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Details-Performance

The following table offers a guideline of anticipated capacities for various Nutrient Separating Baffle Box configurations, all H20 load capable. Each NSBB is custom designed and fabricated for location-specific storm drain conditions. Accordingly, capacities will vary per the design requirements.

NSBB Model
&
Internal Size1,2,3
W x L
[ft x ft]

Typical
Pipe
Sizes
[in]

Peak
Treatment
Flow4
[cfs]

Peak
Treatment Flow5
@ 80% TSS
Reduction
Efficiency
[cfs]

Basket
 Storage
Capacity
[cf]

Sediment
Chamber
Storage
Capacity
[cf]

Total
Contaminant
Storage
Capacity
[cf]

Storm Boom
Hydrocarbon
Storage
Capacity6
[gal]

Organic Spill
Storage
Capacity7
[gal]

3-6

 8-18

6 

3

11.5

54

 65

1.0

 80

4-8

 12-18

 12 

 8 

 20

92

 112

1.4

  100 

5-10

 12-30

 30 

 15 

 49

  148 

 197

1.9

 330

6-12

 18-36

 46 

 24 

 72

 204

 276

2.4

 480

7.5-14

 30-54

60 

 32 

 109

 355

 464

 6.8 

 730

7.5-16

36-54

75

40

 109

 355

 464

 6.8 

 730

10-16

 42-66

 100 

45

  236 

  570 

806

 8.8 

  1000 

12-20

 54-72

 125

55 

 419

 912

 1331

 10.8 

 1250

 1. NSBB models are typically selected based on inlet pipe size,
 2. Most models are capable of enabling multiple inlet pipes at different angles,
 3. Most models are capable of enabling multiple exit pipes at different angles or heights,
 4. Peak Treatment Flow typically is defined as the maximum design flow within the inlet pipe or pipes.
 5. 80% TSS Reduction Flow Rate refers to the maximum flow rate at which a minimum reduction in TSS will be 80%.
 6. The Storm Boom Storage refers to the maximum quantity of hydrocarbons which can be absorbed prior to replacement.
 7. The Liquid Organic Spill Storage refers to the holding capacity of the NSBB model subjected to an up-gradient spill, exclusive of the Storm Boom. 

Please contact your Regional Representative for additional Nutrient Separating Baffle Box information.