(a) This subpart is organized as follows:

(1) Sections 1090.1310 through 1090.1330 specify the scope of required testing, including special provisions that apply in several unique circumstances.

(2) Sections 1090.1335 through 1090.1345 specify handling procedures for collecting and retaining samples. Sections 1090.1350 through 1090.1375 specify the procedures for measuring the specified parameters. These procedures apply to anyone who performs testing under this subpart.

(3) Section 1090.1390 specifies the requirements for calibrating automated detergent blending equipment.

(4) Section 1090.1395 specifies the procedures for testing related to gasoline deposit control test procedure.

(b) If you need to meet requirements for a quality assurance program at a minimum frequency, the first shipment of product you receive from each distributor triggers the testing requirement for that distributor. Perform testing with the first shipment of product to demonstrate compliance for the testing period. The following example illustrates the requirements for testing based on sampling the more frequent of every 90 days or 500,000 gallons of certified butane you receive from each distributor:

(1) If you receive an initial shipment of certified butane from a distributor on March 1, perform testing on that batch to show that it meets standards. A passing result qualifies all further shipments of certified butane from that distributor until May 29, as long as you receive less than 500,000 gallons of certified butane from that distributor during those 90 days. In that case, the testing period ends May 29 and the next testing period starts when you receive another shipment of certified butane from that distributor on or after May 30.

(2) If you receive a shipment from that distributor before May 29 that that causes the total volume of certified butane from that distributor to exceed 500,000 gallons over the testing period, the date that batch is received represents the end of the testing period. The next testing period starts when you receive another shipment of certified butane from that distributor.

(c) Anyone acting on behalf of a regulated party to demonstrate compliance with requirements under this part must meet the requirements of this subpart in the same way that the party needs to meet those requirements for its own testing. The regulated party and the third party will both be liable for any violations arising from the third party's failure to meet the requirements of this subpart.

(d) Anyone performing tests under this subpart must apply good laboratory practices for all sampling, measurement, and calculations related to testing required under this part. This requires performing these procedures in a way that is consistent with generally accepted scientific and engineering principles and properly accounting for all available relevant information. The following examples illustrate how to apply good laboratory practices:

(1) You may exclude outlier data points for quality testing under § 1090.1375 as specified in ASTM D6299 (incorporated by reference, see § 1090.95), subject to the following requirements:

(i) The justification for exclusion must be an assignable cause that is not part of the normal process and does not result from common causes.

(ii) You must meet requirements for documenting and supporting exclusion of data points as specified in § 1090.1375(a)(4).

(2) [Reserved]

(e) Subpart Q of this part has provisions related to importation, including additional provisions that specify how to meet the sampling and testing requirements of this subpart.