05-0540 BaySaver Manual 071807BAYSAVER~'
YOUR BEST VALUE PER TREATED CFS
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BaySaver® Separation System
Technical and Design Manual
OCTOBER, 2002
Ba Saver Inc.
'Technical and Desi n Manual
Introduction
For years the BaySaver® team has been protecting lakes, streams, and waterways from
environmental problems. One of BaySaver®s most innovative products to control non-
point source pollution is the BaySaver® Separation Systems. The system has been
installed in commercial, industrial, and residential applications worldwide, and
continues to be used in projects as varied as parking lots, gas stations, service stations,
maintenance facilities, and highways. It is also used as pre-treatment for other types of
stormwater technologies such as ponds, infiltration systems, etc.
The BaySaver® Separation System is a physical separation system that meets
regulations for non-point source pollution control. The system operates using gravity
flow and density differences to remove oils, suspended sediments, and floatables (trash
and other floating debris) from stormwater runoff. Easy to specify, install, inspect, and
maintain, the BaySaver® Separation System helps you avoid using the valuable acreage
necessary for other types of best management practices (BMPs).
BaySaver' is the leading technology in stormwater pollution control. This manual
is an introduction to the BaySaver® Separation System line of products and to the
technical details that will help you meet your stormwater pollution control requirements
both now and in the future.
The BaySaver® team thanks you for your interest in BaySaver® stormwater pollution
control products and services. We are committed to providing you with stormwater
treatment systems that make sense and with excellent customer service. If you have
any questions about the information in this manual, please contact the BaySaver' team
at 1-800-229-7283 (1-800-BaySaver) or by e-mail at TechQuestions@BaySaver.com.
The BaySaver"' Separation System is manufactured in Mount Airy, Maryland, by BaySaver, Inc., and is
protected by one or more U.S. and international patents. Any infringement on these patents will be
prosecuted to the fullest extent of the law. For detailed information on specifying, purchasing, or installing a
BaySaver Separation System, please contact BaySaver, Inc. or an authorized representative directly.
October, 2002
' BavSaver Inc Technical and Design Manual
The BaySaver° Separation System
The BaySaver' Separation System is composed of two standard precast manholes and
the BaySaver Separator Unit. The two manholes allow the removal and storage of
pollutants, while the separator unit directs the flow of water to provide the most
efficient treatment possible. Figure 1 shows a cutaway view of the complete BaySaver
Separation System.
BaySaver Primary
Storage Separator Manhole
Manhole Unlt
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FIGURE 1 : THE BAYSAVER~ SEPARATION SYSTEM
Included with this manual is a disk containing AutoCAD details and other information
to make it easy for you to specify the BaySaver® Separation System. This manual and
the AutoCAD details are also available at the BaySaver® web site at
www.BaySaver.com. If you need clarification of any of the information provided, please
contact BaySaver technical support at 1-800-229-7283 (1-800-BaySaver).
1
2 October, 2002
Technical and Design Manual BavSaver, Inc.
The primary manhole, shown in Figure 2, is a
standard precast structure used to remove
coarse sediments. This manhole is
generally installed in-line with the storm
drain and can be used as a multiple inlet
structure. The precast manholes can be
purchased from local concrete distributors to
reduce freight costs, ensure the structures
meet local regulations, and enable
contractors to shop for the best price.
Manhole sizing guidelines can be found in
Table 3 on page 12.
FIGURE 3: THE STORAGE MANHOLE
Shown in Figure 3, the storage manhole acts
as a secondary treatment device for the
collection of oils, fine sediments and
floatables. It is a standard precast manhole
that can also be purchased locally. The
storage manhole is a key component that
sets the BaySaver~ Separation System apart
from other less effective systems. The
BaySaverm Separation System stores the
pollutants offline to prevent resuspension.
BaySaver® benefits are further discussed in
the operation section beginning on page 5.
