Specifying a BaySaver Separation System

The first step in specifying a BaySaver Separation System is determining where to place it. One of the advantages of the system is its flexibility in site placement. The system's separator unit component can be configured as either a right- or left-hand unit providing options on placement of the offline storage manhole. This allow you to design the system around existing structures, and the system can be placed under load bearing surfaces or in green spaces.

BaySaver Separation Systems can be designed downstream of multiple inlets or catch basins to reduce the number of devised needed on site, thus decreasing regulatory and maintenance costs. An important consideration in specifying the system is choosing a location where inspection and maintenance access is readily available.

Once placement has been determined, the best way to size the BaySaver Separator Unit is to calculate the flow rate that will be conveyed through the system. With a treatment flow rate (if you don't have a flow rate, click here) the following chart that lists the BaySaver Separation Systems flow specifications can be used for sizing.

Unit	Max. Treatment Flow (cfs)	Max Capacity Flow (cfs)
1/2K	1.1	8.5
1K	2.4	10
3K	7.8	30
5K	11.1	50
10K	21.8	100
XK	Custom	Custom

Example
A 7.5 acre highly impervious site located in Mt. Airy, Maryland, needs stormwater treatment. Local regulations specify that 80% of the Total Suspended Solids (TSS) must be removed from the yearly runoff by treating an intensity of 1" per hour.

For peak design, the 10-year design storm for this location is calculated to generate 27 cubic feet per second (cfs) of runoff to be carried through the storm drain. Using the sizing table above, we cross-reference this value against the Peak Design Flow Rates. The smallest unit that can convey this peak design flow is the 3K BaySaver Separator Unit.

For treatment, to remove 80% of the total suspended solids from this site, a flow rate is calculated using the 1" per hour rainfall intensity. This generates the treatment flow rate, which is equal to 8.1 cfs. Again using the sizing table above, we cross-reference this value against the listed Maximum Treatment Flow Rates and find that this rate exceeds that of the 3K unit. Therefore, the next larger size for the BaySaver Separator Unit is the appropriate choice, that being the 5K BaySaver Separator Unit with a Maximum Treatment Flow of 11.1 cfs.

NEW! Get a copy of the BaySaver Detail Generator Program!

This all new program saves you time and money by taking the work out of drawing the stormwater treatment system details!

It will ask you just the right questions to automatically determine the correct size of the BaySaver Separation System appropriate for your application, AND generate AutoCAD 2000 detail files for you. Click here to get a copy of the BaySaver Detail Generator.