ATT 6 - Carmax WQMP - 9.19.24 — Murrieta City Council, May 20, 2025 (part 3 of 3)

3.5 Bioretention Facility
Description
Bioretention Facilities are shallow, vegetated basins underlain by an engineered soil media.

Healthy plant and biological activity in the root zone maintain and renew the macro‐pore space in the soil and maximize plant uptake of pollutants and runoff. This keeps the Best Management Practice (BMP) from becoming clogged and allows more of the soil column to function as both a sponge (retaining water) and a highly effective and self‐maintaining biofilter.

In most cases, the bottom of a Bioretention Facility is unlined, which also provides an opportunity for infiltration to the extent the underlying onsite soil can accommodate. When the infiltration rate of the underlying soil is exceeded, fully biotreated flows are discharged via underdrains. Bioretention Facilities therefore will inherently achieve the maximum feasible level of infiltration and evapotranspiration and achieve the minimum feasible (but highly biotreated) discharge to the storm drain system.

Siting Considerations
These facilities work best when they are designed in a relatively level area. Unlike other BMPs, Bioretention Facilities can be used in smaller landscaped spaces on the site, such as:
 Parking islands
 Medians
 Site entrances
Landscaped areas on the site (such as may otherwise be required through minimum landscaping ordinances), can often be designed as Bioretention Facilities. This can be accomplished by:
 Depressing landscaped areas below adjacent impervious surfaces, rather than elevating those areas
 Grading the site to direct runoff from those impervious surfaces into the Bioretention Facility, rather than away from the landscaping
 Sizing and designing the depressed landscaped area as a Bioretention Facility as described in this Fact Sheet
Type of BMP LID – Bioretention
Treatment Mechanisms Infiltration, Evapotranspiration, Evaporation, Biofiltration Maximum Drainage Area This BMP is intended to be integrated into a project’s landscaped area in a distributed manner. Typically, contributing drainage areas to Bioretention Facilities range from less than 1 acre to a maximum of around 10 acres.

Other Names Rain Garden, Bioretention Cell, Bioretention Basin, Biofiltration Basin, Landscaped Filter Basin, Porous Landscape Detention
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Bioretention Facilities should however not be used downstream of areas where large amounts of sediment can clog the system. Placing a Bioretention Facility at the toe of a steep slope should also be avoided due to the potential for clogging the engineered soil media with erosion from the slope, as well as the potential for damaging the vegetation.

Design and Sizing Criteria
The recommended cross section necessary for a Bioretention Facility includes:
 Vegetated area
 18' minimum depth of engineered soil media
 12' minimum gravel layer depth with 6' perforated pipes (added flow control features such as orifice plates may be required to mitigate for HCOC conditions) While the 18‐inch minimum engineered soil media depth can be used in some cases, it is recommended to use 24 inches or a preferred 36 inches to provide an adequate root zone for the chosen plant palate. Such a design also provides for improved removal effectiveness for nutrients. The recommended ponding depth inside of a Bioretention Facility is 6 inches; measured from the flat bottom surface to the top of the water surface as shown in Figure 1.

Because this BMP is filled with an engineered soil media, pore space in the soil and gravel layer is assumed to provide storage volume. However, several considerations must be noted:
 Surcharge storage above the soil surface (6 inches) is important to assure that design flows do not bypass the BMP when runoff exceeds the soil’s absorption rate.  In cases where the Bioretention Facility contains engineered soil media deeper than 36 inches, the pore space within the engineered soil media can only be counted to the 36‐ inch depth.
 A maximum of 30 percent pore space can be used for the soil media whereas a maximum of 40 percent pore space can be use for the gravel layer.

Figure 1: Standard Layout for a Bioretention Facility

BIORETENTION FACILITY BMP FACT SHEET
Riverside County - Low Impact Development BMP Design Handbook rev. 2/2012

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Engineered Soil Media Requirements
The engineered soil media shall be comprised of 85 percent mineral component and 15 percent organic component, by volume, drum mixed prior to placement. The mineral component shall be a Class A sandy loam topsoil that meets the range specified in Table 1 below. The organic component shall be nitrogen stabilized compost1, such that nitrogen does not leach from the media.

Table 1: Mineral Component Range Requirements
Percent Range Component
70‐80 Sand
15‐20 Silt
5‐10 Clay
The trip ticket, or certificate of compliance, shall be made available to the inspector to prove the engineered mix meets this specification.

Vegetation Requirements
Vegetative cover is important to minimize erosion and ensure that treatment occurs in the Bioretention Facility. The area should be designed for at least 70 percent mature coverage throughout the Bioretention Facility. To prevent the BMP from being used as walkways, Bioretention Facilities shall be planted with a combination of small trees, densely planted shrubs, and natural grasses. Grasses shall be native or ornamental; preferably ones that do not need to be mowed. The application of fertilizers and pesticides should be minimal. To maintain oxygen levels for the vegetation and promote biodegradation, it is important that vegetation not be completely submerged for any extended period of time. Therefore, a maximum of 6 inches of ponded water shall be used in the design to ensure that plants within the Bioretention Facility remain healthy.

A 2 to 3‐inch layer of standard shredded aged hardwood mulch shall be placed as the top layer inside the Bioretention Facility. The 6‐inch ponding depth shown in Figure 1 above shall be measured from the top surface of the 2 to 3‐inch mulch layer.

Curb Cuts
To allow water to flow into the Bioretention Facility, 1‐foot‐wide (minimum) curb cuts should be placed approximately every 10 feet around the perimeter of the Bioretention Facility. Figure 2 shows a curb cut in a Bioretention Facility. Curb cut flow lines must be at or above the VBMP water surface level.

1 For more information on compost, visit the US Composting Council website at: http://compostingcouncil.org/

BIORETENTION FACILITY BMP FACT SHEET
Riverside County - Low Impact Development BMP Design Handbook rev. 2/2012

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Figure 2: Curb Cut located in a Bioretention Facility
To reduce erosion, a gravel pad shall be placed
at each inlet point to the Bioretention Facility.

The gravel should be 1‐ to 1.5‐inch diameter in
size. The gravel should overlap the curb cut
opening a minimum of 6 inches. The gravel pad
inside the Bioretention Facility should be flush
with the finished surface at the curb cut and
extend to the bottom of the slope.

In addition, place an apron of stone or concrete,
a foot square or larger, inside each inlet to
prevent vegetation from growing up and
blocking the inlet. See Figure 3.

Terracing the Landscaped Filter Basin
It is recommended that Bioretention Facilities be level. In the event the facility site slopes and lacks proper design, water would fill the lowest point of the BMP and then discharge from the basin without being treated. To ensure that the water will be held within the Bioretention Facility on sloped sites, the BMP must be terraced with nonporous check dams to provide the required storage and treatment capacity.

The terraced version of this BMP shall be used on non‐flat sites with no more than a 3 percent slope. The surcharge depth cannot exceed 0.5 feet, and side slopes shall not exceed 4:1. Table 2 below shows the spacing of the check dams, and slopes shall be rounded up (i.e., 2.5 percent slope shall use 10' spacing for check dams).

Table 2: Check Dam Spacing
6” Check Dam Spacing
Slope Spacing
1% 25'
2% 15'
3% 10'
Figure 3: Apron located in a Bioretention Facility

BIORETENTION FACILITY BMP FACT SHEET
Riverside County - Low Impact Development BMP Design Handbook rev. 2/2012

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Roof Runoff
Roof downspouts may be directed towards Bioretention Facilities. However, the downspouts must discharge onto a concrete splash block to protect the Bioretention Facility from erosion.

Retaining Walls
It is recommended that Retaining Wall Type 1A, per Caltrans Standard B3‐3 or equivalent, be constructed around the entire perimeter of the Bioretention Facility. This practice will protect the sides of the Bioretention Facility from collapsing during construction and maintenance or from high service loads adjacent to the BMP. Where such service loads would not exist adjacent to the BMP, an engineered alternative may be used if signed by a licensed civil engineer.

Side Slope Requirements
Bioretention Facilities Requiring Side Slopes
The design should assure that the Bioretention Facility does not present a tripping hazard.

Bioretention Facilities proposed near pedestrian areas, such as areas parallel to parking spaces or along a walkway, must have a gentle slope to the bottom of the facility. Side slopes inside of a Bioretention Facility shall be 4:1. A typical cross section for the Bioretention Facility is shown in Figure 1.

Bioretention Facilities Not Requiring Side Slopes
Where cars park perpendicular to the Bioretention Facility, side slopes are not required. A 6‐ inch maximum drop may be used, and the Bioretention Facility must be planted with trees and shrubs to prevent pedestrian access. In this case, a curb is not placed around the Bioretention Facility,
but wheel stops shall be used to prevent vehicles from entering the Bioretention Facility, as shown in Figure 4.

Figure 4: Bioretention Facility Layout without Side Slopes

BIORETENTION FACILITY BMP FACT SHEET
Riverside County - Low Impact Development BMP Design Handbook rev. 2/2012

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Planter Boxes
Bioretention Facilities can also be placed above ground as planter boxes. Planter boxes must have a minimum width of 2 feet, a maximum surcharge depth of 6 inches, and no side slopes are necessary. Planter boxes must be constructed so as to ensure that the top surface of the engineered soil media will remain level. This option may be constructed of concrete, brick, stone or other stable materials that will not warp or bend. Chemically treated wood or galvanized steel, which has the ability to contaminate stormwater, should not be used. Planter boxes must be lined with an impermeable liner on all sides, including the bottom. Due to the impermeable liner, the inside bottom of the planter box shall be designed and constructed with a cross fall, directing treated flows within the subdrain layer toward the point where subdrain exits the planter box, and subdrains shall be oriented with drain holes oriented down. These provisions will help avoid excessive stagnant water within the gravel underdrain layer. Similar to the in‐ground Bioretention Facility versions, this BMP benefits from healthy plants and biological activity in the root zone. Planter boxes should be planted with appropriately selected vegetation.

Figure 5: Planter Box
Source: LA Team Effort
Overflow
An overflow route is needed in the Bioretention Facility design to bypass stored runoff from storm events larger than VBMP or in the event of facility or subdrain clogging. Overflow systems must connect to an acceptable discharge point, such as a downstream conveyance system as shown in Figure 1 and Figure 4. The inlet to the overflow structure shall be elevated inside the Bioretention Facility to be flush with the ponding surface for the design capture volume (VBMP) as shown in Figure 4. This will allow the design capture volume to be fully treated by the Bioretention Facility, and for larger events to safely be conveyed to downstream systems. The overflow inlet shall not be located in the entrance of a Bioretention Facility, as shown in Figure

6. BIORETENTION FACILITY BMP FACT SHEET
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Underdrain Gravel and Pipes
An underdrain gravel layer and pipes shall be provided in accordance with Appendix B – Underdrains.

Figure 6: Incorrect Placement of an Overflow Inlet.

Inspection and Maintenance Schedule
The Bioretention Facility area shall be inspected for erosion, dead vegetation, soggy soils, or standing water. The use of fertilizers and pesticides on the plants inside the Bioretention Facility should be minimized.

Schedule Activity
Ongoing
 Keep adjacent landscape areas maintained. Remove clippings from landscape maintenance activities.
 Remove trash and debris
 Replace damaged grass and/or plants
 Replace surface mulch layer as needed to maintain a 2‐3 inch soil cover.

After storm events  Inspect areas for ponding
Annually  Inspect/clean inlets and outlets
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Bioretention Facility Design Procedure
1) Enter the area tributary, AT, to the Bioretention Facility. 2) Enter the Design Volume, VBMP, determined from Section 2.1 of this Handbook. 3) Select the type of design used. There are two types of Bioretention Facility designs: the standard design used for most project sites that include side slopes, and the modified design used when the BMP is located perpendicular to the parking spaces or with planter boxes that do not use side slopes.
4) Enter the depth of the engineered soil media, dS. The minimum depth for the engineered soil media can be 18' in limited cases, but it is recommended to use 24' or a preferred 36' to provide an adequate root zone for the chosen plant palette. Engineered soil media deeper than 36' will only get credit for the pore space in the first 36'. 5) Enter the top width of the Bioretention Facility.
6) Calculate the total effective depth, dE, within the Bioretention Facility. The maximum allowable pore space of the soil media is 30% while the maximum allowable pore space for the gravel layer is 40%. Gravel layer deeper than 12' will only get credit for the pore space in the first 12'.
a. For the design with side slopes the following equation shall be used to determine the total effective depth. Where, dP is the depth of ponding within the basin. d୉ሺftሻ ൌ 0.3 ൈ ቂ൫w୘ሺftሻ ൈdୗሺftሻ൯ ൅ 4൫d୔ሺftሻ൯
ଶ
ቃ ൅ 0.4 ൈ 1ሺftሻ ൅d୔ሺftሻൣ4d୔ሺftሻ ൅ ൫w୘ሺftሻ െ 8d୔ሺftሻ൯൧ w୘ሺftሻ
This above equation can be simplified if the maximum ponding depth of 0.5’ is used. The equation below is used on the worksheet to find the minimum area required for the Bioretention Facility:
d୉ሺftሻ ൌ ሺ0.3 ൈ dୗሺftሻ ൅ 0.4 x 1ሺftሻሻ െቆ0.7 ሺftଶሻ
w୘ሺftሻ ቇ ൅ 0.5ሺftሻ
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b. For the design without side slopes the following equation shall be used to determine the total effective depth:
d୉ሺftሻ ൌd୔ሺftሻ ൅ ሾሺ0.3ሻ ൈdୗሺftሻ ൅ ሺ0.4ሻ ൈ 1ሺftሻሿ
The equation below, using the maximum ponding depth of 0.5', is used on the worksheet to find the minimum area required for the Bioretention Facility:
d୉ሺftሻ ൌ 0.5 ሺftሻ ൅ ሾሺ0.3ሻ ൈdୗሺftሻ ൅ ሺ0.4ሻ ൈ 1ሺftሻሿ
7) Calculate the minimum surface area, AM, required for the Bioretention Facility. This does not include the curb surrounding the Bioretention Facility or side slopes.

A୑ሺftଶሻ ൌ V୆୑୔ሺftଷሻ
d୉ ሺftሻ
8) Enter the proposed surface area. This area shall not be less than the minimum required surface area.
9) Verify that side slopes are no steeper than 4:1 in the standard design, and are not required in the modified design.
10) Provide the diameter, minimum 6 inches, of the perforated underdrain used in the Bioretention Facility. See Appendix B for specific information regarding perforated pipes.
11) Provide the slope of the site around the Bioretention Facility, if used. The maximum slope is 3 percent for a standard design.
12) Provide the check dam spacing, if the site around the Bioretention Facility is sloped. 13) Describe the vegetation used within the Bioretention Facility.

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References Used to Develop this Fact Sheet
Anderson, Dale V. "Landscaped Filter Basin Soil Requirements." Riverside, May 2010.

California Department of Transportation. CalTrans Standard Plans. 15 September 2005. May 2010 <http://www.dot.ca.gov/hq/esc/oe/project_plans/HTM/stdplns‐met‐new99.htm>.

Camp Dresser and McKee Inc.; Larry Walker Associates. California Stormwater Best Management Practice Handbook for New Development and Redevelopment. California Stormwater Quality Association (CASQA), 2004.

Contra Costa Clean Water Program. Stormwater Quality Requirements for Development Applications. 3rd Edition. Contra Costa, 2006.

County of Los Angeles Public Works. Stormwater Best Management Practice Design and Maintenance Manual. Los Angeles, 2009.

Kim, Hunho, Eric A. Seagren and Allen P. Davis. "Engineered Bioretention for Removal of Nitrate from Stormwater Runoff." Water Environment Research 75.4 (2003): 355‐366.

LA Team Effort. LA Team Effort: FREE Planter Boxes for Businesses. 2 November 2009. May 2010 <http://lateameffort.blogspot.com/2009/11/free‐planter‐boxes‐for‐businesses‐est.html>.

Montgomery County Maryland Department of Permitting Services Water Resources Section.

Biofiltration (BF). Montgomery County, 2005.

Program, Ventura Countywide Stormwater Quality Management. Technical Guidance Manual for Stormwater Quality Control Measures. Ventura, 2002.

United States Environmental Protection Agency. Storm Water Technology Fact Sheet Bioretention. Washington D.C, 1999.

Urban Drainage and Flood Control District. Urban Storm Drainage Criteria Manual Volume 3 ‐ Best Management Practices. Vol. 3. Denver, 2008. 3 vols.

Urbonas, Ben R. Stormwater Sand Filter Sizing and Design: A Unit Operations Approach. Denver:

Urban Drainage and Flood Control District, 2002.

Riverside County Best Management Practice Design Handbook JUNE 2010
BMP ID
Company Name: Date:

Enter the area tributary to this feature AT= acres
Enter VBMP determined from Section 2.1 of this Handbook VBMP= ft3 Depth of Soil Filter Media Layer dS = ft
Top Width of Bioretention Facility, excluding curb wT = ft Total Effective Depth, dE
dE = ft
dE = [(0.3) x dS + (0.4) x 1] + 0.5 dE = ft
AM = ft2
A= ft2
Minimum Required Length of Bioretention Facility, L L = ft z = :1
Diameter of Underdrain inches
Longitudinal Slope of Site (3% maximum) %
6" Check Dam Spacing feet
Describe Vegetation:

Notes:

Required Entries
Minimum Surface Area, Am
dE = (0.3) x dS + (0.4) x 1 - (0.7/wT) + 0.5
Type of Bioretention Facility Design
VBMP (ft3) AM (ft2
) =
Proposed Surface Area
dE (ft)
Bioretention Facility Properties
Bioretention Facility - Design Procedure Legend:

Design Volume
Calculated Cells
Bioretention Facility Surface Area
Side Slopes in Bioretention Facility
Side slopes required (parallel to parking spaces or adjacent to walkways) No side slopes required (perpendicular to parking space or Planter Boxes) Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
53 Appendix 5: LID Feasibility
Supplemental Information
Information that supports or supplements the determination of LID technical feasibility documented in Section D Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
54 Proprietary Biofiltration Criteria
The applicant shall provide documentation of compliance with each criterion in this checklist as part of the project submittal. Proprietary Biofiltration BMPs shall not be proposed if the BMP will accept undeveloped off-site tributary flows, where potential silt/sediment could clog or otherwise negatively impact the BMP.
1 All BMPs must be sited/designed with the max. feasible infiltration/evapotranspiration 6 .

Requirement Response
1a What was the development status of the site prior
to project application (i.e. raw ungraded land, or
redevelopment with existing graded conditions)?
– There will be more expectations to infiltrate if
the project is a new development.

The three parcels are currently vacant lands
with the exception of existing detention
basins on the southwestern and southeastern
lots.
1b History of design discussions/coordination for the
site proposed project, resulting in the final design
determination (i.e. infiltration vs. flow-thru):

No infiltration will be proposed due to low
infiltration rates provided by the Geotech.

MSU units will be used to treat and discharge
stormwater.
1c The consideration of site design alternatives to
achieve infiltration or partial infiltration on site;
Partial infiltration is not feasible due to low
infiltration rates.
1d The physical impairments (i.e., fire road egress,
public safety considerations, sewer lines, etc.) and
public safety concerns (impermeable liners only
to avoid geotech or contamination issues);
N/A
1e The extent low impact development BMP
requirements were included in the project site
design (site design worksheets can be attached).

Site design worksheets for the flow-based
sizing are included.
1f When in the development process (e.g.
entitlement or plan check, with dates of
geotechnical work and development approval
dates) did a geotechnical engineer analyze the
site for infiltration feasibility?
A geotechnical report was prepared by
Leighton Consulting on April 25, 2023.

Infiltration testing results were provided on
June 27, 2023.
1g What was the scope of the geotechnical testing? Scope included a site reconnaissance and excavation, logging, and sampling of seven (7)
exploratory borings, and a Geotechnical
laboratory testing of selected soil samples
collected during the evaluation.
1h What are Public Health and Safety requirements
that affect infiltration locations?
N/A
6 To address San Diego Regional Board letter dated April 28, 2017 regarding documentation to support infeasibility to retain or infiltrate storm water on-site. This document will be used to meet the Regional Board requirements for documentation. As such, not apply or non-responses will not be accepted.

Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
55 1i What are the conclusions and recommendations
from the geotechnical engineer, in regards to
infiltrating/retaining on-site or allowing some or
all of the flows to flow-thru as a proprietary BMP?
Due to low infiltration rates, infiltration is not
feasible. The primary purpose of the
redevelopment is to maximize staging areas
therefore underground detention was used
and MWS were provided in the available
landscape areas.
1j How will the proposed proprietary biofiltration
BMPs achieve maximum feasible retention
(evapotranspiration and infiltration) of the water
quality volume, as required by MS4 Permits?
The proprietary biofiltration system was sized
to provide 1.5 times the design flow rate.
2 Proprietary Biofiltration BMP sizing (all proprietary/compact BMPs require TAPE approval) 7 Requirement Response
2a Use Table F-1 and F-2 of the WQMP template to
identify and list all the pollutants of concern.

Nutrients, metals, toxicity, pesticides and
herbicides.
2b Attached Active Technology Acceptance
Protocol-Ecology (TAPE) certification, with General
Use Level Designation (GULD) for all of applicable
pollutants of concern
Yes _________ or No__________
2c The most restrictive loading rates outlined in TAPE
GULD approval8for all of the pollutants of concern. 1 gpm per sq ft 2d Attach calculations, and all relevant steps to show
that the sizing of the proprietary BMP is based on
the flowrate (or volume) used to obtain
TAPE/GULD approval (the most restrictive rate).

Yes _________ or No__________
2e Are the infiltration rates are outlet controlled
(e.g., via an underdrain and orifice/weir) or
controlled by the infiltration rate of the media?
Faster infiltration rates thru the media tend to
reduce O&M issues.

Is the design infiltration rate controlled by the
outlet? Yes _________ or No__________
If No, provide the rates for the outlet and the
media and explain why outlet control is not
practicable.
2f Does the water surface drains to at least 12
inches below the media surface within 24 hours
from the end of storm event flow to preserve
plant health and promote healthy soil structure?
Yes _________ or No__________
7 Full scale field testing data that has been verified by Washington Department of Ecology and General Use Level Designation is required. https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Stormwaterpermittee-guidance-resources/Emerging-stormwater-treatment-technologies. Otherwise, the County has no obligation to accept the use of any other proprietary flow-thru BMP. Additional guidance can be found at the end of this checklist from the San Diego BMPDM Appendix F.1 for other verified third-party, field scale testing performance criteria that does not meet the Washington Department of Ecology standards. 8 E.g. if the BMP was certified/verified with 100 gallons per minute treatment rate, the BMP shall be sized with no more than the equivalent rate).

X
X
X
X
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
56 3 Biofiltration BMPs must be designed to promote appropriate biological activity to support and maintain treatment processes.

Requirement Response
3a Plants tolerant of project climate, design ponding
depths and the treatment media composition.

Provide documentation justifying plant
selection.9
3b Plants that minimize irrigation requirements. Provide documentation describing irrigation requirements for establishment and long term
operation.
3c Plant location and growth will not impede
expected long-term media filtration rates and will
enhance long-term infiltration rates to the extent
possible.

Provide documentation justifying plant
selection.4
3d If plants are not applicable to the biofiltration
design, other biological processes are supported
as needed to sustain treatment processes (e.g.,
biofilm in a subsurface flow wetland). TAPE GULD
approval that identifies approval with and
without plants can be submitted for approval.

For biofiltration designs without plants,
describe the biological processes that will
support effective treatment and how they will
be sustained.
4 Biofiltration BMPs must be designed with a hydraulic loading rate to prevent erosion, scour, and channeling within the BMP. Erosion, scour, and/or channeling can disrupt treatment processes and reduce effectiveness.

Requirement Response
4a What pre-treatment devices (e.g. vegetated
buffers, catch basin inserts) and designs (e.g.
forebay berms with cutouts) are proposed?
Trash capture inlets at every inlet. ADS
MC3500 has an isolated row for sediment.

MWS has a prefilter box for pollutants.
4b Adequate scour protection has been provided for
both sheet flow and pipe inflows to the BMP.

Trash capture inlets at every inlet. ADS
MC3500 has an isolated row for sediment.

MWS has a prefilter box for pollutants.
4c Where scour protection has not been provided,
flows into and within the BMP are kept to nonerosive velocities.

What are the maximum velocities for sheet
flow and pipe inflows into the BMP? Minimum
grade has been provided to reduce slope
velocities.
4d The BMP is used in a manner consistent with
manufacturer guidelines and conditions of its
third-party certification (e.g. maximum tributary
area, maximum inflow velocities, etc.).

Manufacturer Requirements vs. the Design
A safety factor of 1.5 was added to the
recommended manufacturer sizing.
9 See Appendix E.20 of the San Deigo BMPDM for initial plan list for consideration for Riverside County.

Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
57 4e To preserve permeability, the media should have
substantial void ratios and avoidance of choking
layers.

Provide media gradation calculations and (if
proposed) geotextile selection calculations if
the geotextile could affect hydraulic loading
rate.
5 Biofiltration BMP must include operation and maintenance design features and planning considerations for continued effectiveness of pollutant removal and flow control functions.

Biofiltration BMPs require regular maintenance in order provide ongoing function as intended.

Additionally, it is not possible to foresee and avoid potential issues as part of design; therefore, plans must be in place to correct issues if they arise.

Requirement Response
5a Is there any media or cartridge required to
maintain the function of the BMP sole-sourced or
proprietary in any way? If yes, obtain explicit
approval by the Agency. Potentially full
replacement costs to a non-proprietary BMP
needs to be considered.

Yes _________ or No__________, explain:
5b The maintenance plan specific for the proprietary
BMP specific inspection activities, regular/periodic
maintenance activities and specific corrective
actions relating to scour, erosion, channeling,
media clogging, vegetation health, and inflow and
outflow structures.

This is in addition to the O&M Plan described
in the WQMP guidance document, Section 5.

O&M manual has been provided.
5c Adequate site area and features have been
provided for BMP inspection and maintenance
access.

Illustrate maintenance access routes,
setbacks, maintenance features as needed on
project water quality plans
5d For proprietary biofiltration BMPs, the BMP
maintenance plan is consistent with manufacturer
guidelines and conditions of its third-party
certification (i.e., maintenance activities,
frequencies).

Yes _________ or No__________
5e Describe all portions of the BMP that may
potentially clog or present an O&M issue.

Prefilter cartridge, pretreatment chamber,
BioMediaGREEN
5f Describe design features to address each of the
potential clogging or O&M issues.

Access covers throughout the MWS
By signing below, the preparer certifies all the information provided with this submittal and submittals related to proprietary BMPs for the project is accurate, and relevant information to assess the long-term operation and maintenance of this proprietary BMP was not omitted with this submittal.

Prepared by:

X
X
John Pollock
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
58 Title:

Signature:

Date:

P.E.
7/27/2023
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
59 MWS Linear Plant Selections
Abundant plants, trees, and grasses bring value and an aesthetic benefit to any urban setting, but those in the MWS Linear do even more – they increase pollutant removal. What’s not seen, but very important, is that below grade the stormwater runoff/flow is being subjected to nature’s secret weapon: a dynamic physical, chemical, and biological process working to break down and remove non-point source pollutants.

The flow rate is controlled in the MWS Linear, giving the plants more “contact time” so that pollutants are more successfully decomposed, volatilized and incorporated into the biomass of The MWS Linear’s micro/macro flora and fauna. A wide range of plants are suitable for use in the MWS Linear, but selections vary by location and climate. View suitable plants by selecting the list relative to your project location’s hardy zone.

Plant Lists By Hardy Zone
Click on a Zone below to View PDF details
Hardy Zone 3 Hardy Zone 4 Hardy Zone 5
Hardy Zone 6 Hardy Zone 7 Hardy Zone 8 Hardy Zone 9
Hardy Zone 10
Hardy Zone 2
Average Annual Minimum Temperature Table & Map
(continue below for map)
Most Commonly Used Plants
We recommend plants that have deep roots and are adapted to course soil textures, so we have compiled this “most commonly used” species list for your convenience.

Yarrow - Achillea Millefolium
Western Giant Hyssop - Agastache occidentalis
Pacific Anemone - Anemone multifidi
Side Oats Grama - Bouteloua curtipendula
California Oatgrass - Danthia californica
Idaho Fescue - Festuca idahoensis
(LIST CONTINUES ON NEXT PAGE)
Coastal Strawberry - Fragaria chiloensis
Penstemon - Penstemon spp Phlox
- Phlox spp. Sandberg Bluegrass -
Poa secunda Sedum - Sedum spp.

Yellow-Eyed Grass - Sisyrinchium idahoense
Common Name
Latin Name Sun Hardy Range Height Flower Color
cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Modular Wetland System - Linear® Plants for Hardy Zone 2 The Modular Wetland System - Linear® standard 22' long system will require 18 to 20 plants. Different size systems will require different plant quanitities; please contact us for detailed information.The plants listed are tolerant to drought and have deep roots to allow for ehanced pollutant removal.These plants are subject to availability in local areas. If you would like to use a different plant please contact us. We will work with you to ensure the chosen plants work with the projects current landscape theme.

Common Name
Latin Name Sun Hardy Range Height Flower Color
cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple Modular Wetland System - Linear® Plants for Hardy Zone 3 oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

The Modular Wetland System - Linear® standard 22' long system will require 18 to 20 plants. Different size systems will require different plant quanitities; please contact us for detailed information.The plants listed are tolerant to drought and have deep roots to allow for ehanced pollutant removal.These plants are subject to availability in local areas. If you would like to use a different plant please contact us. We will work with you to ensure the chosen plants work with the projects current landscape theme.

Common Name
Latin Name Sun Hardy Range Height Flower Color
cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow Modular Wetland System - Linear® Plants for Hardy Zone 4 daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Sun Hardy Range Height Flower Color
drooping sedge, weeping sedge
Carex pendula partial shade USDA Zones 5-9 2 to 4 feet green Japanese blood grass, cogongrass, kunai
Imperata cylindrica full sun to partial shade USDA Zones 5-9 2 to 4 feet green cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown Oshima sedge, Oshima kan sedge
Carex oshimensis full sun to partial shade USDA Zones 5-9 1 to 2 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white Modular Wetland System - Linear® Plants for Hardy Zone 5 indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white rose campion, mullein pink, Dusty Miller
Lychnis coronaria full sun to partial shade USDA Zones 5-8 2 to 3 feet violet/red Russian sage
Perovskia atriplicifolia full sun USDA Zones 5-9 3 to 5 feet purple Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Sun Hardy Range Height Flower Color
Japanese sweet flag, Japanese rush
Acorus gramineus full sun to partial shade USDA Zones 6-9 .5 to 1.5 feet green drooping sedge, weeping sedge
Carex pendula partial shade USDA Zones 5-9 2 to 4 feet green Japanese blood grass, cogongrass, kunai
Imperata cylindrica full sun to partial shade USDA Zones 5-9 2 to 4 feet green cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown Oshima sedge, Oshima kan sedge
Carex oshimensis full sun to partial shade USDA Zones 5-9 1 to 2 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a Modular Wetland System - Linear® Plants for Hardy Zone 6 lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown sea oats, Chasmanthium paniculatum
Uniola paniculata full sun to partial shade USDA Zones 6-10 3 to 6 feet golden/brown Cape lily, Powell's crinum lily
Crinum X powellii full sun to partial shade USDA Zones 6-11 3 to 4 feet white/pink purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white rose campion, mullein pink, Dusty Miller
Lychnis coronaria full sun to partial shade USDA Zones 5-8 2 to 3 feet violet/red Russian sage
Perovskia atriplicifolia full sun USDA Zones 5-9 3 to 5 feet purple Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Sun Hardy Range Height Flower Color
Japanese sweet flag, Japanese rush
Acorus gramineus full sun to partial shade USDA Zones 6-9 .5 to 1.5 feet green drooping sedge, weeping sedge
Carex pendula partial shade USDA Zones 5-9 2 to 4 feet green Japanese blood grass, cogongrass, kunai
Imperata cylindrica full sun to partial shade USDA Zones 5-9 2 to 4 feet green cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown Oshima sedge, Oshima kan sedge
Carex oshimensis full sun to partial shade USDA Zones 5-9 1 to 2 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown society garlic, pink agapanthus
Tulbaghia violacea full sun to full shade USDA Zones 7-10 1.5 to 3 feet lavender Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple Modular Wetland System - Linear® Plants for Hardy Zone 7 Lindheimer's muhlygrass, blue muhlygrass
Muhlenbergia lindheimeri full sun USDA Zones 7-11 2 to 4 feet purple to gray horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
palm sedge
Carex phyllocephala full sun to full shade USDA Zones 7-10 1 to 2 feet green feather grass, Mexican needle grass
Nassella tenuissima full sun to partial shade USDA Zones 7-11 2 to 3 feet green/brown switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown sea oats, Chasmanthium paniculatum
Uniola paniculata full sun to partial shade USDA Zones 6-10 3 to 6 feet golden/brown Cape lily, Powell's crinum lily
Crinum X powellii full sun to partial shade USDA Zones 6-11 3 to 4 feet white/pink purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white rose campion, mullein pink, Dusty Miller
Lychnis coronaria full sun to partial shade USDA Zones 5-8 2 to 3 feet violet/red Russian sage
Perovskia atriplicifolia full sun USDA Zones 5-9 3 to 5 feet purple Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Sun Hardy Range Height Flower Color
Japanese sweet flag, Japanese rush
Acorus gramineus full sun to partial shade USDA Zones 6-9 .5 to 1.5 feet green drooping sedge, weeping sedge
Carex pendula partial shade USDA Zones 5-9 2 to 4 feet green Japanese blood grass, cogongrass, kunai
Imperata cylindrica full sun to partial shade USDA Zones 5-9 2 to 4 feet green cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown Oshima sedge, Oshima kan sedge
Carex oshimensis full sun to partial shade USDA Zones 5-9 1 to 2 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown canna, canna tropicana, canna lilly
Canna X generalis full sun to partial shade USDA Zones 8-11 2.5 to 8 feet yellow, orange, red Lily-of-the-Nile, African Lily, African Blue Lily
Agapanthus spp full sun to partial shade USDA Zones 8-11 2 to 4 feet blue Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown society garlic, pink agapanthus
Tulbaghia violacea full sun to full shade USDA Zones 7-10 1.5 to 3 feet lavender Modular Wetland System - Linear® Plants for Hardy Zone 8 Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple Lindheimer's muhlygrass, blue muhlygrass
Muhlenbergia lindheimeri full sun USDA Zones 7-11 2 to 4 feet purple to gray horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
palm sedge
Carex phyllocephala full sun to full shade USDA Zones 7-10 1 to 2 feet green umbrella sedge, umbrella plant
Cyperus involucratus full sun to partial shade USDA Zones 8-11 2 to 6 feet green/white feather grass, Mexican needle grass
Nassella tenuissima full sun to partial shade USDA Zones 7-11 2 to 3 feet green/brown switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown sea oats, Chasmanthium paniculatum
Uniola paniculata full sun to partial shade USDA Zones 6-10 3 to 6 feet golden/brown Cape lily, Powell's crinum lily
Crinum X powellii full sun to partial shade USDA Zones 6-11 3 to 4 feet white/pink African iris, fortnight lily, morea iris
Dietes iridioides full sun to partial shade USDA Zones 8-10 2 to 4 feet white/purple purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white rose campion, mullein pink, Dusty Miller
Lychnis coronaria full sun to partial shade USDA Zones 5-8 2 to 3 feet violet/red Russian sage
Perovskia atriplicifolia full sun USDA Zones 5-9 3 to 5 feet purple Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Sun Hardy Range Height Flower Color
Japanese sweet flag, Japanese rush
Acorus gramineus full sun to partial shade USDA Zones 6-9 .5 to 1.5 feet green papyrus, Egyptian papyrus, bulrushes
Cyperus papyrus full sun to partial shade USDA Zones 9-11 2 to 10 feet white drooping sedge, weeping sedge
Carex pendula partial shade USDA Zones 5-9 2 to 4 feet green Japanese blood grass, cogongrass, kunai
Imperata cylindrica full sun to partial shade USDA Zones 5-9 2 to 4 feet green cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown Oshima sedge, Oshima kan sedge
Carex oshimensis full sun to partial shade USDA Zones 5-9 1 to 2 feet brown little bluestem, seacoast bluestem
Schizachyrium scoparium full sun to partial shade USDA Zones 3-9 .5 to 3 feet brown canna, canna tropicana, canna lilly
Canna X generalis full sun to partial shade USDA Zones 8-11 2.5 to 8 feet yellow, orange, red Lily-of-the-Nile, African Lily, African Blue Lily
Agapanthus spp full sun to partial shade USDA Zones 8-11 2 to 4 feet blue Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown society garlic, pink agapanthus
Tulbaghia violacea full sun to full shade USDA Zones 7-10 1.5 to 3 feet lavender Modular Wetland System - Linear® Plants for Hardy Zone 9 Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple Lindheimer's muhlygrass, blue muhlygrass
Muhlenbergia lindheimeri full sun USDA Zones 7-11 2 to 4 feet purple to gray horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
big bluestem, turkey foot bluestem
Andropogon gerardii sun USDA Zones 3-9 4 to 6 feet red
palm sedge
Carex phyllocephala full sun to full shade USDA Zones 7-10 1 to 2 feet green umbrella sedge, umbrella plant
Cyperus involucratus full sun to partial shade USDA Zones 8-11 2 to 6 feet green/white feather grass, Mexican needle grass
Nassella tenuissima full sun to partial shade USDA Zones 7-11 2 to 3 feet green/brown switchgrass, prairie switchgrass
Panicum virgatum full sun to partial shade USDA Zones 4-9 3 to 4 feet green/white indiangrass, yellow indiangrass
Sorghastrum nutans full sun to partial shade USDA Zones 3-9 2 to 6 feet redish/brown sea oats, Chasmanthium paniculatum
Uniola paniculata full sun to partial shade USDA Zones 6-10 3 to 6 feet golden/brown Cape lily, Powell's crinum lily
Crinum X powellii full sun to partial shade USDA Zones 6-11 3 to 4 feet white/pink African iris, fortnight lily, morea iris
Dietes iridioides full sun to partial shade USDA Zones 8-10 2 to 4 feet white/purple purple coneflower
Echinacea purpurea full sun to partial shade USDA Zones 3-9 2 to 3 feet pink Joe Pye weed, queen-of-the-meadow
Eupatorium fistulosum full sun to partial shade USDA Zones 3-9 3 to 10 feet pink/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink oxeye sunflower, false sunflower
Heliopsis helianthoides full sun to partial shade USDA Zones 2-9 3 to 5 feet yellow daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various summer snowflake, giant snowflake
Leucojum aestivum full sun to partial shade USDA Zones 4-9 1 to 2 feet white Russian sage
Perovskia atriplicifolia full sun USDA Zones 5-9 3 to 5 feet purple Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

Common Name
Latin Name Light Exposure Hardy Range Height Flower Color canna, canna tropicana, canna lilly
Canna X generalis full sun to partial shade USDA Zones 8-11 2.5 to 8 feet yellow, orange, red Lily-of-the-Nile, African Lily, African Blue Lily
Agapanthus spp full sun to partial shade USDA Zones 8-11 2 to 4 feet blue Vetiveria zizanioides (L.) Nash
Vetiver Grass full sun USDA Zones 5-11 2 to 8 feet green giant wild rye
Leymus condensatus full sun USDA Zones 3-11 4 to 8 feet brown society garlic, pink agapanthus
Tulbaghia violacea full sun to full shade USDA Zones 7-10 1.5 to 3 feet lavender Gulf muhlygrass, mist grass, hairawn muhly
Muhlenbergia capillaris full sun to partial shade USDA Zones 5-10 2 to 3 feet pinkish purple Lindheimer's muhlygrass, blue muhlygrass
Muhlenbergia lindheimeri full sun USDA Zones 7-11 2 to 4 feet purple to gray horsetail, scouring rush, E. prealtum
Equisetum hyemale full sun to light shade USDA Zones 3-11 2 to 4 feet n/a cattail, reed-mace
Typha latifolia full sun USDA Zones 2-11 3 to 9 feet brown papyrus, Egyptian papyrus, bulrushes
Cyperus papyrus full sun to partial shade USDA Zones 9-11 2 to 10 feet white lavender
Lavandula L. sun USDA Zones 5-10 1 to 2 feet purple
Modular Wetland System - Linear® Plants for Hardy Zone 10 palm sedge
Carex phyllocephala full sun to full shade USDA Zones 7-10 1 to 2 feet green lemongrass, oil grass Cymbopogon citratus full sun to partial shade USDA Zones 10-11 4 to 6 feet n/a umbrella sedge, umbrella plant
Cyperus involucratus full sun to partial shade USDA Zones 8-11 2 to 6 feet green/white feather grass, Mexican needle grass
Nassella tenuissima full sun to partial shade USDA Zones 7-11 2 to 3 feet green/brown sea oats, Chasmanthium paniculatum
Uniola paniculata full sun to partial shade USDA Zones 6-10 3 to 6 feet golden/brown Cape lily, Powell's crinum lily
Crinum X powellii full sun to partial shade USDA Zones 6-11 3 to 4 feet white/pink African iris, fortnight lily, morea iris
Dietes iridioides full sun to partial shade USDA Zones 8-10 2 to 4 feet white/purple whirling butterflies, white gaura
Gaura lindheimeri full sun to partial shade USDA Zones 5-10 2 to 4 feet white/pink daylily
Hemerocallis hybrids full sun to partial shade USDA Zones 2-10 1 to 3.5 feet various Adam's needle, bear grass, weak-leaf yucca
Yucca filamentosa full sun USDA Zones 5-10 3 to 5 feet white brome hummock sedge
carex bromoides full sun to partial shade USDA Zones 2-10 1 ft green The Modular Wetland System - Linear® should be irrigated like any other planter area. The plants in the system must receive adequate irrigation to ensure plant survival during periods of drier weather. As with all landscape areas the plants within the Modular Wetland System - Linear will require more frequent watering during the establishment period.

