4.7 Wood Products Manufacturing

4.7.1 Emissions

Introduction

Emissions from this category include generation of small wood waste particles (sawdust) from woodworking operations such as sawing, planing, lathing, and sanding. Industries engaged on these operations include manufacturers of plywood, particleboard, hard board, and furniture.

Methodology

This category contains emissions from both point (Category 35) and area sources (Category 1907). Wood waste generated as particulate matter is removed from the wood working operations mainly for housekeeping purposes, by either a cyclone or a baghouse. The Data Bank contains throughput information submitted by individual plant by sources. Emissions are then calculated by using specific emission factors for a particular source operation supplied by the company. The point sources account for the majority of emissions from this category.

It was estimated that area sources account for 20% of the total throughput from this category. The area source total particulate emission factor was assumed to be 20 pounds/ton wood processed. Area source particulate emissions were calculated by multiplying the throughput by its emission factor.

4.7.1.1 Monthly Variation

The emissions over the 12 months were estimated based on the throughput data from each plant.

4.7.1.2 County Distribution

Emissions are distributed to the counties based on the location of the processing plant. The District’s data bank contains the information on plant location.

Table 4.13: County fractions.
category ALA CC MAR NAP SF SM SNC SOL SON
#35 Wood Products Mfg 5.9% 1.8% 0.6% 0.2% 16.1% 9.5% 2.9% 27.8% 35.2%
#1907 Wood Products Mfg (Area) 5.9% 1.8% 0.6% 0.2% 16.1% 9.5% 2.9% 27.8% 35.2%