Chapter 62-611 FAC Wetlands Applications391879964.onlinehome.us/Joomla/images/PDFBank/24t... ·...

Larry Schwartz/CDM

Florida Chamber of Commerce

Environmental Permitting Short

Course 1

Chapter 62-611 FACWetlands Application

Camp Dresser & McKee

Larry N. Schwartz, Ph.D., P.W.S


History

– Exemption for the Experimental Use of Wetlands

– Warren S. Henderson Wetlands Protection Act of

1984: rules for the use of wetlands to receive

wastewater with protection of their type, nature

and function

– 1st rule adoption 1986: 17-6.055 FAC

– 2nd rule adoption 1988: 62-611 FAC

Larry Schwartz/CDM



Course 2


62-611.100 Scope/Intent/Purpose

– Landward extent of waters of the state

– As additional data becomes available the

department will reevaluate the rule

Non-substantive elimination from the rule

Over 12 years without reevaluation


611-110 Applicability

– Rule only applies to domestic wastewaters

Need to consider agricultural and industrial waste

– Prohibitions

- Class I & II waters

- Herbaceous wetlands except if dominated by cattail

Need to allow use of herbaceous wetlands with high

quality reclaimed water

Larry Schwartz/CDM



Course 3


62-611.200 Definitions

– Herbaceous and woody wetlands



– Treatment Wetland - wastewater treated to

secondary levels with nitrification

– Receiving Wetland - wastewater treated to

advanced wastewater treatment (AWT) levels

- AWT

CBOD5 5 mg/l TSS 5 mg/l

TN 3 mg/l TP 1 mg/l

Larry Schwartz/CDM



Course 4



– Man-made Wetlands

- constructed in uplands

- not constructed for mitigation

Should be referred to as constructed wetlands

following nomenclature in the literature

Should be promoted for waste treatment

especially in conjunction with receiving wetlands

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Course 5

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Course 6



– Hydrologically Altered Woody Wetlands

- drainage resulting in substantial and continuing encroachment in upland species

– Hydrologically Altered Herbaceous

Wetlands

- drainage resulting in substantial and continuing reduction in water levels

Definitions to limiting, many wetlands could be rehydrated and this use should be promoted

Definition should address non-native species

Larry Schwartz/CDM



Course 7

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Course 8

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Course 9


62-611.300 General Qualitative Design Criteria

– Minimize channelized flow

– Maximize sheet flow

– Minimize erosion

– No adverse effect on T&E

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Course 10


62-611.350 General Quantitative Design Criteria

– Minimize alteration of natural hydroperiod

– Annual average hydraulic loading rate shall not

exceed 2 inches/week

– Except in hydrologically altered wetlands where

it shall not exceed 6 inches/week

Higher average hydraulic loading rates are appropriate in many wetland, lower average hydraulic loading rates are appropriate in certain wetlands

Therefore: consider establishing average hydraulic loading rates by wetland type


62-611.350 General Quantitative

Design Criteria

– Design criteria can be modified

after 5 years

– One day holding pond required

for wastewater

Larry Schwartz/CDM



Course 11


62-611.400 Specific Quantitative Design Criteria

– Minimum detention time of 14 days, unless

shorter detention time is appropriate

Lower detention times are appropriate

– TN loading=25 g/m2/yr HA=75 g/m2/yr

– TP loading= 3/g/m2/yr HA= 9 g/m2/yr

Loading should be based on wastewater quality as

with receiving wetlands


62-611.420 Discharge Limits to Treatment and

Receiving Wetlands

– Treatment Wetland - wastewater treated to

secondary levels with nitrification

Loading should be based on wastewater quality as with receiving wetlands

– Receiving Wetland - wastewater treated to

advanced wastewater treatment (AWT) levels

Lower TP levels are appropriate

– Total Ammonia = 2 mg/l

Larry Schwartz/CDM



Course 12


62-611.450 Discharge Limits from Treatment

and Receiving Wetlands

– Annual Average TN = 3 mg/l

– Annual Average un-ionized ammonia =

0.02 mg/l

– Annual Average TP = 0.2 mg/l

- Unless WQBELs are established or if P is not the

limiting nutrient

- If design criteria are met WQBELs should not be

required except in special circumstances

Larry Schwartz/CDM



Course 13


62-611.500 Standards within Treatment and

Receiving Wetlands

– Exemption from certain general water

quality standards; DO, nutrients, injury to

plants, turbidity

– Exemption from certain Class III water

quality standards; DO, total coliform,

biological integrity, transparency



Receiving Wetlands

DO standard

– Levels of dissolved oxygen including daily

and seasonal fluctuations shall be

maintained to prevent violations of the

biological quality standards

Larry Schwartz/CDM



Course 14



Receiving Wetlands

Wetland Biological Quality

– Diversity of benthic macroinvertebrates (>50%)

– Biomass of sport, commercial and forage fish can not

decrease by 10%

– Biomass of rough fish can not increase by 25%

– Importance values of most common vegetation in

canopy and subcanopy can not decrease by 50%

Larry Schwartz/CDM



Course 15


62-611.600 Permitting requirements

– Projects permitted under the experimental

exemption not regulated by this rule

– Projects permitted under the experimental

exemption can eventually receive a permit

under this rule

– Projects permitted prior to 1986 must be in

compliance with the rule by 1991

– Legal interest in the wetland is required

– Minor dredging and filling for the distribution

system will be reviewed with the permit ap.


62-611.650 Man-made Wetlands

– Provisions of the rule do not apply to man-

made wetlands

– Minimum (free-from) surface water quality

standards do apply

– General and Class III standards do not

apply, except for metals

– A wetland created for mitigation can not be

used as a treatment wetland, but can be

used as a receiving wetland

Larry Schwartz/CDM



Course 16


62-611.700 Monitoring Requirements

– Provide compliance with water quality

standards

– Evaluate design criteria and treatment

performance

– Monitoring plan approval required

– Modification of parameters and frequency

allowed after three years of operation

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Course 17



– Table 1 Monitoring program for unaltered

treatment wetlands

– Table 2 Monitoring program for hydrologically

altered or man-made treatment wetlands

– Table 3 Monitoring program for receiving

wetlands

– Length of baseline monitoring program, specified

parameters, frequency of monitoring, number of

sampling stations



- The tables need modification and clarification

- The performance of these systems is well

documented, therefore

In general the numbers of parameters should be

reduced as well as the monitoring frequency (monthly

to quarterly where appropriate)

Larry Schwartz/CDM



Course 18


62-611.900 Forms

– Permit application

– Monitoring plan approval


Additional Issues

– 62-40 (Water Policy) and 62-610 (Reuse of

Reclaimed Water) indicate that wetland

creation, restoration, or enhancement are

consider reuse, this should be cross

referenced in this rule

– The role of reclaimed water for mitigation

should be revisited

– Wetland systems are appropriate for wet

weather management and specific

requirements should be provided for this use

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