For more information please contact at: 760-433-7640 or email: [email protected] The Modular Wetland System - Linear® standard 22' long system will require 18 to 20 plants. Different size systems will require different plant quanitities; please contact us for detailed information.The plants listed are tolerant to drought and have deep roots to allow for ehanced pollutant removal.These plants are subject to availability in local areas. If you would like to use a different plant please contact us. We will work with you to ensure the chosen plants work with the projects current landscape theme.

November 2022

GENERAL USE LEVEL DESIGNATION FOR BASIC (TSS)

ENHANCED AND PHOSPHORUSTREATMENT
For
Contech Engineered Solutions, LLC (Contech) Modular Wetlands Linear
Ecology’s Decision
Based on Modular Wetland Systems, Inc, application submissions, including the Technical Evaluation Report, dated April 1, 2014, Ecology hereby issues the following use level designation:

1. General Use Level Designation (GULD) for the Modular Wetlands Linear Stormwater Treatment System for Basic, Phosphorus, and Enhanced treatment • Sized at a hydraulic loading rate of:
• 1 gallon per minute (gpm) per square foot (sq ft) of Wetland Cell Surface Area
• Prefilter box (approved at either 22 inches or 33 inches tall) • 3.0 gpm/sq ft of prefilter box surface area for moderate pollutant loading rates (low to medium density residential basins).
• 2.1 gpm/sq ft of prefilter box surface area for high pollutant loading rates (commercial and industrial basins).

2. Ecology approves the Modular Wetlands Linear Stormwater Treatment System units for Basic, Phosphorus, and Enhanced treatment at the hydraulic loading rate listed above. Designers shall calculate the water quality design flow rates using the following procedures:
• Western Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute water quality treatment design flow rate as calculated using the latest version of the Western Washington Hydrology Model or other Ecology- approved continuous runoff model.
• Eastern Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute water quality treatment design flow rate as calculated using one of the three methods described in Chapter 2.7.6 of the Stormwater Management Manual for Eastern Washington (SWMMEW) or local manual.
• Entire State: For treatment installed downstream of detention, the water quality treatment design flow rate is the full 2-year release rate of the detention facility.

3. These use level designations have no expiration date but may be amended or revoked by Ecology, and are subject to the conditions specified below.

Ecology’s Conditions of Use
Applicants shall comply with the following conditions:
1) Design, assemble, install, operate, and maintain the Modular Wetlands Linear Stormwater Treatment System units, in accordance with Contech’s. applicable manuals and documents and the Ecology Decision.
2) Each site plan must undergo Contech review and approval before site installation.

This ensures that site grading and slope are appropriate for use of a Modular Wetlands Linear Stormwater Treatment System unit.
3) Modular Wetlands Linear Stormwater Treatment System media shall conform to the specifications submitted to and approved by Ecology.
4) The applicant tested the Modular Wetlands Linear Stormwater Treatment System with an external bypass weir. This weir limited the depth of water flowing through the media, and therefore the active treatment area, to below the root zone of the plants. This GULD applies to Modular Wetlands Linear Stormwater Treatment Systems whether plants are included in the final product or not.
5) Maintenance: The required maintenance interval for stormwater treatment devices is often dependent upon the degree of pollutant loading from a particular drainage basin. Therefore, Ecology does not endorse or recommend a “one size fits all” maintenance cycle for a particular model/size of stormwater treatment technology. • Typically, Contech designs Modular Wetland systems for a target prefilter media life of 6 to 12 months.
• Indications of the need for maintenance include effluent flow decreasing to below the design flow rate or decrease in treatment below required levels. • Owners/operators must inspect Modular Wetland systems for a minimum of twelve months from the start of post-construction operation to determine site-specific maintenance schedules and requirements. You must conduct inspections monthly during the wet season, and every other month during the dry season (According to the SWMMWW, the wet season in western Washington is October 1 to April 30. According to the SWMMEW, the wet season in eastern Washington is October 1 to June 30). After the first year of operation, owners/operators must conduct inspections based on the findings during the first year of inspections.
• Conduct inspections by qualified personnel, follow manufacturer’s guidelines, and use methods capable of determining either a decrease in treated effluent flowrate and/or a decrease in pollutant removal ability. • When inspections are performed, the following findings typically serve as maintenance triggers:
• Standing water remains in the vault between rain events, or • Bypass occurs during storms smaller than the design storm. • If excessive floatables (trash and debris) are present (but no standing water or excessive sedimentation), perform a minor maintenance consisting of gross solids removal, not prefilter media replacement. • Additional data collection will be used to create a correlation between pretreatment chamber sediment depth and pre-filter clogging (see Issues to be Addressed by the Company section below)
6) Discharges from the Modular Wetlands Linear Stormwater Treatment System units shall not cause or contribute to water quality standards violations in receiving waters.

Applicant: Contech Engineered Solutions, LLC
Applicant’s Address: 11815 NE Glenn Widing Dr.

Portland, OR 97220
Application Documents:

Original Application for Conditional Use Level Designation, Modular Wetland System, Linear Stormwater Filtration System Modular Wetland Systems, Inc., January 2011 Quality Assurance Project Plan: Modular Wetland System – Linear Treatment System Performance Monitoring Project, draft, January 2011
Revised Application for Conditional Use Level Designation, Modular Wetland System, Linear Stormwater Filtration System Modular Wetland Systems, Inc., May 2011 Memorandum: Modular Wetland System-Linear GULD Application Supplementary Data, April 2014
Technical Evaluation Report: Modular Wetland System Stormwater Treatment System Performance Monitoring, April 2014
Applicant’s Use Level Request:
• General Use Level Designation as a Basic, Enhanced, and Phosphorus treatment device in accordance with Ecology’s Guidance for Evaluating Emerging Stormwater Treatment Technologies Technology Assessment Protocol – Ecology (TAPE) January 2011 Revision.

Applicant’s Performance Claims:
• The Modular Wetlands Linear is capable of removing a minimum of 80-percent of TSS from stormwater with influent concentrations between 100 and 200 mg/L. • The Modular Wetlands Linear is capable of removing a minimum of 50-percent of total phosphorus from stormwater with influent concentrations between 0.1 and 0.5 mg/L.
• The Modular Wetlands Linear is capable of removing a minimum 30-percent of dissolved copper from stormwater with influent concentrations between 0.005 and

0.020 mg/L.
• The Modular Wetlands Linear is capable of removing a minimum 60-percent of dissolved zinc from stormwater with influent concentrations between 0.02 and 0.30 mg/L.

Ecology’s Recommendations:
• Contech has shown Ecology, through laboratory and field-testing, that the Modular Wetlands Linear Stormwater Treatment System filter system is capable of attaining Ecology’s Basic, Phosphorus, and Enhanced treatment goals.

Findings of Fact:

Laboratory Testing
The Modular Wetlands Linear Stormwater Treatment System has the:
• Capability to remove 99 percent of total suspended solids (using Sil-Co-Sil 106) in a quarter-scale model with influent concentrations of 270 mg/L. • Capability to remove 91 percent of total suspended solids (using Sil-Co-Sil 106) in laboratory conditions with influent concentrations of 84.6 mg/L at a flow rate of 3.0 gpm per square foot of media.
• Capability to remove 93 percent of dissolved Copper in a quarter-scale model with influent concentrations of 0.757 mg/L.
• Capability to remove 79 percent of dissolved Copper in laboratory conditions with influent concentrations of 0.567 mg/L at a flow rate of 3.0 gpm per square foot of media. • Capability to remove 80.5-percent of dissolved Zinc in a quarter-scale model with influent concentrations of 0.95 mg/L at a flow rate of 3.0 gpm per square foot of media. • Capability to remove 78-percent of dissolved Zinc in laboratory conditions with influent concentrations of 0.75 mg/L at a flow rate of 3.0 gpm per square foot of media.

Field Testing
• Modular Wetland Systems, Inc. conducted monitoring of an MWS-Linear (Model # MWS-L-4-13) from April 2012 through May 2013, at a transportation maintenance facility in Portland, Oregon. The manufacturer collected flow-weighted composite samples of the system’s influent and effluent during 28 separate storm events. The system treated approximately 75 percent of the runoff from 53.5 inches of rainfall during the monitoring period. The applicant sized the system at 1 gpm/sq ft. (wetland media) and 3gpm/sq ft. (prefilter).
• Influent TSS concentrations for qualifying sampled storm events ranged from 20 to 339 mg/L. Average TSS removal for influent concentrations greater than 100 mg/L (n=7) averaged 85 percent. For influent concentrations in the range of 20-100 mg/L (n=18), the upper 95 percent confidence interval about the mean effluent concentration was

12.8 mg/L.
• Total phosphorus removal for 17 events with influent TP concentrations in the range of

0.1 to 0.5 mg/L averaged 65 percent. A bootstrap estimate of the lower 95 percent confidence limit (LCL95) of the mean total phosphorus reduction was 58 percent. • The lower 95 percent confidence limit of the mean percent removal was 60.5 percent for dissolved zinc for influent concentrations in the range of 0.02 to 0.3 mg/L (n=11).

The lower 95 percent confidence limit of the mean percent removal was 32.5 percent for dissolved copper for influent concentrations in the range of 0.005 to 0.02 mg/L (n=14) at flow rates up to 28 gpm (design flow rate 41 gpm). Laboratory test data augmented the data set, showing dissolved copper removal at the design flow rate of 41 gpm (93 percent reduction in influent dissolved copper of 0.757 mg/L).

Issues to be addressed by the Company:

1. Contech should collect maintenance and inspection data for the first year on all installations in the Northwest in order to assess standard maintenance requirements for various land uses in the region. Contech should use these data to establish required maintenance cycles.

2. Contech should collect pre-treatment chamber sediment depth data for the first year of operation for all installations in the Northwest. Contech will use these data to create a correlation between sediment depth and pre-filter clogging.

Technology Description:

Download at https://www.conteches.com/modular-wetlands
Contact Information:

Applicant: Jeremiah Lehman
Contech Engineered Solutions, LLC
11815 NE Glenn Widing Dr.

Portland, OR 97220
[email protected]
Applicant website: http://www.conteches.com
Ecology web link: http://www.ecy.wa.gov/programs/wg/stormwater/newtech/index.html Ecology: Douglas C. Howie, P.E.

Department of Ecology
Water Quality Program
(360) 870-0983
[email protected]
Revision History
Date Revision
June 2011 Original use-level-designation document
September 2012 Revised dates for TER and expiration
January 2013 Modified Design Storm Description, added Revision Table, added maintenance discussion, modified format in accordance with Ecology standard
December 2013 Updated name of Applicant
April 2014 Approved GULD designation for Basic, Phosphorus, and Enhanced treatment
December 2015 Updated GULD to document the acceptance of MWS – Linear Modular Wetland installations with or without the inclusion of plants July 2017 Revised Manufacturer Contact Information (name, address, and email) December 2019 Revised Manufacturer Contact Address
July 2021 Added additional prefilter sized at 33 inches August 2021 Changed “Prefilter” to “Prefilter box”
November 2022 Changed Contacts to Contech ES
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
60 Appendix 6: LID BMP Design
Details
BMP Sizing, Design Details and other Supporting Documentation to supplement Section D Date
Enter the Area Tributary to this Feature AT = 1.24 acres Effective Impervious Fraction If
= 0.81
Use the following equation based on the WEF/ASCE Method C = 0.858If
3 - 0.78If2 + 0.774If
+ 0.04 C = 0.61
QBMP = C x I x AT 0.2 ft3
/s
Notes:

Calculate the composite Runoff Coefficient, C for the BMP Tributary Area BMP Design Flow Rate
QBMP =
Drainage Area Number/Name DMA 1 / BMP 1
Determine the Effective Impervious Fraction
Type of post-development surface cover
(use pull down menu)
Mixed Surface Types
Designed by LUPITA ASTORGA County/City Case No RIVERSIDE CA Company Project Number/Name 195440005/CARMAX MURRIETA
Santa Margarita Watershed
BMP Design Flow Rate, QBMP (Rev. 03-2012)
Legend:

Required Entries
Calculated Cells
Company Name KIMLEY-HORN 7/17/2024
Date
Enter the Area Tributary to this Feature AT = 3.57 acres Effective Impervious Fraction If
= 0.84
Use the following equation based on the WEF/ASCE Method C = 0.858If
3 - 0.78If2 + 0.774If
+ 0.04 C = 0.65
QBMP = C x I x AT 0.5 ft3
/s
Notes:

Calculate the composite Runoff Coefficient, C for the BMP Tributary Area BMP Design Flow Rate
QBMP =
Drainage Area Number/Name DMA-2
Determine the Effective Impervious Fraction
Type of post-development surface cover
(use pull down menu)
Mixed Surface Types
Designed by LUPITA ASTORGA County/City Case No RIVERSIDE CA Company Project Number/Name 195440005/CARMAX MURRIETA
Santa Margarita Watershed
BMP Design Flow Rate, QBMP (Rev. 03-2012)
Legend:

Required Entries
Calculated Cells
Company Name KIMLEY-HORN 8/29/2024

PLAN VIEW

ELEVATION VIEW

RIGHT END VIEW

LEFT END VIEW

SITE SPECIFIC DATA

GENERAL NOTES

INSTALLATION NOTES

STANDARD DETAIL

STORMWATER BIOFILTRATION SYSTEM
MWS-L-8-12-V

FOR PATENT INFORMATION, GO TO
www.ContechES.com/IP

0.346 OFFLINE N/A N/A N/A PEDESTRIAN 3.4 2.0 1.0 0.346 * PRELIMINARY NOT FOR CONSTRUCTION

PLAN VIEW

ELEVATION VIEW

RIGHT END VIEW

LEFT END VIEW

SITE SPECIFIC DATA

GENERAL NOTES

INSTALLATION NOTES

STANDARD DETAIL

STORMWATER BIOFILTRATION SYSTEM
MWS-L-8-16-V

FOR PATENT INFORMATION, GO TO
www.ContechES.com/IP

0.462 OFFLINE N/A N/A N/A PEDESTRIAN 3.4 2.0 1.0 0.462 null null * PRELIMINARY NOT FOR CONSTRUCTION null 1 1
2 2
3 3
4 4
A A
B B
C C
D D
SHEET 1 OF 1
DWG NO

ADS FLEXSTORM PURE
SIZE
SCALE
REV
A

ALL PRODUCTS MANUFACTURED

BY ADVANCED DRAINAGE SYSTEMS
WWW.ADSPIPE.COM
PH. 1-800-821-6710
DATE
C 02/06/2023
N/A
NOTES:

1. ALL FRAMING IS CONSTRUCTED OF 304 STAINLESS STEEL.

2. TOTAL BYPASS CAPACITY WILL VARY WITH EACH SIZE DRAINAGE STRUCTURE. ADS DESIGNS FRAMING BYPASS TO MEET OR EXCEED THE DESIGN FLOW OF THE PARTICULAR DRAINAGE STRUCTURE.

3. UPON ORDERING, CONFIRMATION OF THE INLET SPECIFICATION, PRECAST/FOUNDRY CASTING MAKE AND MODEL, OR DETAILED DIMENSIONAL FORMS MUST BE PROVIDED TO CONFIGURE AND ASSEMBLE AN INLET FILTER.

4. ALL FILTERS MEET ASTM D8057 SPECIFICATIONS.

5. FOR WRITTEN SPECIFICATIONS AND MAINTENANCE GUIDELINES VISIT WWW.ADSPIPE.COM.

INSTALLATION INSTRUCTIONS:

1. REMOVE GRATE

2. CLEAN GRATE LEDGE

3. SET INLET FILTER ON LOAD

BEARING LEDGE OF STRUCTURE

4. REPLACE GRATE

ADS FLEXSTORM PURE INLET FILTERS
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
61 Appendix 7:

Hydromodification & Critical Coarse Sediment
Supporting Detail for Hydromodification compliance & Exhibit G - CCSY & PSS Areas with the project location. 6/29/23, 11:29 AM Rivco SWCTT
https://content.rcflood.org/PermitTracker/ 1/1
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Leaflet | Original Feature Class was created by the Riverside County Transportation Department (RCDT). State of California Project site

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D I A M O N D V A L L E Y

L A K E

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LAKE SKINNER
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Sources: Esri, DeLorme, HERE, TomTom, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, and the GIS User ° 0 1 2 3 4
Miles Map 2 - Channel Susceptibility & Areas Exempted from Hydromodification Requirements Legend
Channel Type
Potentially Susceptible
Not Susceptible (Over 20,000 cfs)
Not Susceptible
Hydromodification Requirements ExemptArea
Potentially Not Exempt
Potentially Exempt
Lakes/Reservoirs
SMR
Riverside County
Hydromodification Susceptibility Documentation Report and Mapping - Santa Margarita Region Hydromodification Management Plan SMR Copermittees
Project location
Water Quality Management Plan (WQMP)
CarMax Murietta #1824
63 project site
SMRHM

PROJECT REPORT
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 2
General Model Information
Project Name: default[0]
Site Name:

Site Address:

City:

Report Date: 7/18/2024
Gage: Temecula Valley
Data Start: 1974/10/01
Data End: 2011/09/30
Timestep: 15 Minute
Precip Scale: 1.000
Version Date: 2021/06/14
POC Thresholds
Low Flow Threshold for POC1: 10 Percent of the 2 Year
High Flow Threshold for POC1: 10 Year
Low Flow Threshold for POC2: 10 Percent of the 2 Year
High Flow Threshold for POC2: 10 Year
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 3
Landuse Basin Data
Predeveloped Land Use
DMA 1
Bypass: No
GroundWater: No
Pervious Land Use acre
C D,Grass,Flat(0-5%) 1.24
Pervious Total 1.24
Impervious Land Use acre
Impervious Total 0
Basin Total 1.24
Element Flows To:

Surface Interflow Groundwater
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 4
DMA 2
Bypass: No
GroundWater: No
Pervious Land Use acre
C D,Grass,Flat(0-5%) 3.22
Pervious Total 3.22
Impervious Land Use acre
Impervious Total 0
Basin Total 3.22
Element Flows To:

Surface Interflow Groundwater
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 5
Mitigated Land Use
DMA 1
Bypass: No
GroundWater: No
Pervious Land Use acre
C D,Grass,Flat(0-5%) 0.26
Pervious Total 0.26
Impervious Land Use acre
Roads,Flat(0-5%) 0.98
Impervious Total 0.98
Basin Total 1.24
Element Flows To:

Surface Interflow Groundwater
Tank 1 Tank 1
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 6
DMA 2
Bypass: No
GroundWater: No
Pervious Land Use acre
C D,Grass,Flat(0-5%) 0.26
Pervious Total 0.26
Impervious Land Use acre
Roads,Flat(0-5%) 2.98
Impervious Total 2.98
Basin Total 3.24
Element Flows To:

Surface Interflow Groundwater
Tank 2 Tank 2
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 7
Routing Elements
Predeveloped Routing
DRAFT
default[0] 7/18/2024 11:10:14 AM Page 8
Mitigated Routing
Tank 1
Dimensions
Depth: 4 ft.

Tank Type: Circular
Diameter: 4 ft.

Length: 1792.44302392901 ft.

Infiltration On
Infiltration rate: 0.01
Infiltration safety factor: 1
Total Volume Infiltrated (ac-ft.): 2.996
Total Volume Through Riser (ac-ft.): 40.677
Total Volume Through Facility (ac-ft.): 43.674
Percent Infiltrated: 6.86
Total Precip Applied to Facility: 0
Total Evap From Facility: 0
Discharge Structure
Riser Height: 3 ft.

Riser Diameter: 54 in.

Notch Type: Rectangular
Notch Width: 3.526 ft.

Notch Height: 0.768 ft.

Orifice 1 Diameter: 0.82921 in. Elevation:0 ft.

Element Flows To:

Outlet 1 Outlet 2
Tank Hydraulic Table
Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs)

0.0000 0.000000 0.000000 0.000 0.000

0.0444 0.034506 0.001025 0.003 0.000

0.0889 0.048525 0.002889 0.005 0.000

0.1333 0.059092 0.005289 0.006 0.000

0.1778 0.067840 0.008115 0.007 0.000

0.2222 0.075405 0.011301 0.008 0.000

0.2667 0.082115 0.014805 0.009 0.000

0.3111 0.088164 0.018591 0.010 0.000

0.3556 0.093682 0.022634 0.011 0.000

0.4000 0.098757 0.026912 0.011 0.001

0.4444 0.103455 0.031406 0.012 0.001

0.4889 0.107824 0.036103 0.013 0.001

0.5333 0.111903 0.040986 0.013 0.001

0.5778 0.115724 0.046046 0.014 0.001

0.6222 0.119310 0.051270 0.014 0.001

0.6667 0.122682 0.056648 0.015 0.001

0.7111 0.125858 0.062172 0.015 0.001

0.7556 0.128852 0.067833 0.016 0.001

0.8000 0.131676 0.073623 0.016 0.001

0.8444 0.134342 0.079535 0.017 0.001

0.8889 0.136858 0.085562 0.017 0.001

0.9333 0.139232 0.091698 0.018 0.001

0.9778 0.141472 0.097936 0.018 0.001

1.0222 0.143584 0.104271 0.018 0.001

1.0667 0.145574 0.110697 0.019 0.001

1.1111 0.147446 0.117209 0.019 0.001
DRAFT
default[0] 7/18/2024 11:10:15 AM Page 9

1.1556 0.149204 0.123802 0.020 0.001

1.2000 0.150854 0.130470 0.020 0.001

1.2444 0.152398 0.137210 0.020 0.001

1.2889 0.153840 0.144015 0.021 0.001

1.3333 0.155182 0.150883 0.021 0.001

1.3778 0.156427 0.157808 0.021 0.001

1.4222 0.157577 0.164786 0.022 0.001

1.4667 0.158635 0.171813 0.022 0.001

1.5111 0.159602 0.178886 0.022 0.001

1.5556 0.160480 0.185999 0.023 0.001

1.6000 0.161270 0.193149 0.023 0.001

1.6444 0.161973 0.200333 0.023 0.001

1.6889 0.162592 0.207546 0.024 0.001

1.7333 0.163126 0.214784 0.024 0.001

1.7778 0.163576 0.222044 0.024 0.001

1.8222 0.163944 0.229323 0.025 0.001

1.8667 0.164229 0.236616 0.025 0.001

1.9111 0.164433 0.243920 0.025 0.001

1.9556 0.164555 0.251231 0.026 0.001

2.0000 0.164595 0.258546 0.026 0.001

2.0444 0.164555 0.265860 0.026 0.001

2.0889 0.164433 0.273172 0.027 0.001

2.1333 0.164229 0.280475 0.027 0.001

2.1778 0.163944 0.287769 0.027 0.001

2.2222 0.163576 0.295047 0.027 0.001

2.2667 0.163126 0.302307 0.104 0.001

2.3111 0.162592 0.309546 0.290 0.001

2.3556 0.161973 0.316759 0.539 0.001

2.4000 0.161270 0.323942 0.838 0.001

2.4444 0.160480 0.331093 1.180 0.001

2.4889 0.159602 0.338206 1.559 0.001

2.5333 0.158635 0.345278 1.973 0.001

2.5778 0.157577 0.352305 2.418 0.001

2.6222 0.156427 0.359284 2.894 0.001

2.6667 0.155182 0.366209 3.397 0.001

2.7111 0.153840 0.373076 3.926 0.001

2.7556 0.152398 0.379882 4.480 0.001

2.8000 0.150854 0.386621 5.059 0.001

2.8444 0.149204 0.393289 5.661 0.001

2.8889 0.147446 0.399882 6.284 0.001

2.9333 0.145574 0.406394 6.930 0.001

2.9778 0.143584 0.412820 7.596 0.001

3.0222 0.141472 0.419155 8.095 0.001

3.0667 0.139232 0.425394 8.759 0.001

3.1111 0.136858 0.431529 9.705 0.001

3.1556 0.134342 0.437557 10.86 0.001

3.2000 0.131676 0.443469 12.20 0.001

3.2444 0.128852 0.449259 13.70 0.001

3.2889 0.125858 0.454920 15.33 0.001

3.3333 0.122682 0.460444 17.10 0.001

3.3778 0.119310 0.465822 18.98 0.001

3.4222 0.115724 0.471046 20.97 0.001

3.4667 0.111903 0.476105 23.06 0.001

3.5111 0.107824 0.480989 25.23 0.001

3.5556 0.103455 0.485685 27.49 0.001

3.6000 0.098757 0.490180 29.83 0.001

3.6444 0.093682 0.494458 32.23 0.001

3.6889 0.088164 0.498501 34.69 0.001
DRAFT
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3.7333 0.082115 0.502287 37.20 0.001

3.7778 0.075405 0.505790 39.75 0.001

3.8222 0.067840 0.508977 42.34 0.001

3.8667 0.059092 0.511803 44.96 0.001

3.9111 0.048525 0.514203 47.59 0.001

3.9556 0.034506 0.516067 50.23 0.001

4.0000 0.000000 0.517091 52.87 0.001

4.0444 0.000000 0.000000 55.51 0.001
DRAFT
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Tank 2
Dimensions
Depth: 5 ft.

Tank Type: Circular
Diameter: 5 ft.

Length: 3300.13436463412 ft.

Infiltration On
Infiltration rate: 0.01
Infiltration safety factor: 1
Total Volume Infiltrated (ac-ft.): 21.107
Total Volume Through Riser (ac-ft.): 107.196
Total Volume Through Facility (ac-ft.): 128.303
Percent Infiltrated: 16.45
Total Precip Applied to Facility: 0
Total Evap From Facility: 0
Discharge Structure
Riser Height: 4 ft.

Riser Diameter: 54 in.

Notch Type: Rectangular
Notch Width: 4.114 ft.

Notch Height: 0.800 ft.

Orifice 1 Diameter: 1.224 in. Elevation:0 ft.

Element Flows To:

Outlet 1 Outlet 2
Tank Hydraulic Table
Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs)

0.0000 0.000000 0.000000 0.000 0.000

0.0556 0.079414 0.002948 0.009 0.000

0.1111 0.111675 0.008310 0.013 0.001

0.1667 0.135995 0.015214 0.016 0.001

0.2222 0.156128 0.023344 0.019 0.001

0.2778 0.173538 0.032512 0.021 0.001

0.3333 0.188980 0.042590 0.023 0.001

0.3889 0.202903 0.053481 0.025 0.002

0.4444 0.215602 0.065112 0.027 0.002

0.5000 0.227282 0.077418 0.028 0.002

0.5556 0.238093 0.090349 0.030 0.002

0.6111 0.248148 0.103859 0.031 0.002

0.6667 0.257537 0.117909 0.033 0.002

0.7222 0.266329 0.132463 0.034 0.002

0.7778 0.274582 0.147491 0.035 0.002

0.8333 0.282343 0.162963 0.037 0.002

0.8889 0.289652 0.178854 0.038 0.002

0.9444 0.296543 0.195139 0.039 0.003

1.0000 0.303043 0.211796 0.040 0.003

1.0556 0.309177 0.228804 0.041 0.003

1.1111 0.314967 0.246143 0.042 0.003

1.1667 0.320432 0.263794 0.043 0.003

1.2222 0.325587 0.281741 0.044 0.003

1.2778 0.330448 0.299965 0.046 0.003

1.3333 0.335026 0.318452 0.046 0.003

1.3889 0.339334 0.337185 0.047 0.003

1.4444 0.343382 0.356151 0.048 0.003

1.5000 0.347179 0.375334 0.049 0.003
DRAFT
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1.5556 0.350733 0.394722 0.050 0.003

1.6111 0.354050 0.414300 0.051 0.003

1.6667 0.357139 0.434056 0.052 0.003

1.7222 0.360005 0.453978 0.053 0.003

1.7778 0.362652 0.474053 0.054 0.003

1.8333 0.365086 0.494269 0.055 0.003

1.8889 0.367312 0.514614 0.055 0.003

1.9444 0.369332 0.535077 0.056 0.003

2.0000 0.371150 0.555647 0.057 0.003

2.0556 0.372769 0.576313 0.058 0.003

2.1111 0.374192 0.597062 0.059 0.003

2.1667 0.375421 0.617886 0.059 0.003

2.2222 0.376458 0.638772 0.060 0.003

2.2778 0.377304 0.659711 0.061 0.003

2.3333 0.377961 0.680691 0.062 0.003

2.3889 0.378429 0.701703 0.062 0.003

2.4444 0.378710 0.722736 0.063 0.003

2.5000 0.378803 0.743779 0.064 0.003

2.5556 0.378710 0.764821 0.065 0.003

2.6111 0.378429 0.785854 0.065 0.003

2.6667 0.377961 0.806866 0.066 0.003

2.7222 0.377304 0.827846 0.067 0.003

2.7778 0.376458 0.848785 0.067 0.003

2.8333 0.375421 0.869671 0.068 0.003

2.8889 0.374192 0.890495 0.069 0.003

2.9444 0.372769 0.911244 0.069 0.003

3.0000 0.371150 0.931910 0.070 0.003

3.0556 0.369332 0.952480 0.071 0.003

3.1111 0.367312 0.972943 0.071 0.003

3.1667 0.365086 0.993288 0.072 0.003

3.2222 0.362652 1.013504 0.118 0.003

3.2778 0.360005 1.033579 0.370 0.003

3.3333 0.357139 1.053501 0.741 0.003

3.3889 0.354050 1.073257 1.199 0.003

3.4444 0.350733 1.092835 1.731 0.003

3.5000 0.347179 1.112223 2.327 0.003

3.5556 0.343382 1.131406 2.981 0.003

3.6111 0.339334 1.150372 3.688 0.003

3.6667 0.335026 1.169105 4.445 0.003

3.7222 0.330448 1.187592 5.248 0.003

3.7778 0.325587 1.205817 6.096 0.003

3.8333 0.320432 1.223763 6.985 0.003

3.8889 0.314967 1.241414 7.913 0.003

3.9444 0.309177 1.258753 8.880 0.003

4.0000 0.303043 1.275761 9.884 0.003

4.0556 0.296543 1.292418 10.51 0.003

4.1111 0.289652 1.308703 11.65 0.003

4.1667 0.282343 1.324594 13.13 0.003

4.2222 0.274582 1.340066 14.88 0.003

4.2778 0.266329 1.355094 16.86 0.003

4.3333 0.257537 1.369648 19.05 0.003

4.3889 0.248148 1.383698 21.42 0.003

4.4444 0.238093 1.397208 23.95 0.003

4.5000 0.227282 1.410139 26.63 0.003

4.5556 0.215602 1.422445 29.44 0.003

4.6111 0.202903 1.434076 32.37 0.003

4.6667 0.188980 1.444968 35.40 0.003

4.7222 0.173538 1.455045 38.52 0.003
DRAFT
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4.7778 0.156128 1.464213 41.71 0.003

4.8333 0.135995 1.472343 44.94 0.003

4.8889 0.111675 1.479247 48.22 0.003

4.9444 0.079414 1.484609 51.52 0.003

5.0000 0.000000 1.487557 54.82 0.003

5.0556 0.000000 0.000000 58.12 0.003
DRAFT
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Analysis Results
POC 1
+ Predeveloped x Mitigated
Predeveloped Landuse Totals for POC #1
Total Pervious Area: 1.24
Total Impervious Area: 0
Mitigated Landuse Totals for POC #1
Total Pervious Area: 0.26
Total Impervious Area: 0.98
Flow Frequency Method: Cunnane
Flow Frequency Return Periods for Predeveloped. POC #1
Return Period Flow(cfs)
2 year 0.275843
5 year 0.543845
10 year 0.699274
25 year 1.000518
Flow Frequency Return Periods for Mitigated. POC #1
Return Period Flow(cfs)
2 year 0.026004
5 year 0.387114
10 year 0.577995
25 year 0.713547
DRAFT
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Duration Flows
The Facility PASSED
Flow(cfs) Predev Mit Percentage Pass/Fail

0.0276 2186 2209 101 Pass

0.0344 1472 1025 69 Pass

0.0412 1095 948 86 Pass

0.0479 958 891 93 Pass

0.0547 882 817 92 Pass

0.0615 816 771 94 Pass

0.0683 750 723 96 Pass

0.0751 697 676 96 Pass

0.0819 661 643 97 Pass

0.0886 622 594 95 Pass

0.0954 591 549 92 Pass

0.1022 558 500 89 Pass

0.1090 518 472 91 Pass

0.1158 486 450 92 Pass

0.1226 464 422 90 Pass

0.1294 451 398 88 Pass

0.1361 426 381 89 Pass

0.1429 408 365 89 Pass

0.1497 386 353 91 Pass

0.1565 366 344 93 Pass

0.1633 339 326 96 Pass

0.1701 314 307 97 Pass

0.1768 304 291 95 Pass

0.1836 284 277 97 Pass

0.1904 269 270 100 Pass

0.1972 250 258 103 Pass

0.2040 238 250 105 Pass

0.2108 227 235 103 Pass

0.2176 218 213 97 Pass

0.2243 203 207 101 Pass

0.2311 199 203 102 Pass

0.2379 190 190 100 Pass

0.2447 183 183 100 Pass

0.2515 177 172 97 Pass

0.2583 171 162 94 Pass

0.2651 161 150 93 Pass

0.2718 154 149 96 Pass

0.2786 145 144 99 Pass

0.2854 141 132 93 Pass

0.2922 136 127 93 Pass

0.2990 130 117 90 Pass

0.3058 125 113 90 Pass

0.3125 115 106 92 Pass

0.3193 112 104 92 Pass

0.3261 106 96 90 Pass

0.3329 100 93 93 Pass

0.3397 97 90 92 Pass

0.3465 91 86 94 Pass

0.3533 89 81 91 Pass

0.3600 86 80 93 Pass

0.3668 82 77 93 Pass

0.3736 82 76 92 Pass

0.3804 75 71 94 Pass
DRAFT
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0.3872 72 68 94 Pass

