new 

requirements.

No No UDC Rqt Yet http://www.dec.ny.gov/regs/4432.

html#15935

TO 3003, TDD #13, EPAct State Decisions Page 1 of 10 July 24, 2009
Appendix A - Detailed State Requirements for Secondary Containment

State/Territory EPA 

Region

Regulation date Secondary containment 

requirement

Repair versus replace 

threshold

STP sumps 

required?

UDC for Motor 

Fuel Only?

Links Comments

Puerto Rico 2 11/1/1990 Not available online Not specified No No UDC Rqt Yet

http://www.gobierno.pr/NR/rdonl

yres/667951D6-B109-4D68-B8CC85FC783D170B/0/ControlTanquesS

oterrados.pdf

Virgin Islands 2 5/1/2000 Not available online Not specified No No UDC Rqt Yet http://www.dpnr.gov.vi/dep/tanks.

htm

Delaware 3 1/11/2008 Required for all new and 

replacement tanks/piping Not specified Yes No

http://regulations.delaware.gov/A

dminCode/title7/1000/1300/1351.

pdf

District of 

Columbia 3 10/1/1999 Required for all new and replacement tanks/piping

100%, excluding connectors 

(proposed 7-09) No

Yes (proposed 7-

09)

http://dchealth.dc.gov/DOH/frame

s.asp?doc=/doh/lib/doh/services/a

dministration_offices/environment

al/services2/ustd/pdf/allreg1.pdf&

group=1813

Maryland 3 1/26/2005 Required for all new and 

replacement tanks/piping 40 percent of piping Yes No

http://www.mde.state.md.us/asset

s/document/OilControl/Oil_Polluti

on_Tank%20Man_Reg26.10.pdf

Pennsylvania 3 11/10/2007 Required for all new and 

replacement tanks/piping 50 percent of piping Yes No

http://www.pacode.com/secure/data/

025/chapter245/chap245toc.html

Virginia 3 3/1/2004

Amendment proposed to require 

secondary containment within 

1,000 feet of CWS or PDWW

50 percent (draft) No Yes (Draft) http://www.deq.virginia.gov/tanks

/secpro.html Requirements are draft.

West Virginia 3 7/1/2008 Required for all new and 

replacement tanks/piping

20 feet or 50 percent of piping, 

whichever is less Yes No

http://www.wvdep.org/item.cfm?ssid

=13&ss1id=978

http://www.wvsos.com/csrdocs/word

docs/33-30.doc

repair versus replace comes from WV guidance

Alabama 4 8/6/2007 Required for all new and 

replacement tanks/piping

Five feet of piping or if the 

repair cannot be completed 

within 30 days

Yes No http://www.adem.state.al.us/Regulat

ions/regulations.htm

Florida 4 6/21/2004 Required for all new and 

replacement tanks/piping Not specified Yes No

http://www.dep.state.fl.us/legal/R

ules/waste/62-761.pdf

Proposed rules - 

http://www.dep.state.fl.us/waste/quick_topics/publications

/pss/tanks/rulemaking/CH62-761_Workshop_Draft.pdf

Georgia 4 4/1/2008 Required within 1,000 feet of 

CWS or PDWW

25 percent of piping No Yes

http://rules.sos.state.ga.us/docs/3

91/3/15/07.pdf

Interstitial electronic monitoring system must be tested 

annually in accordance with the manufacturer’s 

specifications to verify the accuracy of its operations.

Kentucky 4 9/13/2006 Required for all new and 

replacement tanks/piping

Entire individual piping run 

extending from the tank to the 

farthest dispenser or other enduse equipment

Yes Yes

See 401 KAR 42:020 and Design, 

Installation and Maintenance 

Requirements for UST systems 

Outline

Draft

Mississippi 4 10/1/2008 Required for all new and 

replacement tanks/piping

100 percent, excluding 

connectors

Yes No

http://www.deq.state.ms.us/neww

eb/MDEQRegulations.nsf/3d9fe41d

a6b657cb86256d6e00638e7a/2b49

29acd771bdb286256ba5004842a3/

$FILE/UST-2.pdf

North Carolina 4 11/1/2007 Required for all new and 

replacement tanks/piping Not specified Yes Yes

http://www.wastenotnc.org/ust/D

ocs/FAQ_SecCon.pdf

http://www.oah.state.nc.us/rules/

TO 3003, TDD #13, EPAct State Decisions Page 2 of 10 July 24, 2009
Appendix A - Detailed State Requirements for Secondary Containment

State/Territory EPA 

Region

Regulation date Secondary containment 

requirement

Repair versus replace 

threshold

STP sumps 

required?