October, 2002
FIGURE 2: THE PRIMARY MANHOLE
BaySaver Inc Technical and Design Manual
Figure 4 is a picture of the heart of the
BaySaver' Separation System, the Separator
Unit. The Bay-Saver' Separator Unit is the
device that controls the influent flow through
the two manholes. This device is
manufactured at BaySaver's facilities and
can be purchased directly from BaySaver,
Inc., or through a local BaySaver' technical
sales representative (contact BaySaver, Inc.
for additional sales information).
The BaySaver® Separator Unit is fabricated
entirely of high density polyethylene (HDPE)
infused with UV-resistant carbon-black.
HDPE is a non-brittle, chemically inert
material known for its corrosion-resistant
properties. It is commonly used in
applications that expose it to harsh
conditions (landfills and chemical plants, for
example) and is used in storm drains
throughout the world.
The separator unit itself is constructed using state-of--the-art technology and the
best materials available to ensure the quality of your BaySaver' system. Extrusion
welding ensures that the entire system is well designed to take the abuse associated
with construction applications. The separator unit is light, easy to install, and delivered
with the connecting pipes, couplers, and seals needed to install the unit to the
manholes.
The reducer/adapter in Figure 5 is used to adapt the
outlet of the BaySaver® Separator Unit to your pipe
configuration. It also allows the BaySaver®
Separator Unit to be attached to any type of outlet
pipe (concrete, metal, HDPE, etc.).
The reducer/adapter is custom manufactured from
HDPE for each project. When you specify your outlet
pipe diameter, the reducer/adapter will be shipped
with your unit along with the proper fittings for your
pipe.
FIGURE 5: THE BAYSAVER REDUCERIADAPTOR
October, 2002
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FIGURE 4: THE BAYSAVER SEPARATOR UNIT
Technical and Design Manual BaySaver Inc.
BaySaver° Separation System Operation
When rain begins to fall on ari impervious surface, the runoff carries with it the oils,
total suspended solids (TSS), and floatables that .have built up since the last storm. In
the past it was thought that the majority of these pollutants are mobilized during the
first 20 to 30 minutes of precipitation: This phenomenon is referred to as the "first
flush." Because of this theory, many BMPs have been designed around treating only
the low flows associated with this first flush. New studies2 indicate that when designing
a treatment system to treat only the first flush, it is likely the amount of pollutants
captured will not meet stormwater. regulations. Even before these studies began, the
BaySaver® Separation System was designed to treat throughout the storm.
During a storm event, rainfall. intensity can vary significantly. Peaks in the rainfall
intensity result in higher runoff flows at various frequencies during the storm. These
higher intensity precipitation flows result in additional flushes of contaminants. The
subsequent flushes need to be treated to prevent the discharge of pollutants. While
competing systems are designed to treat only the first flush and bypass these flows, the
BaySaver® Separation System was designed, from its inception, to operate
throughout the entire storm, and when properly sized will treat all flows of an
average storm for any given geographic area.
The BaySaver® Separation System is designed with three distinct flow paths to convey
and treat stormwater runoff. During low flows, the most common level of operation, the
path of influent water is through both manholes in series. During higher flows, all
influent water is treated in the primary manhole, and a portion of the water, containing
oils, sediments, and floatables, is diverted to the storage manhole for secondary
treatment. During extreme flows, the influent is directed through the system to avoid
resuspension of materials that have already been collected and to prevent flooding
upstream in the system. This section describes the flow paths and removal
mechanisms for each level of treatment.
z Studies by the University of Alabama; City of Portland, Oregon; City of Austin, Texas; University of Texas.
For more information, please contact BaySaver, Inc.
October, 2002.
Sa Saver Inc Technical and Desi n Manual
LOW FLOWS
During low flows, the BaySaver® Separation System treats all water twice. This
flow situation occurs during small storms and during the beginning. of more intense
storms.