0.3940 71 67 94 Pass

0.4007 67 65 97 Pass

0.4075 63 61 96 Pass

0.4143 59 56 94 Pass

0.4211 59 56 94 Pass

0.4279 57 55 96 Pass

0.4347 54 54 100 Pass

0.4415 51 52 101 Pass

0.4482 50 50 100 Pass

0.4550 46 50 108 Pass

0.4618 45 48 106 Pass

0.4686 44 48 109 Pass

0.4754 42 46 109 Pass

0.4822 41 45 109 Pass

0.4889 39 42 107 Pass

0.4957 39 41 105 Pass

0.5025 37 41 110 Pass

0.5093 36 39 108 Pass

0.5161 35 37 105 Pass

0.5229 33 35 106 Pass

0.5297 32 34 106 Pass

0.5364 30 31 103 Pass

0.5432 30 30 100 Pass

0.5500 29 30 103 Pass

0.5568 29 28 96 Pass

0.5636 27 28 103 Pass

0.5704 26 26 100 Pass

0.5771 26 25 96 Pass

0.5839 24 24 100 Pass

0.5907 23 23 100 Pass

0.5975 21 21 100 Pass

0.6043 20 19 95 Pass

0.6111 19 19 100 Pass

0.6179 18 18 100 Pass

0.6246 18 18 100 Pass

0.6314 17 16 94 Pass

0.6382 17 14 82 Pass

0.6450 15 12 80 Pass

0.6518 15 12 80 Pass

0.6586 14 10 71 Pass

0.6654 12 10 83 Pass

0.6721 11 10 90 Pass

0.6789 11 10 90 Pass

0.6857 119 81 Pass

0.6925 118 72 Pass

0.6993 118 72 Pass
DRAFT
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Water Quality
DRAFT
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POC 2
+ Predeveloped x Mitigated
Predeveloped Landuse Totals for POC #2
Total Pervious Area: 3.22
Total Impervious Area: 0
Mitigated Landuse Totals for POC #2
Total Pervious Area: 0.26
Total Impervious Area: 2.98
Flow Frequency Method: Cunnane
Flow Frequency Return Periods for Predeveloped. POC #2
Return Period Flow(cfs)
2 year 0.716302
5 year 1.412243
10 year 1.815856
25 year 2.59812
Flow Frequency Return Periods for Mitigated. POC #2
Return Period Flow(cfs)
2 year 0.06515
5 year 0.587757
10 year 1.498829
25 year 1.86682
DRAFT
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Duration Flows
The Facility PASSED
Flow(cfs) Predev Mit Percentage Pass/Fail

0.0716 2146 1994 92 Pass

0.0892 1457 1174 80 Pass

0.1069 1103 996 90 Pass

0.1245 951 844 88 Pass

0.1421 874 790 90 Pass

0.1597 814 743 91 Pass

0.1773 748 711 95 Pass

0.1950 703 674 95 Pass

0.2126 657 649 98 Pass

0.2302 618 604 97 Pass

0.2478 589 572 97 Pass

0.2654 558 544 97 Pass

0.2831 519 515 99 Pass

0.3007 484 484 100 Pass

0.3183 462 457 98 Pass

0.3359 451 429 95 Pass

0.3535 427 408 95 Pass

0.3711 403 386 95 Pass

0.3888 386 366 94 Pass

0.4064 364 352 96 Pass

0.4240 341 334 97 Pass

0.4416 315 317 100 Pass

0.4592 301 299 99 Pass

0.4769 284 283 99 Pass

0.4945 269 271 100 Pass

0.5121 250 259 103 Pass

0.5297 236 250 105 Pass

0.5473 227 236 103 Pass

0.5649 218 220 100 Pass

0.5826 203 212 104 Pass

0.6002 199 199 100 Pass

0.6178 190 184 96 Pass

0.6354 183 179 97 Pass

0.6530 177 164 92 Pass

0.6707 171 154 90 Pass

0.6883 161 151 93 Pass

0.7059 154 144 93 Pass

0.7235 145 136 93 Pass

0.7411 141 129 91 Pass

0.7587 136 125 91 Pass

0.7764 128 121 94 Pass

0.7940 125 113 90 Pass

0.8116 115 109 94 Pass

0.8292 112 108 96 Pass

0.8468 106 101 95 Pass

0.8645 100 99 99 Pass

0.8821 97 94 96 Pass

0.8997 91 88 96 Pass

0.9173 89 83 93 Pass

0.9349 86 79 91 Pass

0.9526 82 74 90 Pass

0.9702 81 69 85 Pass

0.9878 75 67 89 Pass
DRAFT
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1.0054 72 63 87 Pass

1.0230 70 62 88 Pass

1.0406 67 59 88 Pass

1.0583 63 58 92 Pass

1.0759 59 56 94 Pass

1.0935 59 55 93 Pass

1.1111 56 53 94 Pass

1.1287 54 51 94 Pass

1.1464 51 46 90 Pass

1.1640 50 44 88 Pass

1.1816 46 43 93 Pass

1.1992 45 42 93 Pass

1.2168 44 41 93 Pass

1.2344 42 40 95 Pass

1.2521 41 40 97 Pass

1.2697 39 40 102 Pass

1.2873 39 39 100 Pass

1.3049 37 38 102 Pass

1.3225 36 38 105 Pass

1.3402 35 36 102 Pass

1.3578 33 34 103 Pass

1.3754 32 33 103 Pass

1.3930 30 32 106 Pass

1.4106 30 32 106 Pass

1.4283 29 31 106 Pass

1.4459 28 31 110 Pass

1.4635 27 26 96 Pass

1.4811 26 24 92 Pass

1.4987 26 23 88 Pass

1.5163 24 20 83 Pass

1.5340 23 19 82 Pass

1.5516 21 19 90 Pass

1.5692 20 19 95 Pass

1.5868 19 18 94 Pass

1.6044 18 18 100 Pass

1.6221 17 18 105 Pass

1.6397 17 18 105 Pass

1.6573 16 15 93 Pass

1.6749 15 14 93 Pass

1.6925 15 14 93 Pass

1.7101 14 14 100 Pass

1.7278 12 11 91 Pass

1.7454 11 10 90 Pass

1.7630 119 81 Pass

1.7806 119 81 Pass

1.7982 119 81 Pass

1.8159 118 72 Pass
DRAFT
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Water Quality
DRAFT
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Rational Method
Data for Rational Method is not available.

DRAFT
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Model Default Modifications
Total of 0 changes have been made.

PERLND Changes
No PERLND changes have been made.

IMPLND Changes
No IMPLND changes have been made.

DRAFT
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Appendix
Predeveloped Schematic
DRAFT
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Mitigated Schematic
DRAFT
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Predeveloped UCI File
RUN
GLOBAL
WWHM4 model simulation
START 1974 10 01 END 2011 09 30
RUN INTERP OUTPUT LEVEL 3 0
RESUME 0 RUN 1 UNIT SYSTEM 1

END GLOBAL
FILES
<File> <Un#> <-----------File Name------------------------------>*** <-ID-> ***
WDM 26 default[0].wdm
MESSU 25 Predefault[0].MES
27 Predefault[0].L61
28 Predefault[0].L62
30 POCdefault[0]1.dat
31 POCdefault[0]2.dat

END FILES

OPN SEQUENCE
INGRP INDELT 00:15
PERLND 41
COPY 501
COPY 502
DISPLY 1
DISPLY 2

END INGRP

END OPN SEQUENCE
DISPLY
DISPLY-INFO1
# - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 DMA 1 MAX 1 2 30 9
2 DMA 2 MAX 1 2 31 9
END DISPLY-INFO1

END DISPLY
COPY

TIMESERIES
# - # NPT NMN ***
1 1 1
501 1 1
502 1 1

END TIMESERIES

END COPY
GENER
OPCODE
# # OPCD ***

END OPCODE
PARM
# # K ***

END PARM

END GENER
PERLND

GEN-INFO
<PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr ***
in out ***
41 C/D,Grass,Flat(0-5%) 1 1 1 1 27 0

END GEN-INFO
*** Section PWATER***

ACTIVITY
<PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 41 0 0 1 0 0 0 0 0 0 0 0 0

END ACTIVITY

PRINT-INFO
DRAFT
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<PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 41 0 0 4 0 0 0 0 0 0 0 0 0 1 9

END PRINT-INFO
PWAT-PARM1
<PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 41 0 0 0 1 0 0 0 0 1 0 0
END PWAT-PARM1
PWAT-PARM2
<PLS > PWATER input info: Part 2 ***
# - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC
41 0 4.8 0.045 400 0.05 2 0.95
END PWAT-PARM2
PWAT-PARM3
<PLS > PWATER input info: Part 3 ***
# - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 41 40 35 3 2 0.15 0.15 0
END PWAT-PARM3
PWAT-PARM4
<PLS > PWATER input info: Part 4 ***
# - # CEPSC UZSN NSUR INTFW IRC LZETP ***
41 0 0.8 0.25 2 0.7 0
END PWAT-PARM4

MON-LZETPARM
<PLS > PWATER input info: Part 3 ***
# - # JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC *** 41 0.4 0.4 0.4 0.45 0.5 0.55 0.55 0.55 0.55 0.55 0.45 0.4

END MON-LZETPARM

MON-INTERCEP
<PLS > PWATER input info: Part 3 ***
# - # JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC *** 41 0.12 0.12 0.12 0.11 0.1 0.1 0.1 0.1 0.1 0.1 0.11 0.12

END MON-INTERCEP
PWAT-STATE1
<PLS > *** Initial conditions at start of simulation
ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 ***
# - # *** CEPS SURS UZS IFWS LZS AGWS GWVS
41 0 0 0.01 0 0.5 0.3 0.01
END PWAT-STATE1

END PERLND
IMPLND

GEN-INFO
<PLS ><-------Name-------> Unit-systems Printer ***
# - # User t-series Engl Metr ***
in out ***

END GEN-INFO
*** Section IWATER***

ACTIVITY
<PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL ***

END ACTIVITY

PRINT-INFO
<ILS > ******** Print-flags ******** PIVL PYR
# - # ATMP SNOW IWAT SLD IWG IQAL *********

END PRINT-INFO
IWAT-PARM1
<PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI ***
END IWAT-PARM1
DRAFT
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IWAT-PARM2
<PLS > IWATER input info: Part 2 ***
# - # *** LSUR SLSUR NSUR RETSC
END IWAT-PARM2
IWAT-PARM3
<PLS > IWATER input info: Part 3 ***
# - # ***PETMAX PETMIN
END IWAT-PARM3
IWAT-STATE1
<PLS > *** Initial conditions at start of simulation
# - # *** RETS SURS
END IWAT-STATE1

END IMPLND

SCHEMATIC
<-Source-> <--Area--> <-Target-> MBLK ***
<Name> # <-factor-> <Name> # Tbl# ***
DMA 1***
PERLND 41 1.24 COPY 501 12
PERLND 41 1.24 COPY 501 13
DMA 2***
PERLND 41 3.22 COPY 502 12
PERLND 41 3.22 COPY 502 13
******Routing******

END SCHEMATIC

NETWORK
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1
COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # ***

END NETWORK
RCHRES

GEN-INFO
RCHRES Name Nexits Unit Systems Printer ***
# - #<------------------><---> User T-series Engl Metr LKFG *** in out ***

END GEN-INFO
*** Section RCHRES***

ACTIVITY
<PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG ***

END ACTIVITY

PRINT-INFO
<PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR *********

END PRINT-INFO
HYDR-PARM1
RCHRES Flags for each HYDR Section ***
# - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * ***
END HYDR-PARM1
HYDR-PARM2
# - # FTABNO LEN DELTH STCOR KS DB50 ***
<------><--------><--------><--------><--------><--------><--------> *** DRAFT
default[0] 7/18/2024 11:10:41 AM Page 29
END HYDR-PARM2

HYDR-INIT
RCHRES Initial conditions for each HYDR section ***
# - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><--->

END HYDR-INIT

END RCHRES

SPEC-ACTIONS

END SPEC-ACTIONS

FTABLES

END FTABLES

EXT SOURCES
<-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC
WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC
WDM 1 EVAP ENGL 1 PERLND 1 999 EXTNL PETINP
WDM 1 EVAP ENGL 1 IMPLND 1 999 EXTNL PETINP

END EXT SOURCES

EXT TARGETS
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL
COPY 502 OUTPUT MEAN 1 1 48.4 WDM 502 FLOW ENGL REPL

END EXT TARGETS

MASS-LINK
<Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #***
MASS-LINK 12
PERLND PWATER SURO 0.083333 COPY INPUT MEAN
END MASS-LINK 12
MASS-LINK 13
PERLND PWATER IFWO 0.083333 COPY INPUT MEAN
END MASS-LINK 13

END MASS-LINK

END RUN
DRAFT
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Mitigated UCI File
RUN
GLOBAL
WWHM4 model simulation
START 1974 10 01 END 2011 09 30
RUN INTERP OUTPUT LEVEL 3 0
RESUME 0 RUN 1 UNIT SYSTEM 1

END GLOBAL
FILES
<File> <Un#> <-----------File Name------------------------------>*** <-ID-> ***
WDM 26 default[0].wdm
MESSU 25 Mitdefault[0].MES
27 Mitdefault[0].L61
28 Mitdefault[0].L62
30 POCdefault[0]1.dat
31 POCdefault[0]2.dat

END FILES

OPN SEQUENCE
INGRP INDELT 00:15
PERLND 41
IMPLND 1
RCHRES 1
RCHRES 2
COPY 1
COPY 501
COPY 2
COPY 502
DISPLY 1
DISPLY 2

END INGRP

END OPN SEQUENCE
DISPLY
DISPLY-INFO1
# - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Tank 1 MAX 1 2 30 9
2 Tank 2 MAX 1 2 31 9
END DISPLY-INFO1

END DISPLY
COPY

TIMESERIES
# - # NPT NMN ***
1 1 1
501 1 1
2 1 1
502 1 1

END TIMESERIES

END COPY
GENER
OPCODE
# # OPCD ***

END OPCODE
PARM
# # K ***

END PARM

END GENER
PERLND

GEN-INFO
<PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr ***
in out ***
41 C/D,Grass,Flat(0-5%) 1 1 1 1 27 0

END GEN-INFO
*** Section PWATER***

ACTIVITY
DRAFT
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<PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 41 0 0 1 0 0 0 0 0 0 0 0 0

END ACTIVITY

PRINT-INFO
<PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 41 0 0 4 0 0 0 0 0 0 0 0 0 1 9

MON-LZETPARM
<PLS > PWATER input info: Part 3 ***
# - # JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC *** 41 0.4 0.4 0.4 0.45 0.5 0.55 0.55 0.55 0.55 0.55 0.45 0.4

END MON-LZETPARM

MON-INTERCEP
<PLS > PWATER input info: Part 3 ***
# - # JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC *** 41 0.12 0.12 0.12 0.11 0.1 0.1 0.1 0.1 0.1 0.1 0.11 0.12

END PERLND
IMPLND

GEN-INFO
<PLS ><-------Name-------> Unit-systems Printer ***
# - # User t-series Engl Metr ***
in out ***
1 Roads,Flat(0-5%) 1 1 1 27 0

END GEN-INFO
*** Section IWATER***

ACTIVITY
<PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL ***
1 0 0 1 0 0 0

END ACTIVITY

PRINT-INFO
<ILS > ******** Print-flags ******** PIVL PYR
DRAFT
default[0] 7/18/2024 11:10:42 AM Page 32
# - # ATMP SNOW IWAT SLD IWG IQAL *********
1 0 0 4 0 0 0 1 9

END PRINT-INFO
IWAT-PARM1
<PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI ***
1 0 0 0 0 0
END IWAT-PARM1
IWAT-PARM2
<PLS > IWATER input info: Part 2 ***
# - # *** LSUR SLSUR NSUR RETSC
1 100 0.05 0.1 0.1
END IWAT-PARM2
IWAT-PARM3
<PLS > IWATER input info: Part 3 ***
# - # ***PETMAX PETMIN
1 0 0
END IWAT-PARM3
IWAT-STATE1
<PLS > *** Initial conditions at start of simulation
# - # *** RETS SURS
1 0 0
END IWAT-STATE1

END IMPLND

SCHEMATIC
<-Source-> <--Area--> <-Target-> MBLK ***
<Name> # <-factor-> <Name> # Tbl# ***
DMA 1***
PERLND 41 0.26 RCHRES 1 2
PERLND 41 0.26 RCHRES 1 3
IMPLND 1 0.98 RCHRES 1 5
DMA 2***
PERLND 41 0.26 RCHRES 2 2
PERLND 41 0.26 RCHRES 2 3
IMPLND 1 2.98 RCHRES 2 5
******Routing******
PERLND 41 0.26 COPY 2 12
IMPLND 1 2.98 COPY 2 15
PERLND 41 0.26 COPY 2 13
RCHRES 1 1 COPY 501 17
RCHRES 1 1 COPY 601 17
RCHRES 2 1 COPY 502 17

END SCHEMATIC

END NETWORK
RCHRES

GEN-INFO
RCHRES Name Nexits Unit Systems Printer ***
# - #<------------------><---> User T-series Engl Metr LKFG *** in out ***
1 Tank 1 2 1 1 1 28 0 1
2 Tank 2 2 1 1 1 28 0 1
DRAFT
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END GEN-INFO
*** Section RCHRES***

ACTIVITY
<PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0
2 1 0 0 0 0 0 0 0 0 0

END ACTIVITY

PRINT-INFO
<PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9
2 4 0 0 0 0 0 0 0 0 0 1 9

END PRINT-INFO
HYDR-PARM1
RCHRES Flags for each HYDR Section ***
# - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * ***
1 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2
2 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2
END HYDR-PARM1
HYDR-PARM2
# - # FTABNO LEN DELTH STCOR KS DB50 ***
<------><--------><--------><--------><--------><--------><--------> *** 1 1 0.34 0.0 0.0 0.5 0.0
2 2 0.63 0.0 0.0 0.5 0.0
END HYDR-PARM2

END HYDR-INIT

END RCHRES

SPEC-ACTIONS

END SPEC-ACTIONS

FTABLES
FTABLE 1
91 5
Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)***

0.000000 0.000000 0.000000 0.000000 0.000000

0.044444 0.034506 0.001025 0.003934 0.000348

0.088889 0.048525 0.002889 0.005563 0.000489

0.133333 0.059092 0.005289 0.006813 0.000596

0.177778 0.067840 0.008115 0.007867 0.000684

0.222222 0.075405 0.011301 0.008796 0.000760

0.266667 0.082115 0.014805 0.009635 0.000828

0.311111 0.088164 0.018591 0.010407 0.000889

0.355556 0.093682 0.022634 0.011126 0.000945

0.400000 0.098757 0.026912 0.011801 0.000996

0.444444 0.103455 0.031406 0.012439 0.001043

0.488889 0.107824 0.036103 0.013046 0.001087

0.533333 0.111903 0.040986 0.013627 0.001128

0.577778 0.115724 0.046046 0.014183 0.001167

0.622222 0.119310 0.051270 0.014718 0.001203

0.666667 0.122682 0.056648 0.015235 0.001237

0.711111 0.125858 0.062172 0.015735 0.001269

0.755556 0.128852 0.067833 0.016219 0.001299

0.800000 0.131676 0.073623 0.016689 0.001328

0.844444 0.134342 0.079535 0.017146 0.001355

0.888889 0.136858 0.085562 0.017592 0.001380
DRAFT
default[0] 7/18/2024 11:10:42 AM Page 34

0.933333 0.139232 0.091698 0.018026 0.001404

0.977778 0.141472 0.097936 0.018450 0.001427

1.022222 0.143584 0.104271 0.018865 0.001448

1.066667 0.145574 0.110697 0.019271 0.001468

1.111111 0.147446 0.117209 0.019668 0.001487

1.155556 0.149204 0.123802 0.020058 0.001504

1.200000 0.150854 0.130470 0.020440 0.001521

1.244444 0.152398 0.137210 0.020815 0.001537

1.288889 0.153840 0.144015 0.021183 0.001551

1.333333 0.155182 0.150883 0.021546 0.001565

1.377778 0.156427 0.157808 0.021902 0.001577

1.422222 0.157577 0.164786 0.022252 0.001589

1.466667 0.158635 0.171813 0.022597 0.001600

1.511111 0.159602 0.178886 0.022937 0.001609

1.555556 0.160480 0.185999 0.023272 0.001618

1.600000 0.161270 0.193149 0.023602 0.001626

1.644444 0.161973 0.200333 0.023928 0.001633

1.688889 0.162592 0.207546 0.024249 0.001639

1.733333 0.163126 0.214784 0.024566 0.001645

1.777778 0.163576 0.222044 0.024879 0.001649

1.822222 0.163944 0.229323 0.025188 0.001653

1.866667 0.164229 0.236616 0.025493 0.001656

1.911111 0.164433 0.243920 0.025795 0.001658

1.955556 0.164555 0.251231 0.026093 0.001659

2.000000 0.164595 0.258546 0.026388 0.001659

2.044444 0.164555 0.265860 0.026679 0.001659

2.088889 0.164433 0.273172 0.026968 0.001659

2.133333 0.164229 0.280475 0.027253 0.001659

2.177778 0.163944 0.287769 0.027536 0.001659

2.222222 0.163576 0.295047 0.027815 0.001659

2.266667 0.163126 0.302307 0.104376 0.001659

2.311111 0.162592 0.309546 0.290379 0.001659

2.355556 0.161973 0.316759 0.539507 0.001659

2.400000 0.161270 0.323942 0.838502 0.001659

2.444444 0.160480 0.331093 1.180104 0.001659

2.488889 0.159602 0.338206 1.559532 0.001659

2.533333 0.158635 0.345278 1.973332 0.001659

2.577778 0.157577 0.352305 2.418852 0.001659

2.622222 0.156427 0.359284 2.893975 0.001659

2.666667 0.155182 0.366209 3.396959 0.001659

2.711111 0.153840 0.373076 3.926337 0.001659

2.755556 0.152398 0.379882 4.480852 0.001659

2.800000 0.150854 0.386621 5.059413 0.001659

2.844444 0.149204 0.393289 5.661057 0.001659

2.888889 0.147446 0.399882 6.284931 0.001659

2.933333 0.145574 0.406394 6.930268 0.001659

2.977778 0.143584 0.412820 7.596377 0.001659

3.022222 0.141472 0.419155 8.095435 0.001659

3.066667 0.139232 0.425394 8.759467 0.001659

3.111111 0.136858 0.431529 9.705715 0.001659

3.155556 0.134342 0.437557 10.86558 0.001659

3.200000 0.131676 0.443469 12.20457 0.001659

3.244444 0.128852 0.449259 13.70050 0.001659

3.288889 0.125858 0.454920 15.33718 0.001659

3.333333 0.122682 0.460444 17.10175 0.001659

3.377778 0.119310 0.465822 18.98337 0.001659

3.422222 0.115724 0.471046 20.97248 0.001659

3.466667 0.111903 0.476105 23.06026 0.001659

3.511111 0.107824 0.480989 25.23837 0.001659

3.555556 0.103455 0.485685 27.49877 0.001659

3.600000 0.098757 0.490180 29.83353 0.001659

3.644444 0.093682 0.494458 32.23479 0.001659

3.688889 0.088164 0.498501 34.69463 0.001659

3.733333 0.082115 0.502287 37.20512 0.001659

3.777778 0.075405 0.505790 39.75822 0.001659

3.822222 0.067840 0.508977 42.34580 0.001659

3.866667 0.059092 0.511803 44.95968 0.001659

3.911111 0.048525 0.514203 47.59157 0.001659

3.955556 0.034506 0.516067 50.23314 0.001659

4.000000 0.001000 0.517091 52.87605 0.001659
DRAFT
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END FTABLE 1
FTABLE 2
91 5
Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)***

0.000000 0.000000 0.000000 0.000000 0.000000

0.055556 0.079414 0.002948 0.009583 0.000801

0.111111 0.111675 0.008310 0.013552 0.001126

0.166667 0.135995 0.015214 0.016598 0.001371

0.222222 0.156128 0.023344 0.019165 0.001574

0.277778 0.173538 0.032512 0.021427 0.001750

0.333333 0.188980 0.042590 0.023473 0.001906

0.388889 0.202903 0.053481 0.025353 0.002046

0.444444 0.215602 0.065112 0.027104 0.002174

0.500000 0.227282 0.077418 0.028748 0.002292

0.555556 0.238093 0.090349 0.030303 0.002401

0.611111 0.248148 0.103859 0.031782 0.002502

0.666667 0.257537 0.117909 0.033195 0.002597

0.722222 0.266329 0.132463 0.034551 0.002685

0.777778 0.274582 0.147491 0.035855 0.002769

0.833333 0.282343 0.162963 0.037113 0.002847

0.888889 0.289652 0.178854 0.038331 0.002921

0.944444 0.296543 0.195139 0.039510 0.002990

1.000000 0.303043 0.211796 0.040656 0.003056

1.055556 0.309177 0.228804 0.041770 0.003118

1.111111 0.314967 0.246143 0.042855 0.003176

1.166667 0.320432 0.263794 0.043913 0.003231

1.222222 0.325587 0.281741 0.044947 0.003283

1.277778 0.330448 0.299965 0.045957 0.003332

1.333333 0.335026 0.318452 0.046945 0.003378

1.388889 0.339334 0.337185 0.047913 0.003422

1.444444 0.343382 0.356151 0.048862 0.003462

1.500000 0.347179 0.375334 0.049793 0.003501

1.555556 0.350733 0.394722 0.050707 0.003537

1.611111 0.354050 0.414300 0.051604 0.003570

1.666667 0.357139 0.434056 0.052486 0.003601

1.722222 0.360005 0.453978 0.053354 0.003630

1.777778 0.362652 0.474053 0.054208 0.003657

1.833333 0.365086 0.494269 0.055048 0.003681

1.888889 0.367312 0.514614 0.055876 0.003704

1.944444 0.369332 0.535077 0.056692 0.003724

2.000000 0.371150 0.555647 0.057496 0.003742

2.055556 0.372769 0.576313 0.058289 0.003759

2.111111 0.374192 0.597062 0.059071 0.003773

2.166667 0.375421 0.617886 0.059844 0.003785

2.222222 0.376458 0.638772 0.060606 0.003796

2.277778 0.377304 0.659711 0.061359 0.003804

2.333333 0.377961 0.680691 0.062103 0.003811

2.388889 0.378429 0.701703 0.062838 0.003816

2.444444 0.378710 0.722736 0.063564 0.003819

2.500000 0.378803 0.743779 0.064282 0.003820

2.555556 0.378710 0.764821 0.064993 0.003819

2.611111 0.378429 0.785854 0.065695 0.003819

2.666667 0.377961 0.806866 0.066390 0.003819

2.722222 0.377304 0.827846 0.067079 0.003819

2.777778 0.376458 0.848785 0.067760 0.003819

2.833333 0.375421 0.869671 0.068434 0.003819

2.888889 0.374192 0.890495 0.069101 0.003819

2.944444 0.372769 0.911244 0.069763 0.003819

3.000000 0.371150 0.931910 0.070418 0.003819

3.055556 0.369332 0.952480 0.071067 0.003819

3.111111 0.367312 0.972943 0.071710 0.003819

3.166667 0.365086 0.993288 0.072347 0.003819

3.222222 0.362652 1.013504 0.118366 0.003819

3.277778 0.360005 1.033579 0.370791 0.003819

3.333333 0.357139 1.053501 0.741268 0.003819

3.388889 0.354050 1.073257 1.199587 0.003819

3.444444 0.350733 1.092835 1.731279 0.003819

3.500000 0.347179 1.112223 2.327323 0.003819

3.555556 0.343382 1.131406 2.981389 0.003819
DRAFT
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3.611111 0.339334 1.150372 3.688720 0.003819

3.666667 0.335026 1.169105 4.445566 0.003819

3.722222 0.330448 1.187592 5.248875 0.003819

3.777778 0.325587 1.205817 6.096097 0.003819

3.833333 0.320432 1.223763 6.985062 0.003819

3.888889 0.314967 1.241414 7.913894 0.003819

3.944444 0.309177 1.258753 8.880949 0.003819

4.000000 0.303043 1.275761 9.884769 0.003819

4.055556 0.296543 1.292418 10.51079 0.003819

4.111111 0.289652 1.308703 11.65399 0.003819

4.166667 0.282343 1.324594 13.13308 0.003819

4.222222 0.274582 1.340066 14.88283 0.003819

4.277778 0.266329 1.355094 16.86462 0.003819

4.333333 0.257537 1.369648 19.05106 0.003819

4.388889 0.248148 1.383698 21.42051 0.003819

4.444444 0.238093 1.397208 23.95440 0.003819

4.500000 0.227282 1.410139 26.63591 0.003819

4.555556 0.215602 1.422445 29.44911 0.003819

4.611111 0.202903 1.434076 32.37852 0.003819

4.666667 0.188980 1.444968 35.40873 0.003819

4.722222 0.173538 1.455045 38.52429 0.003819

4.777778 0.156128 1.464213 41.70957 0.003819

4.833333 0.135995 1.472343 44.94873 0.003819

4.888889 0.111675 1.479247 48.22574 0.003819

4.944444 0.079414 1.484609 51.52439 0.003819

5.000000 0.001000 1.487557 54.82840 0.003819
END FTABLE 2

END FTABLES

END EXT SOURCES

EXT TARGETS
<-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** RCHRES 1 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL
RCHRES 1 HYDR O 1 1 1 WDM 1001 FLOW ENGL REPL
RCHRES 1 HYDR O 2 1 1 WDM 1002 FLOW ENGL REPL
RCHRES 1 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL
COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL
COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL
RCHRES 2 HYDR RO 1 1 1 WDM 1008 FLOW ENGL REPL
RCHRES 2 HYDR O 1 1 1 WDM 1009 FLOW ENGL REPL
RCHRES 2 HYDR O 2 1 1 WDM 1010 FLOW ENGL REPL
RCHRES 2 HYDR STAGE 1 1 1 WDM 1011 STAG ENGL REPL
COPY 2 OUTPUT MEAN 1 1 48.4 WDM 702 FLOW ENGL REPL
COPY 502 OUTPUT MEAN 1 1 48.4 WDM 802 FLOW ENGL REPL

END EXT TARGETS

MASS-LINK
<Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #***
MASS-LINK 2
PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 2
MASS-LINK 3
PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 3
MASS-LINK 5
IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL
END MASS-LINK 5
DRAFT
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MASS-LINK 12
PERLND PWATER SURO 0.083333 COPY INPUT MEAN
END MASS-LINK 12
MASS-LINK 13
PERLND PWATER IFWO 0.083333 COPY INPUT MEAN
END MASS-LINK 13
MASS-LINK 15
IMPLND IWATER SURO 0.083333 COPY INPUT MEAN
END MASS-LINK 15
MASS-LINK 17
RCHRES OFLOW OVOL 1 COPY INPUT MEAN
END MASS-LINK 17

END MASS-LINK

END RUN
DRAFT
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Predeveloped HSPF Message File
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Mitigated HSPF Message File
DRAFT
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Disclaimer
Legal Notice
This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2024; All Rights Reserved.

Clear Creek Solutions, Inc.
6200 Capitol Blvd. Ste F
Olympia, WA. 98501
Toll Free 1(866)943-0304
Local (360)943-0304
www.clearcreeksolutions.com
DET-1
DET-1
DET-1
DET-1
DET-2
DET-2
DET-2
DET-2
Water Quality Management Plan (WQMP)
CarMax Murrieta #1824
63 Appendix 8: Source Control
Pollutant Sources/Source Control Checklist
64 65
66 67
68 69
70 71
72 73
74 Appendix 9: O&M
Operation and Maintenance Plan and Documentation of Finance, Maintenance and Recording Mechanisms 75 76
77 78
79 80
Appendix 10: Educational
Materials
BMP Fact Sheets, Maintenance Guidelines and Other End-User BMP Information ••••••••
•••••••

1. 2.

3. 4.

1. 2.

3. 1.

2. 3.

4. 5.

6. 1.

2. 3.

StormTech
Installation Video
StormTech® Installation Guide
MC-3500 & MC-4500 Chamber
Required Materials and Equipment List
Ȏ$FFHSWDEOHࢉOOPDWHULDOVSHU7DEOH
• ADS Plus and non-woven geotextile fabrics
Note: MC-3500 chamber pallets are 77” x 90” (2.0 m x 2.3 m) and weigh about 2010 lbs. (912 kg) and MC-4500 pallets are 100” x 52” (2.5 m x 1.3 m) and weigh about 840 lbs. (381 kg). Unloading chambers requires 72” (1.8 m) (min.) forks and/or tie downs (straps, chains, etc).

Important Notes:

A. This installation guide provides the minimum requirements for proper installation of chambers. Nonadherence to this guide may result in GDPDJHWRFKDPEHUVGXULQJLQVWDOODWLRQ5HSODFHPHQWRIGDPDJHGFKDPEHUVGXULQJRUDIWHUEDFNࢉOOLQJLVFRVWO\DQGYHU\WLPHFRQVXPLQJ,W is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses.
%8VHRIDGR]HUWRSXVKHPEHGPHQWVWRQHEHWZHHQWKHURZVRIFKDPEHUVPD\FDXVHGDPDJHWRFKDPEHUVDQGLVQRWDQDFFHSWDEOHEDFNࢉOO method. Any chambers damaged by using the “dump and push” method are not covered under the StormTech standard warranty.

C. Care should be taken in the handling of chambers and end caps. End caps must be stored standing upright. Avoid dropping, prying or excessive force on chambers during removal from pallet and initial placement.

Requirements for System Installation
• StormTech solid end caps, pre-cored and pre-fabricated end caps Ȏ6WRUP7HFKFKDPEHUVPDQLIROGVDQGࢉWWLQJV
Excavate bed and prepare subgrade per
HQJLQHHUȆVSODQV3ODQVDQGVSHFLࢉFDWLRQVVKRXOG
include Best Management Practices (BMPs)
to deter contamination of open pits during
construction.

Place non-woven geotextile over prepared soils
and up excavation walls.

Place clean, crushed, angular stone foundation
9” (230 mm) min. Install underdrains if required.
&RPSDFWWRDFKLHYHDࢊDWVXUIDFH
1 2
Manifold, Scour Fabric and Chamber Assembly
Manifold Insertion StormTech Isolator Row Plus Detail
Install manifolds and lay out ADS
PLUS fabric at inlet rows [min.
IW
P
@DWHDFKLQOHWHQG
cap. Place a continuous piece (no
seams) along entire length of
Isolator® PLUS Row(s).
,QVHUWLQOHWDQGRXWOHWPDQLIROGVDPLQLPXPȊ
(300 mm) into chamber end caps. Manifold
KHDGHUVKRXOGEHDPLQLPXPȊ
PP
IURP
base of end cap.
$OLJQWKHࢉUVWFKDPEHUDQG
end cap of each row with inlet
pipes. Contractor may choose
to postpone stone placement
around end chambers and
leave ends of rows open for
easy inspection of chambers
GXULQJWKHEDFNࢉOOSURFHVV
Place a continuous layer of ADS PLUS
fabric between the foundation stone and
the Isolator Row PLUS chambers, making
VXUHWKHIDEULFOD\VࢊDWDQGH[WHQGVWKH
entire width of the chamber feet.

When used on an Isolator Row PLUS, a 24”
)/$03
ࢊDUHGHQGUDPS
LVDWWDFKHGWR
the inside of the inlet pipe with a provided
threaded rod and bolt. The FLAMP then
lays on top of the ADS PLUS fabric.

Continue installing chambers by
overlapping chamber end corrugations.

Chamber joints are labeled “Lower Joint
– Overlap Here” and “Build this direction
– Upper Joint” Be sure that the chamber
placement does not exceed the reach of
the construction equipment used to place
WKHVWRQH0DLQWDLQPLQLPXPȊ
PP

VSDFLQJEHWZHHQ0&URZVDQG
Ȋ

PP
VSDFLQJEHWZHHQ0&URZV

SUMP DEPTH TBD BY

SITE DESIGN ENGINEER
(24" [600 mm] MIN RECOMMENDED)

CATCH BASIN

OR MANHOLE

OPTIONAL INSPECTION PORT
END CAP (MC-4500 SHOWN)
24" (600 mm) HDPE ACCESS PIPE REQUIRED

STORMTECH HIGHLY RECOMMENDS

FLEXSTORM INSERTS IN ANY UPSTREAM

STRUCTURES WITH OPEN GRATES

COVER PIPE CONNECTION TO END CAP WITH ADS
GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE
ONE LAYER OF ADSPLUS175 WOVEN GEOTEXTILE BETWEEN

FOUNDATION STONE AND CHAMBERS

ELEVATED BYPASS MANIFOLD
CHAMBER (MC-4500 SHOWN)
INSTALL FLAMP ON 24" (600 mm) ACCESS PIPE
Initial Anchoring of Chambers – Embedment Stone
Initial embedment shall be spotted along the centerline of the chamber evenly anchoring the lower portion of the chamber. This is best accomplished with a stone conveyor or excavator reaching along the row.

No equipment shall be operated on the bed at this stage of the installation. ([FDYDWRUVPXVWEHORFDWHGRࢆWKHEHG'XPSWUXFNVVKDOOQRWGXPSVWRQH directly on to the bed. Dozers or loaders are not allowed on the bed at this time.

Backfill of Chambers – Embedment Stone
Uneven Backfill
%DFNࢉOOFKDPEHUVHYHQO\6WRQHFROXPQKHLJKWVKRXOGQHYHUGLࢆHUE\ PRUHWKDQȊ
PP
EHWZHHQDGMDFHQWFKDPEHUURZVRUEHWZHHQ
chamber rows and perimeter.

Even Backfill
Perimeter stone must be brought up evenly with chamber rows. 3HULPHWHUPXVWEHIXOO\EDFNࢉOOHGZLWKVWRQHH[WHQGHGKRUL]RQWDOO\WR the excavation wall.

Perimeter Not Backfilled Perimeter Fully Backfilled
3 12" (300 mm)
MAX.