UDC for Motor 

Fuel Only?

Links Comments

South Carolina 4 5/23/2008

Required within 1,000 feet of 

CWS or potable well and within 

100 feet of an existing water 

supply well, coastal zone critical 

area, or state navigable waters

25 percent of piping within a 

12 month period requires full 

replacement.

No Yes

http://www.scdhec.net/environme

nt/lwm/regs/R.61-92_part280.pdf

Tennessee 4

6/19/2007 and 

7/24/2007

Required for all new and 

replacement tanks/piping

Repairs only allowed if 

approved by state. Otherwise 

all piping must be replaced.

Yes Yes

http://www.state.tn.us/environme

nt/ust/act&rules.shtml

http://tn.gov/sos/rules/1200/1200-

01/1200-01-15.20080930.pdf

Illinois 5 2/1/2008 Required for all new and 

replacement tanks/piping

20 feet or 50 percent of piping, 

whichever is less Yes No http://www.state.il.us/osfm/PetroChemSaf/home.htm

Indiana 5 1/10/2001

Amendment proposed to require 

secondary containment for all 

new and replacement 

tanks/piping

50 percent of piping No Yes

http://www.in.gov/legislative/iac/T

03290/A00090.PDF Information is from draft regulations.

Michigan 5 6/27/2008 Required for all new and 

replacement tanks/piping

50 percent of the length of any 

underground piping between 

the tank and the dispenser at 

any one time

No Yes

http://www.state.mi.us/orr/emi/a

dmincode.asp?AdminCode=Single

&Admin_Num=02902101&Dpt=EQ

&RngHigh=

Minnesota 5 3/24/2008 Required for all new and 

replacement tanks/piping

Single run of more than ten 

feet of piping; all piping from 

tank to dispenser if corrosion 

or a release is detected

Yes No

http://www.pca.state.mn.us/clean

up/ust.html

Ohio 5 3/1/2005 Required in defined "sensitive 

areas" Not specified No No UDC Rqt Yet

http://www.com.state.oh.us/SFM/f

ire_laws.aspx

http://www.com.state.oh.us/SFM/

bust/

A Sensitive Area is defined as one of the following: 1) 

Specified counties and aquifers; 2) Within 50 horizontal feet 

of a private water supply well (PWSW) or developed spring 

not located on the same site as the UST system; (3) The area 

is located within one of the following and is not located on 

the same site as the UST system: (a) 100 horizontal feet of a 

PWSW that has a net production rate of less than or equal to 

10,000 gallons per day; or (b) 200 horizontal feet of a PWSW 

that has a net production rate of greater than 10,000 gallons 

per day to less than or equal to 50,000; or (c) 300 horizontal 

feet of a PWSW that has a net production rate of greater 

than 50,000 gallons per day; (4) The area is located within a 

half-circle shaped area 1,000 feet upstream of a public 

supply surface water intake where the base line of the halfcircle is perpendicular to the at the intake and has a 

diameter of 2,000 feet, and where the midpoint of the base 

the intake, and where the radius of the half-circle is 1,000 

feet, unless the operator demonstrates to the bureau chief 

that the UST system is located or will be located surface 

water drainage area that is actually downstream of the 

intake; (5) The area is located within 200 horizontal feet of a 

lake or reservoir; or (6) The area is located within 100 

horizontal feet of a man-made underground tunnel or cavity 

used primarily for pedestrian traffic or passenger-carrying 

vehicles.

TO 3003, TDD #13, EPAct State Decisions Page 3 of 10 July 24, 2009
Appendix A - Detailed State Requirements for Secondary Containment

State/Territory EPA 

Region

Regulation date Secondary containment 

requirement

Repair versus replace 

threshold

STP sumps 

required?

