Construction Storm Water Construction Storm Water Storm W ater - - PDF document

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 1

Construction Storm Water Construction Storm Water Pre Pre-

• Wet Season

Wet Season Workshop Workshop

2007 2007

California Regional W ater Quality California Regional W ater Quality Control Board Control Board Central Valley Region, Sacram ento Central Valley Region, Sacram ento Office Office Storm W ater Construction Coordinator Storm W ater Construction Coordinator Construction Perm it Com pliance: Construction Perm it Com pliance: Stanislaus, Tuolum ne, Am ador, Stanislaus, Tuolum ne, Am ador, Calaveras, Sutter, Yuba, Colusa Calaveras, Sutter, Yuba, Colusa Rich Rich Muhl Muhl ( 9 1 6 ) 4 6 4 ( 9 1 6 ) 4 6 4 -

• 4 7 4 9

4 7 4 9

rm uhl@w aterboards.ca.gov rm uhl@w aterboards.ca.gov

Key topics to be addressed: Key topics to be addressed:

• Perm it Requirem ents

Perm it Requirem ents

• Enforcem ent

Enforcem ent

• Em erging I ssues

Em erging I ssues

• W ater Board Expectations

W ater Board Expectations

• Top 2 0 problem s observed last year

Top 2 0 problem s observed last year

• Entrapm ent

Entrapm ent

• Hard Arm or

Hard Arm or vs vs Soft Arm or Soft Arm or

RWQCB Expectations

Construction Projects – Minimize Water Quality Impacts From Land Development

• All Construction Sites > 1 acres
• Must Have An NPDES Permit: NOI
• SWPPP (Living Document, Dynamic and

Defensible);

• Implementation of Effective Pollution Prevention

BMPs

• Monitor the site

CALIFORNIA REGIONAL CALIFORNIA REGIONAL WATER BOARD WATER BOARD PROGRESSIVE PROGRESSIVE ENFORCEMENT TOOLS ENFORCEMENT TOOLS

Informal Informal Enforcement Enforcement

• Verbal Warning

Verbal Warning

• Staff Enforcement

Staff Enforcement Letter Letter

• Notice of Violation

Notice of Violation The Regional Board has a number of ways it can respond to stormwater violations

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 2

Formal Formal Enforcement Enforcement

• Cleanup and Abatement Order

Cleanup and Abatement Order

• Administrative Civil Liability (ACL)

Administrative Civil Liability (ACL)

• Joint enforcement with Department of

Joint enforcement with Department of Fish and Game and U.S. EPA Fish and Game and U.S. EPA

• Referral to District Attorney,

Referral to District Attorney, Environmental Circuit Prosecutor, or Environmental Circuit Prosecutor, or Attorney General Attorney General

State Administrative Penalties State Administrative Penalties

Maximum Penalties are $10,000 Maximum Penalties are $10,000 per day, plus $10/ gallon of per day, plus $10/ gallon of sediment sediment -

• laden or polluted water

laden or polluted water discharged for each violation discharged for each violation

Minim um Am ount is the Minim um Am ount is the econom ic savings of the Violation econom ic savings of the Violation

REGION 5 REGION 5 RECENT STORM WATER RECENT STORM WATER ACLS/ ENFORCEMENT ACLS/ ENFORCEMENT

DISCHARGER ACL COUNTY

French Bar Bluffs $1,100,000 Stanislaus

(Joint Agency Enforcement / $175,000 stipulated Judgement)

PL Roseville (West Park) $700,000 Placer Roseville Fiddment LLC $600,000 Placer JMC Homes $350,000 Placer DR Horton $200,000 Solano CRV Enterprises Inc. $150,000 Calaveras

(Board raised to $225,000)

Tehama Market Assoc. $150,000 Tehama

(Board raised to $250,000)

Lemke Construction $25,000 Calaveras

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 3

Emerging Issues Emerging Issues

(AKA (AKA “ “Things to Look Out For Things to Look Out For” ”) )

• Revised Permit

Revised Permit

TOP 2 0 Problem s TOP 2 0 Problem s Observed Observed On Construction Sites On Construction Sites