Backfill of Chambers – Embedment Stone and Cover Stone
Final Backfill of Chambers – Fill Material Inserta Tee Detail &RQWLQXHHYHQO\EDFNࢉOOLQJEHWZHHQURZVDQGDURXQGSHULPHWHUXQWLO HPEHGPHQWVWRQHUHDFKHVWRSVRIFKDPEHUVDQGDPLQLPXPȊ PP

of cover stone is in place. Perimeter stone must extend horizontally to the excavation wall for both straight or sloped sidewalls. The recommended EDFNࢉOOPHWKRGVDUHZLWKDVWRQHFRQYH\RURXWVLGHRIWKHEHGRUEXLOGDV \RXJRZLWKDQH[FDYDWRULQVLGHWKHEHGUHDFKLQJDORQJWKHURZV%DFNࢉOOLQJ while assembling chambers rows as shown in the picture will help to ensure that equipment reach is not exceeded.

Install non-woven geotextile over stone. Geotextile must overlap 24” (600 PP
ZKHUHHGJHVPHHW&RPSDFWDWȊ
PP
RIࢉOO5ROOHUWUDYHO
parallel with rows.
2QO\DIWHUFKDPEHUVKDYHEHHQEDFNࢉOOHGWRWRSRIFKDPEHUDQG with a minimum 12” (300 mm) of cover stone on top of chambers can VNLGORDGHUVDQGVPDOO/*3GR]HUVEHXVHGWRࢉQDOJUDGHFRYHUVWRQH DQGEDFNࢉOOPDWHULDOLQDFFRUGDQFHZLWKJURXQGSUHVVXUHOLPLWVLQ Table 2. Equipment must push material parallel to rows only. Never push perpendicular to rows. StormTech recommends the contractor inspect FKDPEHUURZVEHIRUHSODFLQJࢉQDOEDFNࢉOO$Q\FKDPEHUVGDPDJHGE\ construction equipment shall be removed and replaced.
4 CONVEYANCE

PIPE MATERIAL

MAY VARY (PVC,
HDPE, ETC.)

INSERTA TEE

CONNECTION

PLACE ADS PLUS WOVEN

GEOTEXTILE (CENTERED ON

INSERTA-TEE INLET) OVER BEDDING

STONE FOR SCOUR PROTECTION AT

SIDE INLET CONNECTIONS,
GEOTEXTILE MUST EXTEND 6”
(150 mm) PAST CHAMBER FOOT
Material Location Description AASHTO M43
Designation1
Compaction/Density
Requirement
D Final Fill: Fill Material for layer ‘D’
starts from the top of the ‘C’ layer to the
ERWWRPRIࢊH[LEOHSDYHPHQWRUXQSDYHG
ࢉQLVKHGJUDGHDERYH1RWHWKDWWKH
pavement subbase may be part of the
‘D’ layer.
$Q\VRLOURFNPDWHULDOV
native soils or per
engineer’s plans. Check
plans for pavement
subgrade requirements.
1$ Prepare per site design engineer’s
plans. Paved installations may have
stringent material and preparation
requirements.

C Initial Fill: Fill Material for layer ‘C’
starts from the top of the embedment
stone (‘B’ layer) to 24” (600 mm) above
the top of the chamber. Note that
pavement subbase may be part of the
‘C’ layer.

Granular well-graded
VRLODJJUHJDWHPL[WXUHV
ࢉQHVRUSURFHVVHG
aggregate. Most
pavement subbase
materials can be used in
lieu of this layer.
$$6+720
$$$
or
AASHTO M43

Begin compaction after min. 24” (600
mm) of material over the chambers
is reached. Compact additional layers
LQȊ
PP
PD[OLIWVWRDPLQ

3URFWRUGHQVLW\IRUZHOOJUDGHG
PDWHULDODQG
UHODWLYHGHQVLW\IRU
processed aggregate materials.

B Embedment Stone: Fill the
surrounding chambers from the
foundation stone (‘A’ layer) to the ‘C’ layer
above.

Clean, crushed, angular
stone
AASHTO M43
3, 4
No compaction required.

A Foundation Stone: Fill below
chambers from the subgrade up to the
foot (bottom) of the chamber.

Clean, crushed, angular
stone,
AASHTO M43
3, 4
Place and compact in 9” (230 mm)
max lifts using two full coverages with
a vibratory compactor.2, 3
Table 1- Acceptable Fill Materials Figure 1- Inspection Port Detail Please Note:
The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For H[DPSOHDVSHFLࢉFDWLRQIRUVWRQHZRXOGVWDWH
ȉFOHDQFUXVKHGDQJXODUQR
$$6+720
VWRQHȊ

2. StormTech compaction requirements are met for ‘A’ location materials when placed and compacted in 9” (230 mm) (max) lifts using two full coverages with a vibratory compactor.

3. :KHUHLQࢉOWUDWLRQVXUIDFHVPD\EHFRPSULVHGE\FRPSDFWLRQIRUVWDQGDUGLQVWDOODWLRQVDQGVWDQGDUGGHVLJQORDG FRQGLWLRQVDࢊDWVXUIDFHPD\EHDFKLHYHGE\UDNLQJRUGUDJJLQJZLWKRXWFRPSDFWLRQHTXLSPHQW)RUVSHFLDOORDG designs, contact StormTech for compaction requirements.

Figure 2 - Fill Material Locations
MC-4500 - 24" (600 mm) MIN
MC-3500 - 18" (450 mm) MIN
MC-4500 - 7.0' (2.1 m) MAX
MC-3500 - 8.0' (2.4 m) MAX
12" (300 mm) MIN MC-4500 - 100" (2540 mm)
MC-3500 - 77" (1950 mm)
12" (300 mm) MIN
MC-4500 - 9" (230 mm) MIN
MC-3500 - 6" (150 mm) MIN
MC-4500 - 12" (300 mm) MIN
MC-3500 - 6" (150 mm) MIN

PERIMETER STONE

EXCAVATION WALL
(CAN BE SLOPED OR VERTICAL)

END CAP

SUBGRADE SOILS

DEPTH OF STONE TO BE DETERMINED
BY SITE DESIGN ENGINEER 9" (230 mm) MIN
ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL

AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS
D
C
B
A
*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED

INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR,
INCREASE COVER TO 30" (750 mm).

MC-4500 - 60" (1525 mm)
MC-3500 - 45" (1140 mm)

PAVEMENT LAYER (DESIGNED

BY SITE DESIGN ENGINEER)
5 NOTE:

INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION VALLEY.

STORMTECH

CHAMBER

CONCRETE COLLAR

PAVEMENT
12" (300 mm) MIN WIDTH

CONCRETE SLAB
6" (150 mm) MIN

THICKNESS
4" PVC INSPECTION PORT DETAIL
(MC SERIES CHAMBER) NTS
8" NYLOPLAST INSPECTION PORT
BODY (PART# 2708AG4IPKIT) OR

TRAFFIC RATED BOX W/SOLID

LOCKING COVER

CONCRETE COLLAR NOT REQUIRED

FOR UNPAVED APPLICATIONS
4" (100 mm)
SDR 35 PIPE
4" (100 mm) INSERTA TEE

TO BE CENTERED ON

CORRUGATION VALLEY
ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com. Advanced Drainage Systems, the ADS logo, and the green stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® and the Isolator® Row PLUS are registered trademarks of StormTech, Inc. ©2022 Advanced Drainage Systems, Inc. &6
Notes:
36” (900 mm) of stabilized cover materials
over the chambers is recommended during
the construction phase if general construction
activities, such as full dump truck travel and
dumping, are to occur over the bed.

2. During paving operations, dump truck axle loads
RQȊ
PP
RIFRYHUIRU0&Vmay
be necessary. Precautions should be taken to
avoid rutting of the road base layer, to ensure
that compaction requirements have been met,
DQGWKDWDPLQLPXPRIȊ
PP
RIFRYHU
IRU0&Vexists over the chambers. Contact
StormTech for additional guidance on allowable
axle loads during paving.

3. Ground pressure for track dozers is the vehicle
operating weight divided by total ground contact
area for both tracks. Excavators will exert higher
ground pressures based on loaded bucket weight
and boom extension.

4. 0LQLH[FDYDWRUV
OEVNJ
FDQEH
XVHGZLWKDWOHDVWȊ
PP
RIVWRQHRYHU
the chambers and are limited by the maximum
ground pressures in Table 2 based on a full
bucket at maximum boom extension.
StormTech does not require compaction of
LQLWLDOࢉOODWȊ
PP
RIFRYHU+RZHYHU
UHTXLUHPHQWVE\RWKHUVIRUȊ
PP
OLIWVPD\
QHFHVVLWDWHWKHXVHRIVPDOOFRPSDFWRUVDWȊ

PP
RIFRYHU

6. Storage of materials such as construction
materials, equipment, spoils, etc. should not
be located over the StormTech system. The use
of equipment over the StormTech system not
covered in Table 2 (ex. soil mixing equipment,
cranes, etc) is limited. Please contact StormTech
for more information.
Allowable track loads based on vehicle travel only.

Excavators shall not operate on chamber beds
XQWLOWKHWRWDOEDFNࢉOOUHDFKHVIHHW

PP

over the entire bed.

Material
Location
Fill Depth
over
Chambers
in. (mm)
Maximum Allowable
Wheel Loads
Maximum Allowable
Track Loads6
Maximum Allowable
Roller Loads
Max Axle Load
for Trucks
lbs (kN)
Max Wheel Load
for Loaders
lbs (kN)
Track
Width
in. (mm)
Max Ground
Pressure
psf (kPa)
Max Drum Weight
or Dynamic Force
lbs (kN)
D Final Fill
Material
36” (900)
Compacted

Ȋ

C Initial Fill
Material
24” (600)
Compacted

Ȋ

24” (600)
/RRVH'XPSHG
0& Ȋ

Ȋ

0& Ȋ

(static loads only)

B Embedment
Stone
Ȋ

Not Allowed Not Allowed Ȋ

660 (32)

Not Allowed
Ȋ

Not Allowed Not Allowed Not Allowed Not Allowed Not Allowed Material
Location
Placement Methods/
Restrictions
Wheel Load
Restrictions
Track Load
Restrictions Roller Load Restrictions
See Table 2 for Maximum Construction Loads
D Final Fill
Material
A variety of placement methods may
be used. All construction loads must
not exceed the maximum limits in
Table 2.
36” (900 mm) minimum
cover required for dump
trucks to dump over
chambers.

Dozers to push parallel to
rows.4
Roller travel parallel to rows
only until 36” (900 mm)
compacted cover is
reached.

C Initial Fill
Material
([FDYDWRUSRVLWLRQHGRࢆEHGUHFRPmended.

Small excavator allowed over
chambers. Small dozer allowed.

Asphalt can be dumped
into paver when
compacted pavement
subbase reaches 24”
(600 mm) above top of
chambers.

Small LGP track dozers &
skid loaders allowed to
grade cover stone with at
OHDVWȊ
PP
VWRQH
under tracks at all times.

Equipment must push parallel to rows at all times.

Use dynamic force of roller
RQO\DIWHUFRPSDFWHGࢉOO
depth reaches 24” (600 mm)
over chambers. Roller travel
parallel to chamber rows
only.

B Embedment
Stone
No equipment allowed on bare
chambers. Use excavator or stone
FRQYH\RUSRVLWLRQHGRࢆEHGRU
RQIRXQGDWLRQVWRQHWRHYHQO\ࢉOO
around all chambers to at least the
top of chambers.

No wheel loads allowed.

Material must be placed
outside the limits of the
chamber bed.

No tracked equipment is
allowed on chambers until
DPLQȊ
PP
FRYHU
stone is in place.

No rollers allowed.

A Foundation
Stone
No StormTech restrictions. Contractor responsible for any conditions or requirements by others relative to subgrade bearing capacity, dewatering or protection of subgrade.

Table 2 - Maximum Allowable Construction Vehicle Loads6 Table 3 - Placement Methods and Descriptions
6 Call StormTech at 888.892.2694 for technical and
product information or visit www.stormtech.com
StormTech®
Chamber Systems for Stormwater Management
MC-3500 & MC-7200
Design Manual

1 1.0 Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.0 Foundation for Chambers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.0 Required Materials/Row Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.0 Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.0 Cumulative Storage Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.0 System Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.0 Structural Cross Sections and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8.0 General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

9.0 Inspection and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 *For SC-160LP, SC-310, SC-740 & DC-780 designs, please refer to the SC-160LP/SC-310/SC-740/DC-780 Design Manual.

StormTech Engineering Services assists design professionals in specifying StormTech stormwater systems.

This assistance includes the layout of chambers to meet the engineer’s volume requirements and the connections to and from the chambers. They can also assist converting and cost engineering projects currently specified with ponds, pipe, concrete vaults and other manufactured stormwater detention/ retention products. Please note that it is the responsibility of the site design engineer to ensure that the chamber bed layout meets all design requirements and is in compliance with applicable laws and regulations governing a project.

This manual is exclusively intended to assist engineers in the design of subsurface stormwater systems using StormTech chambers.

Table of Contents
SHEET
OFDATE:

PROJECT #:

DRAWN:CHECKED:

THIS DRAWING HAS BEEN PREPARED BASED ON INFORMATION PROVIDED TO ADS UNDER THE DIRECTION OF THE SITE DESIGN ENGINEER OR OTHER PROJECT REPRESENTATIVE. THE SITE DESIGN ENGINEER SHALL REVIEW THIS DRAWING PRIOR TO CONSTRUCTION. IT IS THE ULTIMATE RESPONSIBILITY OF THE SITE DESIGN ENGINEER TO ENSURE THAT THE PRODUCT(S) DEPICTED AND ALL ASSOCIATED DETAILS MEET ALL APPLICABLE LAWS, REGULATIONS, AND PROJECT REQUIREMENTS. 4640 TRUEMAN BLVD
HILLIARD, OH 43026
2 5 05/12/21 S123456 JEK JEK MC-3500 CHAMBER EXAMPLE PROJECT DATE DRWN CHKD DESCRIPTION 0 15' 30'
StormTechChamber System
888-892-2694 | WWW.STORMTECH.COM
®
NOTES
· MANIFOLD SIZE TO BE DETERMINED BY SITE DESIGN ENGINEER. SEE TECHNICAL NOTE 6.32 FOR MANIFOLD SIZING GUIDANCE.
· DUE TO THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS, IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD COMPONENTS IN THE FIELD. · THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER COVER REQUIREMENTS ARE MET.
· THIS CHAMBER SYSTEM WAS DESIGNED WITHOUT SITE-SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR DETERMINING THE SUITABILITY OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS PROVIDED.
24" ADS N-12 BOTTOM CONNECTION
INVERT 2.06" ABOVE CHAMBER BASE
(SEE NOTES)
18" X 18" ADS N-12 TOP MANIFOLD
INVERT 20.03" ABOVE CHAMBER BASE
(SEE NOTES)
6" ADS N-12 DUAL WALL PERFORATED HDPE UNDERDRAIN
(SIZE TBD BY ENGINEER / SOLID OUTSIDE PERIMETER STONE)

INSPECTION PORT PROPOSED STRUCTURE W/ELEVATED BYPASS MANIFOLD MAXIMUM INLET FLOW 16.2 CFS
(DESIGN BY ENGINEER / PROVIDED BY OTHERS)

PROPOSED OUTLET CONTROL STRUCTURE
MAXIMUM OUTLET FLOW 11.0 CFS
(DESIGN BY ENGINEER / PROVIDED BY OTHERS)

ISOLATOR ROW PLUS
(SEE DETAIL )
PLACE MINIMUM 17.5' OF ADSPLUS175 WOVEN GEOTEXTILE OVER

BEDDING STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR

PROTECTION AT ALL CHAMBER INLET ROWS
18" PARTIAL CUT END CAP, PART# MC3500IEPP18TC OR
MC3500IEPP18TW
TYP OF ALL MC-3500 18" TOP CONNECTIONS
18" PARTIAL CUT END CAP, PART# MC3500IEPP18BC OR MC3500IEPP18BW TYP OF ALL MC-3500 18" BOTTOM CONNECTIONS
24" PARTIAL CUT END CAP, PART# MC3500IEPP24BC OR MC3500IEPP24BW TYP OF ALL MC-3500 24" BOTTOM CONNECTIONS AND ISOLATOR PLUS ROWS PROPOSED LAYOUT 60 STORMTECH MC-3500 CHAMBERS
12 STORMTECH MC-3500 END CAPS
12 STONE ABOVE (in)
9 STONE BELOW (in)
40 % STONE VOID
12,149 INSTALLED SYSTEM VOLUME (CF) (PERIMETER STONE INCLUDED) 3,674 SYSTEM AREA (ft²)
280 SYSTEM PERIMETER (ft)
PROPOSED ELEVATIONS 979.50 MAXIMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED) 973.50 MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC)
973.00 MINIMUM ALLOWABLE GRADE (UNPAVED NO TRAFFIC)
973.00 MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT) 973.00 MINIMUM ALLOWABLE GRADE (TOP OF RIGID PAVEMENT)
972.50 TOP OF STONE
971.50 TOP OF MC-3500 CHAMBER
969.42 18" TOP MANIFOLD INVERT
967.92 24" BOTTOM CONNECTION INVERT
967.92 24" ISOLATOR ROW PLUS CONNECTION INVERT
967.90 18" BOTTOM MANIFOLD INVERT
967.75 BOTTOM OF MC-3500 CHAMBER
967.00 UNDERDRAIN INVERT
967.00 BOTTOM OF STONE
18" X 18" ADS N-12 BOTTOM MANIFOLD
INVERT 1.77" ABOVE CHAMBER BASE
(SEE NOTES)

22.25'20.25'

96.15'

89.77'

41.00'

43.60'

71.86'

61.10'
2 StormTech MC-3500 Chamber
Designed to meet the most stringent industry performance standards for superior structural integrity while providing designers with a cost-effective method to save valuable land and protect water resources. The StormTech system is designed primarily to be used under parking lots, thus maximizing land usage for private (commercial) and public applications. StormTech chambers can also be used in conjunction with Green Infrastructure, thus enhancing the performance and extending the service life of these practices.

MC-3500 Chamber (not to scale)
Nominal Specifications
Size (LxWxH) 90” x 77” x 45”
(2286 x 1956 x 1143 mm)
Chamber Storage 109.9 ft3
(3.11 m3)
Min. Installed Storage* 175.0 ft3
(4.96 m3)
Weight 134 lbs (60.8 kg)
*Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below chambers, 6” (150 mm) of stone between chambers/end caps and 40% stone porosity.

MC-3500 Chamber (not to scale)
Nominal Specifications
Size (LxWxH) 26.5” x 71” x 45.1”
(673 x 1803 x 1145 mm)
End Cap Storage 14.9 ft3
(0.42 m3)
Min. Installed Storage* 45.1 ft3
(1.28 m3)
Weight 49 lbs (22.2 kg)
*Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below, 6” (150 mm) of stone perimeter, 6” (150 mm) of stone between chambers/end caps and 40% stone
porosity.

Shipping
15 chambers/pallet
7 end caps/pallet
7 pallets/truck
3 Storage Volume Per Chamber/End Cap ft3 (m3)
Bare
Unit
Storage
ft3
(m3
)
Chamber/End Cap and Stone
Volume — Stone Foundation
Depth in. (mm)
9 (230)
12 (300)
15 (375)
18 (450)
Chamber 109.9
(3.11)
175.0
(4.96)
179.9
(5.09)
184.9
(5.24)
189.9
(5.38)
End Cap 14.9
(0.42)

45.1 (1.28)

46.6 (1.32)

48.3 (1.37)

49.9 (1.41)
Note: Assumes 6” (150 mm) row spacing, 40% stone porosity, 12” (300 mm) stone above and includes the bare chamber/end cap volume.

Volume of Excavation Per Chamber/End Cap yd3 (m3)
Stone Foundation Depth
9”
(230 mm)
12”
(300 mm)
15”
(375 mm)
18”
(450 mm)
Chamber 11.9 (9.1) 12.4 (9.5) 12.8 (9.8) 13.3 (10.2)
End Cap 4.0 (3.1) 4.1 (3.2) 4.3 (3.3) 4.4 (3.4)
Note: Assumes 6” (150 mm) of separation between chamber rows and 24” (600 mm) of cover. The volume of excavation will vary as depth of cover increases.

Amount of Stone Per Chamber

ENGLISH
tons (yd3
)
Stone Foundation Depth
9” 12” 15” 18”
Chamber 8.5 (6.0) 9.1 (6.5) 9.7 (6.9) 10.4 (7.4)
End Cap 3.9 (2.8) 4.1 (2.9) 4.3 (3.1) 4.5 (3.2)
METRIC
kg (m3
) 230 mm 300 mm 375 mm 450 mm
Chamber 7711 (4.6) 8255 (5.0) 8800 (5.3) 9435 (5.7)
End Cap 3538 (2.1) 3719 (2.2) 3901 (2.4) 4082 (2.5)
Note: Assumes 12” (300 mm) of stone above and 6” (150 mm) row spacing and 6” (150 mm) of perimeter stone in front of end caps.

Special applications will be considered on a project by project basis. Please contact our application department should you have a unique application for our team to evaluate.
4 StormTech MC-7200 Chamber
Designed to meet the most stringent industry performance standards for superior structural integrity while providing designers with a cost-effective method to save valuable land and protect water resources.

The StormTech system is designed primarily to be used under parking lots, thus maximizing land usage for private (commercial) and public applications. StormTech chambers can also be used in conjunction with Green Infrastructure, thus enhancing the performance and extending the service life of these practices.

MC-7200 Chamber (not to scale)
Nominal Specifications
Size (LxWxH) 83.4” x 100” x 60”
(2120 x 2540 x 1524 mm)
Chamber Storage 175.9 ft3
(4.98 m3)
Min. Installed Storage* 267.3 ft3
(7.56 m3)
Weight 205 lbs (92.9 kg)
*Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below chambers, 9” (230 mm) of stone between chambers/end caps and 40% stone porosity.

MC-7200 Chamber (not to scale)
Nominal Specifications
Size (LxWxH) 38” x 90” x 61”
(965 x 2286 x 1549 mm)
End Cap Storage 39.5 ft3
(1.12 m3)
Min. Installed Storage* 115.3 ft3
(3.26 m3)
Weight 90.0 lbs (40.8 kg)
*Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below, 12” (300 mm) of stone perimeter, 9” (230 mm) of stone between chambers/end caps and 40% stone
porosity.

Shipping
7 chambers/pallet
5 end caps/pallet
6 pallets/truck
5 Storage Volume Per Chamber/End Cap ft3 (m3)
Bare
Unit
Storage
ft3
(m3
)
Chamber/End Cap and Stone
Volume — Stone Foundation
Depth in. (mm)
9 (230)
12 (300)
15 (375)
18 (450)
Chamber 175.9
(4.98)
267.3
(7.57)
273.3
(7.74)
279.3
(7.91)
285.2
(8.08)
End Cap 39.5
(1.12)
115.3
(3.26)
111.9
(3.17)
121.9
(3.45)
125.2
(3.54)
Note: Assumes 9” (230 mm) row spacing, 40% stone porosity, 12” (300 mm) stone above and includes the bare chamber/end cap volume. End cap volume assumes 12” (300 mm) stone perimeter in front of end cap.

Volume of Excavation Per Chamber/End Cap yd3 (m3)
Stone Foundation Depth
9”
(230 mm)
12”
(300 mm)
15”
(375 mm)
18”
(450 mm)
Chamber 17.2 (13.2) 17.7 (13.5) 18.3 (14.0) 18.8 (14.4) End Cap 9.7 (7.4) 10.0 (7.6) 10.3 (7.9) 10.6 (8.1)
Note: Assumes 9” (230 mm) of separation between chamber rows, 12” (300 mm) of perimeter in front of the end caps, and 24” (600 mm) of cover. The volume of excavation will vary as depth of cover increases.

Amount of Stone Per Chamber
ENGLISH tons
(yd3
)
Stone Foundation Depth
9” 12” 15” 18”
Chamber 11.9 (8.5) 12.6 (9.0) 13.4 (9.6) 14.6 (10.1)
End Cap 9.8 (7.0) 10.2 (7.3) 10.6 (7.6) 11.1 (7.9)
METRIC kg (m3
) 230 mm 300 mm 375 mm 450 mm
Chamber 10796 (6.5) 11431 (6.9) 12156 (7.3) 13245 (7.7) End Cap 8890 (5.3) 9253 (5.5) 9616 (5.8) 10069 (6.0)
Note: Assumes 12” (300 mm) of stone above and 9” (230 mm) row spacing and 12” (300 mm) of perimeter stone in front of end caps.

Special applications will be considered on a project by project basis. Please contact our application department should you have a unique application for our team to evaluate.
6 1.0 Product Information

1.1 Product Design
StormTech’s commitment to thorough product testing
programs, materials evaluation and adherence to
national standards has resulted in two more superior
products. Like other StormTech chambers, the MC3500 and MC-7200 are designed to meet the full scope of design requirements of the American Society of
Testing Materials (ASTM) International specification
F2787 “Standard Practice for Structural Design of
Thermoplastic Corrugated Wall Stormwater Collection
Chambers” and produced to the requirements
of the ASTM F 2418 “Standard Specification for
Polypropylene (PP) Corrugated Stormwater Collection
Chambers”.

The StormTech MC-3500 and MC-7200 chambers
provide the full AASHTO safety factors for live
loads and permanent earth loads. The ASTM F 2787
standard provides specific guidance on how to design
thermoplastic chambers in accordance with AASHTO
Section 12.12. of the AASHTO LRFD Bridge Design
Specifications. ASTM F 2787 requires that the safety
factors included in the AASHTO guidance are achieved
as a prerequisite to meeting ASTM F 2418. The three
standards provide both the assurance of product
quality and safe structural design.

The design of larger chambers in the same tradition
of our other chambers required the collaboration
of experts in soil-structure interaction, plastics and
manufacturing. Years of extensive research, including
laboratory testing and field verification, were required to produce chambers that are ready to meet both the
rigors of installation and the longevity expected by
engineers and owners.

This Design Manual provides the details and
specifications necessary for consulting engineers
to design stormwater management systems using
the MC-3500 and MC-7200 chambers. It provides
specifications for storage capacities, layout
dimensions as well as requirements for design to
ensure a long service life. The basic design concepts
for foundation and backfill materials, subgrade
bearing capacities and row spacing remain equally as
pertinent for the MC-3500 and MC-7200 as the SC-740,
SC-310 and DC-780 chamber systems. However, since
many design values and dimensional requirements
are different for these larger chambers than the SC740, SC-310 and DC-780 chambers, design manuals and installation instructions are not interchangeable.

This manual includes only those details, dimensions,
cover limits, etc for the MC-3500 and MC-7200 and is
intended to be a stand-alone design guide for the MC3500 and MC-7200 chambers. A Construction Guide specifically for these two chamber models has also
been published.

1.2 Technical Support
The StormTech Technical Services Department is
available to assist the engineer with the layout of
MC-3500 and MC-7200 chamber systems and answer
questions regarding all the StormTech chamber
models. Call the Technical Services Department,
email us at [email protected] or contact your local
StormTech representative.

1.3 MC-3500 and MC-7200 Chambers
All StormTech chambers are designed to the full
scope of AASHTO requirements without repeating
end walls or other structural reinforcing. StormTech’s
continuously curved, elliptical arch and the
surrounding angular backfill are the key components
of the structural system. With the addition of patent
pending integral stiffening ribs (Figure 5), the MC3500 and MC-7200 are assured to provide a long, safe service life. Like other StormTech chambers, the
MC-3500 and MC-7200 are produced from high quality,
impact modified resins which are tested for short-term
and long-term mechanical properties.

With all StormTech chambers, one chamber type is
used for the start, middle and end of rows. Rows are
formed by overlapping the upper joint corrugation of
the next chamber over the lower joint corrugation of
the previous chamber (Figure 6).

1.4 Chamber Joints
All StormTech chambers are designed with an
optimized joining system. The height and width of the
end corrugations have been designed to provide the
required structural safety factors while providing an
unobstructed flow path down each row.
7 1.0 Product Information
To assist the contractor, StormTech chambers are
molded with simple assembly instructions and arrows
that indicate the direction in which to build rows. The corrugation valley immediately adjacent to the lower
joint corrugation is marked “Overlap Here - Lower
Joint.” The corrugation valley immediately adjacent
to the upper joint corrugation is marked “Build This
Direction - Upper Joint.”
Two people can safely and efficiently carry and place
chambers without cumbersome connectors, special
tools or heavy equipment. Each row of chambers
must begin and end with a joint corrugation. Since
joint corrugations are of a different size than the
corrugations along the body of the chamber,
chambers cannot be field cut and installed. Only
whole MC-3500 and MC-7200 chambers can be used.

For system layout assistance contact StormTech.

1.5 MC-3500 and MC-7200 End Caps
The MC-3500 and MC-7200 end caps are easy to install.

These end caps are designed with a corrugation joint
that fits over the top of either end of the chamber. The end cap joint is simply set over the top of either of the upper or lower chamber joint corrugations (Figure 7).

The MC-3500 end cap has pipe cutting guides for
12”–24” (300 mm–600 mm) top inverts (Figure 9).

The MC-7200 end cap has pipe cutting guides for 12”–
42” (300 mm–1050 mm) bottom inverts and 12”–24”
(300 mm–600 mm) top inverts (Figure 8).

Standard and custom pre-cored end caps are
available. MC-3500 pre-cored end caps, 18” in
diameter and larger include a welded crown plate.

Figure 5 - Chamber and End Cap Components
Figure 6 - Chamber Joint Overlap Figure 7 - End Cap Joint Overlap 8 1.0 Product Information
Figure 8 - MC-7200 End Cap Inverts
Figure 9 - MC-3500 End Cap Inverts

2.1 Foundation Requirements
StormTech chamber systems can be installed in
various soil types. The subgrade bearing capacity
and the cover height over the chambers determine
the required depth of clean, crushed, angular
foundation stone below the chambers. Foundation
stone, also called bedding, is the stone between the
subgrade soils and the feet of the chamber. Flexible
structures are designed to transfer a significant
portion of both live and dead loads through the
surrounding soils. Chamber systems accomplish
this by creating load paths through the columns of
embedment stone between and around the rows
of chambers. This creates load concentrations at
the base of the columns between the rows. The
foundation stone spreads out the concentrated
loads to distributed loads that can be supported by
the subgrade soils.

Since increasing the cover height (top of chamber
to finished grade) causes increasing soil load, a
greater depth of foundation stone is necessary to
distribute the load to the subgrade soils. Table 1
and 2 specify the minimum required foundation
depths for varying cover heights and allowable
subgrade bearing capacities. These tables are based
on StormTech service loads. The minimum required
foundation depth is 9” (230 mm) for both chambers.

2.0 Foundations for Chambers
For additional guidance on foundation stone design
please see our Technical Note 6.22 - StormTech
Subgrade Performance

2.2 Weaker Soils
StormTech has not provided guidance for subgrade
bearing capacities less than 2000 pounds per square
foot [(2.0 ksf) (96 kPa)]. These soils are often highly vari- able, may contain organic materials and could
be more sensitive to moisture. A geotechnical
engineer must be consulted if soils with bearing
capacities less than 2000 psf (96 kPa) are present.
9 2.0 Foundations for Chambers
Cover
Hgt.
ft.
(m)
Minimum Bearing Resistance for Service Loads ksf (kPa)

4.4 (211)

4.3 (206)

4.2 (201)

4.1 (196)

4.0 (192)

3.9 (187)

3.8 (182)

3.7 (177)

3.6 (172)

3.5 (168)

3.4 (163)

3.3 (158)

3.2 (153)

3.1 (148)

3.0 (144)

2.9 (139)

2.8 (134)

2.7 (129)

2.6 (124)

2.5 (120)

2.4 (115)

2.3 (110)

2.2 (105)

2.1 (101)

2.0 (96)

1.5 (0.46)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)

2.0 (0.61)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)

2.5 (0.76)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
21 (525)

3.0 (0.91)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)

3.5 (1.07)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)

4.0 (1.22)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)

4.5 (1.37)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)

5.0 (1.52)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
30 (750)

5.5 (1.68)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)

6.0 (1.83)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)

6.5 (1.98)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
30 (750)

7.0 (2.13)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
30 (750)
30 (750)

7.5 (2.30)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
27 (675)
30 (750)
30 (750)
30 (750)
30 (750)

8.0 (2.44)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
30 (750)
30 (750)
30 (750)
NOTE: The design engineer is solely responsible for assessing the bearing resistance (allowable bearing capacity) of the subgrade soils and determining the depth of foundation stone. Subgrade bearing resistance should be assessed with consideration for the range of soil moisture conditions expected under a stormwater system.

Table 1 - MC-3500 Minimum Required Foundation Depth in inches (millimeters) Assumes 6” (150 mm) row spacing.

Figure 10A - MC-3500 Structural Cross Section Detail (Not to Scale) 45"
(1140 mm)
18"
(450 mm) MIN*
8'
(2.4 m)
MAX
77" (1950 mm) 12" (300 mm) TYP
12" (300 mm) MIN
6"
(150 mm) MIN

DEPTH OF STONE TO BE DETERMINED
BY SITE DESIGN ENGINEER 9" (230 mm) MIN 6" (150 mm) MIN MC-3500

END CAP

PERIMETER STONE

EXCAVATION WALL
(CAN BE SLOPED

OR VERTICAL)

PAVEMENT LAYER (DESIGNED

BY SITE DESIGN ENGINEER)
CHAMBERS SHALL BE BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".

GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35%
FINES, COMPACT IN 12" (300 mm) MAX LIFTS TO 95% PROCTOR DENSITY. SEE THE TABLE OF ACCEPTABLE FILL MATERIALS.

ADS GEOSYTHETICS 601T NON-WOVEN

GEOTEXTILE ALL AROUND CLEAN, CRUSHED,

ANGULAR EMBEDMENT STONE
CHAMBERS SHALL MEET ASTM F2418 "STANDARD

SPECIFICATION FOR POLYPROPLENE (PP) CORRUGATED
WALL STORMWATER COLLECTION CHAMBERS".

EMBEDMENT STONE SHALL BE A CLEAN, CRUSHED AND ANGULAR
STONE WITH AN AASHTO M43 DESIGNATION BETWEEN #3 AND #4

SITE DESIGN ENGINEER IS RESPONSIBLE FOR ENSURING

THE REQUIRED BEARING CAPACITY OF SOILS
*MINIMUM COVER TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm).

Special applications will be considered on a project by project basis. Please contact our applications department should you have a unique application for our team to evaluate.
10 2.0 Foundations for Chambers
Cover
Hgt.
ft.
(m)
Minimum Bearing Resistance for Service Loads ksf (kPa)

4.4 (211)

4.3 (206)

4.2 (201)

4.1 (196)

4.0 (192)

3.9 (187)

3.8 (182)

3.7 (177)

3.6 (172)

3.5 (168)

3.4 (163)

3.3 (158)

3.2 (153)

3.1 (148)

3.0 (144)

2.9 (139)

2.8 (134)

2.7 (129)

2.6 (124)

2.5 (120)

2.4 (115)

2.3 (110)

2.2 (105)

2.1 (101)

2.0 (96)

2.0 (0.61)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
21 (525)
21 (525)

2.5 (0.76)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)

3.0 (0.91)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)

3.5 (1.07)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
30 (750)

4.0 (1.22)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)

4.5 (1.37)
9 (230)
9 (230)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
33 (825)
33 (825)

5.0 (1.52)
9 (230)
9 (230)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
33 (825)
33 (825)
36 (900)

5.5 (1.68)
9 (230)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
33 (825)
33 (825)
36 (900)
36 (900)

6.0 (1.83)
12 (300)
12 (300)
12 (300)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
33 (825)
33 (825)
36 (900)
36 (900)
36 (900)

6.5 (1.98)
12 (300)
12 (300)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
33 (825)
33 (825)
36 (900)
36 (900)
36 (900)
36 (900)

7.0 (2.13)
15 (375)
15 (375)
15 (375)
15 (375)
18 (450)
18 (450)
18 (450)
18 (450)
21 (525)
21 (525)
21 (525)
24 (600)
24 (600)
24 (600)
27 (675)
27 (675)
30 (750)
30 (750)
33 (825)
36 (900)
36 (900)
36 (900)
36 (900)
36 (900)
36 (900)
NOTE: The design engineer is solely responsible for assessing the bearing resistance (allowable bearing capacity) of the subgrade soils and determining the depth of foundation stone. Subgrade bearing resistance should be assessed with consideration for the range of soil moisture conditions expected under a stormwater system.

Table 2 - MC-7200 Minimum Required Foundation Depth in inches (millimeters) Assumes 9” (230 mm) row spacing.

Figure 10B - MC-7200 Structural Cross Section Detail (Not to Scale) 24"
(600 mm) MIN*

7.0'
(2.1 m)
MAX
100" (2540 mm) 12" (300 mm) TYP
ADS GEOSYNTHETICS 601T NON-WOVEN

GEOTEXTILE ALL AROUND CLEAN, CRUSHED,

ANGULAR EMBEDMENT STONE
12" (300 mm) MIN
12" (300 mm) MIN 9"
(230 mm) MIN

DEPTH OF STONE TO BE DETERMINED
BY SITE DESIGN ENGINEER 9" (230 mm) MIN

PERIMETER STONE

EXCAVATION WALL
(CAN BE SLOPED OR VERTICAL)
MC-7200

END CAP

SITE DESIGN ENGINEER IS RESPONSIBLE FOR ENSURING

THE REQUIRED BEARING CAPACITY OF SOILS

PAVEMENT LAYER (DESIGNED

BY SITE DESIGN ENGINEER)
60"
(1524 mm)
CHAMBERS SHALL MEET ASTM F2419 "STANDARD

SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED
WALL STORMWATER COLLECTION CHAMBERS".

EMBEDMENT STONE SHALL BE A CLEAN, CRUSHED AND ANGULAR
STONE WITH AN AASHTO M43 DESIGNATION BETWEEN #3 AND #4
CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED STORMWATER COLLECTION CHAMBERS".
*MINIMUM COVER TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 30" (750 mm).

GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES, COMPACT IN 12" (300 mm) MAX LIFTS TO 95% PROCTOR DENSITY. SEE THE TABLE OF ACCEPTABLE FILL MATERIALS.