UDC for Motor 

Fuel Only?

Links Comments

Wisconsin 5 11/1/2008 Required for all new and 

replacement tanks/piping 50 percent of existing systems Yes Yes

http://commerce.wi.gov/ERpdf/bst

/CommCodes10_5_2_48/ER-BSTComm10RevisionSignificantRetroComm10Revision.p

df

http://www.legis.state.wi.us/rsb/c

ode/comm/comm010.pdf

Arkansas 6 8/24/2007 Required within 1,000 feet of 

CWS or PDWW

Five feet of piping No Yes http://www.adeq.state.ar.us/regs/f

iles/reg12_final_071015.pdf

Louisiana 6 10/20/2008 Required for all new and 

replacement tanks/piping 25 percent of piping Yes No

http://www.deq.louisiana.gov/port

al/portals/0/planning/regs/pdf/UT

014fin.pdf

http://www.deq.louisiana.gov/port

al/LinkClick.aspx?fileticket=OYgEpE

OWyN8%3d&tabid=2659

New Mexico 6 4/1/2008 Required within 1,000 feet of 

CWS or PDWW

More than five feet within 

thirty days No No http://www.nmcpr.state.nm.us/nmac/_title20/T20C005.htm

Oklahoma 6 7/1/2008 Required for all new and 

replacement tanks/piping 20 feet of piping Yes No

http://www.occeweb.com/Division

s/PST/Forms/Rules/Chapter25.pdf

Texas 6 10/30/2008 Required for all new and 

replacement tanks/piping 20 percent of piping No No

http://www.tceq.state.tx.us/assets

/public/legal/rules/rules/pdflib/33

4c.pdf

Iowa 7 3/11/2009 Required within 1,000 feet of 

CWS or PDWW

Ten feet of piping Yes No

http://www.iowadnr.com/land/ust

/index.html

http://www2.legis.state.ia.us/aspx/

ACODocs/DOCS/567.135.pdf

Kansas 7 11/1/1990 Not available online Pre-approval required No Not Required http://www.kdheks.gov/tanks/regs

.html Chose to implement FR

Missouri 7 4/1/2004

State may specify specific 

conditions and circumstances 

under which a secondary 

containment system may be 

required.

Not specified No Not Required http://www.moga.mo.gov/statutes

/C300-399/3190000105.HTM Chose to implement FR

Nebraska 7 9/17/2007 Required for all new and 

replacement tanks/piping

Ten percent or ten feet of 

piping, whichever is less No Yes

http://www.sfm.state.ne.us/regula

tions/pdf/title159.pdf

Colorado 8 8/1/2008 Required for all new and 

replacement tanks/piping

50 percent or 50 feet of piping, 

whichever is less Yes Yes

http://oil.cdle.state.co.us/Div%20p

rograms/Regs/Colorado%20Revise

d%20UST%20Regs%20Aug08.pdf

If interstitial monitoring is the sole method of release 

detection for the UST system, sump sensors shall be installed 

and each sensor shall be tested for functionality by manual 

tripping on an annual basis.

Montana 8 12/31/2008 Required for all new and 

replacement tanks/piping

50 percent of the product 

piping length or a pressurized 

product pipe

Yes No

http://www.deq.state.mt.us/UST/u

stRules.asp

Requires monthly documentation of sensor-console 

communication.

North Dakota 8 1/1/2009 Required within 1,000 feet of 

CWS or PDWW

Ten feet of piping Yes No

http://www.ndhealth.gov/WM/Un

dergroundStorageTankProgram/Un

dergroundStorageTankProgram.ht

m

http://www.legis.nd.gov/informati

on/acdata/pdf/33-24-08.pdf

TO 3003, TDD #13, EPAct State Decisions Page 4 of 10 July 24, 2009
Appendix A - Detailed State Requirements for Secondary Containment

State/Territory EPA 

Region

Regulation date Secondary containment 

requirement

Repair versus replace 

threshold

STP sumps 

required?

UDC for Motor 

Fuel Only?

