The SWPPP shall address the following minimum components:
The following numeric effluent limitations shall be met by existing and new facilities. Wet deck storage area runoff. Nonstormwater discharges from areas used for the storage of logs where water, without chemical additives, is intentionally sprayed or deposited on logs to deter decay or infestation by insects are required to meet the following effluent limitations: pH shall be within the range of 6.0-9.0, and there will be no discharge of debris. Chemicals are not allowed to be applied to the stored logs. The term "debris" is defined as woody material, for example, bark, twigs, branches, heartwood, or sapwood that will not pass through a 2.54 cm (1 in.) diameter round opening and is present in the discharge from a wet deck storage area. Permittees subject to these numeric limitations shall be in compliance with these limitations through the duration of permit coverage.
Table 90-1 Sector A - Numeric Effluent Limitations | |
Parameter | Effluent Limitations |
Wet Decking Discharges at Log Storage and Handling Areas (SIC Code 2411) | |
pH | 6.0 - 9.0 s.u. |
Debris,woody material (e.g., bark, twigs, branches, heartwood, or sapwood) | No discharge of debris that will not pass through a 2.54 cm (1") diameter round opening. |
Table 90-2 Sector A - Benchmark Monitoring Requirements | |
Pollutants of Concern | Benchmark Concentration |
General Sawmills and Planing Mills (SIC Code 2421) | |
Total Suspended Solids (TSS) | 100 mg/L |
Wood Preserving Facilities (SIC Code 2491) | |
Total Recoverable Arsenic1 | 150 µg/L |
Total Recoverable Chromium1 | 16 µg/L |
Total Recoverable Copper1 | 13 µg/L |
Log Storage and Handling Facilities (SIC Code 2411) | |
Total Suspended Solids (TSS) | 100 mg/L |
Hardwood Dimension and Flooring Mills; Special Products Sawmills, not elsewhere classified; Millwork, Veneer, Plywood and Structural Wood; Wood Containers; Wood Buildings and Mobile Homes; Reconstituted Wood Products; and Wood Products Facilities not elsewhere classified (SIC Codes 2426, 2429, 2431-2439 (except 2434), 2441, 2448, 2449, 2451, 2452, 2493, and 2499). | |
Total Suspended Solids (TSS) | 100 mg/L |
Mulch, Wood, and Bark Facilities (SIC Code 24991303) | |
Total Suspended Solids (TSS) | 100 mg/L |
Chemical Oxygen Demand (COD) | 120 mg/L |
Facilities with Mulch Dyeing/Coloring Operations (SIC Code 24991303): Monitor ONLY those outfalls from the facility that collect runoff from areas where mulch dyeing/coloring activities occur, including but not limited to areas where loading, transporting, and storage of dyed/colored mulch occurs.2 | |
Total Suspended Solids (TSS) | 100 mg/L |
Biochemical Oxygen Demand (BOD5) | 30 mg/L |
Chemical Oxygen Demand (COD) | 120 mg/L |
Total Recoverable Aluminum | 1,100 µg/L |
Total Recoverable Arsenic | 150 µg/L |
Total Recoverable Cadmium | 1.8 µg/L |
Total Recoverable Chromium | 16 µg/L |
Total Recoverable Copper | 13 µg/L |
Total Recoverable Selenium | 5.0 µg/L |
Total Recoverable Silver | 3.2 µg/L |
Total Recoverable Zinc | 120 µg/L |
Total Nitrogen | 2.2 mg/L |
Total Phosphorus | 2.0 mg/L |
1Monitoring for metals (arsenic, chromium and copper) is not required for wood preserving facilities using only oil-based preservatives. | |
2Benchmark monitoring waivers are available to facilities utilizing mulch dye or colorant products that do not contain the specified parameters provided that (i) monitoring from samples collected during one monitoring period demonstrates that the specific parameter in question is below the quantitation level; (ii) a waiver request with attached laboratory certificate of analysis is submitted to and approved by the department; and (iii) a certification statement is submitted to the department annually that the facility does not use mulch dyeing products that contain any of the specifically waived parameters. Approved benchmark monitoring waivers shall be kept with the SWPPP. |
9 Va. Admin. Code § 25-151-90
Statutory Authority: § 62.1-44.15 of the Code of Virginia; § 402 of the Clean Water Act; 40 CFR Parts 122, 123, and 124.