Primary Manhole
Outlet Pipe from
Storage Manhole
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Inlet Pipe to Storage
Storage Manhole Manhole
FIGURE 6: LOW FLOW OPERATION
As shown in Figure 6, water enters the BaySaver® Separation System's primary
manhole through the inlet pipe shown on the right side of the figure. Coarse sediments
(gravel and sand) immediately fall to the floor of the primary manhole. The influent
water, carrying floatables and finer sediments, is skimmed off the surface by the
trapezoidal weir and conveyed into the storage manhole (on the left). When water enters
the storage manhole from the submerged inlet pipe, oils and other floatables rise to the
surface, while sediments settle to the floor. These contaminants remain trapped off-line
and are not resuspended during larger flows. The influent water displaces clean water
from the center of the column, which is forced back up the return pipe to the system
outfall. In this way, all of the water that reaches the system outfall has been treated in
both the primary and storage manholes.
6 October, 2002
Ba Saver Inc.
Technical and Desi n Manual
Maximum Treatment Flow
During larger storms, as storm intensity increases, flow rates continue to increase. The
BaySaver® Separation System was designed to treat these increased flows as well.
During these larger storm events, the BaySaver® Separator Unit continues to divert low
flows (containing the majority of suspended sediments, as well as the oils and other
floatables) from the primary manhole to the storage manhole.
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FIGURE 7: MAXIMUM TREATMENT tL~w
Additional flows associated with the larger storm are treated by separation in the
primary manhole. As the pollutants are separated in the primary manhole, the influent
water displaces treated water from the center of the column and forces it up the "Tee"
pipes to the system outfall. One of the advantages of the BaySaver® Separation
System design is that it treats these larger storm flows in the same way that first
flush flows were treated in the past.
October, 2002
BaySaver Inc Technical and Design Manual
Peak Design Flow
The BaySaver® Separation System also has an internal bypass to prevent flooding of the
drainage area. Influent flows with flood potential are directed over the bypass plate and
directly through the unit. If there is a concern regarding the possible conveyance of
floatables during such conditions, a custom, non-clogging screen can be added to the
system to trap 100% of floatables.
Bypass Plate
FIGURE 8: PEAK DESIGN FLOW
The BaySaver® Separation System uses the weir plate to. limit flows into the storage
manhole, drastically reducing the risk of resuspending captured pollutants such as fine
sediments, oils, and floatables that are stored offline. By storing pollutants offline,
the BaySaver® Separation System hydraulically isolates these contaminants from
the high energy influent flows.
Figure 8 shows the BaySaver® Separation System near peak design flow. The open top
"Tee" pipes are engineered to minimize resuspension risks in the primary manhole.
When the flow rate is high enough to present the possibility of resuspension, water is
allowed to flow into the top of the "Tee" pipe; this limits the flow from the bottom of the
pipe and minimizes turbulence in the center of the primary manhole.
g October, 2002
1~chnical and Design Manual BavSaver. Inc.
Engineering and Design
BaySaver® Separator Units are manufactured in five standard sizes. The sizes of both
the primary and storage manholes may be varied to suit any specific site conditions
necessary. By selecting a separator unit size and making adjustments in the manhole
diameters, the design engineer has the freedom to adapt the BaySaver® Separation
Systems to the needs of a particular site. The entire system can easily be customized
and hydraulically scaled to treat any stormwater flow.
SDecifvin~ BavSaver® Separation Systems
The first step in specifying a BaySaver® Separation System is determining where to
place it. One of the advantages of the BaySaver®.Separation System is its flexibility in
site placement. The BaySaver® Separation System can be configured as either a
right- or left-hand unit to design around existing structures and can be placed
under .load bearing surfaces or in green spaces. Looking downstream through the
system, if the storage manhole is placed to the left of the primary manhole aleft-hand
unit is needed, and if the storage manhole is placed to the right of the primary manhole
a right-hand unit is needed.
The most important consideration in specifying the site of the BaySaver® Separation
System is choosing a location where inspection and maintenance access is readily
available.