Links Comments

South Dakota 8 1/1/2009 Required within 1,000 feet of 

CWS or PDWW

25 feet of piping No No http://legis.state.sd.us/rules/Display

Rule.aspx?Rule=74%3A56%3A01 Secondary containment required for emergency generators.

Utah 8 11/18/2008 Required within 1,000 feet of 

CWS or PDWW

If less than 100 percent of the 

piping from a tank to a 

dispenser is replaced, the 

requirements shall apply to all 

new product piping that is 

installed

Yes Yes

http://www.undergroundtanks.uta

h.gov/docs/R311new0808.pdf

Wyoming 8 11/10/2008 Required for all new and 

replacement tanks/piping

All new and replacement 

installations and repairs of 

existing piping must have 

secondary containment

No No

http://deq.state.wy.us/shwd/stp/S

TPDownloads/Chapter_17.pdf

http://deq.state.wy.us/shwd/STP/S

TPDownloads/Guidance/Guidance

_4.pdf

American Samoa 9 No date given Required for all new and 

replacement tanks/piping Not specified No No UDC Rqt Yet http://www.asbar.org/Regs/asac24_07.htm

Arizona 9 5/20/2008 Required for all new and 

replacement tanks/piping 25 percent of piping No Yes

http://www.azleg.state.az.us/Form

atDocument.asp?inDoc=/ars/49/01

009.htm&Title=49&DocType=ARS

California 9 1/17/2008 Required for all new and 

replacement tanks/piping Not specified No No

http://www.swrcb.ca.gov/water_issu

es/programs/ust/regulatory/docs/ccr

_title23_2008.pdf

Commonwealth of 

Northern Mariana 

Islands

9 No date given Not specified Not specified No No UDC Rqt Yet http://deq.gov.mp/artdoc/Sec7art

45ID101.pdf

Guam 9 12/1/2006 Not specified Not specified No No UDC Rqt Yet

Hawaii 9 2/1/2000 Required for all new and 

replacement tanks/piping Not specified No No UDC Rqt Yet http://hawaii.gov/health/environmental/waste/ust/rules.html

Nevada 9 4/17/2008 Required within 1,000 feet of 

CWS or PDWW

100 percent No Yes

http://www.ndep.nv.gov/BCA/UST

_HOME.HTM

Regulations regarding Delivery Prohibition and Secondary 

Containment became effective April 17, 2008 and are being 

enforced as of July 1, 2008. 

The regulations are not clear regarding whether connectors 

are excluded from the repair/replace threshold.

Alaska 10 10/1/2006

May be required if a sole-source 

aquifer exists and the 

department determines that 

secondary

containment is necessary to 

protect human health and safety, 

and the environment.

Not specified No No (Draft) http://www.dec.state.ak.us/REGUL

ATIONS/pdfs/18%20AAC%2078.pdf

AK Draft regulations require UDC for all new petroleum 

dispensers

Idaho 10 2/27/2007 Required within 1,000 feet of 

CWS or PDWW

Repairs allowed up to 100 

percent, excluding connectors No Yes

http://www.deq.state.id.us/waste/

prog_issues/ust_lust/index.cfm#re

gs

Oregon 10 3/10/2008 Required for all new and 

replacement tanks/piping

Each contiguous stretch of 

piping

No Yes

http://www.deq.state.or.us/lq/pub

s/docs/tanks/GuidanceReplacemen

tUndergroundPiping.pdf

OR uses the term Fuel dispenser - I assumed this to mean 

motor fuel

Washington 10 7/1/1998 Amendment in progress Not specified No No UDC Rqt Yet

http://www.ecy.wa.gov/lawsrules/activity/wac173360.html

Green Text means 

Updated by OUST

TO 3003, TDD #13, EPAct State Decisions Page 5 of 10 July 24, 2009
Appendix B - State Requirements for Sump Testing, Interstitial Integrity Testing, and Interstitial Monitoring Frequency Required? Test frequency Test options Required? Frequency Required? Test frequency Required? Test frequency Test options

Connecticut 1 No NA NA No No No NA NA Continuous

http://www.ct.gov/dep/cwp/view.a

sp?a=2692&q=322594&depNav_GI

D=1652

http://www.cga.ct.gov/2005/pub/C

hap446k.htm#Sec22a-449o.htm

Excludes residential USTs

Maine 1 No NA NA No No No NA NA Continuous http://maine.gov/dep/rwm/ust/stat

utesrules.htm

All piping sumps including 

dispenser sumps and pans shall 

be provided with continuous leak 

detection monitoring. 

