Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:3550c
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 3550C
Character Range: 814623–816161

3550C                                 Ultrasonic extraction* using:

                                      a. for low concentration (individual compounds <20 mg/kg):
                                      dichloromethane
                                      or
                                      dichloromethane/acetone (1:1)
                                      or
                                      hexane/acetone (1:1)
                                      or
                                      methyl tertiary-butyl ether
                                      or
                                      methyl tertiary-butyl ether/methanol (2:1).

                                      The solvent system chosen should be shown to give satisfactory, reproducible recovery of analytes spiked into the particular matrix (soil type) under test.

                                      Analysts should determine an appropriate concentration limit and ensure that quantitative results are based on sample concentrations that do not exceed the instrumental range.

                                      b. for high concentration (individual compounds >20 mg/kg):
                                      dichloromethane
                                      or
                                      hexane.
CRC CARE TPH TECHNICAL WORKING GROUP  End-over-end tumbling/shaking

* Ensure samples do not overheat

10.2.6.3     Extract clean-up
This step is not usually necessary. The tables below list the specified US EPA SW-846 methods.