The BaySaver® Separation Systems can be designed downstream of multiple inlets or
catch basins to reduce the number of devices needed onsite, thus decreasing regulatory
and maintenance costs.
BaySaver® Separation Systems are typically shown on site plans as shown in Figure 9.
BaySaver® also makes available standardized CAD details of the system in electronic
format. These files contain all the information necessary to order materials and install
the system. Please contact the BaySaver® team for a copy of these details or visit our
web site at www.BaySaver.com.
266
265
FIGURE 9: SITE PLAN EXAMPLE
October, 2002
• BaySaver Inc Technical and Design Manual
Sizing BaySaver® Separation S sty ems
The best way to size the BaySaver® Separator Unit is to calculate the flow rate
that will be conveyed though the system. In this way, it can be determined which
separator unit best meets site specific design capacities and local regulations. The five
different sizes of separator unit have the hydraulic capacities in cubic feet per second
(cfs) shown in Table 1.
n ..,c wvrr~® CCOA~ATl1D I IAIIT FI nW RATES
I HtSLt 1 . ~HiJN
r VGf~ v~.. ,~.~. ............... -- -
Maximum Treatment - - - -
Peak Design
Head Loss
Ba Save Flow Rate Flow Rate (Full Bypass)
Separator (cfs / gpm) (cfs / gpm) (inches)
Unit
'~z K 1.1 / 494.00 8.5 / 3,815 6.3
1 K 2.4 / 1076.40 10.0 / 4,485 5.0
3K 7.8 / 3498.30 30.0 / 13,455 6.0
SK 11.1 / 4978.35 50.0 / 22,425 ,12.0
lOK 21.8 / 9777.30 100.0 / 44,850 12.0
XK Any Flow Rate Cal] BaySaver® at 1-800-229-7283 for design
The BaySaver® Separator Unit can also be sized from impervious acreage if the flow rate
generated over an acre takes into account regional differences and local regulations for
your area. For example, Table 2 shows recommended sizing guidelines based on
impervious drainage area in Mount Airy, Maryland. The site-specific conditions in your
area may be different, and the BaySaver® team is available to help adjust calculations to
your local conditions.
o ..,c ..,~o® CconoeTlnlJ SVSTFM SIZING GUIDELINES IN MT. AIRY, MARYLAND
ABLt L: CJCgmrLt O
Impervious Ai~7rw~r~ ...~~
Separator ,-..........- _ • ------ -----
Primary Manhole
Storage Manhole
Drainage Area Unit Size Minimum Diameter Minimum Ds) meter
(acres) (inches) C
<0.5 ''/zK 48 48
<1.25 1K 48 48
<4.00 3K 60 60
<5.75 SK 72 72
<11.25 l OK 120 120
10 October, 2002
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~' BaySaver Inc.
~"' Technical and Desi n Manual
~,
~ ` SizinP By Flow Rate
To size the BaySaver® Separation System, the design flow through your storm drain
must be calculated. Compare that flow rate to the Peak Design Flow Rate listed in Table
I. Select a unit with a Peak Design Flow Rate higher than your design flow. The unit
you select and all larger BaySaver® Separator Units have the capacity to convey your
design flow without backing up your system.
Local regulations may specify that a certain volume or flow rate must be treated. In that
case, compare the Maximum Treatment Flow Rate with the treatment flow specified by
your local regulations. Again, the BaySaver® Separator Unit must have a Maximum
Treatment Flow Rate that is higher than your determined treatment flow rate. This
ensures that the BaySaver® Separation System will meet your local regulations for
pollutant removal.
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
Table 1, 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 Table 1, 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 1 1.1 cfs.
If you have any questions about the sizing of a BaySaver® Separation System, local
regulations, treatment flow, or you have flow rates exceeding that of our lOK BaySaver®
Separator Unit, please call BaySaver, Inc., at 1-800-229-7283 (800-BaySaver) and one
of our application engineers will assist you, Our engineers' most important job
responsibility is to be of assistance to you, the customer. We want your business
experiences with BaySaver, Inc. to be handled professionally and are willing to do what
it takes to make your project a success.
