40 CFR 300 - CONTINGENCY PLAN

Appendix B  -- National Priorities List (by Rank) June 1992

National Priorities List (by Rank) June 1992
TABLE/GRAPH OMITTED

National Priorities List, Federal Section (by Group February 1991
TABLE/GRAPH OMITTED

National Priorities List, Federal Section (by Group) June 1992
TABLE/GRAPH OMITTED

(56 FR 5606, Feb. 11, 1991, as amended at 56 FR 11938, Mar. 21, 1991; 56 FR 46122, Sept. 10, 1991; 56 FR 48442, Sept. 25, 1991; 57 FR 356, Jan. 6, 1992)

Return to 40 CFR 300 - Main Menu

Appendix C  -- Revised Standard Dispersant Effectiveness and Toxicity Tests

Table of Contents
1.0 Introduction
2.0 Revised Standard Dispersant Effectiveness Test
3.0 Revised Standard Dispersant Toxicity Test (Not included)
4.0 Summary Technical Product Test Data Format (Not included)

References

Return to 40 CFR 300 - Main Menu

List of Illustrations

Figure Number

1 Test Tank
2 Suggested Hosing System
3 Schematic Diagram of Automatic Dispensing Pipette System

List of Tables

Table Number

1 Synthetic Seawater (Effectiveness Test)
2 Test Oil Characteristics: No. 6 Fuel Oil
3 Preparation of Standards for Calibration
4 Required Dispersant Effectiveness Tests Results
5 Synthetic Seawater (Toxicity Test)
6 Test Oil Characteristics: No. 2 Fuel Oil

1.0 Introduction

1.1 Scope and Application. These methods apply to "dispersants'' involving subpart J (Use of Dispersants and Other Chemicals) in 40 CFR Part 300 (National Oil and Hazardous Substances Pollution Contingency Plan). They are revisions to the EPA's Standard Dispersant Effectiveness and Toxicity Tests (1). Note that the toxicity test is also used for collecting agents and other chemicals.

1.2 Definition. Dispersants are defined as those chemical agents that emulsify, disperse, or solubilized oil into the water column or act to further the surface spreading of oil slicks in order to facilitate dispersal of oil into the water column.

2.0 Revised Standard Dispersant Effectiveness Test

2.1 Summary of Method. The test oil (100 ml) is applied to the surface of synthetic seawater contained in a cylindrical tank. The dispersant (3, 5, or 25 ml) is applied to the oil in a fine stream, and 3.0 minutes are allowed for the dispersant to contact the oil. The oil, dispersant, and seawater are mixed by hosing with a pressurized water stream for 1.0 minute. The contents of the tank are recirculated by a pump, and samples are withdrawn from the recirculation system after 10 minutes and after 2 hours of recirculation. The amount of oil dispersed is determined by measuring the absorbance of visible light after extraction of the dispersed oil with chloroform. Each test is repeated three times.

2.2 Apparatus. Test Tank. Construct the cylindrical test tank, 24 inches (600 mm) inside diameter by 28 inches (710 mm) high, of 16-gauge stainless steel. Install, as shown in Figure 1, the associated piping, valve, and pump for recirculation of dispersed oil and for sample collection.

ILLUSTRATION OMITTED

RETURN TO THE TOP

Return to 40 CFR 300 - Main Menu