Massachusetts 1 No NA NA Yes Monthly No No NA NA Continuous

http://www.mass.gov/Eeops/docs/

dfs/osfm/cmr/cmr_secured/527009

.pdf

All sumps must monitor 

continuously for product loss

Vermont 1 No NA NA Yes Monthly No No NA NA Weekly

http://www.anr.state.vt.us/dec/was

tediv/ust/ust_regs.htm

http://www.anr.state.vt.us/dec/was

tediv/ust/pubs/USTTalk_Winter_09.

pdf

New Hampshire 1 Yes

Within 30 days of 

installation

Manufacturer 

guidelines, 

hydrostatic, or 

pneumatic

Yes Monthly (draft) No

Within 30 days of 

installation No NA NA Continuous

http://des.nh.gov/organization/com

missioner/legal/rules/documents/e

nv-wm1400.pdf

Rhode Island 1 No NA NA Yes

2 Years (ERP 

Program) No Yes

A test for tightness 

on the interstitial 

space between the 

tank’s walls when 

the tank has been 

installed for a period 

of twenty years, and 

once every two 

years thereafter

Tightness Monthly http://www.dem.ri.gov/pubs/regs/r

egs/waste/ustreg07.pdf

New York 2 No NA NA Yes Monthly No No NA NA Weekly http://www.dec.ny.gov/regs/4432.h

tml#15935

Puerto Rico 2 No NA NA No No No NA NA Monthly

http://www.gobierno.pr/NR/rdonly

res/667951D6-B109-4D68-B8CC85FC783D170B/0/ControlTanquesS

oterrados.pdf

Virgin Islands 2 No NA NA No No No NA NA Monthly http://www.dpnr.gov.vi/dep/tanks.

htm

New Jersey 2 Yes

Within 30 days of 

installation Visual Yes 30 days No No NA NA Monthly http://www.nj.gov/dep/srp/regs/ust/ustrule.pdf

Pennsylvania 3 Yes

At installation, repair, 

or replacement

Manufacturer 

guidelines or 

PEI RP-100

No No

At installation, repair, 

or replacement No NA NA Monthly

http://www.pacode.com/secure/da

ta/025/chapter245/chap245toc.htm

l

http://www.pacode.com/secure/da

ta/025/chapter245/chap245toc.htm

l

Maryland 3 Yes

Installation, repair, and 

every five years Not specified No Yes

Installation, repair, 

and annually No NA NA Monthly

http://www.mde.state.md.us/asset

s/document/OilControl/Oil_Pollutio

n_Tank%20Man_Reg26.10.pdf

State/Territory EPA 

Region Comments

Periodic Spill Bucket Tests Interstitial integrity testing

Continuous or 

monthly interstitial 

monitoring?

Links

Sump testing Walkthrough Checks

TO 3003, TDD #13, EPAct State Decisions Page 6 of 10 July 24, 2009
Appendix B - State Requirements for Sump Testing, Interstitial Integrity Testing, and Interstitial Monitoring Frequency Required? Test frequency Test options Required? Frequency Required? Test frequency Required? Test frequency Test options

State/Territory EPA 

Region Comments

Periodic Spill Bucket Tests Interstitial integrity testing

Continuous or 

monthly interstitial 

monitoring?

