MDE's Alternative/Innovative Technology Review Checklist (July 2014)

MDE's Alternative/Innovative Technology Review Checklist (July 2014)
Alternative/Innovative Technology Review Checklist
Product Name
Date Received
Street Address
Phone Number
MDE requires that a formal request be submitted to initiate the review process for alternative/innovative
technologies. If the following information is not provided with this request, no product review will be
Product Description: State what type of approval is being sought (e.g., ESD, structural practice, alternative
surface). Include a brief description of the practice and how it will be used. The description should include the
proposed use and identify if the practice is comparable to a generic practice listed in the 2000 Maryland
Stormwater Design Manual, Volumes I & II (the Manual). If the practice is not comparable to a generic practice
or deviates from the specifications listed in the Manual, monitoring data demonstrating compliance with the
general performance criteria must be submitted.
Technology Specifications: A description of the technology, including any components and process units, must
be provided. The following information is required:
Standard drawings, including schematics of the technology and a process flow diagram;
Projected operation and maintenance requirements and procedures;
Discussion of system hydraulics and sizing to meet performance standards and goals;
Range of operating conditions, including minimal, maximal, and optimal conditions for achieving
performance goals;
Discussion of any special licensing or hauling requirements, safety issues, and access requirements
associated with the operation and maintenance of the technology;
If comparable to a generic practice found in the Manual, then design standards & specifications, including
supporting calculations and test results, demonstrating compliance with the performance standards,
specifications, and design criteria (e.g., treatment volume, media composition, drainage area limitations)
found in Chapters 2, 3 and 5, and Appendices B.3 and B.4 shall be submitted; and
If the practice is not comparable to those in the Manual, then field monitoring data and results
demonstrating compliance with the general performance criteria found in Chapter 1, 2, and 5 of the
Manual shall be submitted. Field monitoring must conform to the standards listed below.
Monitoring Plan Contents: Field monitoring results are needed to support performance claims; laboratory
testing is not acceptable. The monitoring plan should fully describe the procedures and techniques used to
sample influent to and effluent from the alternative/innovative technology. MDE will accept field monitoring
that conforms to the most current versions of the Technology Acceptance Reciprocity Partnership (TARP)
Protocol (New Jersey Center for Applied Technology, 2003) or the Technology Assessment Protocol – Ecology
(TAPE, State of Washington, Department of Ecology, 2011). Where this is not the case, monitoring procedures
must conform to the following minimum standards derived from the TARP and TAPE protocol:
□ Location: Water quality samples and flow measurements must be collected from both the inlet and outlet
of an in-the-field installation of the stormwater practice.
Rainfall: The following criteria are required for scientifically valid data:
o A storm event must have a minimum total rainfall depth of 0.1 inches; A minimum of 20 storms need to
be sampled for device performance (sampled storms do not need to be consecutive);
o A minimum inter-event period of 6 hours between successive storm events, where the period starts
when runoff from the first storm ceases;
o To assess practice performance under large storm or surcharge events, the total rainfall from at least
one storm shall exceed the 1 year, 24-hour design storm (e.g., 2.7 inches of rainfall); and
o The minimum total rainfall for all storms sampled shall be 15 inches.
Flow: Influent, effluent, and bypass flows must be measured and continuously recorded over each storm
event during the entire field monitoring period. Influent and effluent flow measurements should be
recorded close to the stormwater practice. Bypass flow must not be measured in areas that are mixed
with effluent. Any conditions that may affect flow measurement accuracy (e.g., high groundwater,
backwater conditions) should be avoided.
Water Quality Sampling: Samples must be collected from both the inlet and outlet of each stormwater
practice at a location where stormwater flow is well-mixed. Parameters shall include total suspended
solids (TSS), total phosphorus (TP), and median particle size for each storm event. Sampling shall meet the
o Sufficient discrete samples should be taken to represent a minimum of 70% of a sampled storm’s total
runoff volume;
o A minimum of 10 discrete water quality samples (i.e., 10 influent and 10 effluent) shall be collected
using automated sampling methods for storms lasting 1 hour or more. Grab sampling is not
o TSS sampling and testing shall meet the following:
• Standard method (SM) 2540 D shall be used to establish the TSS removal efficiency;
• The mean influent TSS concentration should be in the range of 100-300 mg/L; and
• The mean particle size should not exceed 100µm;
o TP sampling and testing: Acceptable testing methods for establishing TP removal efficiency include
Environmental Protection Agency (EPA) 365.3 or 365.4; or SM 4500-P E or 4500-P F
o Particle size distribution (PSD) sampling and testing – ASTM Method D3977-7 shall be used.
Other parameters that are not required by MDE but may be sampled include pH, total petroleum
hydrocarbons (TPH), bacteria, or total dissolved metals (e.g., Cu, Zn). Where these are included, the
appropriate standard test methods shall be used to determine removal efficiency.
Documentation of Testing Results: The final report should include a description of site use (e.g., commercial
parking lot, roadway, construction site), and pertinent characteristics of area being treated (e.g., total area and
percent impervious). There should be a list of the number of storms tested, each storm’s peak rate, and the
total volumes treated by the device. The report should also provide information on total rainfall, runoff,
duration, intensity, and antecedent dry period for each storm tested. For each pollutant tested, results should
be presented for each storm individually and summarized statistically for all storms.
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