Post Construction BMPs Checklist

Use of Checklist
This checklist is provided to DPW staff as a reference to the Interim Guidelines for post-construction BMPs. It is not intended to provide the same level of detailed guidance as the Interim Guidelines, or to replace that document. In cases of disagreement, the Interim Guidelines shall prevail in all cases. Section references are given as a quick index for general application, but staff is instructed to be aware that other sections may also apply in a given situation.



PART ONE - Purpose & Applicability

Page 2


Will the completed project discharge stormwater?

sec 1.1.1


Does the project still require CEQA review, or a County discretionary approval?

sec 1.1.2


Is the project within the CWA boundary, an Urban Island, or constitute an "urban development"?

sec 1.1.2


Which categories of requirements are applicable to this project?

Ø All covered projects – Parts Two, Three, Five, Six

Ø Priority Development or "SUSMP" Projects – All Parts




PART TWO – Environmental Performance Standards

Page 5


Flow Control and Erosion Prevention 2.1



Will post-construction volume or velocity cause increased or significantly increased downstream erosion?

sec 2.1.1-2


Will project significantly disrupt flows supporting downstream wetland or habitat?

sec 2.1.3


Water Quality Protection 2.2



Will the runoff cause/contribute to an exceedance of receiving water quality objectives, or to a condition of pollution, contamination, or nuisance?

sec 2.2.1

sec 2.2.4


Will the runoff significantly degrade receiving water quality?

sec 2.2.2


Have pollutants in stormwater been reduced to the maximum extent practicable?

sec 2.2.3


Groundwater Quality Protection 2.3



Is the infiltration of runoff to ground water controlled to avoid polluting groundwater?

sec. 2.3.1-2


PART THREE – Design and BMP Requirements For All Projects

Page 8


Are the proposed post-construction BMPs appropriate to limit pollution in run-off from the site to the maximum extent practicable (MEP)?

Sec 3.1.1


Are proposed BMPs appropriate based upon project site factors?

sec 3.1.2


Are proposed BMPs appropriate based upon the pollutant potential of the project?

sec 3.1.3


Are proposed BMPs appropriate based upon cost, including maintenance costs?

sec 3.1.4


Are proposed BMPs appropriate based upon the watershed area of the project ?

sec 3.1.5


Are proposed BMPs appropriate based upon the environmental impacts of pollution protection ?

sec 3.1.6


Performance Requirement for BMPs in Combination 3.2



Are post-construction BMPs in combination effective to limit increases in run-off and discharges of pollutants from the site to the maximum extent practicable?

Sec 3.2.1


Preference for Natural BMPs 3.3



Are natural BMPs used wherever practicable?

sec 3.3.1


Source Control BMPs 3.4



Have pollutants been properly identified ?

sec 3.4.1


Are proper "source control" BMPs used to reduce pollution in runoff to the MEP?

sec 3.4.1


How will slopes and channels be protected from eroding to the MEP?

sec 3.4.2


Are outdoor materials/trash storage areas properly designed?

sec 3.4.3

  Minimize Impervious Surfaces 3.5  


Does the project use landscaping to increase infiltration, retention, and slow runoff where feasible?

sec 3.5.1


Does the project site design maximize infiltration and retention, and minimize impervious surfaces?

sec 3.5.1


Buffer Zones 3.6



Does the project use buffer zones or other buffers for natural water bodies ?

sec 3.6.1-2

  Conserve Natural Areas 3.7  


Does the project conserve natural areas where practicable?

sec 3.7.1


Storm drain tiles and signage 3.8



Are storm drain inlet tiles and signage included in the project?

sec 3.8.1


Additional BMPs where necessary 3.9



Are additional BMPs needed for the project to meet performance standards?

sec 3.9.1


Infiltration BMPs 3.10



Is the infiltration of runoff to ground water controlled to avoid polluting groundwater?

Sec 2.3.2-3


PART FOUR – Additional Design and BMP Requirements for Priority Dev. Projects

Page 21


Is the project a Priority Development of "SUSMP" project?

Sec 4.1


Are appropriate structural treatment BMPs included to remove pollutants of concern ?

sec 4.2.1


Will structural treatment BMPs be installed and operating before discharging post-construction runoff ?

sec 4.2.2


Are structural treatment BMPs located and sized to infiltrate, filter, or treat the runoff volume or flow indicated on County isopluvial map prepared for this purpose?

sec 4.2.3


Is use of infiltration BMPs limited by site factors?

sec 4.2.4


PART FIVE – Other Requirements

Page 24


Discharge prohibitions 5.1



Will the project cause prohibited discharges of non-storm water?

Sec. 5.1


Construction-Phase requirements 5.2



How will this project protect storm water during construction ?

sec 5.2.1


Industrial Facility General Permit Coverage 5.3



Does this project require an industrial storm water permit?

sec 5.3.1


BMP Maintenance 5.4



How will this project ensure ongoing BMP maintenance?

sec 5.4.1


PART SIX – Offsite Alternatives

Page 27


Is a shared structural treatment BMP proposed or appropriate for the project?

Sec 6.1


Is a waiver of structural treatment BMP requirements proposed for this project?

Sec. 6.2


Flood Control