There are NO Federal or State listed rare, threatened, and endangered species and/or designated critical habitats that are located in the project area.

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Option 1. All operators associated with a construction site under this permit must develop a SWPPP consistent with the requirements in Part III.F prior to their submittal of the NOI.

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C. I plan on implementing controls associated with the activities requiring pollution prevention measures, referenced in Part III.A.3 of the permit.

• For equipment and vehicle fueling and maintenance
• For storage, handling, and disposal of building products, materials, and wastes

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D. I am a co-permittee/co-operator with one or more operators, but not in a common plan.

Erosion and Sediment Control Plan Approval Authority: Montgomery County

Plan ID Number: 290548

Permit Type: General Permit

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Signatory

Name: Mr.  Joseph  Humbertson

Organization: Triangle Contracting, LLC

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Address: PO Box 489, Frederick, Maryland 21705

Mailing Address: PO Box 489, Frederick, Maryland 21705

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Phone: 3016765090

Email: jhumbertson@trianglecontracting.com

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Permittees

Organization	Name	Email Address	Type
Triangle Contracting, LLC	Joseph Humbertson	jhumbertson@trianglecontracting.com	Primary

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Contact Person

Name: Mr.  Joseph  Humbertson

Phone: (301) 676-5090

Email: jhumbertson@trianglecontracting.com

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Tax Information

Tax Entity: Corporation/LLC

Site/Project Name: Germantown View SWM Pond Retrofit (Asset #10796)

Location Description: Grotto Lane, S of Great Seneca Hwy.

Address: Grotto Lane, Germantown, Maryland 20874

County: Montgomery County

Site Coordinates (N, W): 39.16695°,  -77.26644°

Total Site Area: 1.60 acres

Total Disturbed Area: 1.60 acres

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Site Contact Person

Name:   Mike  Kimble

Phone: (301) 337-0982

Email: mkimble@trianglecontracting.com

Construction Project

Project Start Date: 10/20/2025

Project End Date: 04/30/2026

Description: This is a stormwater management pond retrofit project to treat stormwater runoff meeting 2000 Maryland Department of the Environmental (MDE) Unified Sizing Criteria goals for water quality and extended detention to the maximum extent practicable in order to assist the Montgomery County Department of Environmental Protection (MCDEP) in compliance with its Municipal Separate Storm Sewer System (MS4) Permit, to bring facility into compliance with current safety requirements and to bring the existing facility into a state of good repair. All work is to follow the provided erosion and sediment control plans approved by the Montgomery County Department of Permitting Services. The retrofit includes replacing the existing riser, excavating the pond basin, and installing a clay liner on the upstream face of the embankment. Offsite flows will be diverted through the work area using clear water diversion pipes. Flows from the work area will be pumped through a sump pit and a filter bag. The area will be stabilized with topsoil, turfgrass seed, and native vegetation. The drainage area to the Asset #10796 facility is located mainly south of Great Seneca Highway, borders Climbing Ivy Drive to the west, Grotto Lane to the east, and local forest to the south, in Germantown, MD. The most distant flow travels generally eastward from the intersection of Great Seneca Highway and Climbing Ivy Drive, draining the majority of the Seneca Forest Community south of Great Seneca Highway. Once routed through the existing SWM pond, the watershed discharges to a tributary of Gunners Branch, which is a tributary of Great Seneca Creek.

Emergency-related project: No

Located within a floodplain: No

Located within a critical area: No

Types of Construction: Other -- 1629

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Discharge Information

Site Runoff: A municipal separate storm sewer system -- Montgomery County, Seneca Creek

Watershed Basin Code: 02140208

Does the site fall within a Tier II Watershed? No

Are the receiving waters listed on the current Maryland 303(d) list as impaired? Yes

Cause(s) of the impairment: Ions, Sediments

Use Class: Use I-P

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Permanent Stormwater Management Facilities

Stormwater management facilities waived or exempted? Exempted

Document Type	Document Name / Link	Date Modified
Certification of Erosion and Sediment Control Plan Approval	Sediment Control Permit Germantown View.pdf	10/8/2025 12:42:07 PM
Vicinity Map	Vicinity Map.pdf	10/10/2025 3:27:21 PM
Turbidity Monitoring Report	Turbidity Report_Germantown View_Q4.pdf	1/16/2026 2:00:56 PM