Major Topics Major Topics Good News Good News TMDL Basics TMDL - - PowerPoint PPT Presentation

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May 31, 2023 130 likes •220 views

Major Topics Major Topics Good News Good News TMDL Basics TMDL Basics TMDL TMDL vs vs MS4 Permit MS4 Permit Major Objections Major Objections Staff Recommendation Staff Recommendation Interested

SLIDE 1

Major Topics

Good News

Good News

TMDL Basics

TMDL Basics

TMDL

TMDL vs vs MS4 Permit MS4 Permit

Major Objections

Major Objections

Staff Recommendation

Staff Recommendation

SLIDE 2

Interested Parties Interested Parties Support the TMDL Support the TMDL

SLIDE 3

Attain Water Quality Objectives
Restore Beneficial Uses

TMDL is an “Action Plan” TMDL is an “Action Plan”

SLIDE 4

Problem Statement
Numeric Target
Source Analysis
Load Capacity or TMDL
Allocation
Linkage Analysis
Margin of Safety
Seasonal Variation / Critical Conditions

Components of a TMDL

SLIDE 5

TMDL TMDL vs vs MS4 Permit MS4 Permit

TMDL TMDL MS4 MS4 Permit Permit

SLIDE 6

Major Objections Major Objections

303(d) listed for toxicity (not

303(d) listed for toxicity (not diazinon) diazinon)

Requires immediate

Requires immediate compliance with numeric compliance with numeric limits limits

TMDL is not needed because

TMDL is not needed because

f USEPA’s phase-out
f USEPA’s phase-out

SLIDE 7

Major Objections ( Major Objections (cont cont.) .)

TMDL is redundant with MS4

TMDL is redundant with MS4 permit permit

Monitoring Program is too

Monitoring Program is too expensive expensive

Source Analysis is too

Source Analysis is too expensive expensive

SLIDE 8

Adopt

Adopt Resolution Resolution

No. R9-2002-0123
No. R9-2002-0123