Table of Contents

0. EXECUTIVE SUMMARY
    0.1 Statement of Purpose
    0.2 Estimating Method
1. INTRODUCTION
2. NOMENCLATURE
3. OVERVIEW
4. STANDING IDLE EMISSIONS
    4.1 Fixed-Roof Tanks
    4.2 Floating-Roof Tanks
        4.2.1 Internal Floating-Roof Tanks with a Full or Partial
              Liquid Heel
        4.2.2 External Floating-Roof Tanks with a Full or Partial
              Liquid Heel
        4.2.3 Drain Dry Floating-Roof Tanks
5. VAPOR SPACE PURGE EMISSIONS
    5.1 Fixed-Roof Tanks
    5.2 Floating-Roof Tanks
6. SLUDGE REMOVAL EMISSIONS
    6.1 Overview of Methodology
    6.2 Derivation of the Vapor Concentration Method Equations
7. REFILLING EMISSIONS
    7.1 Fixed-Roof Tanks
    7.2 Floating-Roof Tanks
8. CONTROLLING EMISSIONS DURING CLEANING
9. EXAMPLE
    9.1 Description
    9.2 Days 1-2 Standing Idle after Normal Pumpout
    9.3 Day 3 Sludge Removal (with Prior Stock Remaining)
        9.3.1 Standing Idle Emissions during Day 3
        9.3.2 Vapor Space Purge Emissions during Day 3
        9.3.3 Sludge Removal Emissions during Day 3
    9.4 Days 4-5 Sludge Removal (with Diluent)
        9.4.1 Standing Idle Emissions during Days 4-5
        9.4.2 Vapor Space Purge Emissions during Days 4-5
        9.4.3 Sludge Removal Emissions during Days 4-5
    9.5 Days 6-7 Sludge Removal (No Free-standing Liquid Remaining)
        9.5.1 Standing Idle Emissions during Days 6-7
        9.5.2 Vapor Space Purge Emissions during Days 6-7
        9.5.3 Sludge Removal Emissions during Days 6-7
    9.6 Refilling Emissions
    9.7 Total Emissions
10. SUMMARY
APPENDIX A - ALTERNATIVE METHODS OF ESTIMATING SLUDGE REMOVAL
             EMISSIONS
APPENDIX B - LEL MONITORS AND RESPONSE FACTORS
APPENDIX C - DATA COLLECTION FORMS
REFERENCES

Abstract

Describes guidance for estimating emissions that result from removing the liquid heel (free-standing stock liquid) and cleaning the remaining deposits of stock liquid mixed with residue and water (sludge) from the bottoms of aboveground storage tanks.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN