U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 30, 2025

All TitlesTitle 40Chapter IPart 1090Subpart N - Subpart N—Sampling, Testing, and Retention

SCOPE OF TESTING
§ 1090.1310 - Testing to demonstrate compliance with standards.
§ 1090.1315 - In-line blending.
§ 1090.1320 - Adding blendstock to PCG.
§ 1090.1325 - Adding blendstock or PCG to TGP.
§ 1090.1330 - Preparing denatured fuel ethanol.
§ 1090.1300 - General provisions.

HANDLING AND PREPARING SAMPLES
§ 1090.1335 - Collecting, preparing, and testing samples.
§ 1090.1337 - Demonstrating homogeneity.
§ 1090.1340 - Preparing a hand blend from BOB.
§ 1090.1345 - Retaining samples.

MEASUREMENT PROCEDURES
§ 1090.1350 - Overview of test procedures.
§ 1090.1355 - Calculation adjustments and corrections.
§ 1090.1360 - Performance-based Measurement System.
§ 1090.1365 - Qualifying criteria for alternative measurement procedures.
§ 1090.1370 - Qualifying criteria for reference installations.
§ 1090.1375 - Quality control procedures.

TESTING RELATED TO GASOLINE DEPOSIT CONTROL
§ 1090.1390 - Requirement for automated detergent blending equipment calibration.
§ 1090.1395 - Gasoline deposit control test procedures.
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