HJ/T 155-2004 was issued by the SEPA Announcement 66 of 2004, as one of the three standards concerning chemical testing.

As a nationally recommended standard, HJ/T 155 was formulated to safeguard the accuracy and authenticity of chemical testing data and standardize the quality control for chemical testing laboratories in China.

The guideline specifies basic requirements for laboratories committed to carry out environmental management related testing items on how to ensure good quality of the testing data.

The guidelines can be used as criteria of assessment for good laboratory practices in environmental management related testing or used for laboratories to establish and implement the system of good laboratory practices.

This standard is put forward by the Department of Science, Technology and Standards of SEPA

The Drafting Committee: Chemical Registration Center of the State Environmental Protection Administration (CRC-SEPA)