June 07, 2018
When sampling is required by a National Pollutant Discharge Elimination System (NPDES) stormwater discharge permit, samples must be obtained during a storm event. EPA defines a storm event at 40 CFR 122.21(g)(7)(ii) as a rainfall event with greater than 0.1 inch of rainfall and at least 72 hours from the previously measurable—greater than 0.1 inch rainfall—storm event.
Although the definition of a storm event described above dates back to when the federal regulations were published in 1983, the required measurement of 0.1 inches or greater is not a requirement in EPA’s 2015 Multi-Sector General Permit (MSGP) for Stormwater Discharges Associated with Industrial Activity.
Section 6.1.3 of EPA’s 2015 MSGP states that for all required monitoring:
- The monitoring must be performed during a measurable storm event that results in an actual discharge of stormwater from a site that follows the preceding measurable storm event by at least 72 hours
- In the case of snowmelt, monitoring must be performed at a time when a measurable discharge occurs at the site
- The 72-hour requirement is waived where the permittee documents that less than a 72-hour interval is representative for local storm events during the sampling period
- For each monitoring event, except snowmelt monitoring, you must identify:
- The date and duration (in hours) of the rainfall event,
- Rainfall total (in inches) for that rainfall event, and
- Time (in days) since the previous measurable storm event
- For snowmelt monitoring, you must identify the date of the sampling event
Learn more about the stormwater management requirements applicable to your facility by attending Environmental Resource Center’s Stormwater Regulations – Webcast.
Highest Rated Environmental, Safety & Transportation Training
Environmental Resource Center has provided the highest quality environmental, safety, and transportation training for over 25 years. Our instructors bring a wide range of practical experience to the classroom, conducting seminars and live webcasts with expert knowledge, interactive exercises and a fun, relaxed atmosphere. Environmental Resource Center’s classes are available as public seminars, instructor-led webcasts, self-paced online courses, and as customized on-site sessions designed to meet your company’s individual needs.
To view a complete list of Environmental Resource Center’s top-rated courses, go to www.ercweb.com/courses.
Upcoming Seminars
Raleigh – RCRA, DOT, IATA and HAZWOPER Training – June 18-22, July 10-12, July 23-26
Chattanooga – Hazardous Waste and DOT Training – June 12-14
Baltimore – Hazardous Waste, DOT, and IATA Training – June 19-22
Dayton – Hazardous Waste and DOT Training – June 26-28
Macon – Hazardous Waste and DOT Training – July 17-19
Cleveland – Hazardous Waste and DOT Training – July 24-26
Greensboro – Hazardous Waste and DOT Training – July 31-August 2
Dallas – Texas Hazardous Waste and DOT Training – July 31-August 2
Birmingham – Hazardous Waste and DOT Training – August 7-9
Indianapolis – Hazardous Waste and DOT Training – August 14-16
Richmond – Hazardous Waste and DOT Training – August 21-23
Ontario – California Hazardous Waste and DOT Training – August 21-23
Houston – Texas Hazardous Waste and DOT Training – August 28-30
Special offers for Reg of the Day™ readers: Register for any of the classes listed above and you can take advantage of offers 1 and 2 or 1 and 3.
- Register two attendees at full price and each additional person attends the same class for half price.
- Save $100 off your registration when you register for both Hazardous Waste and DOT training in the same city.
- Register for both Hazardous Waste and DOT training in the same city and get an Amazon Fire HD 10 tablet with electronic versions of both handbooks. The Amazon Fire offer is only available by phone. Call 800-537-2372 and mention the Amazon Fire offer. Only one tablet per student per 12-month period. Students receiving tablets will not receive paper versions of our handbooks. Payment must be made prior to the date of the seminar. You will receive your tablet at the class. This offer can be combined with offer #1, but cannot be combined with offer #2 above, or any discounts, promotions, or refunds.
Only one tablet per student per 12-month period. Students receiving tablets will not receive paper versions of our handbooks. Payment must be made prior to the date of the seminar. You will receive your tablet at the class. This offer can be combined with offer #1, but cannot be combined with offer #2 above, or any discounts, promotions, or refunds.
Eligible government organizations and agencies: Call Environmental Resource Center for GSA discounts.
Live Webcast Training You Can’t Afford to Miss
Environmental Resource Center’s live instructor-led webcast training is the best way to get the training you need—without leaving your office. Stay up-to-date with the latest regulations that can impact your facility and get your site-specific questions answered by our experienced, expert instructors.
Webcast special offer:
- Register two attendees at full price and each additional person attends the same class for half price.
Stormwater Regulations – June 12
RCRA Hazardous Waste Management – Annual Update – June 13, July 10, July 31
DOT: How to Ship Hazardous Materials by Ground – Update – June 14, July 11, August 1
How to Ship Batteries by Ground & Air – July 12
OSHA GHS Hazard Communication Standard – July 13
Solvent Wipe Rule – July 20
Universal Waste – July 23
Used Oil and Special Waste – July 25
Hazardous Waste Manifest Training – August 8
Online Training – At Your Convenience
Learn when it’s convenient for you. Environmental Resource Center’s self-paced online training makes it easy to learn how to comply with the latest regulations that can impact your facility, and meet your training requirements in our no-sweat online courses:
- DOT Hazardous Materials Training
- Reverse Logistics Shipments of Hazardous Materials
- How to Ship Batteries by Ground and Air
- How to Ship Dry Ice by Ground and Air
- How to Ship Consumer Commodities and Limited Quantities by Ground and Air
- How to Ship Bulk Hazardous Materials by Ground
- How to Ship Infectious Substances by Ground and Air
- How to Ship Medical Waste
- How to Work Safely with Bloodborne Pathogens
- OSHA GHS Hazard Communication Standard
- EPCRA: Tier II Reports & Emergency Release Notifications
- How to Manage Used Oil
- How to Manage Universal Waste
Customized Training
All of Environmental Resource Center’s top-rated training can be customized for your site. Site-specific training is an efficient and economical way to train your employees, reducing time away from the job and travel costs.
Environmental Resource Center® will tailor the scope of the training to meet your site-specific requirements, and deliver the training—at your site or as a live instructor-led or web-based session—whenever you need it.
For details or to request a quote for site-specific training, call 800-537-2372, email service@ercweb.com, or complete a training request form online.