Links

Sump testing Walkthrough Checks

District of 

Columbia

3 No NA NA No No No NA NA Monthly

http://dchealth.dc.gov/DOH/frames

.asp?doc=/doh/lib/doh/services/ad

ministration_offices/environmental

/services2/ustd/pdf/allreg1.pdf&gro

up=1813

Virginia 3 No NA NA No No No NA NA Monthly http://www.deq.virginia.gov/tanks/

secpro.html

West Virginia 3 Yes

At Installation and 

every 3 yrs thereafter NA No No Yes

At Installation and 

every 3 yrs 

thereafter

NA Monthly http://www.wvdep.org/item.cfm?

ssid=13&ss1id=978

Information is in a guidance 

document

Delaware 3 Yes Annually Manufacturer 

guidelines No Yes 12 Months Yes Annually Manufacturer guidelines Monthly

http://regulations.delaware.gov/Ad

minCode/title7/1000/1300/1351.pd

f

Alabama 4 Yes Annually Visual No Yes Annually No NA NA Monthly

http://www.adem.state.al.us/Regul

ations/Div6b/Div6VolIIeff42508.pdf

http://www.adem.state.al.us/Wate

rDivision/Ground/UST%20GW/Seco

ndContainFAQ.pdf

Georgia 4 Yes Annually Visual No No No NA NA Monthly http://rules.sos.state.ga.us/docs/39

1/3/15/07.pdf

Interstitial electronic monitoring 

system must be tested annually 

in accordance with the 

manufacturer’s specifications to 

verify the accuracy of its 

operations.

Kentucky 4 Yes At Least Every 3 years

Hydrostatic, 

vacuum or 

other 

manufacturer 

approved 

integrity test

No Yes 3 yrs Yes Installation Per Mfrs 

Instructions

Continuous

See 401 KAR 42:020 and Design, 

Installation and Maintenance 

Requirements for UST systems 

Outline

Draft

Tennessee 4 Yes

Quarterly visual 

inspections of 

dispenser and underdispenser containment 

sumps

Visual Yes

Monthly (spill 

buckets), Quarterly 

(dispenserss)

No No NA NA Monthly

http://www.state.tn.us/environmen

t/ust/act&rules.shtml

http://tn.gov/sos/rules/1200/1200-

01/1200-01-15.20080930.pdf

Florida 4 Yes

Below-grade piping 

sumps by January 1, 

2012, and every three 

years thereafter; 

below-grade dispenser 

sumps by January 1, 

2012, and every three 

years thereafter; 

spill containment 

systems within one 

year of (the effective 

date of the rule) and at 

intervals not exceeding 

every 12 months 

thereafter

Not specified No Yes 12 Months Yes

The interstice of 

double-wall piping 

with a maximum 

nominal diameter of 

five inches or less by 

January 1, 2012, and 

every three years 

thereafter

Not specified Monthly http://www.dep.state.fl.us/legal/Rule

s/waste/62-761.pdf

TO 3003, TDD #13, EPAct State Decisions Page 7 of 10 July 24, 2009
Appendix B - State Requirements for Sump Testing, Interstitial Integrity Testing, and Interstitial Monitoring Frequency Required? Test frequency Test options Required? Frequency Required? Test frequency Required? Test frequency Test options

State/Territory EPA 

Region Comments

Periodic Spill Bucket Tests Interstitial integrity testing

Continuous or 

monthly interstitial 

monitoring?

Links

Sump testing Walkthrough Checks

North Carolina 4

Yes, if not 

continuou

sly 

monitored 

with a 

sensor

Every three years

Tightness test;

annual visual 

inspection

No Yes 3 years Yes

Every three years;

annual functionality 

test

Not specified Continuous

http://www.wastenotnc.org/ust/Do

cs/FAQ_SecCon.pdf

http://www.oah.state.nc.us/rules/

South Carolina 4 No NA NA Yes Monthly No Yes At installation Pneumatic or 

hydrostatic Monthly http://www.scdhec.net/environment/lwm/regs/R.61-92_part280.pdf

Mississippi 4 Yes Annually

Visual; if there 

has been a 

failure then a 

manufacturer's 

test must be 

performed.

No Yes 12 Months

Yes, if not 

continuou

s

Annually

Visual; if there 

has been a 

failure then a 

manufacturer's 

test must be 

performed.