Lack of an Effective Combination of Lack of an Effective Combination of Erosion and Sediment Control Erosion and Sediment Control BMPs BMPs

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 4

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 5

Erosion Control is the Erosion Control is the Key to Effective Storm Key to Effective Storm W ater Managem ent W ater Managem ent

The First Order of Business The First Order of Business

Preserve existing vegetation Preserve existing vegetation

Existing vegetation has Existing vegetation has already stabilized the area already stabilized the area it is growing in, to some it is growing in, to some degree, so if you can leave degree, so if you can leave it in place, do it! it in place, do it! Without plants, we would Without plants, we would have lost all our topsoil have lost all our topsoil

• already. They are uniquely
• already. They are uniquely

and perfectly suited to and perfectly suited to prevent erosion in all its prevent erosion in all its forms. forms.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 6

Three step hydroseeding with mulch

Step One: Apply seed and fertilizer Step Two: Apply mulch (2 tons per acre) Step Three: Apply tactifier (glue)

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 7

Bonded Fiber Matrix - BFM

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 8

I neffective I nstallation I neffective I nstallation Monitoring and Monitoring and Maintenance of Maintenance of BMPs BMPs

Token measures Token measures do not prevent do not prevent storm water storm water pollution and pollution and result in civil result in civil liabilities. liabilities.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 9

Straw Mulch

Fiber Rolls Fiber Rolls

Fiber Rolls are alternative to hay bales and silt Fiber Rolls are alternative to hay bales and silt fences in almost every situation. fences in almost every situation. Installation Instructions: Place rolls into key trench 3 inches deep Place excavated soil on uphill

• r flow side of the roll

Rolls should be abutted at the ends, not overlapped Alternate stakes on both sides

• f the roll, every six inches

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 10

This is how to do it right. This is how to do it right.

Key in filter fabric a Key in filter fabric a minimum minimum of 4

• f 4”

” below the ground surface below the ground surface and 2 to 5 feet from slope toe, then backfill with dirt or grave and 2 to 5 feet from slope toe, then backfill with dirt or gravel to l to 6 to 8 inches deep. 6 to 8 inches deep.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 11

Always align silt Always align silt fences along the fences along the natural contours natural contours

• f slopes. If silt
• f slopes. If silt

fences divert and fences divert and concentrate flow, concentrate flow, they only make the they only make the problem worse. problem worse. To be effective, To be effective, silt fences must silt fences must disrupt the flow of disrupt the flow of runoff. runoff.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 12

Poor Good Poor Good Housekeeping Housekeeping Practices Practices

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 13

Utilize Covered Dumpsters

Covered dumpsters are (BAT) Covered dumpsters are (BAT)

Tracking on Tracking on Roadw ays Roadw ays

Construction Entrance Controls Construction Entrance Controls

A very A very significant significant source of non source of non-

• storm water

storm water pollutants pollutants discharge is discharge is tracking mud tracking mud from from construction construction site entrances. site entrances. This is very This is very easy to easy to mitigate, as mitigate, as shown to the shown to the right. right.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 14

I m proper W ashing I m proper W ashing

• f Streets
• f Streets

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 15

Sweep Sweep str street ets, walks and s, walks and driv ivew eways ays bef before re wa washi shing down g down!

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 16

Stockpile Stockpile Managem ent Managem ent

Dana Estate:

I neffective Concrete I neffective Concrete W ashout Areas W ashout Areas

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 17

Concrete, Gypsum, Stucco & Lime discharge…Ph >10

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 18

Placem ent and Placem ent and Condition of Toilets Condition of Toilets I neffective Drain I neffective Drain I nlet Protection and I nlet Protection and Maintenance Maintenance

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 19

Storage of Storage of Materials Materials

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 20

Paint / Stucco / Paint / Stucco / Concrete / and Related Concrete / and Related Discharges Discharges

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 21 Power Washing and Washing Power Washing and Washing Power Washing and Washing Power Washing and Washing

