What are the Equipment, Tools, and Reagents Required for Wastewater Sampling?

To be specific, in Clause 1, Article 8 of Circular 41/2020/TT-BCA, it is stipulated that the necessary equipment, instruments, and reagents for wastewater sampling include:

Necessary equipment, instruments, and reagents for wastewater sampling (Illustrative image)

- Reagents (preservative chemicals) include: Concentrated HNO3 or HNO3 1:1, concentrated H2SO4 or H2SO4 1:1, concentrated HCl or HCl 1:1, NaOH with a concentration from 6 M to 10 M, (CH3COO)2Zn 10%, Na2S2O3 or Na2SO3, deionized distilled water, and other necessary chemicals used for preserving environmental water samples according to TCVN 6663-3: 2016 (ISO 5667-3:2012): Water quality - Sampling - Part 3: Preservation and handling of water samples;

Chemicals used to preserve the samples must meet the purity level for analysis (PA). Distilled water must be deionized pure water, at least type 2 according to TCVN 4851:1989. All reagents must be properly stored. Reagent bottles must be labeled with expiration dates; expired reagents must be disposed of.

- Instruments and equipment include: narrow-mouth water sample containers made of plastic with capacities of 300ml, 500ml, 1000ml, 1100ml, or larger; narrow-mouth water sample containers made of white and brown glass with capacities of 300ml, 500ml, 750ml, 1000ml, or larger; narrow-mouth water sample containers made of borosilicate glass (BG) with capacities of 300ml, 500ml, 750ml, 1000ml, or larger; sterilized containers for microbiological samples (capacity of 150ml or more);

Manual wastewater sampling tools (sampling bucket with a handle of at least 1.2 m); plastic sampling bucket; garbage filter; membrane filter apparatus and filters with a pore size of 0.45 m; various pipettes for extracting concentrated chemicals; pH test paper; intermediate sample containers (plastic buckets with capacities of 10 liters to 15 liters); insulated containers of various sizes (capacity over 25 liters); ice gel (or cold ice); black plastic bags (to protect samples from light); transparent plastic bags (to cover clean instruments); laboratory wipe paper (roll paper); transparent adhesive tape (wide and narrow); wastewater sampling kits; accompanying documents with the sampling kit (templates of forms for Wastewater Sampling Plan, sample labels, sample seal labels, Minutes of Sample Collection and Sealing, Request for Environmental Sample Testing, Sample Collection Report, A4-sized document clips); screwdriver with small screws, stainless steel scissors, glass markers; rubber boots; gloves (rubber, nylon, fiber); medical masks, respirator masks; safety belts; rope used as a safety line and bucket rope; labor protection helmet; device for determining geographic coordinates (GPS); device or thermometer for measuring water temperature; field pH meter; camera or video recording equipment; lighting equipment for nighttime work.

See the full text of the regulation at Circular 41/2020/TT-BCA, effective from June 24, 2020.

Thu Ba

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