October, 2002 1 1
~a Saver Inc Technical and Desi n Manual
Manhole Sizing
Standard BaySaver® Separation Systems use identically sized structures for both the
primary and storage manholes. An example of this is shown in Table 3. The designer
can choose to use larger manholes to account for factors specific to the site such as a
need for increased pollutant storage. The additional sediment and oil storage capacity
will result in a longer interval between required maintenance procedures.
_ .~. n..,c ....-r.® cc~wonrinn~ CvcrFM STnRAGE MANHOLE SIZING GUIDELINES
AI'SLt J. ~HiJMYCR v~
BaySaver® rr~iv~~w~~ .....•-••• -
Maximum ~ --- --
Standard Primary
Standard
Separator Unit Treatment Manhole Storage Manhole
Size Flow (cfs) Diameter (inches) Diameter (inches)
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~~ t, :~.
'/zK . ~
1.1
48 48
1 K 2.4 48 48
3K 7.8 60 60
SK 11.1 72 72
lOK 21.8 120 120
To increase the storage capacity for floatables and oils, a bulkheaded pipe may be
added to the storage manhole. This pipe can help contain a spill, and it can be
designed to match the volume of the potential event. If a spill does occur, the
BaySaver® Separation System must be maintained as soon as it is safe to do so.
Sizingand S.pecifyin~ the Reducer/Adapter
Sizing the reducer/adapter is a simple process. Specify the outlet diameter of your pipe
when the BaySaver® is ordered and the appropriate reducer/adapter will be supplied
with your unit.
12 October, 2002
~_rnra~e Capacities
BaySaver~ Separation Systems retain the trapped pollutants in the two precast
manholes. Maintenance is required we eflothe aThe maintdenadn eeintt rvall fort a typical
reach a height of two feet from th
installation is determined by the sedas tthe olidsUp~ on most sites, oils and floatables
will not accumulate at the same rate
TABLE 4: BAYSAVER® SEPARATION SYSTEM STORAGE CAPACITIES
t Floatable
® Total System Sedimen
ac
p
y
C Ca acit
y
B paration
ystem Size
S
- Volume3
(gallons (ft ))
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~ (f
d
)
a
~Y o-
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(gallons (f
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~~ ~ ri i~ ~" (37)
280
'/2K 48x48 1475 (200) 1.86 (50)
08 (64)
2 430 (58)
'/zK 48x60
''/2K 48x72 1900 (250)
2400 (325) .
~ 2(g~) ~ 630 (84)
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1.86 (50)
1475 (200) 280 (37)
1K 48x48
1900 (250) 2 08 (64) 430 (58)
1K 48x60
1 K 48x72
2400 (325)
,.,~____ 3 02 (81) ~
,.~ 630 (84) _
,
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90 (78)
2 430 (58)
60x6p
3K 2325 (310) .
54 (95)
3 630 (84)
3K 60x72
3K 60x84
-..t - .
2825 (375)
4 30 116 850 115)
3425 (460T) ,~ ,~ ~ ) ~ ---~,- ~ ~ ~y
,`^'- :~ Tf
1'
'
1
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k
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.1 ~H4Pjr i.'•~{'£?'''~d.y~'.:`
18 (113)
4
630 (84)
SK 72x72 3350 (450) .
94 (133)
4 830 (115)
SK 72x84 3950 (530) .
5
81 (157) 1110 (150)
SK 72x96 4650 (625) .
57 (177)
6 1110 (150) _,
SK 84x96 _ ._ ..__,5250,(710).... .
.,,...
. - .;;. ~„
1 OK 120x 120
5950 800
' 7.44 201
ble refle
1110 150)
ct the recommended
* Sediment and floatable storage capacit ies given in this ta
maintenance leve l.
October, 2002 13
Ba Saver Inc.