• f
• f Driv

Driveways eways

• f
• f Driv

Driveways eways

• If y

you p

• u power was

wer wash or

• r

If y you p

• u power was

wer wash or

• r

hose down driv hose down driveways ways hose down driv hose down driveways ways yo you must protect the u must protect the yo you must protect the u must protect the storm dra storm drain w in with BMPs th BMPs storm dra storm drain w in with BMPs th BMPs

• Use BMPs suc

e BMPs such as ro as rock ck Use BMPs suc e BMPs such as ro as rock ck bags bags, weighted fiber , weighted fiber bags bags, weighted fiber , weighted fiber rolls rolls, or birms to p , or birms to pond

• nd

rolls rolls, or birms to p , or birms to pond

• nd

th the water an e water and th d then en th the water an e water and th d then en pump i mp it to to th the si e side de or pump i mp it to to th the si e side de or ba back of the l ck of the lot usi t using a g a ba back of the l ck of the lot usi t using a g a pump or s mp or shop v

• p vacuum

uum pump or s mp or shop v

• p vacuum

uum system. system. system. system.

• I m proper

I m proper Landscaping Landscaping Activities Activities

Avoid landscaping in the rain!

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 22

De De-

• W atering

W atering Activities Activities

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 23

The Potential for Entrapment affects nearly all sites The Potential for Entrapment affects nearly all sites

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 24

Objective Objective

• Prevent Entrapment

Prevent Entrapment

• Prevent Erosion

Prevent Erosion

• Promote Vegetation

Promote Vegetation

• Root or Reinforcement

Root or Reinforcement

• Frictional Interface

Frictional Interface

Animal Friendly Products Animal Friendly Products

• Blankets w/ Soil Backfill

Blankets w/ Soil Backfill

• Moveable Joint

Moveable Joint

• Netless

Netless Blankets Blankets

• Opening size of Net

Opening size of Net

• 3 Dimensional

3 Dimensional -

• Cuspated

Cuspated

Look, Ma! One hand!

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 25

SC150BN SC150BN Wetland Un-vegetated SC150BN Wetland Vegetated SC150BN

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 26 Long Long-

• Term Non Degradable

Term Non Degradable Erosion Control Materials Erosion Control Materials

• “

“ Hard Armor Hard Armor” ” Systems Systems

• “

“ Soft Armor Soft Armor” ” Systems Systems

Hard Armor Soft Armor Soft Armor “ “Soft Armor Soft Armor” ” Erosion Control Erosion Control Materials,(TRM Materials,(TRM’ ’s) s)

• Composed of a 100% synthetic

Composed of a 100% synthetic matrix and vegetation. matrix and vegetation.

• Enhances the performance limits of

Enhances the performance limits of natural vegetation. natural vegetation.

• Flexible.

Flexible.

Advantages of Advantages of “ “Soft Armor Soft Armor” ” Systems Systems

• Cost effective versus hard armor.

Cost effective versus hard armor.

• Aesthetically pleasing.

Aesthetically pleasing.

• Fewer safety and maintenance problems.

Fewer safety and maintenance problems.

• Dissipates energy of flows.

Dissipates energy of flows.

• Vegetation filters sediment and other

Vegetation filters sediment and other contaminants. contaminants.

• Promotes water infiltration back to local

Promotes water infiltration back to local aquifer. aquifer.

• Agency approval.

Agency approval.

Construction Stormwater Pre-Wet Season Workshop, Fall 2007 27

Increased Channel Capacity...

1.5 to 2.0 x d50

Standard Riprap Cross Section

(Riprap takes up space in channel)

…the same channel cut will provide a greater flow capacity to convey more water.

Turf Reinforcement Mat (TRM)

TRM Cross Section

(TRM lining leaves more space in channel)

What do Blankets do? What do Blankets do?

Soil Infilling Soil Infilling

• Minimizes Entrapment

Minimizes Entrapment

• Maximizes Soil Contact

Maximizes Soil Contact

• Maximizes Germination

Maximizes Germination

• Root

Root Reinfrorcment Reinfrorcment

Aesthetically Pleasing Aesthetically Pleasing QUESTI ONS? QUESTI ONS?