PERMITTING AND USE INFORMATION FOR WATERLOO BIOFILTER

PERMITTING AND USE INFORMATION FOR WATERLOO BIOFILTER

Technology Name

To be installed in designated nitrogen sensitive area

Is flow design over 2000 gpd?

DEP approval status

DEP permit required

DEP
Fee

Send application and/or permits to

WATERLOO BIOFILTER	YES or NO no nitrogen credit	YES or NO	Piloting	BOH approval with transmittal form to DEP. If Title 5 variance required use BRP WP 59b.	if neeeded, BRP WP 59b= $200	BOH approval, plans and manufacturers transmital form to DEP Boston. BRP WP 59b to DEP Regional Office
	YES or NO no nitrogen credit	YES or NO	Remedial	None, provided use of technology is consistent with DEP approved conditions for remedial use. If Title 5 variance req. use BRP WP 59b	if needed, BRP WP 59b= $200	BRP WP 59b to DEP Regional Office

Technology Name	To be installed in designated nitrogen sensitive area?	Is flow design over 2000 gpd?	DEP approval status	DEP Monitoring Requirements	Nitrogen Credit in areas otherwise limited to 440 gpd/acre (systems < 2000 gpd only)	Other Conditions/ Allowances for Use
WATERLOO BIOFILTER	YES or NO	YES or NO	Piloting	influent and effluent' monthly 1st year, quarterly thereafter for pH, BOD, TSS, TKN, NO3, NH3, fecal coliform	not applicable no nitrogen credit	seeking approval for: groundwater separation distance of 18 inches increased loading rates: Soil Textural Class I 5.0 gpd/sf Soil Textural Class II 3.0 gpd/sf Soil Textural Class III 2.5 gpd/sf Soil Textural Class IV 1.0 gpd/sf (pressure trench only) must be under maintenance agreement with MA certified operator at all times
	YES or NO	YES or NO	Remedial	effluent quarterly for pH, BOD, TSS	not applicable no nitrogen credit	must be under maintenance agreement as above. may be used in soils with perc 60-90 min/in at loading rate of 0.15 gpd/sf. 50% reduction in size of SAS or 2 ft reduction of req. groundwater separation or 2 ft reduction in req. depth of naturally occurring soil under SAS allowed.