3.1 Foundation and Embedment Stone
The stone surrounding the chambers consists of the foundation stone below the chambers and embedment stone surrounding the chambers. The foundation stone and embedment stone are important components of the structural system and also provide open void space for stormwater storage. Table 3 provides the stone specifications that achieve both structural requirements and a porosity of 40% for stormwater storage. Figure 11 specifies the extents of each backfill stone location.

Once layer ‘C’ is placed, any soil/material can be placed in layer ‘D’ up to the finished grade. Most pavement subbase soils can be used to replace the materials of layer ‘C’ or ‘D’ at the design engineer’s discretion.

Table 3 - Acceptable Fill Materials
Please Note:

1. The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For example, a specification for #4 stone would state: “clean, crushed, angular NO. 4 (AASHTO m43) stone”.

2. Stormtech compaction requirements are met for ‘A’ location materials when placed and compacted in 9” (230 mm) (max) lifts using two full coverages with a vibratory compactor.

3. Where infiltration surfaces may be compromised by compaction, for standard design load conditions, a flat surface may be achieved by raking or dragging without compaction equipment. For special load designs, contact stormtech for compaction requirements.

Figure 11 - Fill Material Locations
ACCEPTABLE FILL MATERIALS: STORMTECH MC-7200 CHAMBER SYSTEMS PLEASE NOTE:

1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE".

2. STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 9" (230 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR.

3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS.

4. ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION.

NOTES:

1. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418-16a, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 60x101

2. MC-7200 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".

3. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS.

4. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS.

5. REQUIREMENTS FOR HANDLING AND INSTALLATION:
· TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. · TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3”. · TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 500 LBS/IN/IN.

AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS.

MATERIAL LOCATION DESCRIPTION AASHTO MATERIAL

CLASSIFICATIONS COMPACTION / DENSITY REQUIREMENT
D
FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE

TOP OF THE 'C' LAYER TO THE BOTTOM OF FLEXIBLE
PAVEMENT OR UNPAVED FINISHED GRADE ABOVE. NOTE THAT

PAVEMENT SUBBASE MAY BE PART OF THE 'D' LAYER
ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS.

CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS. N/A
PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED

INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND
PREPARATION REQUIREMENTS.

C
INITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOP OF THE EMBEDMENT STONE ('B' LAYER) TO 24" (600 mm)
ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT
SUBBASE MAY BE A PART OF THE 'C' LAYER.

GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR PROCESSED AGGREGATE.

MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS LAYER.

AASHTO M145¹
A-1, A-2-4, A-3
OR
AASHTO M43¹
3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 BEGIN COMPACTIONS AFTER 24" (600 mm) OF MATERIAL OVER
THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN
12" (300 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FOR WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR
PROCESSED AGGREGATE MATERIALS.

B
EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS

FROM THE FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER
ABOVE.

CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹
3, 4
A FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE
SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER. CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹ 3, 4 PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3 NO COMPACTION REQUIRED.
24"
(600 mm) MIN*
MC-7200 - 7.0' (2.1 m) MAX
MC-3500 - 8.0' (2.4m) MAX
12" (300 mm) MIN
MC-7200 - 100" (2540 mm)
MC-3500 - 77" (1946 mm)
ADS GEOSYNTHETICS 601T NON-WOVEN

GEOTEXTILE ALL AROUND CLEAN, CRUSHED,

ANGULAR STONE IN A & B LAYERS
12" (300 mm) MIN
12" (300 mm) MIN
MC-7200 - 9" (230 mm) MIN
MC-3500 - 6" (150 mm) MIN
D
C
B
A
*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED

INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR,
INCREASE COVER TO 30" (750 mm).

DEPTH OF STONE TO BE DETERMINED
BY SITE DESIGN ENGINEER 9" (230 mm) MIN

PERIMETER STONE
(SEE NOTE 4)

EXCAVATION WALL
(CAN BE SLOPED OR VERTICAL)

END CAP SUBGRADE SOILS

PAVEMENT LAYER (DESIGNED

BY SITE DESIGN ENGINEER)
MC-7200 - 60" (1524 mm)
MC-3500 - 45" (1143 mm)
Material Location Description AASHTO Material
Classifications
Compaction / Density Requirement
D Final Fill: Fill Material for layer ‘D’
starts from the top of the ‘C’ layer
to the bottom of flexible pavement
or unpaved finished grade above.

Note that pavement subbase may
be part of the ‘D’ layer.

Any soil/rock materials,
native soils, or per
engineer’s plans. check
plans for pavement
subgrade requirements.

N/A Prepare per site design engineer’s plans.

Paved installations may have stringent
material and preparation requirements.

C Initial Fill: Fill material for layer
‘C’ starts from the top of the
embedment stone (‘B’ layer) to
24” (600 mm) above the top of
the chamber. note that pavement
subbase may be a part of the ‘C’
layer.

Granular well-graded
soil/aggregate mixtures,
<35% fines or processed
aggregate.
most pavement subbase
materials can be used in
lieu of this layer.

AASHTO M1451
a-1,a-2-4,a-3
or
AASHTO M431
3, 357, 4, 467, 5, 56,
57, 6, 67, 68, 7, 78, 8,
89, 9, 10
Begin compactoins after 24” (600 mm) of
material over the chambers is reached.
compact addtional layers in 12” (300 mm) max
lifts to a min. 95% proctor density for wellgraded material and 95% relative density for processed aggregate materials.

B Embedment Stone: Fill
surrounding the chambers form
the foudation stone (‘A’ layer) to
the ‘C’ layer above.

Clean, crushed, angular
stone
AASHTO M431
3, 4
No compaction required
A Foundation Stone: Fill below
chambers from the subgrade up to
the foot (bottom) of the chamber.

Clean, crushed, angular
stone
AASHTO M431
3, 4
Plate compact or roll to achieve a flat
surface. 2 3
12 3.0 Required Materials/Row Separation

3.2 Fill Above Chambers
Refer to Table 3 and Figure 11 for acceptable fill
material above the clean, crushed, angular stone.

StormTech requires a minimum of 24” (600 mm)
from the top of the chamber to the bottom of flexible
pavement. For non-paved installations where rutting
from vehicles may occur StormTech requires a
minimum of 30” (750 mm) from top of chamber to
finished grade.

3.3 Geotextile Separation
A non-woven geotextile meeting AASHTO M288
Class 2 separation requirements must be installed
to completely envelope the system and prevent soil
intrusion into the crushed, angular stone. Overlap
adjacent geotextile rolls per AASHTO M288 separation
guidelines. Contact StormTech for a list of acceptable
geotextiles.

3.4 Parallel Row Separation/
Perpendicular Bed Separation
Parallel Row Separation
The minimum installed spacing between parallel
rows after backfilling is 9” (230 mm) for the MC7200 chambers and 6” (150mm) for the MC-3500 (measurement taken between the outside edges of
the feet). Spacers may be used for layout convenience.

Row spacing wider than the minimum spacing above
may be specified.

Perpendicular Bed Separation
When beds are laid perpendicular to each other, a
minimum installed spacing of 36” (900 mm) between
beds is required.

3.5 Special Structural Designs
StormTech engineers may provide special structural
designs to enable deeper cover depths or increase the
capacity to carry higher live loads. Special designs may utilize the additional strength that can be achieved by compaction of embedment stone or by increasing the
spacing between rows.

Increasing the spacing between chamber rows may
also facilitate the application of StormTech chambers
with either less foundation stone or with weaker
subgrade soils. This may be a good option where
vertical restrictions on site prevent the use of a deeper foundation.

Contact ADS Engineering Services for more
information on special structural designs.

System Cross Section
Minimum Row Spacing
13 4.0 Hydraulics

4.1 General
StormTech subsurface chamber systems offer
the flexibility for a variety of inlet and outlet
configurations. Contact the StormTech Technical
Services Department or your local StormTech
representative for assistance configuring inlet and
outlet connections.

The open graded stone around and under the
chambers provides a significant conveyance capacity
ranging from approximately 0.8 cfs (23 l/s) to 13
cfs (368 l/s) per MC-3500 chamber and for the MC7200 chamber. The actual conveyance capacity is dependent upon stone size, depth of foundation
stone and head of water. Although the high
conveyance capacity of the open graded stone is an
important component of the flow network, StormTech
recommends that a system of inlet and outlet
manifolds be designed to distribute and convey the
peak flow through the chamber system.

It is the responsibility of the design engineer to
provide the design flow rates and storage volumes
for the stormwater system and to ensure that the
final design meets all conveyance and storage
requirements. However, StormTech will work with the
design engineer to assist with manifold and chamber
layouts that meet the design objectives.

4.2 The Isolator® Row Plus
The Isolator Row Plus is a system that inexpensively
captures total suspended solids (TSS) and debris and
provides easy access for inspection and maintenance.

In a typical configuration, a single layer of ADS Plus
fabric is placed between the chambers and the stone
foundations. This fabric traps and filters sediments as well as protects the stone base during cleaning
and maintenance. Each installed MC-3500
chamber and MC-3500 end cap provides 42.9 ft2
(4.0 m2) and 7.5 ft2 (0.7 m2) of bottom filter area
respectively. Each installed MC-7200 chamber and
MC-7200 end cap provides 57.9 ft2 (5.4 m2) and

12.8 ft2 (1.19 m2) of bottom filter area respectively.

The Isolator Row Plus can be configured for
maintenance objectives or, in some regulatory
jurisdictions, for water quality objectives. For
water quality applications, the Isolator Row Plus
can be sized based on water quality volume or
flow rate.

All Isolator Plus Rows require: 1) a manhole for
maintenance access, 2) a means of diversion
of flows to the Isolator Row Plus 3) a high flow
bypass and 4)FLAMP (Flared End Ramp). When
used on an Isolator Row Plus, a 24” FLAMP (flared
end ramp) is attached to the inside of the inlet
pipe with a provided threaded rod and bolt. The
FLAMP then lays on top of the ADS Plus fabric..

Flow diversion can be accomplished by either a
weir in the upstream access manhole or simply by
feeding the Isolator Row Plus at a lower elevation
than the high flow bypass. Contact StormTech for
assistance sizing Isolator Plus Rows.

When additional stormwater treatment is
required, StormTech systems can be configured
using a treatment train approach where other
stormwater BMPs are located in series.

Figure 12 - StormTech Isolator Row Plus Detail
14 STORMTECH

ISOLATOR ROW PLUS

STRUCTURE WITH OVERFLOW WEIR
(48" (1200 mm) MIN. DIA. WITH 24" (600 mm)

SUMP RECOMMENDED FOR ACCESS)

OPTIONAL PRE-TREATMENT
24" (600 mm) DIA. ACCESS

PIPE REQUIRED

OVERFLOW MANIFOLD

STRUCTURE WITH OVERFLOW WEIR
(48" (1200 mm) MIN. DIA. WITH 24" (600 mm)

SUMP RECOMMENDED FOR ACCESS)

STORMTECH

CHAMBERS

4.0 Hydraulics
Table 4 - Allowable Inlet Flows*
Table 5 - Maximum Outlet Flow Rate Capacities
From StormTech Oulet Manifolds
Table 6 - Standard Distances From Base of
Chamber to Invert of Inlet and Outlet Manifolds
on StormTech End Caps
Inlet Pipe Diameter
Inches (mm)
Allowable Maximum Flow
Rate cfs (l/s)
12 (300) 2.48 (70)
15 (375) 3.5 (99)
18 (450) 5.5 (156)
24 (600) 8.5 (241) [MC-3500]
24 (600) 9.5 (269) [MC-7200]
Pipe Diameter Flow (CFS) Flow (L/S)
6” (150 mm) 0.4 11.3
8” (200 mm) 0.7 19.8
10” (250 mm) 1.0 28.3
12” (300 mm) 2.0 56.6
15” (375 mm) 2.7 76.5
18” (450 mm) 4.0 113.3
24” (600 mm) 7.0 198.2
30” (750 mm) 11.0 311.5
36” (900 mm) 16.0 453.1
42” (1050 mm) 22.0 623.0
48” (1200 mm) 28.0 792.9
MC-3500 ENDCAPS
Pipe Diameter Inv. (in) Inv. (mm)
Top
6” (150 mm) 33.21 841
8” (200 mm) 31.16 789
10” (250 mm) 29.04 738
12” (300 mm) 26.36 671
15” (375 mm) 23.39 594
18” (450 mm) 20.03 509
24” (600 mm) 14.48 369
Bottom
12” (750 mm) 1.35 34
15” (900 mm) 1.5 40
18” (1050 mm) 1.77 46
24” (1200 mm) 2.06 52
MC-7200 ENDCAPS
Pipe Diameter Inv. (in) Inv. (mm)
Top
12” (300 mm) 35.69 907
15” (375 mm) 32.72 831
18” (450 mm) 29.36 746
24” (600 mm) 23.05 585
Bottom
12” (750 mm) 1.55 34
15” (900 mm) 1.7 43
18” (1050 mm) 1.97 50
24” (1200 mm) 2.26 57
Figure 13 - Typical Inlet Configuration With
Isolator Row Plus and Scour Protection

4.3 Inlet Manifolds
The primary function of the inlet manifold is to convey and distribute flows to a sufficient number of rows in
the chamber bed such that there is ample conveyance
capacity to pass the peak flows without creating an
unacceptable backwater condition in upstream piping
or scour the foundation stone under the chambers.

Manifolds are connected to the end caps either at the
top or bottom of the end cap. Standard distances from
the base of chamber to the invert of inlet and outlet
manifolds connecting to StormTech end caps can
be found in table 6. High inlet flow rates from either
connection location produce a shear scour potential of
the foundation stone. Inlet flows from top inlets also
produce impingement scour potential. Scour potential
is reduced when standing water is present over the
foundation stone. However, for safe design across
the wide range of applications, StormTech assumes
minimal standing water at the time the design flow
occurs.

To minimize scour potential, StormTech recommends
the installation of woven scour protection fabric at
each inlet row. This enables a protected transition
zone from the concentrated flow coming out of the
inlet pipe to a uniform flow across the entire width of the chamber for both top and bottom connections.

Allowable flow rates for design are dependent upon:
the elevation of inlet pipe, foundation stone size
and scour protection. With an appropriate scour
protection geotextile installed from the end cap to
at least 14.5 ft (4.42 m) in front of the inlet pipe for the MC-3500 and for the MC-7200, for both top and
bottom feeds, the flow rates listed in Table 4 can be
used for all StormTech specified foundation stone
gradations.
*See StormTech’s Tech Note 6.32 for manifold sizing
guidance.
*Assumes appropriate length of scour fabric per section 4.3 15 5.0 Cumulative Storage Volumes

4.4 Outlet Manifolds
The primary function of the outlet manifold is
to convey peak flows from the chamber system
to the outlet control structure. Outlet manifolds
are often sized for attenuated flows. They
may be smaller in diameter and have fewer
row connections than inlet manifolds. In some
applications however, the intent of the outlet
piping is to convey an unattenuated bypass flow
rate and manifolds may be sized similar to inlet
manifolds.

Since chambers are generally flowing at or near
full at the time of the peak outlet flow rate,
scour is generally not governing and outlet
manifold sizing is based on pipe flow equations.

In most cases, StormTech recommends that
outlet manifolds connect the same rows that are
connected to an inlet manifold. This provides
a continuous flow path through open conduits
to pass the peak flow without dependence on
passing peak flows through stone.

The primary function of the underdrains is to draw
down water stored in the stone below the invert of
the manifold. Underdrains are generally not sized
for conveyance of the peak flow.

The maximum outlet flow rate capacities from
StormTech outlet manifolds can be found in
Table 5.

4.5 Inserta Tee® Inlet Connections
Figure 15 - Inserta Tee Detail
Figure 14 - Typical Inlet, Outlet and Underdrain
Configuration
BED

PERIMETER

STORMTECH

CHAMBERS
OUTLET

MANIFOLD
INLET

MANIFOLD
SCOUR

PROTECTION

NUMBER AND SIZE

OF UNDERDRAIN(S)
PER ENGINEER’S
DESIGN

OUTLET CONTROL STRUCTURE
(PER ENGINEER’S DESIGN/PROVIDED BY OTHERS)

CONVEYANCE

PIPE MATERIAL

MAY VARY (PVC,
HDPE, ETC.)

INSERTA TEE

CONNECTION

PLACE ADS PLUS WOVEN

GEOTEXTILE (CENTERED ON

INSERTA-TEE INLET) OVER BEDDING

STONE FOR SCOUR PROTECTION AT

SIDE INLET CONNECTIONS,
GEOTEXTILE MUST EXTEND 6”
(150 mm) PAST CHAMBER FOOT
MC-7200
Depth of Water
in System
Inches (mm)
Cumulative
Chamber
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
66 (1676) 0.00 175.02 (4.956)
65 (1651) 0.00 173.36 (4.909)
64 (1626) 0.00 171.71 (4.862)
63 (1600) 0.00 170.06 (4.816)
62 (1575) 0.00 168.41 (4.7.69)
61 (1549) 0.00 166.76 (4.722)
60 (1524) 0.00 165.10 (4.675)
59 (1499) 0.00 163.45 (4.628)
58 (1473) 0.00 161.80 (4.582)
57 (1448) 0.00 160.15 (4.535)
56 (1422) 0.00 158.49 (4.488)
55 (1397) 0.00 156.84 (4.441)
54 (1372) 109.95 (3.113) 155.19 (4.394)
53 (1346) 109.89 (3.112) 153.50 (4.347)
52 (1321) 109.69 (3.106) 151.73 (4.297)
51 (1295) 109.40 (3.098) 149.91 (4.245)
50 (1270) 109.00 (3.086) 148.01 (4.191)
49 (1245) 108.31 (3.067) 145.95 (4.133)
48 (1219) 107.28 (3.038) 143.68 (4.068)
47 (1194) 106.03 (3.003) 141.28 (4.000)
46 (1168) 104.61 (2.962) 138.77 (3.930)
45 (1143) 103.04 (2.918) 136.17 (3.856)
44 (1118) 101.33 (2.869) 133.50 (3.780)
43 (1092) 99.50 (2.818) 130.75 (3.702)
42 (1067) 97.56 (2.763) 127.93 (3.623)
41 (1041) 95.52 (2.705) 125.06 (3.541)
40 (1016) 93.39 (2.644) 122.12 (3.458)
39 (991) 91.16 (2.581) 119.14 (3.374)
38 (965) 88.86 (2.516) 116.10 (3.288)
37 (948) 86.47 (2.449) 113.02 (3.200)
36 (914) 84.01 (2.379) 109.89 (3.112)
35 (889) 81.49 (2.307) 106.72 (3.022)
34 (864) 78.89 (2.234) 103.51 (2.931)
33 (838) 76.24 (2.159) 100.27 (2.839)
16 5.0 Cumulative Storage Volumes
Table 7 – MC-3500 Incremental Storage Volume Per Chamber Assumes 40% stone porosity. Calculations are based upon a 9” (230 mm) stone base under the chambers, 12” (300 mm) of stone above chambers, and 6” (150 mm) of spacing between chambers.

Depth of Water
in System
Inches (mm)
Cumulative
Chamber
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
32 (813) 73.52 (2.082) 96.98 (2.746)
31 (787) 70.75 (2.003) 93.67 (2.652)
30 (762) 67.92 (1.923) 90.32 (2.558)
29 (737) 65.05 (1.842) 86.94 (2.462)
28 (711) 62.12 (1.759) 83.54 (2.366)
27 (686) 59.15 (1.675) 80.10 (2.268)
26 (680) 56.14 (1.590) 76.64 (2.170)
25 (635) 53.09 (1.503) 73.16 (2.072)
24 (610) 49.99 (1.416) 69.65 (1.972)
23 (584) 46.86 (1.327) 66.12 (1.872)
22 (559) 43.70 (1.237) 62.57 (1.772)
21 (533) 40.50 (1.147) 59.00 (1.671)
20 (508) 37.27 (1.055) 55.41 (1.569)
19 (483) 34.01 (0.963) 51.80 (1.467)
18 (457) 30.72 (0.870) 48.17 (1.364)
17 (432) 27.40 (0.776) 44.53 (1.261)
16 (406) 24.05 (0.681) 40.87 (1.157)
15 (381) 20.69 (0.586) 37.20 (1.053)
14 (356) 17.29 (0.490) 33.51 (0.949)
13 (330) 13.88 (0.393) 29.81 (0.844)
12 (305) 10.44 (0.296) 26.09 (0.739)
11 (279) 6.98 (0.198) 22.37 (0.633)
10 (254) 3.51 (0.099) 18.63 (0.527)
9 (229) 0.00 14.87 (0.421)
8 (203) 0.00 13.22 (0.374)
7 (178) 0.00 11.57 (0.328)
6 (152) 0.00 9.91 (0.281)
5 (127) 0.00 8.26 (0.234)
4 (102) 0.00 6.61 (0.187)
3 (76) 0.00 4.96 (0.140)
2 (51) 0.00 3.30 (0.094)
1 (25) 0.00 1.65 (0.047)
NOTE: Add 1.65 ft3 (0.047 m3) of storage for each additional inch (25 mm) of stone foundation. Contact StormTech for cumulative volume spreadsheets in digital format.

Stone
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Stone
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Tables 7 and 8 provide cumulative storage volumes for the MC-3500 chamber and end cap. These tables can be used to calculate the stage-storage relationship for the retention or detention system. Digital spreadsheets in which the number of chambers and end caps can be input for quick cumulative storage calculations are available at www.stormtech.com. For assistance with site-specific calculations or input into routing software, contact the StormTech Technical Services Department. 17 5.0 Cumulative Storage Volume
Table 8 – MC-3500 Incremental Storage Volume Per End Cap Assumes 40% stone porosity. Calculations are based upon a 9” (230 mm) stone base under the chambers, 12” (300 mm) of stone above end caps, and 6” (150 mm) of spacing between end caps and 6” (150 mm) of stone perimeter.

Depth of Water
in System
Inches (mm)
Cumulative
End Cap
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
66 (1676) 0.00 45.10 (1.277)
65 (1651) 0.00 44.55 (1.262)
64 (1626) 0.00 44.00 (1.246)
63 (1600) 0.00 43.46 (1.231)
62 (1575) 0.00 42.91 (1.2.15)
61 (1549) 0.00 42.36 (1.200)
60 (1524) 0.00 41.81 (1.184)
59 (1499) 0.00 41.27 (1.169)
58 (1473) 0.00 40.72 (1.153)
57 (1448) 0.00 40.17 (1.138)
56 (1422) 0.00 39.62 (1.122)
55 (1397) 0.00 39.08 (1.107)
54 (1372) 15.64 (0.443) 38.53 (1.091)
53 (1346) 15.64 (0.443) 37.98 (1.076)
52 (1321) 15.63 (0.443) 37.42 (1.060)
51 (1295) 15.62 (0.442) 36.85 (1.043)
50 (1270) 15.60 (0.442) 36.27 (1.027)
49 (1245) 15.56 (0.441) 35.68 (1.010)
48 (1219) 15.51 (0.439) 35.08 (0.993)
47 (1194) 15.44 (0.437) 34.47 (0.976)
46 (1168) 15.35 (0.435) 33.85 (0.959)
45 (1143) 15.25 (0.432) 33.22 (0.941)
44 (1118) 15.13 (0.428) 32.57 (0.922)
43 (1092) 14.99 (0.424) 31.91 (0.904)
42 (1067) 14.83 (0.420) 31.25 (0.885)
41 (1041) 14.65 (0.415) 30.57 (0.866)
40 (1016) 14.45 (0.409) 29.88 (0.846)
39 (991) 14.24 (0.403) 29.18 (0.826)
38 (965) 14.00 (0.396) 28.48 (0.806)
37 (948) 13.74 (0.389) 27.76 (0.786)
36 (914) 13.47 (0.381) 27.04 (0.766)
35 (889) 13.18 (0.373) 26.30 (0.745)
34 (864) 12.86 (0.364) 25.56 (0.724)
Depth of
Water
in System
Inches (mm)
Cumulative
Chamber
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
33 (838) 12.53 (0.355) 24.82 (0.703)
32 (813) 12.18 (0.345) 24.06 (0.681)
31 (787) 11.81 (0.335) 23.30 (0.660)
30 (762) 11.42 (0.323) 22.53 (0.638)
29 (737) 11.01 (0.312) 21.75 (0.616)
28 (711) 10.58 (0.300) 20.96 (0.594)
27 (686) 10.13 (0.287) 20.17 (0.571)
26 (680) 9.67 (0.274) 19.37 (0.549)
25 (635) 9.19 (0.260) 18.57 (0.526)
24 (610) 8.70 (0.246) 17.76 (0.503)
23 (584) 8.19 (0.232) 16.94 (0.480)
22 (559) 7.67 (0.217) 16.12 (0.456)
21 (533) 7.13 (0.202) 15.29 (0.433)
20 (508) 6.59 (0.187) 14.45 (0.409)
19 (483) 6.03 (0.171) 13.61 (0.385)
18 (457) 5.46 (0.155) 12.76 (0.361)
17 (432) 4.88 (0.138) 11.91 (0.337)
16 (406) 4.30 (0.122) 11.06 (0.313)
15 (381) 3.70 (0.105) 10.20 (0.289)
14 (356) 3.10 (0.088) 9.33 (0.264)
13 (330) 2.49 (0.071) 8.46 (0.240)
12 (305) 1.88 (0.053) 7.59 (0.215)
11 (279) 1.26 (0.036) 6.71 (0.190)
10 (254) 0.63 (0.018) 5.83 (0.165)
9 (229) 0.00 4.93 (0.139)
8 (203) 0.00 4.38 (0.124)
7 (178) 0.00 3.83 (0.108)
6 (152) 0.00 3.28 (0.093)
5 (127) 0.00 2.74 (0.077)
4 (102) 0.00 2.19 (0.062)
3 (76) 0.00 1.64 (0.046)
2 (51) 0.00 1.09 (0.031)
1 (25) 0.00 0.55 (0.015)
NOTE: Add 0.56 ft3
(0.016 m3) of storage for each additional inch (25 mm) of stone foundation. Contact StormTech for cumulative volume spreadsheets in digital format.

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Stone
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18 5.0 Cumulative Storage Volumes
Table 9 – MC-7200 Incremental Storage Volume Per Chamber Assumes 40% stone porosity. Calculations are based upon a 9” (230 mm) stone base under the chambers, 12” (300 mm) of stone above chambers, and 9” (230 mm) of spacing between chambers.

Depth of Water
in System
Inches (mm)
Cumulative
Chamber
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
81 (2057) 0.00 267.30 (7.569)
80 (2032) 0.00 265.30 (7.512)
79 (2007) 0.00 263.30 (7.456)
78 (1981) 0.00 261.31 (7.399)
77 (1956) 0.00 259.31 (7.343)
76 (1930) 0.00 257.31 (7.286)
75 (1905) 0.00 255.32 (7.230)
74 (1880) 0.00 253.32 (7.173)
73 (1854) 0.00 251.32 (7.117)
72 (1829) 0.00 249.33 (7.060)
71 (1803) 0.00 247.33 (7.004)
70 (1778) 0.00 245.33 (6.947)
69 (1753) 175.90 (4.981) 243.33 (6.890)
68 (1727) 175.84 (4.979) 241.30 (6.833)
67 (1702) 175.65 (4.974) 239.19 (6.773)
66 (1676) 175.38 (4.966) 237.03 (6.712)
65 (1651) 175.02 (4.956) 234.82 (6.649)
64 (1626) 174.56 (4.943) 232.54 (6.585)
63 (1600) 173.82 (4.922) 230.10 (6.516)
62 (1575) 172.72 (4.891) 227.45 (6.441)
61 (1549) 171.41 (4.854) 224.66 (6.362)
60 (1524) 169.91 (4.811) 221.76 (6.280)
59 (1499) 168.25 (4.764) 218.77 (6.195)
58 (1473) 166.46 (4.714) 215.70 (6.108)
57 (1448) 164.53 (4.659) 212.55 (6.019)
56 (1422) 162.50 (4.602) 209.33 (5.928)
55 (1397) 160.36 (4.541) 206.05 (5.835)
54 (1372) 158.11 (4.477) 202.70 (5.740)
53 (1346) 155.77 (4.411) 199.30 (5.644)
52 (1321) 153.33 (4.342) 195.84 (5.546)
51 (1295) 150.81 (4.271) 192.33 (5.446)
50 (1270) 148.21 (4.197) 188.78 (5.346)
49 (1245) 145.53 (4.121) 185.17 (5.244)
48 (1219) 142.78 (4.043) 181.52 (5.140)
47 (1194) 139.96 (3.963) 177.83 (5.036)
46 (1168) 137.07 (3.881) 174.10 (4.930)
45 (1143) 134.11 (3.798) 170.33 (4.823)
44 (1118) 131.09 (3.712) 166.52 (4.715)
43 (1092) 128.01 (3.625) 162.68 (4.607)
42 (1067) 124.88 (3.536) 158.80 (4.497)
41 (1041) 121.68 (3.446) 154.89 (4.386)
Depth of Water
in System
Inches (mm)
Cumulative
Chamber
Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
40 (1016) 118.44 (3.354) 150.94 (4.274)
39 (991) 115.14 (3.260) 146.97 (4.162)
38 (965) 111.80 (3.166) 142.96 (4.048)
37 (948) 108.40 (3.070) 138.93 (3.934)
36 (914) 104.97 (2.972) 134.87 (3.819)
35 (889) 101.48 (2.874) 130.78 (3.703)
34 (864) 97.96 (2.774) 126.67 (3.587)
33 (838) 94.39 (2.673) 122.54 (3.470)
32 (813) 90.79 (2.571) 118.38 (3.352)
31 (787) 87.14 (2.468) 114.19 (3.234)
30 (762) 83.46 (2.363) 109.99 (3.114)
29 (737) 79.75 (2.258) 105.76 (2.995)
28 (711) 76.00 (2.152) 101.52 (2.875)
27 (686) 72.22 (2.045) 97.25 (2.754)
26 (680) 68.41 (1.937) 92.97 (2.632)
25 (610) 64.56 (1.828) 88.66 (2.511)
24 (609) 60.69 (1.719) 84.34 (2.388)
23 (584) 56.80 (1.608) 80.01 (2.266)
22 (559) 52.87 (1.497) 75.66 (2.142)
21 (533) 48.92 (1.385) 71.29 (2.019)
20 (508) 44.95 (1.273) 66.91 (1.895)
19 (483) 40.96 (1.160) 62.52 (1.770)
18 (457) 36.94 (1.046) 58.11 (1.646)
17 (432) 32.91 (0.932) 53.69 (1.520)
16 (406) 28.85 (0.817) 49.26 (1.395)
15 (381) 24.78 (0.702) 44.82 (1.269)
14 (356) 20.69 (0.586) 40.37 (1.143)
13 (330) 16.58 (0.469) 35.91 (1.017)
12 (305) 12.46 (0.353) 31.44 (0.890)
11 (279) 8.32 (0.236) 26.96 (0.763)
10 (254) 4.17 (0.118) 22.47 (0.636)
9 (229) 0.00 17.97 (0.509)
8 (203) 0.00 15.98 (0.452)
7 (178) 0.00 13.98 (0.396)
6 (152) 0.00 11.98 (0.339)
5 (127) 0.00 9.99 (0.283)
4 (102) 0.00 7.99 (0.226)
3 (76) 0.00 5.99 (0.170)
2 (51) 0.00 3.99 (0.113)
1 (25) 0.00 2.00 (0.057)
NOTE: Add 2.00 ft3
(0.057 m3) of storage for each additional inch (25 mm) of stone foundation. Contact StormTech for cumulative volume spreadsheets in digital format.

Tables 9 and 10 provide cumulative storage volumes for the MC-7200 chamber and end cap. These tables can be used to calculate the stage-storage relationship for the retention or detention system. Digital spreadsheets in which the number of chambers and end caps can be input for quick cumulative storage calculations are available at www.stormtech.com. For assistance with site-specific calculations or input into routing software, contact the StormTech Technical Services Department.

Stone
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Stone
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19 5.0 Cumulative Storage Volumes
Table 10 – MC-7200 Incremental Storage Volume Per End Cap Assumes 40% stone porosity. Calculations are based upon a 9” (230 mm) stone base under the chambers, 12” (300 mm) of stone above end caps, and 9” (230 mm) of spacing between end caps and 6” (150 mm) of stone perimeter.

Depth of Water
in System
Inches (mm)
Cumulative
End Cap Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
81 (2057) 0.00 115.28 (3.264)
80 (2032) 0.00 114.15 (3.232)
79 (2007) 0.00 113.02 (3.200)
78 (1981) 0.00 111.89 (3.168)
77 (1956) 0.00 110.76 (3.136)
76 (1930) 0.00 109.63 (3.104)
75 (1905) 0.00 108.50 (3.072)
74 (1880) 0.00 107.37 (3.040)
73 (1854) 0.00 106.24 (3.008)
72 (1829) 0.00 105.11 (2.976)
71 (1803) 0.00 103.98 (2.944)
70 (1778) 0.00 102.85 (2.912)
69 (1753) 39.54 (1.120) 101.72 (2.880)
68 (1727) 39.53 (1.119) 100.58 (2.848)
67 (1702) 39.50 (1.118) 99.43 (2.816)
66 (1676) 39.45 (1.117) 98.27 (2.783)
65 (1651) 39.38 (1.115) 97.10 (2.750)
64 (1626) 39.30 (1.113) 95.92 (2.716)
63 (1600) 39.19 (1.110) 94.73 (2.682)
62 (1575) 39.06 (1.106) 93.52 (2.648)
61 (1549) 38.90 (1.101) 92.29 (2.613)
60 (1524) 38.71 (1.096) 91.04 (2.578)
59 (1499) 38.49 (1.090) 89.78 (2.542)
58 (1473) 38.24 (1.083) 88.50 (2.506)
57 (1448) 37.97 (1.075) 87.21 (2.469)
56 (1422) 37.67 (1.067) 85.90 (2.432)
55 (1397) 37.34 (1.057) 84.57 (2.395)
54 (1372) 36.98 (1.047) 83.23 (2.357)
53 (1346) 36.60 (1.036) 81.87 (2.318)
52 (1321) 36.19 (1.025) 80.49 (2.279)
51 (1295) 35.75 (1.012) 79.10 (2.240)
50 (1270) 35.28 (0.999) 77.69 (2.200)
49 (1245) 34.79 (0.985) 76.26 (2.159)
48 (1219) 34.27 (0.970) 74.82 (2.119)
47 (1194) 33.72 (0.955) 73.36 (2.077)
46 (1168) 33.15 (0.939) 71.89 (2.036)
45 (1143) 32.57 (0.922) 70.40 (1.994)
44 (1118) 31.96 (0.905) 68.91 (1.951)
43 (1092) 31.32 (0.887) 67.40 (1.909)
42 (1067) 30.68 (0.869) 65.88 (1.866)
41 (1041) 30.00 (0.850) 64.35 (1.822)
Depth of Water
in System
Inches (mm)
Cumulative
End Cap Storage
ft3
(m3)
Total System
Cumulative
Storage
ft3
(m3)
40 (1016) 29.30 (0.830) 62.80 (1.778)
39 (991) 28.58 (0.809) 61.23 (1.734)
38 (965) 27.84 (0.788) 59.65 (1.689)
37 (948) 27.07 (0.767) 58.07 (1.644)
36 (914) 26.29 (0.744) 56.46 (1.599)
35 (889) 25.48 (0.722) 54.85 (1.553)
34 (864) 24.66 (0.698) 53.23 (1.507)
33 (838) 23.83 (0.675) 51.60 (1.461)
32 (813) 22.98 (0.651) 49.96 (1.415)
31 (787) 22.12 (0.626) 48.31 (1.368)
30 (762) 21.23 (0.601) 46.65 (1.321)
29 (737) 20.32 (0.575) 44.97 (1.273)
28 (711) 19.40 (0.549) 43.29 (1.226)
27 (686) 18.48 (0.523) 41.61 (1.178)
26 (680) 17.54 (0.497) 39.91 (1.130)
25 (610) 16.59 (0.470) 38.21 (1.082)
24 (609) 15.62 (0.442) 36.50 (1.033)
23 (584) 14.64 (0.414) 34.78 (0.985)
22 (559) 13.66 (0.387) 33.07 (0.936)
21 (533) 12.66 (0.359) 31.33 (0.887)
20 (508) 11.65 (0.330) 29.60 (0.838)
19 (483) 10.63 (0.301) 27.85 (0.3789)
18 (457) 9.60 (0.272) 26.11 (0.739)
17 (432) 8.56 (0.242) 24.35 (0.690)
16 (406) 7.51 (0.213) 22.59 (0.640)
15 (381) 6.46 (0.183) 20.83 (0.590)
14 (356) 5.41 (0.153) 19.07 (0.540)
13 (330) 4.35 (0.123) 17.31 (0.490)
12 (305) 3.28 (0.093) 15.53 (0.440)
11 (279) 2.19 (0.062) 13.75 (0.389)
10 (254) 1.11 (0.031) 11.97 (0.339)
9 (229) 0.00 10.17 (0.288)
8 (203) 0.00 9.04 (0.256)
7 (178) 0.00 7.91 (0.224)
6 (152) 0.00 6.78 (0.192)
5 (127) 0.00 5.65 (0.160)
4 (102) 0.00 4.52 (0.128)
3 (76) 0.00 3.39 (0.096)
2 (51) 0.00 2.26 (0.064)
1 (25) 0.00 1.13 (0.032)
NOTE: Add 1.08 ft3
(0.031 m3) of storage for each additional inch (25 mm) of stone foundation. Contact StormTech for cumulative volume spreadsheets in digital format.

Stone
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Stone
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20 6.0 MC-3500 Chamber System Sizing
The following steps provide the calculations necessary
for preliminary sizing of an MC-3500 chamber system.

For custom bed configurations to fit specific sites,
contact the StormTech Technical Services Department
or your local StormTech representative.
1) Determine the amount of storage volume
(VS) required. It is the design engineer’s sole
responsibility to determine the storage volume
required.
6) Determine the required bed size (S).

