Lessons LearnedFrom BMP Inspections(Good Tips and Ideas)

February 21, 2017

Feb 2017 1

* Quick review

* Looking at Trends or “habits”- typical residential type project site(s)(2 examples)

- good field solutions

AGENDA

- good field solutions

* Good and Bad Scenarios- better field solutions

* City requirement(s)

Feb 20172

Quick Review – Industry standard

Feb 2017 3

Qualified not defined

What is a BMP?

BMP stands for Best Management Practices.

In layman terms, it means covering your stockpile, it’spicking up your rubbish, installing a bio-sock at acatch basin, installing a silt fence, etc…. It alsoincludes educating people so they do not causeincludes educating people so they do not causepollution into our drainage systems, streams, andoceans.

Bottom line……….

DO THE RIGHT THING

TO TAKE CARE OF THE ENVIRONMENT

Feb 2015 5

(It’s better for everyone, including yourself in moreways than one !!!)

The Bigger Picture

Happened in Maui

Feb 2017 6

http://pubs.usgs.gov/fs/2002/fs025-02/

Analyzing Projects(Think about what BMPs you need to be in compliance)

Feb 2015 7

Project 1: Residential home built on a slope(hillside)

Feb 2015 8

Disturbed slope / loose exposed soil

Loose constructiondebris

Feb 2015 9

Issues noticed here at this site

Unsecured Port-a-Potty

No oil pan or liner

Project 1: Continue

Feb 2015 10

Storm Drain Catch Basin

Options for Project 1

Added a barrier BMP

Feb 2015 11

Continue Scenario 1

Feb 2015 12

Added a second BMP (layered)

Q: What else can be done to make project more compliant?

Other optionsCovered slopes

Feb 2015 13Covered stockpile

Secured port-a-potty

Project 2 – Small subdivision built on a slope

Catch basin located down stream from project

Feb 2015 14

-Sediment build up andBMP not maintained

-Roadway un-swept

Continue Project 2: After a rain event

What’s happening here?

Ponding

Feb 2015 15

Mud

Ponding + Mud = Safety Hazard + Polluted Discharge = Critical Deficiency

Continue Project 2 – Major or Minor Discrepancies

•UnsecuredPort-a-potty

•Unprotecteddisturbed soil

•Loose debris

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Continue Scenario 2 – Critical Discrepancies

Unprotected stockpiles

Unprotected slopes

Feb 2015 17

Continue: Project 2 – Marginal Discrepancies

Exposed materialsWorn down BMPs

Feb 2015 18

Vehicle Management

Solutions for Project 2

Roadway swept (wheretracking starts and ended)

Feb 2015 19

Cleaned in front of catch basinand installed a new BMP

Options for Project 2

Feb 2015 20

• Installed a doubleBMP at front of project

• Swept roadway

Project 2: Good Housekeeping Practices

Feb 2015 21

• Area cleaned• Port-a-potty relocated• Ground covered

Project 2: Stabilized Ground and Slope Stability

Feb 2015 22

• Slope covered

• Ground covered

Project 2: Other Good Practices Onsite

Feb 2015 23

• Covered Stockpile

• Plastic Liner andground cover

• Secured Port-a-potty

Scenarios at Project Siteswith Common

Issues

(Here are some Better Options)

Feb 2015 24

Concrete Wash Out Issues

Feb 2015 25

• Overflow spills caused by- overfilling- missing containment- splattering out- leaking chute

• Washing down hand mixer anddumping wash water on the ground

• Washing tools• Emptying extender hoses or pipes

from pumper trucks

DO NOT LET CONCRETE WASH GO TO GROUND

Good Options for Concrete Wash Outs• Use a liner underbins to catch/containspills

• Cover bin in case of anunforeseen rain event

(or remove from site)• Remember to clean upany drops or spills onthe ground

Feb 2015 26

Continue: Good (front), Bad (back)

Feb 2015 27

Stockpiling Issues• No barrier type(sediment control)BMP to contain material

• No covering, materialwashing away

Feb 2015 28

• Bad location- not staged on the property; located in public-right- of-way

- placed too close to storm drain/storm drain system

Good Stockpiling Options

Materials on property

Feb 2015 29

Cover with dust screen

Options for Stockpiles

Cover with Tarp

Double barrier BMP

Feb 2015 30

Cover with Tarp

Useful Tips

• when possible, place stockpiles in vegetated area on property

• if stockpile is placed on a slope, should put a barrier BMP at thetoe or low side of the stockpile

Good Silt Fence Installation

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Options for Slope Protection1) Plastic covering for erosion

control.

2) Silt fence trenched in at toe ofslope for sediment control

Feb 2015 32

1) Burlap cover (matting) forerosion control .

2) Silt fence trenched in at toe ofslope for sediment control

Issues with Excavated, Disturbed orUn-stabilized Landscaped areas

Feb 2015 33

Continue: Issues with Excavated, Disturbedor Un-stabilized Landscaped areas

No BMP installed tocontain material onthe property.

Feb 2015 34

Gutter buddy atcatch basin isthe ONLY BMP

being used

Issues when BMPs not adjusted

• No j-hook at the end ofthe sock, discharge todrainage system

• No proper overlap

Feb 2015 35

Sediment in publicright-of-way

causing a safetyhazard

Other Issues

Wrong type(s) of BMP

Feb 2015 36

Good Options for Disturbed Areas

Mulch tubeused as abarrier forsedimentcontrol

Silt Screenused as abarrier forsedimentcontrol

Feb 2015 37

J-hook atends

Good Egress Options

Feb 2015 38

Portable Toilets

Feb 2015 39

• Unsecured• Located near a water

body

Equipment Parking

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Equipment Parking

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Project 3: Near a State Water Body

What’s needed at minimum?• Double sediment barrier

Additional items?

Feb 2015 42

City Requirements, where does it saythat?

Feb 2015 43

BMP checklist for smallprojects

Permits

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Grading Notes

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Stockpiling Notes

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Grubbing Notes

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Where To Find These?

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For Site Development Notes

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For Building Permitted Sites

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Websites

http://www.honoluludpp.org/ApplicationsForms.aspx

http://www.honoluludpp.org/ApplicationsForms/SiteEngineeringandSubdivisionPermits.aspx/SiteEngineeringandSubdivisionPermits.aspx

http://www.honoluludpp.org/ApplicationsForms/BuildingPermits.aspx

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SUMMARY1) PLAN OUT YOUR BMPS - THINK ABOUT THE TYPE(S)

OF BMPS TO USE FOR YOUR TASK* RECOMMENDATION: TAKE A PICTURE AND TALK TO

A SUPPLIER TO HELP YOU PICK THE BEST BMPFOR YOUR TASK AND SCENARIO.

(* BE CREATIVE AND USE WHAT YOU HAVE ONSITE)

2) REMEMBER KEEPING YOUR SITE CLEAN (AND SAFE)IS AN ON GOING PROCESS; IT IS NOT JUST A “ONE

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IS AN ON GOING PROCESS; IT IS NOT JUST A “ONETIME DEAL”. NEED TO DO REGULAR INSPECTIONSAND ADJUSTMENTS (AND IN SOME CASESDOCUMENT) REMEMBER, BMPS NEED REGULARMONITORING, ASSESSMENT, MAINTENANCE, &UPDATING.

3) REMEMBER THAT YOU’RE PART OF THE BIGGERPICTURE. What you do can effect everyone……..soDO THE RIGHT THING. Thank you.