Technical and Desi n Manual
Custom Designs
T_he XK BaySaver Separation System
To meet the treatment needs of s d to treat flow ra esythat exceed the apacity
XK BaySaver Separation System. U
of the lOK Separator Unit, each XK is specifically sized to meet the exact
conditions where it is being installed. These custom-designed physical separators are
scaled hydraulically and are designed to provide the retention time necessary for
removing suspended solids, trash, and oils to meet your local regulations.
The XK BaySaver Separation System functions on the same principles as the standard
BaySaver Separation Systems. Low flows are treated in both the primary compartment
and storage compartments. Moderate flows are split into two portions with one portion
being treated exactly the same as low flows while the other portion is treated in the
primary compartment before entering the "Tee" pipes. Extreme storm flows are treated
in the primary compartment only and directed through the system. By using this
patented treatment methodology, you can expect the same performance found in our
standard BaySaver Separation Systems.
If you have an application where the flow rates exceed the capacity of the l OK BaySaver
Separator Unit, please call 800-229-7283 (800-BaySaver) and speak with one of our
applications engineers. As with all our products, the XK BaySaver Separation System
represents your best value per treated cfs.
October, 2002
1 J
Ba Saver Inc Technical and Desi n Manual
BaySaver® Separation System
~ 6 October, 2002
Technical and Des~n Manual BaySaver Inc.
Construction
BaySaver'~ Separation Systems are installed as part of the stormwater system. The
BaySaver'~' Separator Unit and the system inlet pipe are grouted into the primary
manhole using standard storm drain connections. The parallel pipes entering and
leaving the storage manhole require watertight connections: these are made using
standard boots or other locally approved seals. Flexible couplers join the BaySavercti'
Separator Unit to the parallel inlet and outlet pipes from the storage manhole. These
flexible seals prevent system failure in t}~e case of differential settling between the two
structures.
Important Note: The pipes extending clown from the separator unit interfere with
compaction of the t~ackfill material. For this reason, the area below t}~~e sepal-ator unit
must be backfilled with Plowable fill or 3/r° minus stone. The Plowable fill or stone should
extend c,p to the spring line of the pipe and run the length of the separator unit to
provide suitable bedding for the BaySaver° Separator Unit and connecting pipes.
Installation Instructions
1 . Call the local utility locator to make certain it is safe to excavate.
2. Determine the location of the primary and storage structures and excavate the hole. Slopes
must be laid back or shored as required. Excavation must provide adequate space to connect
inlet and outaet pipes to the separator manhole and t:he BaySaver~y unit. Install structures on
solid subgrade.
3. Verify the subgrade elevation against the manhole dimensions and connecting storm drain
inverts. Adjust base aggregate if necessary.
4. Install the primary manhole and storage manhole. Make sure the bases are level and that
the storage manhole openings are aligned with the separator unit. Install rubber gaskets on
base units and coat with lubricating grease. Install additional manhole sections as required.
5. Seal all the lift holes according to applicable regulations.
G. l>ackfill base sections of the ranholes to invert of storage manhole connecting pipes. Using
art ~rpprovcd backfill rnar.erial, backfill in lifts that allow for proper compaction. Compaction
nrusc be at 95`%~ or greater.
. Install the f3aySaver~' Separator Unit and connecting pipes. Seal all ehe connecting joints and
install the reducer-/adapter as necessary. Provide temporary supports and hold-downs as
necessary to stabilize the unit during remaining backfill operations.
8. Backfill the separator unit and manholes. Backfill areas not accessible to compaction
equipment with gravel or Plowable fill.
9. Install and set the manhole grade adjustments as necessary.
10. ]r~stall and set the manhole Frame and cover units.
1 1 . The primary manhole and the storage manhole must be pumped out when sediment control
measures are removed and the site is permanently stabilized. Sediment and debris require
proper disposal.
12. bill the primary n~ranl~~ole wit.l~ water to the invert of the BaySaver~' Separator Unit. Fill the
storage rnanholc with water I:o a depth of 8 feet.