The size of the bed will depend on the number of
chambers and end caps required:

MC-3500 area per chamber = 49.6 ft2
(4.6 m2)
MC-3500 area per end cap = 16.4 ft2 (1.5 m2)
S = (C x area per chamber) + (EC x area per end cap)
NOTE: It is necessary to add 12” (300 mm) of stone
perimeter parallel to the chamber rows and 6” (150 mm)
of stone perimeter from the base of all end caps. The
additional area due to perimeter stone is not included in the area numbers above.
7) Determine the amount of stone (Vst) required.

To calculate the total amount of clean, crushed,
angular stone required, multiply the number of
chambers (C) and the number of end caps (EC) by the
selected weight of stone from Table 12.

NOTE: Clean, crushed, angular stone is also required
around the perimeter of the system.

Table 11 - Storage Volume Per Chamber/End Cap ft3 (m3)
Bare
Unit
Storage
ft3
(m3
)
Chamber/End Cap and Stone
Volume — Stone Foundation
Depth in. (mm)
9 (230)
12 (300)
15 (375)
18 (450)
MC-3500
Chamber
109.9
(3.11)
175.0
(4.96)
179.9
(5.09)
184.9
(5.24)
189.9
(5.38)
MC-3500
End Cap

14.9 (0.42)

45.1 (1.28)

46.6 (1.32)

48.3 (1.37)

49.9 (1.41)
NOTE: Assumes 6” (150 mm) row spacing, 40% stone porosity, 12” (300 mm) stone above and includes the bare chamber/end cap volume. End cap volume assumes 6” (150 mm) stone perimeter.

Table 12 - Amount of Stone Per Chamber/End Cap

ENGLISH
tons (yd3
)
Stone Foundation Depth
9” 12” 15” 18”
Chamber 8.5 (6.0) 9.1 (6.5) 9.7 (6.9) 10.4 (7.4)
End Cap 3.9 (2.8) 4.1 (2.9) 4.3 (3.1) 4.5 (3.2)
METRIC
kg (m3
) 230 mm 300 mm 375 mm 450 mm
Chamber 7711 (4.6) 8255 (5.0) 8800 (5.3) 9435 (5.7)
End Cap 3538 (2.1) 3719 (2.2) 3901 (2.4) 4082 (2.5)
NOTE: Assumes 12” (300 mm) of stone above, and 6” (150 mm) row spacing, and 6” (150 mm) of perimeter stone in front of end caps.

Table 13—Volume of Excavation Per Chamber/End Cap
yd3
(m3)
Stone Foundation Depth
9”
(230 mm)
12”
(300 mm)
15”
(375 mm)
18”
(450 mm)
Chamber 11.9 (9.1) 12.4 (9.5) 12.8 (9.8) 13.3 (10.2)
End Cap 4.0 (3.1) 4.1 (3.2) 4.3 (3.3) 4.4 (3.4)
NOTE: Assumes 6” (150 mm) separation between chamber rows, 6” (150 mm) of perimeter in front of end caps, and 24” (600 mm) of cover. The volume of excavation will vary as the depth of cover increases.
9) Determine the area of geotextile (F) required.

The bottom, top and sides of the bed must be
covered with a non-woven geotextile (filter fabric)
that meets AASHTO M288 Class 2 requirements. The
area of the sidewalls must be calculated and a 24”
(600 mm) overlap must be included for all seams.

Geotextiles typically come in 15 foot (4.57 m) wide
rolls.
2) Determine the number of chambers (C) required.

To calculate the number of chambers required for
adequate storage, divide the storage volume (Vs) by
the storage volume of the chamber (from Table 11), as
follows: C = Vs / Storage Volume per Chamber
3) Determine the number of end caps required.

The number of end caps (EC) required depends on
the number of rows required by the project. Once the
num- ber of chamber rows is determined, multiply
the number of chamber rows by 2 to determine the
number of end caps required. EC = No. of Chamber
Rows x 2
NOTE: Additional end caps may be required for systems
having inlet locations within the chamber bed.
4) Determine additional storage provided by end
caps.

End Caps will provide additional storage to the
project. Multiply the number of end caps (EC) by the
storage volume per end cap (ECS) to determine the
additional storage (As) provided by the end caps. As =
EC x ECs
5) Adjust number of chambers (C) to account
for additional end cap storage (As). The original
number of chambers (C) can now be reduced due
to the additional storage in the end caps. Divide the
additional storage (As) by the storage volume per
chamber to determine the number of chambers that
can be removed. Number of chambers to remove =
As/ volume per chamber
NOTE: Additional storage exists in the stone perimeter as well as in the inlet and outlet manifold systems. Contact StormTech’s Technical Services Department for assistance with determining the number of chambers and end caps required for your project. 8) Determine the volume of excavation (Ex) required.

Each additional foot of cover will add a volume of
excavation of 1.9 yd3
(1.5 m3) per MC-3500 chamber
and 0.6 yd3
(0.5 m3) per MC-3500 end cap.
21 2) Determine the number of chambers (C)
required.

To calculate the number of chambers required for
adequate storage, divide the storage volume (Vs) by
the storage volume of the chamber (from Table 14),
as follows: C = Vs / Storage Volume per Chamber
3) Determine the number of end caps required.

The number of end caps (EC) required depends on
the number of rows required by the project. Once
the number of chamber rows is determined, multiply
the number of chamber rows by 2 to determine the
number of end caps required. EC = No. of Chamber
Rows x 2
NOTE: Additional end caps may be required for systems having inlet locations within the chamber bed.
4) Determine additional storage provided by end
caps.

End Caps will provide additional storage to the
project. Multiply the number of end caps (EC) by the
storage volume per end cap (ECS) to determine the
additional storage (As) provided by the end caps. As
= EC x ECs
5) Adjust number of chambers (C) to account
for additional end cap storage (As). The original
number of chambers (C) can now be reduced due
to the additional storage in the end caps. Divide the
additional storage (As) by the storage volume per
chamber to determine the number of chambers that
can be removed. Number of chambers to remove =
As/ volume per chamber
NOTE: Additional storage exists in the stone perimeter as well as in the inlet and outlet manifold systems. Contact StormTech’s Technical Services Department for assistance with determining the number of chambers and end caps required for your project. 6) Determine the required bed size (S).

The size of the bed will depend on the number of
chambers and end caps required:

MC-7200 area per chamber = 59.9 ft2
(5.6 m2)
MC-7200 area per end cap = 33.9 ft2 (3.1 m2)
S = (C x area per chamber) + (EC x area per end cap)
NOTE: It is necessary to add 12” (300 mm) of stone perimeter parallel to the chamber rows and 6” (150 mm) of stone perimeter from the base of all end caps. The additional area due to perimeter stone is not included in the area numbers above.
7) Determine the amount of stone (Vst) required.

To calculate the total amount of clean, crushed,
angular stone required, multiply the number of
chambers (C) and the number of end caps (EC) by the
selected weight of stone from Table 15.

NOTE: Clean, crushed, angular stone is also required around the perimeter of the system.
8) Determine the volume of excavation (Ex) required.

Each additional foot of cover will add a volume of
excavation of 2.2 yd3 (1.7 m3) per MC-7200 chamber and

1.4 yd3 (0.8 m3) per MC-7200 end cap.
9) Determine the area of geotextile (F) required.

The bottom, top and sides of the bed must be covered
with a non-woven geotextile (filter fabric) that meets
AASHTO M288 Class 2 requirements. The area of
the sidewalls must be calculated and a 24” (600 mm)
overlap must be included for all seams. Geotextiles
typically come in 15 foot (4.57 m) wide rolls.

The following steps provide the calculations
necessary for preliminary sizing of an MC-7200
chamber system. For custom bed configurations
to fit specific sites, contact the StormTech Technical
Services Department or your local StormTech
representative.
1) Determine the amount of storage volume
(VS) required. It is the design engineer’s sole
responsibility to determine the storage volume
required.

6.0 MC-7200 Chamber System Sizing
Table 14 - Storage Volume Per Chamber/End Cap ft3
(m3)
Bare
Unit
Storage
ft3
(m3
)
Chamber/End Cap and Stone
Volume — Stone Foundation
Depth in. (mm)
9 (230)
12 (300)
15 (375)
18 (450)
MC-7200
Chamber
175.9
(4.98)
267.3
(7.57)
273.3
(7.74)
279.3
(7.91)
285.2
(8.08)
MC-7200
End Cap

39.5 (1.12)
115.3
(3.26)
118.6
(3.36)
121.9
(3.45)
125.29
(3.54)
NOTE: Assumes 9” (230 mm) row spacing, 40% stone porosity, 12” (300 mm) stone above and includes the bare chamber/end cap volume. End cap volume assumes 12” (300 mm) stone perimeter. Table 15 - Amount of Stone Per Chamber/End Cap

ENGLISH
tons (yd3
)
Stone Foundation Depth
9” 12” 15” 18”
Chamber 11.9 (8.5) 12.6 (9.0) 13.4 (9.6) 14.6 (10.1)
End Cap 9.8 (7.0) 10.2 (7.3) 10.6 (7.6) 11.1 (7.9)
METRIC
kg (m3
) 230 mm 300 mm 375 mm 450 mm
Chamber 10796 (6.5) 11431 (6.9) 12156 (7.3) 13245 (7.7) End Cap 8890 (5.3) 9253 (5.5) 9616 (5.8) 10069 (6.0)
NOTE: Assumes 12” (300 mm) of stone above, and 9” (230 mm) row spacing, and 12” (300 mm) of perimeter stone in front of end caps.

Table 13- Volume of Excavation Per Chamber/End Cap yd3 (m3) Stone Foundation Depth
9”
(230 mm)
12”
(300 mm)
15”
(375 mm)
18”
(450 mm)
Chamber 17.2 (13.2) 17.7 (13.5) 18.3 (14.0) 18.8 (14.4) End Cap 9.7 (7.4) 10.0 (7.6) 10.3 (7.9) 10.6 (8.1)
NOTE: Assumes 9” (230 mm) separation between chamber rows, 12” (300 mm) of perimeter in front of end caps, and 24” (600 mm) of cover. The volume of excavation will vary as the depth of cover increases.
22 7.0 Structural Cross Sections and Specifications
MC-3500 Stormwater Chamber Specifications

1. Chambers shall be StormTech MC-3500 or
approved equal.

2. Chambers shall be made from virgin, impactmodified polypropylene copolymers.

3. Chamber rows shall provide continuous,
unobstructed internal space with no internal
panels that would impede flow.

4. The structural design of the chambers,
the structural backfill and the installation
requirements shall ensure that the load factors
specified in the AASHTO LRFD Bridge Design
Specifications, Section 12.12 are met for: 1) longduration dead loads and 2) short-duration live loads, based on the AASHTO Design Truck with
consideration for impact and multiple vehicle
presences.

5. Chambers shall meet the requirements of ASTM
F 2418, “Standard Specification for Polypropylene
(PP) Corrugated Wall Stormwater Collection
Chambers.”

6. Chambers shall conform to the requirements of
ASTM F 2787, “Standard Practice for Structural
Design of Thermoplastic Corrugated Wall
Stormwater Collection Chambers.”
Figure 16A - MC-3500 Structural Cross Section Detail (Not to Scale)

7. Only chambers that are approved by the engineer
will be allowed. The contractor shall submit (3
sets) of the following to the engineer for approval
before delivering chambers to the project site:
• A structural evaluation by a registered structural
engineer that demonstrates that the load
factors specified in the AASHTO LRFD Bridge
Design Specifications, Section 12.12 are met. The
50-year creep modulus data specified in ASTM
F 2418 must be used as part of the AASHTO
structural evaluation to verify long-term
performance.
• Structural cross section detail on which the
structural cross section is based.

8. The installation of chambers shall be in
accordance with the manufacturer’s latest
Construction Guide.

Detail drawings available in Cad Rev. 2000 format at www.stormtech.com 45"
(1140 mm)
18"
(450 mm) MIN*
8'
(2.4 m)
MAX
77" (1950 mm) 12" (300 mm) TYP
12" (300 mm) MIN
6"
(150 mm) MIN

DEPTH OF STONE TO BE DETERMINED
BY SITE DESIGN ENGINEER 9" (230 mm) MIN 6" (150 mm) MIN MC-3500

END CAP

PERIMETER STONE

EXCAVATION WALL
(CAN BE SLOPED

OR VERTICAL)

PAVEMENT LAYER (DESIGNED

BY SITE DESIGN ENGINEER)
CHAMBERS SHALL BE BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".

GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35%
FINES, COMPACT IN 12" (300 mm) MAX LIFTS TO 95% PROCTOR DENSITY. SEE THE TABLE OF ACCEPTABLE FILL MATERIALS.

ADS GEOSYTHETICS 601T NON-WOVEN

GEOTEXTILE ALL AROUND CLEAN, CRUSHED,

ANGULAR EMBEDMENT STONE
CHAMBERS SHALL MEET ASTM F2418 "STANDARD

SPECIFICATION FOR POLYPROPLENE (PP) CORRUGATED
WALL STORMWATER COLLECTION CHAMBERS".

EMBEDMENT STONE SHALL BE A CLEAN, CRUSHED AND ANGULAR
STONE WITH AN AASHTO M43 DESIGNATION BETWEEN #3 AND #4

SITE DESIGN ENGINEER IS RESPONSIBLE FOR ENSURING

THE REQUIRED BEARING CAPACITY OF SOILS
*MINIMUM COVER TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm).

Special applications will be considered on a project by project basis. Please contact our application department should you have a unique application for our team to evaluate.

Detail drawings available in Cad Rev. 2000 format at www.stormtech.com Special applications will be considered on a project by project basis. Please contact our application department should you have a unique application for our team to evaluate.
23 7.0 Structural Cross Sections and Specifications
MC-7200 Stormwater Chamber Specifications

1. Chambers shall be StormTech MC-7200 or
approved equal.

2. Chambers shall be made from virgin, impactmodified polypropylene copolymers.

3. Chamber rows shall provide continuous,
unobstructed internal space with no internal
panels that would impede flow.

5. Chambers shall meet the requirements of ASTM
F 2418, “Standard Specification for Polypropylene
(PP) Corrugated Wall Stormwater Collection
Chambers.”

6. Chambers shall conform to the requirements of
ASTM F 2787, “Standard Practice for Structural
Design of Thermoplastic Corrugated Wall
Stormwater Collection Chambers.”
Figure 16B - MC-7200 Structural Cross Section Detail (Not to Scale)

7. Only chambers that are approved by the engineer
will be allowed. The contractor shall submit (3
sets) of the following to the engineer for approval
before delivering chambers to the project site:
• A structural evaluation by a registered
structural engineer that demonstrates that
the load factors specified in the AASHTO LRFD
Bridge Design Specifications, Section 12.12 are
met. The 50-year creep modulus data specified
in ASTM F 2418 must be used as part of the
AASHTO structural evaluation to verify longterm performance. • Structural cross section detail on which the
structural cross section is based.

8. The installation of chambers shall be in
accordance with the manufacturer’s latest
Construction Guide.
24 8.0 General Notes

1. StormTech requires installing contractors to use
and understand the latest StormTech MC-3500 and
MC-7200 Construction Guides prior to beginning
system installation.

2. StormTech offers installation consultations to
installing contractors. Contact our Technical Service
Department or local StormTech representative
at least 30 days prior to system installation to
arrange a pre-installation consultation. Our
representatives can then answer questions or
address comments on the StormTech chamber
system and inform the installing contractor of
the minimum installation requirements before
beginning the system’s construction. Call 860-529-
8188 to speak to a Technical Service Representative
or visit www.stormtech.com to receive a copy of our
Construction Guide.

3. StormTech requirements for systems with
pavement design (asphalt, concrete pavers, etc.):

Minimum cover is 18” (450mm) for the MC-3500
and 24”(600mm) for the MC-7200 not including
pavement; MC-3500 maximum cover is 8.0’ (1.98 m)
and MC-7200 maximum cover is 7.0’ (2.43 m) both
including pavement. For designs with cover depths
deeper than these maximums, please contact
Stormtech. For installations that do not include
pavement, where rutting from vehicles may occur,
minimum required cover is increased to 30” (762
mm).

4. The contractor must report any discrepancies with
the bearing capacity of the subgrade materials to
the design engineer.

5. AASHTO M288 Class 2 non-woven geotextile
(ADS601 or equal) (filter fabric) must be used as
indicated in the project plans.

6. Stone placement between chamber rows and
around perimeter must follow instructions as
indicated in the most current version of StormTech
MC-3500 / MC-7200 Construction Guides.

7. Backfilling over the chambers must follow requirements as indicated in the most current version of StormTech MC-3500 / MC-7200 Construction Guides.

8. The contractor must refer to StormTech MC-3500
/ MC-7200 Construction Guides for a Table of
Acceptable Vehicle Loads at various depths of cover.

This information is also available at the StormTech
website: www.stormtech.com. The contractor is
responsible for preventing vehicles that exceed
StormTech requirements from traveling across or
parking over the stormwater system. Temporary
fencing, warning tape and appropriately located
signs are commonly used to prevent unauthorized
vehicles from entering sensitive construction areas.

9. The contractor must apply erosion and sediment
control measures to protect the stormwater system
during all phases of site construction per local codes
and design engineer’s specifications.

10. STORMTECH PRODUCT WARRANTY IS LIMITED.

Contact StormTech for warranty information.
25 9.0 Inspection and Maintenance
Flamp (Flared End Ramp)
A typical JetVac truck (This is not a StormTech
product.)
Examples of culvert cleaning nozzles appropriate
for Isolator Row Plus maintenance. (These are not
StormTech products).

9.1 Isolator Row Plus Inspection
Regular inspection and maintenance are essential to
assure a properly functioning stormwater system.

Inspection is easily accomplished through the
manhole or optional inspection ports of an Isolator
Row Plus. Please follow local and OSHA rules for a
confined space entry.

Inspection ports can allow inspection to be
accomplished completely from the surface without
the need for a con- fined space entry. Inspection
ports provide visual access to the system with the
use of a flashlight. A stadia rod may be inserted to
determine the depth of sediment. If upon visual
inspection it is found that sediment has accumulated
to an average depth exceeding 3” (76 mm), cleanout
is required.

A StormTech Isolator Row Plus should initially be
inspected immediately after completion of the
site’s construction. While every effort should
be made to prevent sediment from entering the
system during construction, it is during this time
that excess amounts of sediments are most likely
to enter any stormwater system. Inspection and
maintenance, if necessary, should be performed
prior to passing responsibility over to the site’s
owner. Once in normal service, a StormTech Isolator
Row Plus should be inspected bi-annually until
an understanding of the sites characteristics is
developed. The site’s maintenance manager can
then revise the inspection schedule based on
experience or local requirements.

9.2 Isolator Row Plus Maintenance
JetVac maintenance is recommended if sediment
has been collected to an average depth of 3” (76
mm) inside the Isolator Row Plus. More frequent
maintenance may be required to maintain minimum
flow rates through the Isolator Row Plus. The
JetVac process utilizes a high pressure water nozzle
to propel itself down the Isolator Row Plus while
scouring and suspending sediments. As the nozzle is
retrieved, a wave of suspended sediments is flushed
back into the manhole for vacuuming. Most sewer
and pipe maintenance companies have vacuum/
JetVac combi- nation vehicles. Fixed nozzles designed
for culverts or large diameter pipe cleaning are
preferable. Rear facing jets with an effective spread
of at least 45” (1143 mm) are best. StormTech
recommends a maximum nozzle pressure of 2000
psi be utilized during cleaning. The JetVac process
shall only be performed on StormTech Rows that
have ADS Plus fabric over the foundation stone.

A Flamp (flared end ramp) is attached to the inlet
pipe on the inside of the chamber end cap to
provide a smooth transition from pipe invert to
fabric bottom. It is configured to improve chamber
function performance over time by distributing
sediment and debris that would otherwise collect at
the inlet. It also serves to improve the fluid and solid flow back into the inlet pipe during maintenance
and cleaning, and to guide cleaning and inspection
equipment back into the inlet pipe when complete.

ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com Advanced Drainage Systems, the ADS logo and the Green Stripe are registered trademarks of Advanced Drainage Systems, Inc.

StormTech® and the Isolator® Row PLUS are registered trademarks of StormTech, Inc. © 2022 Advanced Drainage Systems, Inc. #11116 3/22 CS
StormTech provides state-of-the-art products and services that meet or exceed industry performance standards and expectations. We offer designers, regulators, owners and contractors the highest quality products and services for stormwater management that Saves Valuable Land and Protects Water Resources.

A Family of Products and Services for the Stormwater Industry:
adspipe.com
800-821-6710
MC-3500 and MC-7200 Chambers and End Caps
SC-160LP, SC-310 and SC-740 Chambers & End Caps
DC-780 Chambers and End Caps
Fabricated End Caps
Fabricated Manifold Fittings
Patented Isolator Row PLUS for Maintenance and
Water Quality
Chamber Separation Spacers
In-House System Layout Assistance
On-Site Educational Seminars
Worldwide Technical Sales Group
Centralized Product Applications Department
Research and Development Team
Technical Literature, O&M Manuals and Detailed CAD
drawings all downloadable via our Website
MC-7200 MC-3500 DC-780 SC-740 SC-310 SC-160LP
Stormwater Management
Solutions

ENGINEERED SOLUTIONS
In addition to stormwater expertise, Contech
offers a wide range of innovative, flexible product
solutions engineered to solve your site’s unique
challenges and reduce long term maintenance
costs. From traditional BMP’s to LID solutions, our
ongoing investment in robust laboratory and field
evaluations ensure we have a variety of solutions to
comply with local regulations so your projects get
approved the first time.

With our responsive team of stormwater experts,
local regulatory expertise and flexible stormwater
management solutions, Contech is the trusted
partner you can count on for stormwater
management solutions.

Contech is the leader in stormwater
management solutions, helping engineers,
contractors and owners with infrastructure and
land development projects throughout North
America.

Stormwater management is becoming ever more
complex as regulations get more strict with each
permit cycle. It’s no longer enough to simply
move water away from a site — we are now often
required to retain and treat it. Traditional methods
and BMP’s simply aren’t enough.

To succeed in this rapidly changing environment,
you need a partner to help you navigate the
complexities of local, state and federal regulations
— who is responsive to your requests and provides
innovative solutions that save your clients money
and accelerate the design process.

The experts you need to solve your
stormwater management challenges
Contech is your partner in stormwater management solutions

ENGINEERED SOLUTIONS
Provides engineers with
technically focused
recommendations
Helps engineers
develop an
efficient solution
Makes sure all
recommendations
are approved locally
Supports contractors
and owners through
the entire process

STORMWATER

CONSULTANT
I work with you to
recommend the best
solution to meet
permitting requirements

STORMWATER

DESIGN ENGINEER
I help develop your final
design and deliverables

REGULATORY

MANAGER
I understand the local
stormwater regulations
and what solutions will
be approved
SALES

ENGINEER
I make sure our
solutions meet the needs
of the contractor
during construction
• Pricing and value
engineering assistance
• Project coordination
• Installation guidance
• Issue resolution
• Customer service
• Product approvals
• Regulatory stakeholder
engagement
• Field and lab evaluation
• Project-specific
regulatory support
• Engineering calculations
• Specifications
• Site-specific drawings
• Submittal packages
• Preliminary product
recommendations
• Feasibility screening
• Layout assistance
• Cost estimates and
options analysis

DESIGN SPECIFICATION PERMITTING INSTALLATION
Robertson Ranch, Carlsbad, CA: We helped reduce the land space required for stormwater treatment in this residential development, allowing for increased site amenities and improved aesthetics by providing 20 Filterra® Bioscape® Vaults that blended into the surrounding landscaping.

United Airlines Terminal, Houston, TX: Engineers first considered a 12-foot hydrodynamic separator from a competitor, but we showed how our smaller, eight-foot CDS® could meet the regulatory requirements of 70% TSS removal and lower costs for the owner.

U.S. Bank Stadium, Minneapolis, MN: Being built downtown, there was limited footprint for stormwater storage. We worked with the engineer to design a 144" diameter perforated, corrugated metal pipe retention system that provided the required storage in a constrained footprint.

Crossroads Parkway, City of Industry, CA: We provided seven Filterra® Bioretention Systems to meet the biofiltration requirement of the Los Angeles County MS4 permit; reducing the BMP footprint required in this highly developed, high land value site.

SR-28 Improvements, Incline Village, NV: A Jellyfish® Filter was installed to remove nutrients and fine sediment particles less than 16 microns to help improve the water quality of runoff entering Lake Tahoe.

How do I incorporate
bioretention on a
highly developed site?
How do I reduce
total cost of the
stormwater system?
Everything you need for compreh
EXAMPLES OF SUCCESSFUL PROJECTS WE HAVE BEEN INVOLVED IN :

How do I maximize
land value
for the owner?
City of San Jose, CA: We helped the City meet “Full Capture” trash regulations by providing seven CDS® hydrodynamic separators. Over 5,000 acres of San Jose is now protected by CDS systems, and trash from these areas will no longer make it into San Francisco Bay.

Walgreens, Ewing Township, NJ: We addressed invert constraints of the existing infrastructure and met regulatory requirements of 80% TSS removal using a CDS® hydrodynamic separator, a Peak Diversion Stormwater Management StormFilter® and a Jellyfish® Filter.

LaQuinta Inn, Portland, Maine: We helped solved a flooding problem and cut installation time in half by recommending an underground detention system CMP as an alternative solution to plastic crates. A combination of 84” and 96” CMP was used to provide 100,283 cf of storage in a very limited footprint.

Jaguar Land Rover, San Diego, CA: We provided an UrbanPond® concrete detention system and a Modular Wetlands Linear® Bioretention system to provide a hydraulically connected treatment train for a new 2.9- acre car dealership.

Bucks County Justice Center, Doylestown, PA: The contractor was under a tight timeline to get this project completed on time. We helped retrofit the existing site with seven Filterra® Bioretention Systems. All seven systems were installed and activated in a total of two days.

How do I meet
phosphorus
removal requirements?
CHECK OUT ADDITIONAL CASE STUDIES ON OUR WEBSITE - WWW.CONTECHES.COM/CASESTUDIES hensive stormwater management
Engineered bioretention systems can reduce footprint up to 95% Bioretention and biofiltration use the physical,
chemical and biological mechanisms found in nature
to capture and filter stormwater. Providing both
water quantity and quality benefits, biofiltration
is ideal for Low Impact Development (LID), Green
Infrastructure, and Environmental Site Design
projects. Plus, the presence of plants increases
biological activity and enhances the appearance of
your site.

The Filterra® Bioretention System
is an engineered, prepackaged
bioretention system incorporating
high performance biofiltration media
and plants. Its high media flow rate
reduces the footprint significantly
when compared with traditional
bioretention systems and allows
for easy integration into highly
developed sites such as commercial
areas, residential communities,
parking lots and streetscapes.

Learn more:
www.ContechES.com/filterra
Bioretention
and biofiltration

ENGINEERED SOLUTIONS

APPLICATION TIPS
• Modular, prefabricated
bioretention systems like
the Filterra® and Modular
Wetlands® Linear can be used
for both new construction and
urban retrofits.
• They can be deployed in a
variety of applications, both
standalone and as part of
an overall site plan (with
other stormwater control
techniques).
• Filterra and Modular Wetlands
Linear meet regulatory
requirements for the removal
of TSS, nutrients, and metals.

SELECT APPROVALS FILTERRA

MODULAR

WETLANDS
LINEAR
Washington Department
of Ecology (GULD) – Basic,
Enhanced, Phosphorus, and Oil
✓ ✓
New Jersey Department of
Environmental Protection
(NJDEP)
✓ ✓
Virginia Department of
Environmental Quality (VA DEQ) ✓ ✓
Maryland Department of the
Environment - Environmental
Site Design (ESD)
✓ ✓
Texas Commission on
Environmental Quality (TCEQ) ✓ ✓
Atlanta, GA Regional
Commission ✓ ✓
City of Portland, Oregon Bureau
of Environmental Services ✓ ✓
Detention
and infiltration
Detention and infiltration involves the use of
vaults, chambers and pipes to temporarily store
runoff. These structures often have open bottoms
or perforations, allowing the excess water to be
released slowly over time. In urban environments
where there are competing demands for land,
underground storage can provide many of the
benefits of landscape-based systems but without
requiring dedicated land area, thus maximizing the
land value for the owner.

Storing runoff underground frees up valuable land space Subsurface infiltration in urban
environments meets the objectives
of LID by reducing runoff and
recharging groundwater.

ENGINEERED SOLUTIONS
UrbanPond® Concrete Stormwater
Detention Systems combine a large
storage volume with fast installation.

Learn more:
www.ContechES.com/urbanpond
The Contech® CMP detention system
can be fully or partially perforated
and sized and shaped to meet sitespecific needs.

Learn more:
www.ContechES.com/dyods
Our ChamberMaxx® system is a
corrugated, open-bottom plastic
infiltration chamber providing
economic infiltration below grade.

Learn more:
www.ContechES.com/chambermaxx
DuroMaxx® steel reinforced
polyethylene (SRPE) pipe combines
steel and polyethylene to make an
exceptionally strong and durable
pipe that can be made watertight.

Learn more:
www.ContechES.com/duromaxx
DuroMaxx Rainwater Harvesting
Cisterns are available in sizes up
to 120 inches in diameter and
are leak tested and certified to be
in compliance with the Uniform
Plumbing Code (UPC®) to ensure a
reliable long term storage solution.

Learn more:
www.ContechES.com/rwh
APPLICATION TIPS • Our online Design Your
Own Detention System
(DYODS) Tool provides
instant access to project
specific drawings for the
creation of plans and
specifications.
• Corrugated metal
pipe (CMP) is the most
economical solution for
underground storage.
• Increasing the depth of a
detention system allows
for more storage in the
same footprint. Doubling
the diameter of pipe yields
four times as much storage
volume in the pipe and
reduced excavation and
backfill costs.
• Outlet control devices
can be incorporated
within a CMP detention
system, saving money by
eliminating the need for a
separate structure.
• A pretreatment device
can prolong the life of
a detention system by
removing debris and
sediment that can collect
on the invert and within
the stone backfill voids.
• Reduced long term
maintenance or
replacement cost of the
infiltration system can
help offset pretreatment
construction costs.

Filtration
Stormwater filtration systems use media or
membranes to remove total suspended solids
(TSS), hydrocarbons, nutrients, metals, and other
common pollutants from stormwater runoff.

They can be housed in a vault, manhole, or
catch basin and are used for both commercial
and residential development, redevelopment,
and stormwater quality retrofit applications.

They can also provide pretreatment for Low
Impact Development, infiltration, and rainwater
harvesting systems.

Filtration provides the highest level of treatment for stormwater runoff The Stormwater Management
StormFilter® has been field tested
more than any other manufactured
stormwater filtration device. Its
performance has been verified by the
State of Washington Department of
Ecology and New Jersey Department
of Environmental Protection.

See the StormFilter in action:
www.ContechES.com/stormfilter

ENGINEERED SOLUTIONS
Jellyfish® Filter is a stormwater quality
treatment technology featuring high
flow pretreatment and membrane
filtration in a compact standalone
system. The design treatment
flow rate can be up to 80 gpm per
cartridge.

Learn more:
www.ContechES.com/jellyfish
The Kraken® Filter utilizes advanced
membrane filtration, ensuring a high-level
of removal of TSS, metals, trash, nutrients,
and hydrocarbons. Available in vault and
manhole configurations, the Kraken filters
are lightweight and reusable, providing
maximum performance and reduced long
term maintenance costs..

Learn more:
www.ContechES.com/kraken

APPLICATION TIPS
• For applications targeting
phosphorus, Contech®
developed PhosphoSorb®,
a filter media designed to
remove both dissolved and
particulate phosphorus.
• All filters will require
periodic maintenance to
to maintain water quality
standards. Selecting
a device with a long
maintenance cycle and
low maintenance cost will
result in healthy waterways
and happy property
owners.

SELECT APPROVALS / CERTIFICATIONS JELLYFISH FILTER KRAKEN FILTER STORMFILTER Washington Department of Ecology (TAPE) (GULD) – Basic, Phosphorus ✓ ✓ ✓
New Jersey Department of Environmental Protection
(NJDEP) ✓ ✓
North Carolina Department of Environmental Quality (NC
DEQ) ✓
Sacramento Stormwater Quality Partnership (SSQP) ✓
Maryland Department of the Environment (MD DOE) ✓ ✓
Texas Commission on Environmental Quality (TCEQ) ✓ ✓
Virginia Department of Environmental Quality (VA DEQ) ✓ ✓ ✓ Canadian ISO 14034 Environmental Management –
Environmental Technology Verified (ETV) ✓ ✓ ✓
Maine Department of Environmental Protection (ME DEP) ✓ ✓ ✓ St. Louis Metropolitan Sewer District ✓
THE KRAKEN®
Hydrodynamic
separation
Hydrodynamic separators effectively remove
sediment, hydrocarbons, trash and debris from
stormwater runoff. These systems are often used
as standalone and end-of-pipe treatment in both
new and retrofit applications. They are also used
as pretreatment to detention, infiltration, reuse
and biofiltration to increase the service life of
these systems by removing pollutants upstream.

Contech® hydrodynamic separation
products have been providing reliable
stormwater treatment for more
than 20 years. Whatever your site
constraints may be, Contech’s family
of HDS systems has you covered.

TSS & trash removal are the focus of many stormwater regulations

ENGINEERED SOLUTIONS
The Cascade Separator® is the
latest innovation in hydrodynamic
separation from Contech. The
Cascade uses advanced sediment
capture technology to provide the
highest sediment removal efficiency
of any Contech HDS product.

Cascade also captures trash and
hydrocarbons.

Learn more:
www.ContechES.com/cascade
The Debris Separating Baffle Box (DSBB)
combines gravity separation and nonblocking screen technology to capture 100% of trash and debris equal to or
greater than 5 mm in diameter and meets
the California Regional Water Quality
Control Board Full Capture Certification
Requirements.

Learn more:
www.ContechES.com/dsbb

APPLICATION TIPS
• The Cascade Separator® is
optimized to capture and
retain sediment resulting in
a small footprint treatment
device.
• Both the CDS® and the
DSBB use non-blocking
screen technology
to capture and retain
trash and debris from
stormwater runoff.
• The SciCloneX® has
achieved an industryleading hydraulic loading
rate compared to other
NJDEP certified HDS
devices.

SELECT CERTIFICATIONS CASCADE CDS DSBB SCICLONEX VORTECHS Washington Department of Ecology
(GULD) - Pretreatment ✓ ✓
New Jersey Department of
Environmental Protection (NJDEP) ✓ ✓ ✓
Canadian Environmental Technology
Verification (ETV) ✓
California Statewide Trash
Amendments Full Capture System
Certified*
✓ ✓
Few companies offer the wide range of highquality stormwater resources you can find with us — state-of-the-art products, decades of
expertise, and all the maintenance support you
need to operate your system cost-effectively.

Get social with us:
800-338-1122 | www.ContechES.com
NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS

SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS

AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL

IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. © 2023 Contech Engineered Solutions LLC, a QUIKRETE Company All Rights Reserved. Printed in the USA.

Revision 03/23

ENGINEERED SOLUTIONS
A partner
you can rely on

THE CONTECH WAY
Contech® Engineered Solutions provides innovative, cost-effective site solutions to engineers, contractors and developers on projects across North America. Our portfolio includes bridges, drainage, erosion control, retaining wall, sanitary sewer and stormwater management products.

TAKE THE NEXT STEP
For more information: www.ContechES.com
Contact your local representative:
www.ContechES.com/localresources

STORMWATER

SOLUTIONS
PIPE

SOLUTIONS

STRUCTURE

SOLUTIONS

ENGINEERED SOLUTIONS
Modular Wetlands® Linear
Concrete Installation Manual
2 Overview
The Modular Wetland® Linear Biofilter is designed to remove high levels of trash, debris, sediments, nutrients, metals, and hydrocarbons. Its simple design allows for quick and easy installation. The system is housed in a standard pre-cast structure and can be installed at various depths to meet site-specific conditions.

Introduction
This is the Modular Wetlands® Linear installation manual. Before starting, make sure there is enough room for installing and assembling the product. Inspect all materials for defects and gather the recommended tools listed on the following page. The contractor shall furnish all labor, equipment, materials, and incidentals required to conduct the installation in accordance with the contract documents.

Top View
Side Cutaway View
Outflow
Inflow
Pre-filter Box
Vertical Underdrain
1 Pretreatment Chamber
2 Biofiltration Chamber
2 Biofiltration Chamber
3 Discharge Chamber
Flow Control
Riser Biofiltration Media
1 2 2 3
3 3
Perimeter Void Area End View
Side Cutaway View
Individual Media Filters
BioMediaGREEN
Pre-filter Box
1 Pretreatment Chamber
3 Discharge Chamber
1 1 Pretreatment Chamber
2 Biofiltration Chamber
3 Discharge Chamber
1 2
3 Instructions
Delivery & Unloading / Lifting
• Contech shall deliver the unit(s) to the site in coordination with the Contractor. • The Contractor may be required to provide spreader bars and chains/cables to safely and securely lift the base section, risers, and top section along with suitable lifting hooks, knuckles, shackles and eyebolts. • Please see project specific drawings for weights and lifting details. Contact Contech for additional lifting details.

Inspection
Inspection of the Modular Wetlands® Linear and all parts contained in or shipped outside of the unit shall be inspected at time of delivery by the site Engineer/Inspector and the Contractor. Any nonconformance to approved drawings or damage to any part of the system shall be documented on the Contech shipping ticket. • Damage to the unit during and after unloading shall be corrected at the expense of the Contractor. Any necessary repairs to the Modular Wetlands® Linear unit shall be made to the acceptance of the Engineer/ Inspector.

