19-074-RPT-CSWPPP-2025.01.06 (4364)Construction Stormwater General Permit
Stormwater Pollution Prevention Plan
(SWPPP)
for
Deutscher – Yelm Commercial
Prepared for:
The Washington State Department of Ecology
Southwest Regional Office
Permittee / Owner Developer Operator / Contractor
Marijke Deutscher TBD TBD
15142 Berry Valley Road, Yelm, WA 98597
Certified Erosion and Sediment Control Lead (CESCL)
Name Organization Contact Phone Number
TBD TBD TBD
SWPPP Prepared By
Name Organization Contact Phone Number
Ahmad Kamyab Hatton Godat Pantier, Inc. (360) 943-1599
SWPPP Preparation Date
January 6, 2025
Project Construction Dates
Activity / Phase Start Date End Date
Permit Spring 2025 Fall 2026
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Table of Contents
1 Project Information .............................................................................................................. 4
1.1 Existing Conditions ...................................................................................................... 4
1.2 Proposed Construction Activities .................................................................................. 4
2 Construction Stormwater Best Management Practices (BMPs) ........................................... 6
2.1 The 13 Elements .......................................................................................................... 6
2.1.1 Element 1: Preserve Vegetation / Mark Clearing Limits ........................................ 6
2.1.2 Element 2: Establish Construction Access ............................................................ 6
2.1.3 Element 3: Control Flow Rates ............................................................................. 7
2.1.4 Element 4: Install Sediment Controls .................................................................... 7
2.1.5 Element 5: Stabilize Soils ..................................................................................... 8
2.1.6 Element 6: Protect Slopes..................................................................................... 9
2.1.7 Element 7: Protect Drain Inlets ............................................................................. 9
2.1.8 Element 8: Stabilize Channels and Outlets ..........................................................10
2.1.9 Element 9: Control Pollutants ...............................................................................10
2.1.10 Element 10: Control Dewatering ..........................................................................12
2.1.11 Element 11: Maintain BMPs .................................................................................12
2.1.12 Element 12: Manage the Project ..........................................................................13
2.1.13 Element 13: Protect Low Impact Development (LID) BMPs .................................15
3 Pollution Prevention Team .................................................................................................16
4 Monitoring and Sampling Requirements ............................................................................17
4.1 Site Inspection ............................................................................................................17
4.2 Stormwater Quality Sampling ......................................................................................17
4.2.1 Turbidity Sampling ...............................................................................................17
4.2.2 pH Sampling ........................................................................................................19
5 Discharges to 303(d) or Total Maximum Daily Load (TMDL) Waterbodies .........................19
5.1 303(d) Listed Waterbodies ..........................................................................................19
5.2 TMDL Waterbodies .....................................................................................................19
6 Reporting and Record Keeping ..........................................................................................20
6.1 Record Keeping ..........................................................................................................20
6.1.1 Site Log Book ......................................................................................................20
6.1.2 Records Retention ...............................................................................................20
6.1.3 Updating the SWPPP ...........................................................................................20
6.2 Reporting ....................................................................................................................20
6.2.1 Discharge Monitoring Reports ..............................................................................20
6.2.2 Notification of Noncompliance ..............................................................................21
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List of Tables
Table 1 – pH-Modifying Sources ...............................................................................................11
Table 2 – Team Information ......................................................................................................16
Table 3 – Turbidity Sampling Method ........................................................................................17
Table 4 – pH Sampling Method .................................................................................................19
List of Appendices
Appendix/Glossary
A. Site Map
B. BMP Detail
C. Correspondence
D. Site Inspection Form
E. Construction Stormwater General Permit (CSWGP)
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List of Acronyms and Abbreviations
Acronym / Abbreviation Explanation
303(d) Section of the Clean Water Act pertaining to Impaired Waterbodies
BFO Bellingham Field Office of the Department of Ecology
BMP(s) Best Management Practice(s)
CESCL Certified Erosion and Sediment Control Lead
CO2 Carbon Dioxide
CRO Central Regional Office of the Department of Ecology
CSWGP Construction Stormwater General Permit
CWA Clean Water Act
DMR Discharge Monitoring Report
DO Dissolved Oxygen
Ecology Washington State Department of Ecology
EPA United States Environmental Protection Agency
ERO Eastern Regional Office of the Department of Ecology
ERTS Environmental Report Tracking System
ESC Erosion and Sediment Control
GULD General Use Level Designation
NPDES National Pollutant Discharge Elimination System
NTU Nephelometric Turbidity Units
NWRO Northwest Regional Office of the Department of Ecology
pH Power of Hydrogen
RCW Revised Code of Washington
SPCC Spill Prevention, Control, and Countermeasure
su Standard Units
SWMMEW Stormwater Management Manual for Eastern Washington
SWMMWW Stormwater Management Manual for Western Washington
SWPPP Stormwater Pollution Prevention Plan
TESC Temporary Erosion and Sediment Control
SWRO Southwest Regional Office of the Department of Ecology
TMDL Total Maximum Daily Load
VFO Vancouver Field Office of the Department of Ecology
WAC Washington Administrative Code
WSDOT Washington Department of Transportation
WWHM Western Washington Hydrology Model
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1 Project Information
Project/Site Name: Deutscher – Yelm Commercial
Street/Location: 15152 Berry Valley Road
City: Yelm State: WA Zip code: 98597
Subdivision: N/A
Receiving waterbody: Thompson Creek
1.1 Existing Conditions
Total acreage (including support activities such as off-site equipment staging yards, material storage
areas, borrow areas).
Total acreage: 5.36
Disturbed acreage: 2.85
Existing structures: Day Care Building
Landscape topography: The site is generally flat, with slopes ranging from 1% to 3%.
Drainage patterns: In the current condition stormwater runoff in undeveloped areas
sheet flow on-site and infiltrate through native soils. The majority of
the project surrounding areas are developed and there is no off-site
stormwater runoff to the property.
Existing Vegetation: The site Phase 2 area are cleared previously for construction, and it
is covered with native grass.
Critical Areas (wetlands,
streams, high erosion
risk, steep or difficult to
stabilize slopes):
The site is located within category I Critical Aquifer Recharge Area
and is in the ten-year time of travel zone for a Group A well owned
by the City of Yelm.
List of known impairments for 303(d) listed or Total Maximum Daily Load (TMDL) for the receiving
waterbody: N/A
1.2 Proposed Construction Activities
Description of site development (example: subdivision):
Commercial buildings
Description of construction activities (example: site preparation, demolition, excavation):
Clearing, grubbing, installation of new utilities, parking lot, stormwater facilities, and landscaping.
Description of site drainage including flow from and onto adjacent properties. Must be consistent
with Site Map in Appendix A:
Stormwater runoff for the entire site was designed and constructed with Phase 1 “Yelm Day Care”
construction. Runoff from Phase 2 roof areas will be connected to 2 infiltration trenches for 100%
infiltration onsite and runoff from paved parking areas as well as sidewalks will be connected to the
existing infiltration pond for 100% infiltration.
Description of final stabilization (example: extent of revegetation, paving, landscaping):
At project completion, the property will contain 3 commercial buildings, paved parking areas, sidewalks,
landscaping areas, associated utilities.
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Contaminated Site Information:
Proposed activities regarding contaminated soils or groundwater (example: on-site treatment
system, authorized sanitary sewer discharge):
N/A