October, 2002 I
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C3avSa~er Inc 'Technical and Design Manual
Inspection and Maintenance
Inspection
By r-ernoving the manhole covers. the inspector or maintenance contractor can gain
unobstructed access to the bottom of the manholes, making confined space entry
unnecessary. Site-specific inspection scheduling, coupled with maintenance that can
be completed from above grade, results in more efficient maintenance at lower cost.
Beginning the day that construction is complete, periodic inspection determines the
cleaning frequency. Most systems require yearly cleaning. In the first year, the system
should be inspected quarterly to determine pollutant loading rates. Maintenance is
needed w}~en the sediment accumulation has reached a height of two feet from the floor
in either manhole.
Maintenance
One of the advantages of BaySaver4~' Separation Systems is their ease of maintenance.
Like any system that collects pollutants, the BaySaver' Separation System must be
maintained for continued effectiveness. Maintenance is a simple procedure and is
performed using a vacuum truck or similar equipment. Access to the contaminant
storage is available through 30" manhole covers in each structure. Vacuum hoses can
reach the entire floor area of both manholes, so X11 sediments can be evacuated.
The BaySaver® Separation System was designed to minimize the volume of water
removed during routine maintenance, thus reducing disposal costs. The entire
maintenance procedure typically takes from 2 to 4 hours, depending on the size of the
system. The recommended maintenance procedure for the BaySaver@ Separation
System follows.
1 g Or_COber, 2002
TFChnrcal and Design Manual BavSaver. Inc.
Maintenance Instructions
] . Remove the two manhole covers to provide access to the contaminant storage.
2. Remove all water. debris. oils. and sediment from the storage manhole using a vacuum
truck or other equipment.
3. Using a high pressure hose, clean Che storage manhole and remove the cleaning water
using the vacuum truck.
4. Using a submersible pump, pump the bulk of the water from the primary manhole into the
clean storage manhole. The pump intake must be kept below the water surface to avoid
pur~iping surface oils, and pumping must be stopped when the water surface falls to a level
one foot above the accumulated sediments.
5. Remove the remaining water and sedirnenC from the primary rr~anhole using a vacuum
truck or ocher equipment.
6. Using a high pressure hose. clean the primary manhole and remove the cleaning water
using the vacuum truck.
7. Fill the primary manhole with water to the invert of the BaySaver~' Separator Unit. Fill the
storage manhole with water to a depth of 8 feet.
8. Replace the two manhole covers.
9. Dispose of the contaminated water at an approved facility. Local regulations often prohibit
discharge of this material to the sanitary sewer; the local sewer authority must authorize
such a discharge.
This procedure is intended to remove all the collected pollutants Fror~~ the system while
minimizing the volume of water that must be disposed. Additional local regulations
may apply to the maintenance procedure. Safe and legal disposal of pollutants is the
responsibility of the maintenance contractor; therefore maintenance should be
performed only by a qualified contractor.
BaySaver~' can assist in coordinating a maintenance contractor in the installation area.
or work directly with owners who wish to perform their own maintenance. Contact
BaySaver ~ at 1-800-229-7283 (1-800-BaySaver) for more information.
October, 2002 i 9
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HDPE REDUCER FLEXIBLE WATERTIGHT STANDARD PRECAST STRUCTURE
(AS REQUIRED) COUPLERSWITH WATERTIGHT JOINTS
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WITH SHEAR RING
A A
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BAYSAVER SEPARATOR-UNIT
. (SEE DETAIL FOR DIMENSIONS)
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STANDARD PRECAST STRUCTURE
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SYSTEM INLET PIPE
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~~'~"'~° ~'~~~°;5~~~0 SHEET: 1 OF 3
BAYSAVER SEPARATION
SYSTEM PLAN- VIEW
VENTED MANHOLE COVER
1 FT. MINIMUM COVER REQUIRED
OVER SEPARATOR UNIT TO MEET
H-20 LOADING CRITERIA.