Site Preparation
• The Contractor is responsible for providing adequate and complete vault protection when the Modular Wetlands® Linear unit is installed prior to final site stabilization (full landscaping, grass cover, final paving, and street sweeping completed) to prevent construction debris or construction phase runoff from entering the unit. • The Contractor shall adhere to all jurisdictional and/or OSHA safety rules in providing temporary shoring of the excavation.
• The Contractor or Owner is responsible for appropriately barricading the Modular Wetlands® Linear unit from traffic (in accordance with local codes).
• Each Modular Wetlands® Linear unit shall be constructed based on the locations and elevations according to the sizes shown on the approved drawings. Any modifications to the elevation or location shall be at the direction of and approved by the Engineer.
• The Modular Wetlands® Linear unit shall be placed on level compacted sub-grade with a minimum 6-inch gravel base. Compact undisturbed sub-grade materials to be per Geotechnical/Soils report. Unsuitable material below sub-grade shall be replaced to site engineer’s approval. Place granular sub-base and compact to State and local standards as per the Engineers requirements.
• Once the base piece is set, the riser(s) and top section should be sealed onto the base section before backfilling, using a non-shrink grout, butyl rubber or similar waterproof seal. • Pipe connections shall be aligned and sealed to meet the approved drawings with modifications necessary to meet site conditions and local regulations. The correct connection (inlet/outlet) will be marked on the Modular Wetlands® Linear unit.
4 • NOTE: The inlet and outlet pipe cannot protrude past the structures I.D. wall as it will interfere with the internal components.
• Once the Modular Wetlands® Linear unit is set, it should be protected from construction runoff entering it.

Contractor will be responsible for cleaning if unit is contaminated by such construction runoff and associated pollutants and damaged (i.e. concrete wash water).
• Backfilling should be performed in a careful manner, bringing the appropriate fill material up in 6-inch lifts on all sides. Pre-cast sections shall be set in a manner that will result in a watertight joint. In all instances, installation of the Modular Wetlands® Linear unit shall conform to ASTM specification C891 “Standard Practice for Installation of Underground Precast Utility Structures” unless specified otherwise in contract documents. • If applicable, it is the responsibility of the Contractor to provide curb and gutter and transition to the Modular Wetlands® Linear unit for proper stormwater flow into the system through the throat, pipe or grate opening.

A standard drawing of the throat and gutter detail is available in the following section; however the plans and contract documents supersede all standard drawings. Several variations of the standard design are available.

Effective bypass for an offline Modular Wetlands® Linear unit is essential for correct operation (i.e. bypass to an overflow at lower elevation).

Installation

1. Each Modular Wetlands® Linear unit shall be constructed based on the locations and elevations according to the sizes shown on the approved drawings. Any modifications to the elevation or location shall be at the direction of and approved by the Engineer.

2. The Modular Wetlands® Linear unit shall be placed on level compacted sub-grade with a minimum 6-inch gravel base and mark the base. Compact undisturbed subgrade materials to be per Geotechnical/Soils report. Unsuitable material below sub-grade shall be replaced to site engineer’s approval. Place granular sub-base and compact to State and local standards as per the Engineer’s requirements.

Position crane in a safe and optimal position for unloading. Ensure that the crane operator has the proper weights and distance to install location to allow for proper setup. The crane operator will provide instructions to the delivery driver on where to position the truck for offload. 5 3. Pipe material selection should be indicated on the Site Plan. Connect the pipe using a Kor-N-Seal, Press Seal, Fernco, or other approved watertight boot connection. In the case of concrete pipes, grout the connection watertight with non-shrink grout.

4. Lift the vault off of the delivery truck and safely
move vault over the excavated area for installation.

Before setting the vault ensure the hole is the right
size, level, and properly sized.

5. Position the concrete vault over the excavated area
and slowly lower into position. Ensure the inlet and
outlet sides of the vault are in the correct position
and the correct elevations are verified.

The contractor is responsible to provide the appropriate rigging and lifting connectors. Spreader bars are recommended to prevent damage to the concrete vault. All lifting points on the concrete vault must be used for safe offloading. Guide ropes can be used to stabilize the vault during offloading. 6 6. Once the vault is set in place, check all four corners are in the correct position. Take tension off of the
rigging to ensure the vault is set properly and the
compacted rock backfill below is holding the weight
of the vault.

8. After pipe connections are completed, backfill in 12 inch increments and compact per local and state
requirements. If curb type configurations, pour and
connect curb and gutter system as shown in the
picture to the right.

The last step is to install the wetland media that
can be delivered in super sacks or in bulk based
on preference. Wetland Media must be stored in
a dry, temperate environment prior to installation.

Install the plant propagation blocks as shown in the
drawings below. Install the vegetation and cover
with decorative rock and mulch.

7. Use a string and or level to make sure the vault is
level in both directions. The vault cannot be more
than 0.5% slope off from level in any direction.

If the vault slopes more than 0.5%, pick back up,
move to a safe area, re-level the rock below and
reset until properly level.
7 Pipe Connections
• Pipe material selection should be indicated on the Site Plan. Connect the pipe using a Kor-N-Seal, Press Seal, Fernco, or other approved watertight boot connection. In the case of concrete pipes, grout the connection watertight with non-shrink grout
• Inlet pipe(s) shall be stubbed in and connected to the precast manhole according to the Engineer’s requirement or specifications. The Contractor is to grout all inlet pipes flush with the interior wall of the structure per plans and specifications.
• Outlet pipe shall be stubbed in and connected to the precast manhole according to the Engineer’s requirement or specifications. The Contractor is to grout all inlet pipes flush with the interior wall of the structure per plans and specifications.
• For illustration a BAD example of a pipe installation is included below. The pipe is off-center, the pipe invert is not in the appropriate position, it is protruding beyond the inside wall, the grout is not clean and properly finished. This site was corrected by re-excavating and reconnecting the pipe properly. • Once the pipes are connected, carefully backfill around them, compacting in “lifts” that will not deflect, disturb or damage them.

Example of a BAD pipe installation. Protruding past the internal wall of the structure, poor grouting, and wrong position.

Example of a GOOD pipe installation. Pipe flush with the internal wall of the structure, clean grouting, and proper position. 8 ENGINEERED SOLUTIONS
9 ENGINEERED SOLUTIONS
10 _l_ M O D U L A R.,

WETLANDS

CAST-IN-PLACE

DEPRESSED GUTTER

AND THROAT OPENING
(BY CONTRACTOR)

THREADED REBAR INSERTS

SUPPLJED BY MANUFACTURE

INSTALLED BY CONTRACTOR
SIZE AND TYPE M4Y VARY

SECTION VIEW

THROAT PROTECTION DEVICE

DO NOT REMOVE - LEAVE

IN PLACE UNTIL SITE IS

STABIUZED AND MWS UNIT

IS ACTIVATED

STANDARD MODULAR WETLAND CURB OPENING

PRECAST MWS

TOP SLAB
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�-
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�- (BY CONTRACTOR} WIDTH MAY VARY OPENING :-/�:)�.
1 THREADED REBAR INSERTS

SUPPLJED BY MANUFACTURE

INSTALLED BY CONTRACTOR
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SIZE AND TYPE M4Y VARY FRONT VIEW
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STANDARD MODULAR WETLAND CURB OPENING

MODULAR WETLAND SYSTEMS INC
PO. BOX 869
OCEANSIDE, CA 92049 �D
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_____, TITLE: MW S LIN EAR 2, Q www. Modu/orWet!onds. com

PROPRIETARY AND CONFIDENTIAL

THE INFORMATION CONTAINED IN THIS DRAWING IS

THE SOLE PROPERTY OF MODULAR WETLAND
SYSTEMS INC. ANY REPRODUCTION IN PART OR AS

A WHOLE WITHOUT THE WRITTEN PERMISSION OF
MODULAR WETLAND SYSTEMS INC. IS PROHIBITW

EDITED CURB INLET DETAILS
COMMENTS: SIZE DWG.

SCALE NTS
NO.

UNITS
REV
INCHES SHEET I OF 1
11 NOTES
___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________

SUPPORT
DRAWINGS AND SPECIFICATIONS ARE AVAILABLE AT WWW.CONTECHES.COM © 2023 CONTECH ENGINEERED SOLUTIONS LLC, A QUIKRETE COMPANY 800-338-1122
WWW.CONTECHES.COM
ALL RIGHTS RESERVED. PRINTED IN THE USA.

CONTECH ENGINEERED SOLUTIONS LLC PROVIDES SITE SOLUTIONS FOR THE CIVIL ENGINEERING INDUSTRY. CONTECH’S PORTFOLIO INCLUDES BRIDGES, DRAINAGE, SANITARY SEWER, STORMWATER AND EARTH STABILIZATION PRODUCTS. FOR INFORMATION ON OTHER CONTECH DIVISION OFFERINGS, VISIT CONTECHES.COM OR CALL 800-338-1122.

Modular Wetland Linear Install Guide 01/23
NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS

SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS

WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION.

ENGINEERED SOLUTIONS

ENGINEERED SOLUTIONS
Modular Wetlands® Linear
Operation & Maintenance Manual
2 MODULAR WETLANDS® LINEAR

OPERATION & MAINTENANCE MANUAL

TABLE OF CONTENTS
Overview........................................................................................................3 Inspection Summary....................................................................................... 4 Inspection Process..........................................................................................5 Maintenance Indicators.................................................................................. 6 Inspection Process..........................................................................................7 Maintenance Summary .................................................................................. 8 Pretreatment Chamber ................................................................ 9 Prefilter Cartridge ...................................................................... 10 Biofiltration Chamber ................................................................ 11 Discharge Chamber ................................................................... 12 Inspection Report.........................................................................................13 Cleaning and Maintenance Report................................................................ 14 3 OVERVIEW
The Modular Wetlands® Linear Biofilter is designed to remove high levels of trash, debris, sediments, nutrients, metals, and hydrocarbons. Its simple design allows for quick and easy installation. The system is housed in a standard precast structure and can be installed at various depths to meet site-specific conditions.

INTRODUCTION
This is the Modular Wetlands Linear Biofilter operation and maintenance manual. Before starting, read the instructions and equipment lists closely. It is important to follow all necessary safety procedures associated with state and local regulations. Some steps required confined space entry. Please contact Contech for more information on pre-authorized third party contractors who can provide installation services in your area. For a list of service providers in your area please visit: www.conteches.com/maintenance.

Pretreatment
Chamber
Biofiltration
Chamber
Discharger
Chamber
Prefilter Box
Biofiltration
Media
Flow
Control
Riser
Vertical
Underdrain
Outflow
Inflow
4 INSTRUCTIONS

INSPECTION SUMMARY
Stormwater regulations require BMPs be inspected and maintained to ensure they are operating as designed to allow for effective pollutant removal and provide protection to receiving water bodies. It is recommended that inspections be performed multiple times during the first year to assess the site specific loading conditions. The first year of inspections can be used to set inspection and maintenance intervals for subsequent years to ensure appropriate maintenance is provided.
• Inspect pre-treatment, biofiltration, and discharge chambers an average of once every six to twelve months. Varies based on site specific and local conditions.
• Average inspection time is approximately 15 minutes. Always ensure appropriate safety protocol and procedures are followed.

The following is a list of equipment required to allow for simple and effective inspection of the Modular Wetlands Linear:
• Modular Wetlands Linear Inspection Form
• Flashlight
• Manhole hook or appropriate tools to remove access hatches and covers • Appropriate traffic control signage and procedures
• Measuring pole and/or tape measure
• Protective clothing and eye protection
• 7/16” open or closed ended wrench
• Large permanent black marker (initial inspections only - first year) Note: entering a confined space requires appropriate safety and certification. It is generally not required for routine inspections of the system

INSPECTION AND MAINTENANCE NOTES

1. Following maintenance and/or inspection, it is recommended that the maintenance operator prepare a maintenance/inspection record. The record should include any maintenance activities performed, amount and description of debris collected, and condition of the system and its various filter mechanisms.

2. The owner should keep maintenance/inspection record(s) for a minimum of five years from the date of maintenance. These records should be made available to the governing municipality for inspection upon request at any time.

3. Transport all debris, trash, organics, and sediments to approved facility for disposal in accordance with local and state requirements.

4. Entry into chambers may require confined space training based on state and local regulations.

5. No fertilizer shall be used in the biofiltration chamber.

6. Irrigation should be provided as recommended by manufacturer and/or landscape architect. Amount of irrigation required is dependent on plant species. Some plants may not require irrigation after initial establishment. 5 INSPECTION PROCESS

1. Prepare the inspection form by writing in the necessary information including project name, location, date & time, unit number and other information (see inspection form).

2. Observe the inside of the system through the access covers. If minimal light is available and vision into the unit is impaired, utilize a flashlight to see inside the system and all of its chambers.

3. Look for any out of the ordinary obstructions in the inflow pipe, pre-treatment chamber, biofiltration chamber, discharge chamber or outflow pipe. Write down any observations on the inspection form.

4. Through observation and/or digital photographs, estimate the amount of trash, debris accumulated in the pre-treatment chamber. Utilizing a tape measure or measuring stick, estimate the amount of sediment in this chamber. Record this depth on the inspection form.

5. Through visual observation, inspect the condition of the pre-filter cartridges. Look for excessive build-up of sediment on the cartridges, any build-up on the tops of the cartridges, or clogging of the holes. Record this information on the inspection form. The prefilter cartridges can be further inspected by removing the cartridge tops and assessing the color of the BioMediaGREEN filter cubes (requires entry into pre-treatment chamber - see notes previous notes regarding confined space entry). Record the color of the material. New material is a light green color. As the media becomes clogged, it will turn darker in color, eventually becoming dark brown or black.

The closer to black the media is the higher percentage that the media is exhausted and is in need of replacement.

6. The biofiltration chamber is generally maintenance-free due to the system’s advanced pre-treatment chamber. For units which have open planters with vegetation, it is recommended that the vegetation be inspected. Look for any plants that are dead or showing signs of disease or other negative stressors. Record the general health of the plants on the inspection form and indicate through visual observation or digital photographs if trimming of the vegetation is required.

7. The discharge chamber houses the orifice control structure, drain down filter (only in California - older models), and is connected to the outflow pipe. It is important to check to ensure the orifice is in proper operating conditions and free of any obstructions. It is also important to assess the condition of the drain down filter media which utilizes a block form of the BioMediaGREEN. Assess in the same manner as the cubes in the prefilter cartridge as mentioned above. Generally, the discharge chamber will be clean and free of debris. Inspect the water marks on the side walls. If possible, inspect the discharge chamber during a rain event to assess the amount of flow leaving the system while it is at 100% capacity (pre-treatment chamber water level at peak HGL - top of bypass weir). The water level of the flowing water should be compared to the watermark level on the side walls, which is an indicator of the highest discharge rate the system achieved when initially installed. Record on the form if there is any difference in level from the watermark in inches.

INSPECTION
• Excessive accumulation of sediment in the pre-treatment chamber of more than 6" in depth.
• Excessive accumulation of sediment on the BioMediaGREEN media housed within the pretreatment cartridges. The following chart shows photos of the condition of the BioMediaGREEN contained within the pre-filter cartridges. When media is more than 85% clogged, replacement is required.
7 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS
New
BioMediaGREEN
0%
Exhausted
BioMediaGREEN
85% 100%
6 MAINTENANCE INDICATORS
Based upon the observations made during inspection,
maintenance of the system may be required based on the
following indicators:
• Missing or damaged internal components or
cartridges
• Obstructions in the system or its inlet and/or outlet pipes
• Excessive accumulation of floatables in the
pretreatment chamber in which the length and
width of the chamber is fully impacted more than
18”. See photo below.
• Excessive accumulation of sediment in the
pretreatment chamber of more than 6” in depth.
• Excessive accumulation of sediment on the
BioMediaGREEN media housed within the
pretreatment cartridges. The following chart shows
photos of the condition of the BioMediaGREEN
contained within the pre-filter cartridges. When
media is more than 85% clogged, replacement is
required.
• Excessive accumulation of sediment on the
BioMediaGREEN media housed within the
pretreatment cartridges. When media is more than
85% clogged, replacement is required. The darker
the BioMediaGREEN, the more clogged it is and in
need of replacement.

MAINTENANCE INDICATORS
Based upon the observations made during inspection, maintenance of the system may b required based on the following indicators:
• Missing or damaged internal components or cartridges
• Obstructions in the system or its inlet and/or outlet pipes • Excessive accumulation of floatables in the pre-treatment chamber in which the leng of the chamber is fully impacted more than 18". See photo below.

INSPECTION
• Excessive accumulation of sediment in the pre-treatment chamber of more than 6" i depth.

INSPECTION

MAINTENANCE INDICATORS
Based upon the observations made during inspection, maintenance of the system may be required based on the following indicators:
• Missing or damaged internal components or cartridges
• Obstructions in the system or its inlet and/or outlet pipes • Excessive accumulation of floatables in the pre-treatment chamber in which the length and width of the chamber is fully impacted more than 18". See photo below.

INSPECTION

MAINTENANCE INDICATORS
Based upon the observations made during inspection
required based on the following indicators:
• Missing or damaged internal components or cartr
• Obstructions in the system or its inlet and/or outle
• Excessive accumulation of floatables in the pre-tr
of the chamber is fully impacted more than 18". S

8. Finalize the inspection report for analysis
determine if maintenance is required.
6 ©2022 COPYRIGHT | CONTECH ENG
NOTE: During the first few storms, the water level in the outflow chamber should be observed and a 6” long horizontal watermark line drawn (using a large permanent marker) at the water level in the discharge chamber while the system is operating at 100% capacity. The diagram below illustrates where the line should be drawn. This line is a reference point for future inspections of the system.

Water level in the discharge chamber is a function of flow rate and pipe size. Observation of the water level during the first few months of operation can be used as a benchmark level for future inspections. The initial mark and all future observations shall be made when the system is at 100% capacity (water level at maximum level in the pre-treatment chamber). If future water levels are below this mark when the system is at 100% capacity, this is an indicator that maintenance to the pre-filter cartridges may be needed.

8. Finalize the inspection report for analysis by the maintenance manager to determine if maintenance is required.
7 INSPECTION PROCESS
• Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. • Overgrown vegetation.
• Water level in the discharge chamber during 100% operating capacity (pretreatment chamber water level at max height) is lower than the water mark by 20%.

The following is a list of equipment to required for maintenance of the Modular Wetlands® Linear:
• Modular Wetlands Linear Maintenance Form
• Manhole hook or appropriate tools to access hatches and covers • Protective clothing, flashlight, and eye protection
• 7/16” open or closed ended wrench
• Vacuum assisted truck with pressure washer
• Replacement BioMediaGREEN for pre-filter cartridges if required (order from one of Contech’s Maintenance Team members at https://www.conteches.com/maintenance).
9 MAINTENANCE | PRETREATMENT CHAMBER

1. Remove access cover over pre-treatment chamber and position vacuum truck accordingly.

2. With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges.

3. Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean.

4. If pre-filter cartridges require media replacement, continue to step 5. If not, replace access cover and move to step 11.
cartridges.

3. Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean.

2. With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges.

3. Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean.

2. With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges.

3. Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean.

5. After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber.

6. Unscrew the two bolts (circles shown below) holding the lid on each cartridge filter and remove lid.

7. Place the vacuum hose over each individual media filter to suck out filter media.

8. Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it’s media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge.

9. Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. Utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. Using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened.

10. Exit the pre-treatment chamber. Replace access hatch or manhole cover.

1. After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber.

2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid.

3. Place the vacuum hose over each individual media filter to suck out filter media.

4. Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it's media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge.
12 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS
0 0

1. After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber.

2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid.

3. Place the vacuum hose over each individual media filter to suck out filter media.

1. After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber.

2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid.

3. Place the vacuum hose over each individual media filter to suck out filter media.

5. MAINTENANCE (PRE-FILTER CARTRIDGES)
Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened.

6. Exit the pre-treatment chamber. Replace access hatch or manhole cover.

6. Exit the pre-treatment chamber. Replace access hatch or manhole cover. 11 MAINTENANCE | BIOFILTRATION CHAMBER

11. In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. The Modular Wetlands Linear utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones.

12. Each vertical under drain on the biofiltration chamber has a removable (threaded cap) that can be taken off to check any blockages or root growth. Once removed, a jetting attachment can be used to clean out the under drain and orifice riser.

13. As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous). The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or replaced with guidance by the manufacturer.

14. Contact one of Contech’s Maintenance Team members at https://www.conteches.com/maintenance to order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is recommended to position the super sack over the biofiltration chamber. Fill the media cages up to the same level as the old media. Replant with vegetation. ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS

3. As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous).

The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or replaced with guidance by the manufacturer.

4. The first step is to contact the manufacturer and order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is rec-ommended to position the super sack over the biofiltration chamber.

Fill the media cages up to the same level as the old media. Replant with vegetation.

2. Each vertical under drain on the biofiltration chamber has a removable (threaded) that can be taken off to check any blockages or root growth. Once removed a a jetting attachment can be used to clean out the under drain and orifice riser. ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS
all biofilter systems, at some point the biofiltration media (WetlandMedia) ed to be replaced. Either because of physical clogging of sorptive exhaustion media ion exchange capacity (to remove dissolved metals and phosphorous). neral life of this media is 10 to 20 years based on site specific conditions and nt loading. Utilize the vacuum truck to vacuum out the media by placing the to the chamber. Once all the media is removed use the
washer to spray down all the netting on the outer metal cage. Inspect the for any damage or holes. If the netting is damaged it can be repaired or re with guidance by the manufacturer.
st step is to contact the manufacturer and order new WetlandMedia. The y of media needed can be determined by providing the model number and pth. Media will be provided in super sacks for easy installation. Each sack gh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or s rec-ommended to position the super sack over the biofiltration chamber. media cages up to the same level as the old media. Replant with vegetation. vertical under drain on the biofiltration chamber has a removable (threaded) an be taken off to check any blockages or root growth. Once removed a g attachment can be used to clean out the under drain and 1 orifice riser. .

MAINTENANCE (BIOFILTRATION CHAMBER)
In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. Using standard gardening tools, properly trim back the vegetation to healthy levels. The MW Linear™ utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones.

Fill the media cages up to the same level as the old media. Replant with vegetation.

15. Remove access hatch or manhole cover over discharge chamber.

16. Enter chamber to gain access to the drain down filter. Unlock the locking mechanism and lift up drain down filter housing to remove used BioMediaGREEN filter block as shown below. NOTE: Drain down filter is only found on units installed in California prior to 2023. If no drain down filter is present, skip steps 16 and 17.

17. Insert a new BioMediaGREEN filter block and lock drain down filter housing back in place.

18. Replace access hatch or manhole cover over discharge chamber.

INSPECTION
• Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required.
• Overgrown vegetation.
• Water level in the discharge chamber during 100% operating capacity (pre-treatment chamber water level at max height) is lower than the watermark by 20%. 13 NOTES
_______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ 14 For Office Use Only
(city) (Zip Code) (Reviewed By)
Owner / Management Company
(Date)
Contact Phone ( ) _
Inspector Name Date / / Time AM / PM
Weather Condition Additional Notes
Yes
Depth:

Yes No
Modular Wetland System Type (Curb, Grate or UG Vault): Size (22', 14' or etc.):

Other Inspection Items:

Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes Office personnel to complete section to
the left.

Inspection Report
Modular Wetlands Linear
Is the filter insert (if applicable) at capacity and/or is there an accumulation of debris/trash on the shelf system? Does the cartridge filter media need replacement in pre-treatment chamber and/or discharge chamber? Any signs of improper functioning in the discharge chamber? Note issues in comments section.

Chamber:

Is the inlet/outlet pipe or drain down pipe damaged or otherwise not functioning properly? Structural Integrity:

Working Condition:

Is there evidence of illicit discharge or excessive oil, grease, or other automobile fluids entering and clogging the unit?
Is there standing water in inappropriate areas after a dry period? Damage to pre-treatment access cover (manhole cover/grate) or cannot be opened using normal lifting pressure?
Damage to discharge chamber access cover (manhole cover/grate) or cannot be opened using normal lifting pressure?
Does the MWS unit show signs of structural deterioration (cracks in the wall, damage to frame)? Project Name
Project Address
Inspection Checklist
No Comments
Does the depth of sediment/trash/debris suggest a blockage of the inflow pipe, bypass or cartridge filter? If yes, specify which one in the comments section. Note depth of accumulation in in pre-treatment chamber.

Is there a septic or foul odor coming from inside the system? Is there an accumulation of sediment/trash/debris in the wetland media (if applicable)? Is it evident that the plants are alive and healthy (if applicable)? Please note Plant Information below.

Sediment / Silt / Clay
Trash / Bags / Bottles
Green Waste / Leaves / Foliage
Waste: Plant Information
No Cleaning Needed
Recommended Maintenance
Additional Notes:

Damage to Plants
Plant Replacement
Plant Trimming
Schedule Maintenance as Planned
Needs Immediate Maintenance

ENGINEERED SOLUTIONS
15 For Office Use Only
(city) (Zip Code) (Reviewed By)
Owner / Management Company
(Date)
Contact Phone ( ) _
Inspector Name Date / / Time AM / PM
Weather Condition Additional Notes
Site
Map #
Comments:

Inlet and Outlet
Pipe Condition
Drain Down Pipe
Condition
Discharge Chamber
Condition
Drain Down Media
Condition
Plant Condition
Media Filter
Condition
Long:

MWS
Sedimentation
Basin
Total Debris
Accumulation
Condition of Media
25/50/75/100
(will be changed
@ 75%)
Operational Per
Manufactures'
Specifications
(If not, why?)
Lat: MWS
Catch Basins
GPS Coordinates
of Insert
Manufacturer /
Description / Sizing
Trash
Accumulation
Foliage
Accumulation
Sediment
Accumulation
Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes Office personnel to complete section to
the left.

Project Address
Project Name
Cleaning and Maintenance Report
Modular Wetlands Linear ENGINEERED SOLUTIONS

Modular Wetlands Maintenance Guide 1/2023
NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS

SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS

ENGINEERED SOLUTIONS
SC-43 Parking/Storage Area Maintenance
2 of 4 California Stormwater BMP Handbook January 2003
Municipal
www.cabmphandbooks.com
Arrange rooftop drains to prevent drainage directly onto paved surfaces. Design lot to include semi-permeable hardscape.

Controlling Litter
Post “No Littering” signs and enforce anti-litter laws. Provide an adequate number of litter receptacles.
Clean out and cover litter receptacles frequently to prevent spillage. Provide trash receptacles in parking lots to discourage litter. Routinely sweep, shovel and dispose of litter in the trash.

Surface cleaning
Use dry cleaning methods (e.g. sweeping or vacuuming) to prevent the discharge of pollutants into the stormwater conveyance system.
Establish frequency of public parking lot sweeping based on usage and field observations of waste accumulation.
Sweep all parking lots at least once before the onset of the wet season. If water is used follow the procedures below:
- Block the storm drain or contain runoff.
- Wash water should be collected and pumped to the sanitary sewer or discharged to a pervious surface, do not allow wash water to enter storm drains. - Dispose of parking lot sweeping debris and dirt at a landfill. When cleaning heavy oily deposits:
- Use absorbent materials on oily spots prior to sweeping or washing. - Dispose of used absorbents appropriately.

Surface Repair
Pre-heat, transfer or load hot bituminous material away from storm drain inlets. Apply concrete, asphalt, and seal coat during dry weather to prevent contamination form contacting stormwater runoff.
Cover and seal nearby storm drain inlets (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc., where applicable. Leave covers in place until job is complete and until all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal.

Parking/Storage Area Maintenance SC-43
January 2003 California Stormwater BMP Handbook 3 of 4
Municipal
www.cabmphandbooks.com
Use only as much water as necessary for dust control, to avoid runoff. Catch drips from paving equipment that is not in use with pans or absorbent material placed under the machines. Dispose of collected material and absorbents properly.

Inspection
Have designated personnel conduct inspections of the parking facilities and stormwater conveyance systems associated with them on a regular basis. Inspect cleaning equipment/sweepers for leaks on a regular basis.

Training
Provide regular training to field employees and/or contractors regarding cleaning of paved areas and proper operation of equipment.
Train employees and contractors in proper techniques for spill containment and cleanup.

Spill Response and Prevention
Refer to SC-11, Spill Prevention, Control & Cleanup.
Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, nad implement accordingly.
Have spill cleanup materials readily available and in a known location. Cleanup spills immediately and use dry methods if possible. Properly dispose of spill cleanup material.

Other Considerations
Limitations related to sweeping activities at large parking facilities may include high equipment costs, the need for sweeper operator training, and the inability of current sweeper technology to remove oil and grease.

Requirements
Costs
Cleaning/sweeping costs can be quite large, construction and maintenance of stormwater structural controls can be quite expensive as well.

Maintenance
Sweep parking lot to minimize cleaning with water.
Clean out oil/water/sand separators regularly, especially after heavy storms. Clean parking facilities on a regular basis to prevent accumulated wastes and pollutants from being discharged into conveyance systems during rainy conditions.

SC-43 Parking/Storage Area Maintenance
4 of 4 California Stormwater BMP Handbook January 2003
Municipal
www.cabmphandbooks.com
Supplemental Information
Further Detail of the BMP
Surface Repair
Apply concrete, asphalt, and seal coat during dry weather to prevent contamination form contacting stormwater runoff. Where applicable, cover and seal nearby storm drain inlets (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc. Leave covers in place until job is complete and until all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal.

Use only as much water as necessary for dust control, to avoid runoff.

References and Resources
http://www.stormwatercenter.net/
California’s Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html Model Urban Runoff Program: A How-To Guide for Developing Urban Runoff Programs for Small Municipalities. Prepared by City of Monterey, City of Santa Cruz, California Coastal Commission, Monterey Bay National Marine Sanctuary, Association of Monterey Bay Area Governments, Woodward-Clyde, Central Coast Regional Water Quality control Board. July 1998 (Revised February 2002 by the California Coastal Commission).

Orange County Stormwater Program
http://www.ocwatersheds.com/StormWater/swp_introduction.asp Oregon Association of Clean Water Agencies. Oregon Municipal Stormwater Toolbox for Maintenance Practices. June 1998.

Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA) http://www.basma.org
San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP)
http://www.projectcleanwater.org/pdf/Model%20Program%20Municipal%20Facilities.pdf Site Design & Landscape Planning SD-10
January 2003 California Stormwater BMP Handbook 1 of 4
New Development and Redevelopment
www.cabmphandbooks.com
Description
Each project site possesses unique topographic, hydrologic, and vegetative features, some of which are more suitable for development than others. Integrating and incorporating appropriate landscape planning methodologies into the project design is the most effective action that can be done to minimize surface and groundwater contamination from stormwater.

Approach
Landscape planning should couple consideration of land suitability for urban uses with consideration of community goals and projected growth. Project plan designs should conserve natural areas to the extent possible, maximize natural water storage and infiltration opportunities, and protect slopes and channels.

Suitable Applications
Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment.

Design Considerations
Design requirements for site design and landscapes planning should conform to applicable standards and specifications of agencies with jurisdiction and be consistent with applicable General Plan and Local Area Plan policies.

Design Objectives
; Maximize Infiltration
; Provide Retention
; Slow Runoff
; Minimize Impervious Land
Coverage
Prohibit Dumping of Improper
Materials
Contain Pollutants
Collect and Convey
SD-10 Site Design & Landscape Planning
2 of 4 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www.cabmphandbooks.com
Designing New Installations
Begin the development of a plan for the landscape unit with attention to the following general principles:
Formulate the plan on the basis of clearly articulated community goals. Carefully identify conflicts and choices between retaining and protecting desired resources and community growth.
Map and assess land suitability for urban uses. Include the following landscape features in the assessment: wooded land, open unwooded land, steep slopes, erosion-prone soils, foundation suitability, soil suitability for waste disposal, aquifers, aquifer recharge areas, wetlands, floodplains, surface waters, agricultural lands, and various categories of urban land use. When appropriate, the assessment can highlight outstanding local or regional resources that the community determines should be protected (e.g., a scenic area, recreational area, threatened species habitat, farmland, fish run). Mapping and assessment should recognize not only these resources but also additional areas needed for their sustenance.

Project plan designs should conserve natural areas to the extent possible, maximize natural water storage and infiltration opportunities, and protect slopes and channels.

Conserve Natural Areas during Landscape Planning
If applicable, the following items are required and must be implemented in the site layout during the subdivision design and approval process, consistent with applicable General Plan and Local Area Plan policies:
Cluster development on least-sensitive portions of a site while leaving the remaining land in a natural undisturbed condition.
Limit clearing and grading of native vegetation at a site to the minimum amount needed to build lots, allow access, and provide fire protection.
Maximize trees and other vegetation at each site by planting additional vegetation, clustering tree areas, and promoting the use of native and/or drought tolerant plants. Promote natural vegetation by using parking lot islands and other landscaped areas. Preserve riparian areas and wetlands.

Maximize Natural Water Storage and Infiltration Opportunities Within the Landscape Unit Promote the conservation of forest cover. Building on land that is already deforested affects basin hydrology to a lesser extent than converting forested land. Loss of forest cover reduces interception storage, detention in the organic forest floor layer, and water losses by evapotranspiration, resulting in large peak runoff increases and either their negative effects or the expense of countering them with structural solutions. Maintain natural storage reservoirs and drainage corridors, including depressions, areas of permeable soils, swales, and intermittent streams. Develop and implement policies and Site Design & Landscape Planning SD-10
January 2003 California Stormwater BMP Handbook 3 of 4
New Development and Redevelopment
www.cabmphandbooks.com
regulations to discourage the clearing, filling, and channelization of these features. Utilize them in drainage networks in preference to pipes, culverts, and engineered ditches. Evaluating infiltration opportunities by referring to the stormwater management manual for the jurisdiction and pay particular attention to the selection criteria for avoiding groundwater contamination, poor soils, and hydrogeological conditions that cause these facilities to fail. If necessary, locate developments with large amounts of impervious surfaces or a potential to produce relatively contaminated runoff away from groundwater recharge areas.

Protection of Slopes and Channels during Landscape Design Convey runoff safely from the tops of slopes.
Avoid disturbing steep or unstable slopes.
Avoid disturbing natural channels.
Stabilize disturbed slopes as quickly as possible.
Vegetate slopes with native or drought tolerant vegetation. Control and treat flows in landscaping and/or other controls prior to reaching existing natural drainage systems.
Stabilize temporary and permanent channel crossings as quickly as possible, and ensure that increases in run-off velocity and frequency caused by the project do not erode the channel. Install energy dissipaters, such as riprap, at the outlets of new storm drains, culverts, conduits, or channels that enter unlined channels in accordance with applicable specifications to minimize erosion. Energy dissipaters shall be installed in such a way as to minimize impacts to receiving waters.
Line on-site conveyance channels where appropriate, to reduce erosion caused by increased flow velocity due to increases in tributary impervious area. The first choice for linings should be grass or some other vegetative surface, since these materials not only reduce runoff velocities, but also provide water quality benefits from filtration and infiltration. If velocities in the channel are high enough to erode grass or other vegetative linings, riprap, concrete, soil cement, or geo-grid stabilization are other alternatives. Consider other design principles that are comparable and equally effective.

Redeveloping Existing Installations
Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define “redevelopment” in terms of amounts of additional impervious area, increases in gross floor area and/or exterior construction, and land disturbing activities with structural or impervious surfaces. The definition of “ redevelopment” must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under “designing new installations” above should be followed.

Efficient Irrigation SD-12
January 2003 California Stormwater BMP Handbook 1 of 2
New Development and Redevelopment
www.cabmphandbooks.com
Description
Irrigation water provided to landscaped areas may result in excess irrigation water being conveyed into stormwater drainage systems.

Approach
Project plan designs for development and redevelopment should include application methods of irrigation water that minimize runoff of excess irrigation water into the stormwater conveyance system.

Suitable Applications
Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment. (Detached residential single-family homes are typically excluded from this requirement.)
Design Considerations
Designing New Installations
The following methods to reduce excessive irrigation runoff should be considered, and incorporated and implemented where determined applicable and feasible by the Permittee:
Employ rain-triggered shutoff devices to prevent irrigation after precipitation. Design irrigation systems to each landscape area’s specific water requirements. Include design featuring flow reducers or shutoff valves triggered by a pressure drop to control water loss in the event of broken sprinkler heads or lines.
Implement landscape plans consistent with County or City water conservation resolutions, which may include provision of water sensors, programmable irrigation times (for short cycles), etc.

Design Objectives
; Maximize Infiltration
; Provide Retention
; Slow Runoff
Minimize Impervious Land
Coverage
Prohibit Dumping of Improper
Materials
Contain Pollutants
Collect and Convey
SD-12 Efficient Irrigation
2 of 2 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www.cabmphandbooks.com
Design timing and application methods of irrigation water to minimize the runoff of excess irrigation water into the storm water drainage system.
Group plants with similar water requirements in order to reduce excess irrigation runoff and promote surface filtration. Choose plants with low irrigation requirements (for example, native or drought tolerant species). Consider design features such as:
- Using mulches (such as wood chips or bar) in planter areas without ground cover to minimize sediment in runoff
- Installing appropriate plant materials for the location, in accordance with amount of sunlight and climate, and use native plant materials where possible and/or as recommended by the landscape architect
- Leaving a vegetative barrier along the property boundary and interior watercourses, to act as a pollutant filter, where appropriate and feasible - Choosing plants that minimize or eliminate the use of fertilizer or pesticides to sustain growth
Employ other comparable, equally effective methods to reduce irrigation water runoff.

Other Resources
A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County Department of Public Works, May 2002.

Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002.

Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange County, Draft February 2003.

Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures, July 2002.

You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com)

The primary purpose of storm drains is to carry rain water away from developed areas to prevent flooding. Pollutants discharged to storm drains are transported directly into rivers, lakes and streams. Soaps, degreasers, automotive fluids, litter and a host of materials are washed off buildings, sidewalks, plazas and parking areas. Vehicles and equipment must be properly managed to prevent the pollution of local waterways.

Unintentional spills by mobile service operators
can flow into storm drains and pollute our
waterways. Avoid mishaps. Always have a Spill Response Kit on hand to clean up unintentional spills. Only emergency Mechanical repairs should be done in City streets and use drip pans for spills. Plumbing should be done on private property. Always store chemicals in a leak-proof container and keep covered when not in use. Window/Power Washing waste water shouldn’t be released into the streets, but should be disposed of in a sanitary sewer, landscaped area or in the soil. Soiled Carpet Cleaning wash water should be filtered before being discharged into the sanitary sewer. Dispose of all filter debris properly. Car Washing/Detailing operators should wash cars on private property and use a regulated hose nozzle for water flow control and runoff prevention. Capture and dispose of waste water and chemicals properly. Always prevent runoff water from entering storm drains.

