API 1621 : 2010

SECTION 1 - GENERAL
1.1 Introduction
1.2 Purpose
1.3 Federal Requirements
1.4 Referenced Publications
SECTION 2 - ACCOUNTING SYSTEMS
2.1 Requirements
2.2 Implementation
SECTION 3 - PRODUCT LOSSES
3.1 Sources of Losses
3.2 Unavoidable Losses
    3.2.1 Description of Normal Losses
    3.2.2 Magnitude of Normal Losses
3.3 Controllable Losses
    3.3.1 Description of Normal Losses
    3.3.2 Leakage
    3.3.3 Spillage
    3.3.4 Theft
    3.3.5 Product Used on Premises
SECTION 4 - PROCEDURES FOR REDUCTION OF CONTROLLABLE
            LOSSES
4.1 Introduction
4.2 Daily Procedures
4.3 Procedure for Receipt of Product
4.4 Special Circumstances
SECTION 5 - MANUAL TANK GAUGING
5.1 Description
5.2 Federal Requirements
5.3 Conditions for Use
5.4 Form and Procedure
APPENDIX A - SAMPLE RECONCILIATION FORMS
APPENDIX B - PROCEDURE FOR TESTING ACCURACY OF
             GASOLINE-DISPENSING METERS
APPENDIX C - GAUGING PROCEDURE FOR UNDERGROUND
             HORIZONTAL TANKS
APPENDIX D - WATER-GAUGING PROCEDURE
APPENDIX E - MANUAL TANK GAUGING RECORD AND
             RECONCILIATION FORM

Covers the underground storage of motor fuels and used oil at retail and commercial facilities. It explains practices and procedures to assist the operator in controlling bulk stock losses, thereby achieving a high level of safety and pollution control while maximizing profits.