CALCULATING NUTRIENT

REMOVAL ASSOCIATED

WITH MAINTENANCE

ACTIVITIESPRESENTED BY:

STEFAN BROADUS

OUTLINE

1. WHAT ARE WE TRYING TO FIND?

2. WHAT ARE WE ALREADY DOING?

3. HOW DO WE CAPTURE THE DATA?

4. WHAT DID WE FIND?

5. HOW CAN WE IMPROVE?

WHAT ARE WE TRYING TO FIND?

MOST COST EFFECTIVE METHOD OF REMOVING NUTRIENTS FOR TMDL CREDITS

WHAT ARE WE TRYING TO FIND?

MOST COST EFFECTIVE METHOD OF REMOVING NUTRIENTS FOR TMDL CREDITS

SHS VCF BHS RCF JF4 Biodetention Street Sweeping

Pounds Removed Per Dollar

TP RemovedTN Removed

“Demonstration of an Infrastructure-Constrained “Bio-detention” System Loaded by Pavement Rainfall-Runoff in Gainesville, Florida”University of Florida Engineering School of Sustainable Infrastructure and Environment (ESSIE)

WHAT ARE WE TRYING TO FIND?

CALCULATE NUTRIENT REMOVAL FROM MAINTENANCE ACTIVITIES.

USE FSA TOOL FROM “QUANTIFYING NUTRIENT LOADS ASSOCIATED WITH URBAN PARTICULATE MATTER (PM) AND PRACTICES” REPORT BY SANSALONE, RAJE, AND BERRETTA.

CITY OF GAINESVILLE PERFORMS STREET SWEEPING, CATCH BASIN CLEANOUTS, AND BMP CLEANOUTS.

SWEEPINGS KEPT IN SINGLE STOCKPILE UNTIL HAULED TO TRANSFER STATION.

INVOICES MAINTAINED FROM TRANSFER STATION DOCUMENTING WEIGHT OF TRUCK.

WHAT ARE WE ALREADY DOING?

1. COLLECT TRANSFER STATION INVOICES

HOW DO WE CAPTURE THE DATA?

2. DELINEATE WATERSHEDS, STREET SWEEPING ZONES & RECLAIMED WATER AREAS

HOW DO WE CAPTURE THE DATA?

3. DETERMINE WEIGHT OF COLLECTED MATERIAL PER WATERSHED

HOW DO WE CAPTURE THE DATA?

3. DETERMINE WEIGHT OF COLLECTED MATERIAL PER WATERSHED

HOW DO WE CAPTURE THE DATA?

8 MI2 X 5.5 MILLION LBS COLLECTED = 33.5 TOTAL MI2 1 1.3M POUNDS COLLECTED IN HOGTOWN CREEK WATERSHED

4. MULTIPLY NUTRIENT CONCENTRATION BY TOTAL COLLECTED WEIGHT PER WATERSHED

HOW DO WE CAPTURE THE DATA?

X 361 MG/KG TP CONCENTRATION= 482 LBS REMOVED

X 563 MG/KG TN CONCENTRATION= 752 LBS REMOVED

5. TOTAL NUTRIENT LOAD REDUCTIONS

HOW DO WE CAPTURE THE DATA?

5. TOTAL NUTRIENT LOAD REDUCTIONS

HOW DO WE CAPTURE THE DATA?

5. TOTAL NUTRIENT LOAD REDUCTIONS

HOW DO WE CAPTURE THE DATA?

TP TN0

1,000

2,000

3,000

4,000

Maintenance Activities 1 Acre Regional Stormwater Pond

Po

un

ds R

em

ove

d P

er

Ye

ar

RESULTS

POTENTIAL IMPROVEMENTS

1. SEPARATE STOCKPILES BASED ON MAINTENANCE ACTIVITY.

Street Sweeping BMP Catch Basin0

250

500

750

1000

TP Conc (mg/kg)TN Conc (mg/kg)

POTENTIAL IMPROVEMENTS

2. SEPARATE STOCKPILES BASED ON WATERSHED.

THIS REPORT USED THE ASSUMPTION ALL MAINTENANCE ACTIVITIES OCCURRED IN PROPORTION TO AREA SWEPT PER WATERSHED.

POTENTIAL IMPROVEMENTS

2. SEPARATE STOCKPILES BASED ON WATERSHED.

3 STOCKPILES (1 FOR EACH ACTIVITY)X 20 WATERSHEDS60 STOCKPILES

POTENTIAL IMPROVEMENTS

3. ESTABLISH WATERSHED PERCENTAGES FOR ALL 3 MAINTENANCE ACTIVITIES.

POTENTIAL IMPROVEMENTS

3. ESTABLISH WATERSHED PERCENTAGES FOR ALL 3 MAINTENANCE ACTIVITIES.

EX:WATERSH

ED% OF AREA

SWEPT% OF BMP CLEAN

OUTS% OF CATCH BASIN

CLEAN OUTS

TUMBLIN CREEK 7% 12% 15%

POTENTIAL IMPROVEMENTS

4. PERIODICALLY TEST ACTUAL NUTRIENT CONCENTRATIONS.

TO CONFIRM NUTRIENT CONCENTRATIONS ASSOCIATED WITH ALL MAINTENANCE ACTIVITIES AND RECLAIMED WATER USE.

QUESTIONS

THANKS!QUESTIONS?