Monthly

http://www.deq.state.ms.us/neww

eb/MDEQRegulations.nsf/3d9fe41d

a6b657cb86256d6e00638e7a/2b49

29acd771bdb286256ba5004842a3/

$FILE/UST-2.pdf

Indiana 5 No NA NA No No No NA NA Monthly http://www.in.gov/legislative/iac/T

03290/A00090.PDF

Michigan 5 No NA NA No No No NA NA Monthly

http://www.state.mi.us/orr/emi/ad

mincode.asp?AdminCode=Single&A

dmin_Num=02902101&Dpt=EQ&Rn

gHigh=

Ohio 5 Yes

Annual visual 

inspection; every three 

years

Visual; 

tightness test Yes

Varies, but typically 

Annual (varies 

because spill 

buckets need to be 

checked before 

each delivery)

No

Annual visual 

inspection, but no 

testing

Yes Annually Manufacturer 

guidance Monthly

http://www.com.state.oh.us/SFM/fi

re_laws.aspx

http://www.com.state.oh.us/SFM/b

ust/

Illinois 5 Yes At installation Hydrostatic No No Installation Only Yes

Every three years to 

verify its operation Not specified Monthly http://www.state.il.us/osfm/PetroChemSaf/home.htm

Wisconsin 5 Yes At installation Hydrostatic Yes

According to PEI 

RP900 (daily, 

weekly, monthly, 

and annually)

No Yes At installation Volumetric or 

non-volumetric Monthly

http://commerce.wi.gov/ERpdf/bst/

CommCodes10_5_2_48/ER-BSTComm10RevisionSignificantRetroComm10Revision.p

df

http://www.legis.state.wi.us/rsb/co

de/comm/comm010.pdf

Minnesota 5 Yes

Monthly; annually with 

a submersible pump 

sump with liquid-tight 

containment and a 

liquid sensor alarm

Visual Yes Monthly No Yes

Monthly; annually 

with sensor Visual Monthly http://www.pca.state.mn.us/cleanup/ust.html

New Mexico 6 Yes At installation Hydrostatic Yes Monthly No No NA NA Monthly http://www.nmcpr.state.nm.us/nm

ac/_title20/T20C005.htm

Arkansas 6 No NA NA No No No NA NA Monthly http://www.adeq.state.ar.us/regs/fi

les/reg12_final_071015.pdf

Louisiana 6 No NA NA No No No NA NA Monthly

http://www.deq.louisiana.gov/port

al/portals/0/planning/regs/pdf/UT0

14fin.pdf

http://www.deq.louisiana.gov/port

al/tabid/2659/Default.aspx

Oklahoma 6 No NA NA No No No NA NA Monthly http://www.occeweb.com/Divisions

/PST/Forms/Rules/Chapter25.pdf

TO 3003, TDD #13, EPAct State Decisions Page 8 of 10 July 24, 2009
Appendix B - State Requirements for Sump Testing, Interstitial Integrity Testing, and Interstitial Monitoring Frequency Required? Test frequency Test options Required? Frequency Required? Test frequency Required? Test frequency Test options

State/Territory EPA 

Region Comments

Periodic Spill Bucket Tests Interstitial integrity testing

Continuous or 

monthly interstitial 

monitoring?

Links

Sump testing Walkthrough Checks

Texas 6 Yes Every 60 days Visual Yes 60 days No Yes At installation Soap test Monthly

http://www.tceq.state.tx.us/assets/

public/legal/rules/rules/pdflib/334c

.pdf

Kansas 7 No NA NA No No No NA NA Monthly http://www.kdheks.gov/tanks/regs.

html

Missouri 7 No NA NA No No No NA NA Monthly http://www.moga.mo.gov/statutes/

C300-399/3190000105.HTM

Nebraska 7 No NA NA No No No NA NA Monthly http://www.sfm.state.ne.us/regulat

ions/pdf/title159.pdf

Iowa 7 Yes Every two years Visual No No Yes Every two years Not specified Monthly

http://www.iowadnr.com/land/ust/

index.html

http://www2.legis.state.ia.us/aspx/

ACODocs/DOCS/567.135.pdf

North Dakota 8 Yes Annually Visual No No No NA NA Monthly

http://www.ndhealth.gov/WM/Und

ergroundStorageTankProgram/Und

ergroundStorageTankProgram.htm

http://www.legis.nd.gov/informatio

n/acdata/pdf/33-24-08.pdf

Utah 8

Yes, if a 

sensor is 

used

Annually Manufacturer 

guidelines Yes 30 days (draft) No No NA NA Monthly http://www.undergroundtanks.utah.gov/docs/R311new0808.pdf

Wyoming 8 Yes

Monthly;

annual sensor test;

double wall piping 

sumps shall be 

inspected quarterly. If 

there is any alarm 

condition on any 

double wall system, 

the appropriate 

sump(s) must be 

opened, inspected, 

and cleaned if 

necessary. 