~J.
BAYSAVER
SEPARATOR UNIT
FLEXIBLE COUPLER
WITH SHEAR RING -
3/4" STONE OR
f LOWABLE FILL BENEATH
SEPARATOR UNIT 4'
,;.. -
STORAGE MANHOLE
SECTION AA
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.-....:. ,;~ ,r:' DRAWN:
CHECKED: ATM
_.., .._..~._.. ~ - DATE:
~r:'~~~~Jl"~~'~~~~;.iiiw~,",1~%[]~ ~:u~~7it SCALE: N. T. S.
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BAYSAVER SYSTEM
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1 FT. MINIMUM COVER REQUIRED OVER SEPARATOR
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VENTED MANHOLE
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- HDPE REDUCER
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CHECKED: ATM BAYSAVER SYSTEM
DATE: 10 18 02
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FABRICATION NOTES:
1. SEPARATOR UNIT SHALL BE CONSTRUCTED ENTIRELY
OF HIGH DENSITY POLYETHYLENE. HDPE MATERIAL
SHALL CONTAIN CARBON-BLACK TO PROVIDE UV
RESISTANCE.
2. ALL JOINTS SHALL BE WELDED BY EXTRUSION
WELDING OR BUTT-FUSION WELDING. BUTT-FUSED
JOINTS SHALL BE REINFORCED BY AN EXTRUDED
BEAD AROUND THE FUSION AREA.
3. SOLID WALL HDPE PIPE SHALL BE MINIMUM SDR-26
4. HDPE PLATE SHALL BE 1 /2" THICKNESS.
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CHECKED: ACS / HA~~ K SEPARATOR UNIT
ii I;'~~: , ~ ,-i.~c~ _..~~''~: i~:u~.%~'C%> IL1~~rlii~' Il 10 1 7 02
_. . _ ... _ DATE:
I;i!,T:ui~l~~"!~ f'~iil':.1:'~, i~iii!1~ ` ~''y'y it SCALE: 1 " = 24"
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/ 7.10" ID
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6"
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HDPE CONNECTION PIPES
FOR CONNECTION TO STORAGE MANHOLE
NOT TO SCALE
HDPE-HDPE REDUCER DETAIL
FOR USE WITH OUTLET PIPES
NOT TO SCALE
A~
24" CORRUGATED
HDPE PIPE
MAR MAC POLYSE~
WATERTIGHT COUPLER KLAN VItW
24" I
OU TLE T
PIPE ID
SECTION AA
MAR MAC POLYSEAL
WATERTIGHT COUPLER
4 CORRUGATIONS
FERNCO FITTING DETAIL
(NOT TO SCALE)
FERNCO PART # 1055-66
SHEAR RING PART # SR-27
_. , ---,-, ,_ ,; ;~-I~o DESIGNED:_ TEP ',
..,.... _~°:~~ ~ ~:~<;1~`,,_ `,:: ~I~"~_~~, DRAWN: TFR
CHECKED: ATM HALF K SEPARATOR UNIT
-., - -.;,,~ ;._ir ~;;y:j i~.~I~,~~.~ tiJ>~j;('~r II 10/17/02 N 0 TE S AND D E TA I ~S
.. _. .._........ _ .DATE:
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. ~~'; ~;y'<°~L~s"r''U SHEET: 2 OF 2
BaySaver® serves the global community by offering effective stormwater
treatment systems and services, and backing everything we do with a
commitment to excellence.
BA
AVER
BaySaver, Inc.
1-800-229=7283 301-829-6470
1-800-BaySaver Fax 301-829-3747
West Coast Regional Sales
Woodland Hills, CA
1-800-905-6865
East Coast Regional Sales &
Corporate Headquarters .
1302 Rising Ridge Rd.
Mount Airy, MD 21771
WWW . BAYSAVER. COM
Manufacturing Facilities
Shipping & Receiving
1010 Deer Hollow Dr.
Mount Airy, MD 21771
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