StormWater Pollution
Car Washing / Mobile Detailers
Window and Carpet Cleaners
Power Washers
Waterproofers / Street Sweepers
Equipment cleaners or degreasers and
all mobile service providers
Storm drain pollution prevention
information for:

What you should know for...

WATER AGENCY LIST
in Riverside County
City of Banning (951) 922-3130
City of Beaumont (951) 769-8520
City of Blythe (760) 922-6161
City of Coachella (760) 398-3502
Coachella Valley Water District (760) 398-2651
City of Corona (951) 736-2259
Desert Center, CSA #51 (760) 227-3203
Eastern Municipal Water District (951) 928-3777
Elsinore Valley MWD (951) 674-3146
Farm Mutual Water Company (951) 244-4198
City of Hemet (951) 765-3712
Idyllwild Water District (951) 659-2143
Jurupa Community Services District (951) 360-8795
Lake Hemet MWD (951) 658-3241
Lee Lake Water District (951) 277-1414
March Air Force Base (951) 656-7000
Mission Springs Water District (760) 329-6448
City of Palm Springs (760) 323-8253
Rancho Caballero (951) 780-9272
Rancho California Water District (951) 296-6900
Ripley, CSA #62 (760) 922-4951
City of Riverside (951) 351-6170
Rubidoux Services District (951) 684-7580
Silent Valley Club, Inc (951) 849-4501
Valley Sanitary District (760) 347-2356
Western Municipal Water District (951) 789-5000
Yucaipa Valley Water District (909) 797-5117

REPORT ILLEGAL STORM DRAIN DISPOSAL
or online at
Online resources include:

Riverside County Flood Control and Water
Conservation District
California Storm Water Quality Association
State Water Resources Control Board
Power Washers of North America
1-800-506-2555
www.rcflood.org
•
www.rcflood.org
•
www.casqa.org
•
www.swrcb.ca.gov/
•
www.thepwna.org
Helpful telephone numbers and links: DDoo yyoouu kknnooww wwhheerree ssttrreeeettfflloowwss aaccttuuaallllyy ggoo??

OUTDOOR CLEANING

ACTIVITIES AND

PROFESSIONAL MOBILE

SERVICE PROVIDERS

ONLY RAIN IN THE DRAIN
Storm Drains are NOT connected to sanitary sewer systems and treatment plants!

REPORT ILLEGAL

STORM DRAIN

DISPOSAL
1-800-506-2555
Help Protect Our Waterways!
Use These Guidelines For Outdoor Cleaning Activities and Wash Water Disposal Did you know that disposing of pollutants
into the street, gutter, storm drain or
nearest body of water is PROHIBITED by
law and can bring about stiff penalties.

Waste wash water from Mechanics,
Plumbers, Window/Power Washers, Carpet
Cleaners, Car Washing and Mobile Detailing
activities may contain significant quantities
of motor oil, grease, chemicals, dirt,
detergents, brake pad dust, litter and other
materials.

Best Management Practices, or BMPs as
they are known, are guides to prevent
pollutants from entering the storm drains.

Each of us can do our part to keep storm
water clean by using the suggested BMPs
below:
consider dry cleaning methods first
such as a mop, broom, rag or wire brush.

Always keep a spill response kit on site.
prepare the work area before power
cleaning by using sand bags, rubber mats,
vacuum booms, containment pads or
temporary berms to keep wash water away
from the gutters and storm drains.

use vacuums or other machines to
remove and collect loose debris or litter
before applying water.

Best Management Practices
Simple solutions for both light
and heavy duty jobs:

Do...

Do not let...

Report illegal storm drain disposal,
Call Toll Free
1-800-506-2555
obtain the property owner's
permission to dispose small amounts of
power washing waste water to
landscaped, gravel or unpaved surfaces.
check with your local sanitary sewer
agency's policies on wash water disposal
regulations. (See list on reverse side).
be aware that if discharging to
landscape areas, soapy wash water may
damage landscaping. Residual wash water
may remain on paved surfaces to
evaporate. Sweep up solid residuals and
dispose of properly. Vacuum booms are
another option for capturing and collecting
wash water.
wash or waste water from
sidewalk, plaza or building cleaning go into
a street or storm drain.

Using Cleaning Agents
Think Water Conservation
Try using biodegradable/phosphate-free
products. They are easier on the
environment, but don't confuse them for
being toxic free. Soapy water entering the
storm drain system can impact the delicate
aquatic environment.

When cleaning surfaces with a high-pressure
washer or steam cleaner, additional
precautions should be taken to prevent the
discharge of pollutants into the storm drain
system. These two methods of surface
cleaning can loosen additional material that
can contaminate local waterways.

Minimize water use by using high pressure,
low volume nozzles. Be sure to check all
hoses for leaks.

Screening Wash Water
Drain Inlet Protection & Collection
of Wash Water
•
•
•
•
Equipment and Supplies
•
•
•
•
•
A thorough dry cleanup before washing
exterior surfaces, such as buildings and
decks without loose paint, sidewalks, or plaza
areas should be sufficient to protect receiving
waters. Keep debris from entering the storm
drain after cleaning by first passing the wash
water first through a “20 mesh” or finer
screen to catch the solid materials, then
disposing the mesh in a refuse container.

Prior to any washing, block all storm
drains with an impervious barrier such as
sandbags or berms, or seal the storm
drain with plugs or rubber mats.

Create a containment area with berms
and traps or take advantage of a low spot
to keep wash water contained.

Wash vehicles and equipment on grassy
or gravel areas so that the wash water
can seep into the ground.

Pump or vacuum up all wash water in the
contained area.

For special materials, equipment and
supplies:

New Pig — (800) 468-4647
Lab Safety Supply — (800) 356-0783
C&H — (800) 558-90966
W.W. Grainger — (800) 994-9174
Cleaning Equipment Trade Association
— (800) 441-0111

NLY RAIN
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DO
IN
W
A
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T
D
HE
RM
STO
What is stormwater runoff?
Why is stormwater runoff a problem?
The effects of pollution
Stormwater runoff occurs when precipitation
from rain or snowmelt flows over the ground.

Impervious surfaces like driveways, sidewalks,
and streets prevent stormwater from
naturally soaking into the ground.

Stormwater can pick up debris, chemicals, dirt, and other pollutants and flow into a storm sewer system or directly to a lake, stream, river, wetland, or coastal water. Anything that enters a storm sewer system is discharged untreated into the waterbodies we use for swimming, fishing, and providing drinking water.

Polluted stormwater runoff can have
many adverse effects on plants, fish,
animals, and people.

Sediment can cloud the water
and make it difficult or
impossible for aquatic plants to
grow. Sediment also can
.

destroy aquatic habitats
Excess nutrients can cause
algae blooms. When algae die,
they sink to the bottom and decompose
in a process that removes oxygen from
the water. Fish and other aquatic
organisms can’t exist in water with low
dissolved oxygen levels.

Bacteria and other pathogens can wash
into swimming areas and create health
hazards, often making beach closures
necessary.

Debris—plastic bags, six-pack rings, bottles, and
cigarette butts—washed into waterbodies can choke, suffocate, or disable aquatic life like ducks, fish, turtles, and birds.

Household hazardous wastes like insecticides, pesticides, paint, solvents, used motor oil, and other auto fluids can poison aquatic life.

Land animals and people can become sick or die from eating diseased fish and shellfish or ingesting polluted water.

Polluted stormwater often
affects drinking water
sources. This, in turn, can
affect human health and
increase drinking water
treatment costs.

After the Storm
EPA 833-B-03-002
January 2003
For more information contact:
or visit
www.epa.gov/npdes/stormwater
www.epa.gov/nps
A Citizen’s Guide to
Understanding Stormwater

WHEN IT RAINS

IT DRAINS

WHEN IT RAINS
IT DRAINS Internet Address (URL) HTTP://www.epa.gov
Recycled/Recyclable Printed With Vegetable
Oil Based Inks on 100% Postconsumer,
Process Chlorine Free Recycled Paper
●
●
Auto care
Washing your car and
degreasing auto parts at home
can send detergents and other
contaminants through the
storm sewer system. Dumping
automotive fluids into storm
drains has the same result as
dumping the materials directly
into a waterbody.

Pet waste
Pet waste can be
a major source of
bacteria and
excess nutrients
in local waters.
When walking
your pet,
remember to pick up the
waste and dispose of it
properly. Flushing pet
waste is the best disposal
method. Leaving pet waste
on the ground increases
public health risks by
allowing harmful bacteria
and nutrients to wash into
the storm drain and
eventually into local
waterbodies.

Septic
systems
Leaking and
poorly
maintained
septic
systems release nutrients and
pathogens (bacteria and
viruses) that can be picked up
by stormwater and discharged
into nearby waterbodies.

Pathogens can cause public
health problems and
environmental concerns.

Lawn care
Excess fertilizers
and pesticides
applied to lawns
and gardens wash
off and pollute
streams. In
addition, yard
clippings and
leaves can wash
into storm drains and contribute
nutrients and organic matter to streams.

Education is essential to changing people's behavior.

Signs and markers near storm drains warn residents
that pollutants entering the drains will be carried
untreated into a local waterbody. Recycle or properly dispose of household products that contain chemicals, such as insecticides, pesticides, paint, solvents, and used motor oil and other auto fluids.

Don’t pour them onto the ground or into storm drains.

Use a commercial car wash that treats or
recycles its wastewater, or wash your car on
your yard so the water infiltrates into the
ground.

Repair leaks and dispose of used auto fluids
and batteries at designated drop-off or
recycling locations.

Don’t overwater your lawn. Consider
using a soaker hose instead of a
sprinkler.

Use pesticides and fertilizers
sparingly. When use is necessary, use
these chemicals in the recommended
amounts. Use organic mulch or safer
pest control methods whenever
possible.

Compost or mulch yard waste. Don’t
leave it in the street or sweep it into
storm drains or streams.

Cover piles of dirt or mulch being
used in landscaping projects.

Inspect your system every
3 years and pump your
tank as necessary (every 3
to 5 years).

Don't dispose of
household hazardous
waste in sinks or toilets.

Dirt, oil, and debris that collect in
parking lots and paved areas can be
washed into the storm sewer system
and eventually enter local
waterbodies.

Sweep up litter and debris from
sidewalks, driveways and parking lots,
especially around storm drains.

Cover grease storage and dumpsters
and keep them clean to avoid leaks.

Report any chemical spill to the local
hazardous waste cleanup team.

They’ll know the best way to keep
spills from harming the environment.

Erosion controls that aren’t maintained can cause
excessive amounts of sediment and debris to be
carried into the stormwater system. Construction
vehicles can leak fuel, oil, and other harmful fluids
that can be picked up by stormwater and
deposited into local waterbodies.

Divert stormwater away from disturbed or
exposed areas of the construction site.

Install silt fences, vehicle mud removal areas,
vegetative cover, and other sediment and
erosion controls and properly maintain them,
especially after rainstorms.

Prevent soil erosion by minimizing disturbed
areas during construction projects, and seed
and mulch bare areas as soon as possible.

Uncovered fueling stations allow spills to be
washed into storm drains. Cars waiting to be
repaired can leak fuel, oil, and other harmful
fluids that can be picked up by stormwater.

Clean up spills immediately and properly
dispose of cleanup materials.

Provide cover over fueling stations and
design or retrofit facilities for spill
containment.

Properly maintain fleet vehicles to prevent
oil, gas, and other discharges from being
washed into local waterbodies.

Install and maintain oil/water separators.

Lack of vegetation on streambanks can lead to erosion. Overgrazed pastures can also contribute excessive amounts of sediment to local waterbodies. Excess fertilizers and pesticides can poison aquatic animals and lead to destructive algae blooms. Livestock in streams can contaminate waterways with bacteria, making them unsafe for human contact.

Keep livestock away from streambanks and provide
them a water source away from waterbodies.

Store and apply manure away from waterbodies and in
accordance with a nutrient management plan.

Vegetate riparian areas along waterways.

Rotate animal grazing to prevent soil erosion in fields.

Apply fertilizers and pesticides according to label
instructions to save money and minimize pollution.

Permeable Pavement
Rain Barrels
Rain Gardens and
Grassy Swales
Vegetated Filter Strips
—Traditional concrete and
asphalt don’t allow water to soak into the ground.

Instead these surfaces rely on storm drains to
divert unwanted water. Permeable pavement
systems allow rain and snowmelt to soak through,
decreasing stormwater runoff.
—You can
collect rainwater from
rooftops in mosquitoproof containers. The
water can be used later on
lawn or garden areas.
—Specially
designed areas planted
with native plants can provide natural places for
rainwater to collect
and soak into the
ground. Rain from
rooftop areas or paved
areas can be diverted
into these areas rather
than into storm drains.
—Filter strips are areas of
native grass or plants created along roadways or
streams. They trap the pollutants stormwater
picks up as it flows across driveways and streets.

Residential landscaping
Improperly managed logging operations can result in erosion and sedimentation.

Conduct preharvest planning to prevent erosion and lower costs.

Use logging methods and equipment that minimize soil disturbance.

Plan and design skid trails, yard areas, and truck access roads to minimize stream crossings and avoid disturbing the forest floor.

Construct stream crossings so that they minimize erosion and physical changes to streams.

Expedite revegetation of cleared areas.

Commercial
Stormwater Pollution Solutions
Construction
Agriculture Automotive
Facilities
Forestry

Your community preserves habitat for important native plants and animals. By habitat, we mean homes; food, water, and places with space to live. The habitat is managed as part of a biological conservation easement, a legal agreement that permanently limits its use.

Many conservation easements include a waterway or wetland because plants and animals need clean, fresh water, the most limited resource in our dry Southern California climate. A waterway (also called watercourse, arroyo, wash) conveys a flowing creek, stream, or river, which provides drinking water for local and migrating wildlife.

Not all of our waterways have visible flowing water year-round. Some creeks and streams continue to flow underground, while others flow for a short time after a storm (ephemeral). The small, and often dry washes are important to wildlife because they provide habitat and their periodic flows drain into larger waterways. It's essential that people do not degrade the quality of any water that reaches local waterways.

Water supports an abundance of vegetation and a variety of life, or biodiversity.

Streamside vegetation, along dry or flowing waterways, is referred to as riparian.

Native riparian plants provide native animals with suitable food, shelter, nesting sites and escape-cover from predators.

The purpose of this publication is to
help homeowners become habitatfriendly neighbors for nearby habitat lands. The Resources Directory,
inserted inside this booklet, provides
helpful websites and contact
information for agencies,
organizations, gardens, and native
plant nurseries.

Unfortunately, our modern-day
lifestyles have negative impacts on
the environment around us. Human
activity in, or near waterways can damage the capacity of the habitat to support some kinds of plant and animal life, especially species that do not adapt to urban/suburban conditions. Here are some ways to prevent and reduce negative impacts and help restore habitat to healthy conditions.

Gerald & Buff Crosi, California Academy of Sciences
Help Your Wild Next-Door Neighbors
Living on the Edge
Reduce Impacts on Native Wildlife
Prevent light, noise, and
activity in, and adjacent to
wetlands.

CalTIP,
! If you wish to observe wildlife,
please watch from afar,
especially during the breeding
and nesting season, from
March to September. Most
wild animals are naturally
fearful of human contact.

Human activity near a nest or
den may frighten adult
animals away from young and
jeopardize their survival.
! When visiting natural areas,
disturb as little as possible. Avoid walking or riding in a stream course or on channel banks. Heavy foot traffic, horses, and off-road vehicles may cause channel banks to collapse, accelerating erosion and increasing water-born sediment and turbidity. ! Help control entry into habitat areas. Close unessential roadways to prevent access for illegal dumping, trespass, and off-road vehicle use.
! Leave nothing behind.
! Focus necessary lighting downward and inward toward your home, yard, and buildings. ! To report poaching or polluting call Californians Turn In Poachers and Polluters, a confidential secret witness program. The toll free telephone number operates 24 hours a day, 7 days a week. (See the Resources Directory insert for contact information.) Do not allow pets to roam in habitat land
where they will disturb and hunt native
wildlife. Keep pets on a leash and
droppings out of waterways. Cats and dogs
stress or kill wildlife and prevent natural
ecosystems from supporting their own
predators, such as hawks, coyotes, foxes,
and bobcats. Conversely, domesticated
animals face hazards in wild areas. Pets
may be attacked by predators, such as
coyotes and rattlesnakes, or may contract
disease, fleas, and ticks.

Do not release unwanted animals into
the wild. Abandoned cats, dogs, birds,
reptiles and fish can have significant
impacts on populations of native species,
either through disease, predation or
competition for food and space.

USDA Natural Resources Conservation Service
Diana Ruiz
Respect and protect wild animals by keeping them wild. In some instances, being a good neighbor means protecting your living area by excluding certain kinds of wildlife, mainly mammals. The human habitat includes home sites, buildings, yards, gardens, and regularly used outdoor areas. Install fencing around the human habitat portion of your property and secure enclosures to protect children, pets, and farm animals.
! Do not take small animals, such as tortoises, tadpoles, frogs, snakes, birds, lizards or eggs from the wild. Never attempt to “adopt” or domesticate a wild animal. ! Discourage dangerous predators from penetrating human habitat areas. Install fencing that will exclude predators. Place sensors that trigger sprinklers and lights to deter predators and mammals from entering areas of human activity. ! Prevent mammals from living in and near
your home by closing entries, filling holes,
and removing brush, junk, and woodpiles
near buildings.
! Don’t feed human food to wildlife. Do not
leave pet food outside. Prevent garbage from
becoming a food source for wild mammals by
sealing trash can lids. If you compost, use
closed-containers or turn piles regularly.

Compost plant material only; meat scraps
should not be mixed in a compost pile.

Brown-headed Cowbird
Lee Karney/ U.S. Fish and Wildlife Service
R. H. Barrett/ U. S. Fish and Wildlife Service
The endangered Least Bell’s Vireo is
threatened by the Brown-headed Cowbird.

Mark A. Chappell
! Exotic invaders crowd out native species both on land and in water. Do not place fish, frogs, crayfish, turtles, or aquatic plants into
creeks, streams or
lakes. Some nonnative species are not
only able to survive,
but also reproduce
explosively due to a
lack of natural
predators. For
example, the brown-headed cowbird is overwhelming
riparian habitats. The cowbird lays its eggs in another bird’s nest to the detriment of the host’s young.
! Pets are usually unable to survive in wildlands. They starve to death or are eaten. If you cannot find a
home for a pet, contact animal control, your local
animal shelter, or the Humane Society.

For more information, contact the California Department of Fish and Game. (See the Resources Directory insert for contact information.) Diana Ruiz
Reduce Impacts on Native Plants
Remove invasive, non-native plants from
home landscaping and adjacent habitat lands,
especially those that quickly spread through
waterways, displacing important native species.

DO NOT PLANT
Giant reed
Salt Cedar
Tree of Heaven
Red apple, heartleaf iceplant
Fountain grass (yellow)
Castor bean
Periwinkle
Peruvian (Calif.) pepper tree
Brazilian pepper tree
Mexican fan palm
Sweet fennel
Pampas grass/Jubata grass
Common iceplant
Myoporum species
Arundo donax
Tamarix chinensis
Ailanthus altissima
Aptenia cordifolia
Pennisetum setaceum
Ricinus communis
Vinca major
Schinus molle
Schinus terebinthifolius
Washingtonia robusta
Foeniculum vulgare
Cortaderia jubata/selloana
Mesembryanthemum crystallinum
Contact your local Resource Conservation District for help identifying invasive species and for removal of exotic weeds from waterways. Visit the California Invasive Plant Council web site for suggested plants to replace invasives. (See the Resources Directory insert for contact information.)
Protect Water Quality
Make sure that the water that flows off your
property is clean.
! Prevent trash, debris, and waste of any kind
from washing off homesites and streets into
gutters, storm drains, and dry washes. These
drainage-ways empty into streams that flow
to the Santa Ana River, and ultimately, the
ocean.
! Evaluate the flow of runoff over your property.

Place manure, barnyard bedding, and debris
in areas where water does not pool or flow,
or reuse the waste as fertilizer or mulch.

Check with your local municipality for
ordinances concerning the disposal of
manure and bedding.
! Use care when applying fertilizers, pesticides, and herbicides on your property. Read labels “before you buy and before you apply” for directions, application rates, and disposal. Apply the correct amount at the proper time, for example, not during plant dormancy.

Diana Ruiz
Invasive rrundo donax) is
being removed from Temescal Creek.

Giant Reed (A
Dispose of waste in its proper place.
! Read product labels, and dispose of
household hazardous wastes (oil based
paints, pesticides, antifreeze, motor oil,
batteries, flourescent bulbs, etc.) in
prescribed ways and at designated
disposal sites or community collection
events, not on the ground or in a storm
drain inlet. Whenever possible, reduce
the use of hazardous materials in and
around your home. Call the Only Rain
Down the Storm Drain program for
disposal dates and locations. (See the
Resources Directory insert for contact
numbers.) You can also recycle
automotive fluids, tires, and batteries at
car repair businesses.
! Dispose of trash at sanitary landfills.
! Compost yard and other organic wastes.

Praying mantis Ladybird beetle Lacewing
Better yet:

Reduce,
Reuse,
Recycle.
! Reduce or eliminate the use of pesticides by using “beneficial insects” (ladybugs, praying mantids, lacewings, etc.) If you must use a pesticide, use one with a leasttoxic rating, such as insecticidal soaps, horticultural oils, pyrethrin-based insecticides, and insect growth regulators.
! Control erosion to prevent sediment from entering runoff. ! If you have a septic system, inspect and maintain it. Poorly placed and neglected septic systems contaminate groundwater and streams.

Pollutants that flow from residential and urban areas contaminate surface water and the water that percolates into underground water basins (aquifers). Much of our local water supply is pumped from underground aquifers, so keeping runoff clean is essential.

To report any non-emergency crime, such as dumping, please call your City Police or County Sheriff Departments. To report illegal grading or dumping in waterways, contact your City or County Code Enforcement Department. (See the Resources Directory insert for contact numbers.)
Photos by Greg Balmer
Diana Ruiz
Siting Homes Near Waterways
If you are building next to a waterway, leave a buffer
between the waterway and your human habitat area of
graded pads, structures, and ornamental landscaping.

Wildlife habitat land includes areas beyond buildings,
yards, and defensible space (fire safety zones),
generally to be left undisturbed for wildlife. A buffer between the human habitat and a waterway provides
space for habitat, flood waters, and for wildlife escape during high water.

The buffer or “setback” distance will vary according to site conditions, however a minimum 100-foot setback from the top edge of a waterway, not from the water itself, is recommended. This allows space for creek/stream meander and high water flows. The banks of creeks and streams “meander”, which means they are constantly “wandering” or relocating.

Meander naturally occurs when flows cause erosion of channel banks and deposition of sediment.

As land is converted to urban uses,
the volume of flow in waterways
increases. Impervious surfaces
from streets, roofs, and parking
lots increase the amount of runoff,
erosion and pollutants that
degrade water quality.

Provide Space for Habitat, Fire, and Flood Protection
Many people are not aware of the vulnerability of natural ecosystems, nor are they aware that it is illegal to grade or alter a waterway without an assessment and permits from resource agencies and municipalities. If you propose an activity that will impact a stream, river, or lake, the California Department of Fish and Game (DFG) requires completion of a Streambed Alteration Agreement.

Depending on the activity you are proposing, you may need to obtain a permit, agreement, or other authorization from one or more government agencies. Notify DFG, U.S. Army Corps of Engineers, and the Santa Ana Regional Water Quality Control Board during early planning, prior to beginning a project that will:
use material from a streambed;
divert, obstruct, or change the natural flow or the bed, channel, or bank of any river, stream, or lake; result in the disposal or deposition of debris, waste, or other natural material where it can pass into any river, stream, or lake.

A Streambed Alteration Agreement is also required for streams that flow intermittently, such as dry washes and waterways with subsurface flow.
!
!
!
A house pad fills an important tributary to an waterway.

Robert Caliva
Frank Heyming
When building homes In fire-prone areas, avoid ridge tops and canyons. Set buildings back from the edge of steep slopes. Create a minimum distance of 100-feet of defensible space, a managed area around a home, where the amount of fuel (dead plants, dry leaves, wood) has been reduced. Consult with your local fire department or the California Department of Forestry and Fire Protection for fire safety and weed abatement information. (Please see Resources Directory insert).

Habitat-friendly Yards
Landscape with Locals. Not just any California native
plant is suitable for landscapes near habitat lands. Local native plants are the safest because they have unique
characteristics that have helped them survive in their
specific environments. Gardening with local flora helps maintain the genetic integrity of local plants and
ecosystems. It helps maintain regional variation in
vegetation and wildlife.

Why is regional variation important? If plants from other areas crossbreed with local natives, scientists fear that local populations would lose some of the unique
characteristics that are important for success in this
region. Their genetic material would no longer be unique and regionally identifiable. Plant interbreeding could reduce biological diversity, biodiversity, in the gene pool. There are important interactions between native plants, microorganisms, and the animals that use them, some of which are critical to the reproduction and survival of native plants and animals.

Create habitat in your yard for urban-adapted wildlife. Even if you live in the heart of a city, consider gardening for urban-adapted wildlife by providing a reliable water source and local native plants that provide food, shelter, and nesting sites. Each small patch of yard provides a stepping-stone of habitat from wildlands across the city. A patchwork of habitatyards creates an urban ecosystem that more closely mimics our predevelopment, native landscape. When linked together, those patches cumulatively support biodiversity. To host a variety of native birds and butterflies in your yard, select plants that flower and fruit at different times of the year. Prune trees and shrubs in fall and early winter, rather than spring, to avoid destroying bird nests.

It is essential that landowners do not confine, or encroach on waterways. Keep buildings, septic systems, horses, livestock, fencing, agricultural and ornamental plantings out of waterways and away from channel banks.

Len Nunney
Water-wise Landscapes Conserve Water
Reduce water-use by replacing unnecessary lawn areas
with native or drought-tolerant plants and with hardscape (hard surfaces), such as walkways and patios of concrete, brick, stone, decomposed granite, and permeable paving.

For places where you do need a lawn, such as play areas, plant a low water-use turf variety.

When selecting a plant, find out:
! Is it water-thirsty or drought-tolerant?
! When is its growing season; when will it need water?
Most* local native plants are dormant or slow-growing
during the hot, dry summers; their growth occurs
during our rainy season. Once established, many
survive with rainfall alone. This is the opposite for nonnative, ornamental landscapes that grow slowly, or not at all during winter, but require irrigation throughout the summer. ! Group plants with similar watering needs together, and install water-saving irrigation systems (drip, micro-sprayers) to apply the correct amount for each hydro-zone or plant grouping. Trees require deep irrigation and may need separate irrigation lines. ! Readjust your irrigation schedule for season and weather conditions. Turn off automatic systems when it’s raining. Don’t run sprinklers when the wind is blowing. Water deeply and only when needed. Water plants in the early morning or evening. Adjust irrigation systems to water soil, not concrete and pavement.
! Apply mulch (bark, compost, sawdust, gravel) to reduce evaporation from the soil surface and to control weeds.

For information about conserving water in landscapes and using native and drought tolerant plants, refer to plant databases, such as the one at be wise.com. The website will also help you create a customized watering schedule for your yard. (See the Resources Directory insert for booklist and websites.)
*Not all native plants are dormant during summer: local riparian plants are the exception. They need water year round, as they are suited for waterways. Streamside vegetation, along dry or flowing waterways, is referred to as riparian.
water
Benefits of landscaping with local native plants:
! Most native plants are drought tolerant, so they require less water. ! Natives rarely require fertilizers.
! Patches of habitat support urban-adapted wildlife, such as birds, bats and insects that help pollinate plants.
! Natives rarely require pesticides. Native plants provide their own natural pest control by attracting beneficial insects that prey on troublesome bugs. ! Local natives help preserve genetic diversity and the integrity of local ecosystems.

Diana Ruiz
Fire-wise Landscaping
Zone 1:
0-30 ft. out from buildings. (
Zone 2:

Lean, Clean and Green
Zone 1 is from See diagram on prior page.)
Grow plants that are small or succulent, such as irrigated lawns or ground covers and low growing, high-moisture shrubs. If you use native plants, use those that can be trimmed back during the dry season or that stay small with little trimming. Native plants that tolerate summer watering (see native plant lists) should be kept well hydrated.* ! Keep plants well hydrated to help them resist fire. Well-trimmed and watered plants are less likely to ignite than desiccated plants that have a buildup of dry stems and leaves. ! Fire needs fuel to burn, so remove any unnecessary plant materials. Prune dead wood and clean the landscape of dead plants, dry leaves, dry brush, firewood, and combustibles.
! Strategically place hard surfaces in your landscape, such as concrete, brick, or stone patios, driveways, pools, walls, and non-flammable decks, to interrupt the spread of fire to buildings.

Create the reduced fuel zone beginning 30 ft. from buildings and extending 100 ft. or more, depending on steepness of slope and type/density of vegetation. ! Selectively remove large shrubby plants and dense groupings. Thin overcrowded plants. Mow grasses and weedy vegetation while they are green. ! Carefully remove excess plants without disturbing the soil; mow instead of disc, to prevent erosion and invasion of non-native plants.
! In chaparral plant communities, after thinning, reduce old, woody growth by cutting plants to their bases every few years, during the summer dormancy. Young plant tissues have higher moisture content and are less flammable. The heavy pruning eliminates mature, highly flammable vegetation but maintains root systems to protect the soil from erosion.
! Low branches and plants growing under trees create “ladders” for fire to climb.

Eliminate ladder fuels, plants that serve as a link between grass and treetops. Prune the lower branches from the lower 1/3 of trees and shrubs. For trees or shrubs taller than 18 feet, prune the lower branches 6 feet above the ground. Remove dead leaves, twigs, and branches.
! In general, remove shrubs that are growing below trees, unless there is a space between the top of the shrub to the lowest branch of the tree that is three times the height of the shrub.

Reduced Fuel
Remove plants that ignite easily and burn hot, such as those with volatile oils (sages) and those that accumulate fine woody branches or many small, dry leaves (chamise). In Zone 1, remove highly volatile plants (partial list below). In Zone 2, remove or widely space volatile plant types, including:

Chamise, Adenostoma fasciculata
Brittlebrush, Encelia farinosa
California buckwheat, Eriogonum fasciculatum
White sage, Salvia apiana
Some Eucalyptus and Acacia
Black sage, Salvia mellifera
Woolly blue curls, Trichostema lanatum
Mountain blue curls, Trichostema parishii
Red Shank, Adenostoma sparsifolium
All Pine, Cypress, Juniper, and Cedar species.
*For best results with native plants, water on overcast days during summer and fall.

Create a minimum distance of 100 ft. of defensible space, a landscape that deprives fire of fuel. Use fire-resistant plants and remove plants that are highly volatile.

Mild to moderate slope
(20% to 40% slope)
Four times (4x) the height of the shrub
(Two shrubs 2’ high should be
spaced 8’ apart)
Moderate to steep slope
(greater than 40% slope)
Six times (6x) the height of the shrub
(Two shrubs 2’ high should be
spaced 12’ apart)
Shrubs
Create Space Between Plants
From edge of one shrub to the edge of the next.

Flat to mild slope
(0% to 20% slope)
Mild to moderate slope
(20% to 40% slope)
Moderate to steep slope
(greater than 40% slope)
Trees
From edge of one tree canopy to the edge of the next.

Prevent erosion and stabilize eroding
areas. If you have exposed soil surfaces,
cover with mulch, and landscape as soon as
possible. (Plants break the impact of falling
rain, and their roots hold soil in place.) Eroding
soil becomes sediment in runoff water, which
pollutes waterways. Disturbed soil also
encourages the growth of non-native weed
species.

Retain thinned, deep-rooted native plants to
anchor the soil and maintain slope stability.

Generally, tall plants have deep, broad root
systems. A goal of fire-wise landscaping is to
maximize rooting depth while minimizing fuel
volume.

For site-specific advice, contact your local Resource Conservation District (RCD) or the USDA Natural Resources Conservation Service (NRCS). For recommendations of native grasses for erosion control, contact the California Native Grasslands Society. (See the Resources Directory insert for contact information.)
Flat to mild slope
(0% to 20% slope)
Two times (2x) the height of the shrub
(Two shrubs 2’ high should be
spaced 4’ apart)
Horizontal clearance information from the California Department of Forestry and Fire Protection.

Diana Ruiz
Shrubs that do not usually tolerate water during summer.

Low shrubs
Tall, deep-rooted shrubs that stay green during summer.

Bladder pod, Isomeris arborea
Bush monkeyflower, Mimulus aurantiacus
Chaparral honeysuckle, Lonicera subspicata
Hollyleaf redberry, Rhamnus illicifolia
Redberry, Rhamnus crocea
Yellow bush-penstemon, Keckiella antirrhinoides
Bigberry manzanita, Arctostaphylos glauca
Thick-leaved lilac, Ceanothus crassifolius
Buck brush, Ceanothus cuneatus
Hairy California lilac, Ceanothus oliganthus
Mountain mahogany, Cercocarpus betuloides
Laurel sumac, Malosma laurina
Scrub oak, Quercus berberidifolia
Sugarbush, Rhus ovata
Lemonade berry, Rhus integrifolia
California Flannel bush, Fremontodendron californicum
Coffeeberry
UDSA-NRCS PLANTS Database
Native Plants for Defensible Space Landscaping in the Inland Empire If you prefer to create a landscape of native, low water-use plants, use these lists to design a yard that is fire-wise. Maintenance is essential; dead and dry plant material must be removed during dry, summer dormancy. Some native plants cannot tolerate irrigation during their summer dormancy, so may die if watered too frequently. Some need only infrequent, deep watering to remain hydrated during the dry summer and fall. The low-growing, low-fuel volume plants are suitable for Zone 1 (0-30 ft.) and beyond.

Larger shrubs and trees, for Zone 2 (30-100+ ft.), must be widely spaced (see diagram on previous page).

Shrubs for Zone 2
Shrubs that need or tolerate water during summer.

Carpenteria, Carpenteria californica
Western redbud, Cercis occidentalis
Toyon, Heteromeles arbutifolia
Nevin’s barberry, Mahonia nevinii
Coffeeberry, Rhamnus californica
Golden current, Ribes aureum.

California wild rose, Rosa californica
Western bridalwreath, Spiraea douglasii
Squawbush, Rhus trilobata
Trees for Zone 2
Trees that tolerate occasional water during summer.

Trees that need water during summer.

Catalina cherry, Prunus illicifolia ssp. Lyonii
Coast live oak, Quercus agrifolia
Valley oak, Quercus lobata
Engelman oak, Quercus engelmannii
Big leaf maple, Acer macrophyllum
White alder, Alnus rombifolia
So. California walnut, Juglans californica
California sycamore, Platanus racemosa
California black oak, Quercus kelloggii
Canyon live oak, Quercus chrysolepis
Willows: Salix laevigata, S. gooddingii
California bay laurel, Umbellularia californica
Sugarbush
Big leaf maple
J. S. Peterson @ UDSA-NRCS
Yellow bush-penstemon
Arlee M.Montalvo Paul Aigner
If you live near conservation easement land or a waterway, there are ways that you can help. Be observant of activities that might be harmful to your nearby habitat lands, or form a habitat-watch group in your neighborhood. Like a neighborhood-watch, property owners help look out for neighborhood habitat and waterways, report illegal activity, and help educate neighbors about human impacts. For help forming a habitat-watch group, contact your local Resource Conservation District or the Riverside Land Conservancy.

Habitat Land Stewards
This publication was developed by the Riverside-Corona
Resource Conservation District. www.RCRCD.com
1-07
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Succulents, Ground Covers, and Low Shrubs
Keep hydrated; if needed, water monthly during summer.

San Diego sedge, Carex spissa
Wild lilac, Ceanothus griseus ‘horizontalis’
California fuchsia, Epilobium canum =Zauschneria
Golden yarrow, Eriophyllum confertiflorum
Lance-leaved live-forever, Dudleya lanceolata
Chalk dudleya, Dudleya pulverulenta
Parry’s nolina, Nolina parryi
Creeping sage, Salvia sonomensis
Creeping snowberry, Symphoricarpos mollis
Chaparral yucca, Yucca whipplei = Hesperoyucca whipplei Valley cholla, Opuntia parryi
Coastal prickly pear, Opuntia littoralis
Annuals or summer-dormant perennials
No need for water during summer. There is little, if any, plant material above ground to burn.

California poppy, Eschscholzia californica
Larkspurs, delphinium, Delphinium parryi, D.cardinale
Wild Canterbury-bell, Phacelia minor
California figwort, Scrophularia californica
Baby blue eyes, Nemophila menziesii
Royal penstemon, Penstemon spectabilis
Lupine, Lupinus species (L. bicolor, L. succulentus,
L. truncatus, L. sparsiflorus)
Perennial herbs that tolerate or need water during summer Yarrow, Achillea millifolium
Columbine, Aquilegia formosa
Douglas iris, Iris douglasiana
Deer grass, Muhlenbergia rigens
Calif. blue-eyed grass, Sisyrinchium bellum
Meadow rue, Thalictrum fendleri var. polycarpum
Yerba mansa, Anemopsis californica
Coral bells, Heuchera ssp.

Common monkey flower, Mimulus guttatus
Scarlet bugler, Penstemon centranthifolius
California goldenrod, Solidago californica
Hedge nettle, Stachys bullata
Slender sedge, Carex praegracilis
Narrow-leaved milkweed, Asclepias fascicularis
Narrow-leaved milkweed
Chaparral yucca
Baby blue eyes
Low-growing, (low fuel volume) Plants for Zones 1 and 2 Arlee M.Montalvo Arlee M.Montalvo Arlee M.Montalvo

Murrieta City CouncilMay 20, 2025

Murrieta City Council
May 20, 2025