Principles of sampling, analysis, and classification of sludge from special manufacturing process in Vietnam

Principles of sampling, analysis, and classification of sludge from special manufacturing process in Vietnam (Internet image)

Circular 32/2013/TT-BTNMT stipulates the sampling, analysis, and classification of sludge from special manufacturing process in Vietnam as follows:

Regulations on sampling and analysis

- The sampling and analyzing unit must have the certificate of eligibility to provide environmental monitoring services or appointed by an environment authority.

- The sampling and analyzing unit is obliged to:

• Take legal responsibility for the sampling and analysis result, which is the basis for classification and management of sludge.

• Appoint qualified employees to take samples and make sampling records.

• Apply the sampling principles and determination methods provided for in this Regulation.

- Where there are discrepancies between the analysis results given by two units, the environment authority shall appoint a third unit, which also satisfies all requirements in 3.1.1) as the adjudicator, and request both units to reperform the sampling and analysis for comparison purposes.

Regulations on sampling, analysis, and classification of sludge

• Samples must be taken on 03 different days, the sampling time on each day must be different (beginning, middle, or end of a shift or a batch).

• Sludge must be well stirred before being sampled; At least 03 samples at 03 random positions shall be taken.

• The mean value of analysis results shall be compared to the absolute threshold Htc or hazardous threshold according to leaching concentration Ctc to classify sludge

More details can be found in Circular 32/2013/TT-BTNMT which comes into force from January 1, 2014.

Ty Na

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