Visual Yes Annual No No NA NA Monthly

http://deq.state.wy.us/shwd/stp/ST

PDownloads/Chapter_17.pdf

http://deq.state.wy.us/shwd/STP/S

TPDownloads/Guidance/Guidance_

4.pdf

Colorado 8 No NA NA Yes Monthly No Installation No NA NA Monthly

http://oil.cdle.state.co.us/Div%20pr

ograms/Regs/Colorado%20Revised

%20UST%20Regs%20Aug08.pdf

If interstitial monitoring is the 

sole method of release detection 

for the UST system, sump sensors 

shall be installed and each sensor 

shall be tested for functionality 

by manual tripping on an annual 

basis.

Montana 8 No NA NA No No No NA NA Continuous

http://www.deq.state.mt.us/UST/us

tRules.asp

Requires monthly documentation 

of sensor-console communication

South Dakota 8 No NA NA No No No NA NA Monthly http://www.state.sd.us/denr/des/gr

ound/tanks/TankRuleschange.htm

Secondary containment required 

for emergency generators

American Samoa 9 No NA NA No No No NA NA Monthly http://www.asbar.org/Regs/asac24

_07.htm

Arizona 9 No NA NA No No No NA NA Monthly

http://www.azleg.state.az.us/Form

atDocument.asp?inDoc=/ars/49/01

009.htm&Title=49&DocType=ARS

TO 3003, TDD #13, EPAct State Decisions Page 9 of 10 July 24, 2009
Appendix B - State Requirements for Sump Testing, Interstitial Integrity Testing, and Interstitial Monitoring Frequency Required? Test frequency Test options Required? Frequency Required? Test frequency Required? Test frequency Test options

State/Territory EPA 

Region Comments

Periodic Spill Bucket Tests Interstitial integrity testing

Continuous or 

monthly interstitial 

monitoring?

Links

Sump testing Walkthrough Checks

Commonwealth of 

Northern Mariana 

Islands

9 No NA NA No No No NA NA Monthly http://deq.gov.mp/artdoc/Sec7art4

5ID101.pdf

Guam 9 No NA NA No No No NA NA Monthly

Hawaii 9 No NA NA No No No NA NA Monthly http://hawaii.gov/health/environm

ental/waste/ust/rules.html

Nevada 9 No NA NA No No No NA NA Monthly http://www.ndep.nv.gov/BCA/UST_

HOME.HTM

Nevada has two new UST 

Regulations regarding Delivery 

Prohibition and Secondary 

Containment. Although these 

regulations will not be codified 

until sometime later this year, 

they became effective April 17, 

2008 and are being enforced as 

of July 1, 2008. 

California 9 No NA NA Yes Monthly Yes Annual Yes

Installation, six 

months postinstallation, and 

every 36 months

Manufacturer 

guidelines Continuous

http://www.swrcb.ca.gov/water_iss

ues/programs/ust/regulatory/docs/

ccr_title23_2008.pdf

Alaska 10 No NA NA No No No NA NA Monthly http://www.dec.state.ak.us/REGUL

ATIONS/pdfs/18%20AAC%2078.pdf

Idaho 10 No NA NA No No No NA NA Monthly

http://www.deq.state.id.us/waste/

prog_issues/ust_lust/index.cfm#reg

s

Oregon 10 No NA NA No No No NA NA Monthly

http://www.deq.state.or.us/lq/pubs

/docs/tanks/GuidanceReplacement

UndergroundPiping.pdf

Washington 10 No NA NA No No No NA NA Monthly http://www.ecy.wa.gov/lawsrules/activity/wac173360.html

TO 3003, TDD #13, EPAct State Decisions Page 10 of 10 July 24, 2009