T/GZHG 033-2023 Monitoring specifications for groundfill mining water samples of phosphoric acid gypsum

Scope

Main Technical Content: 4. Monitoring Point Arrangement 4.1 Based on the phosphogypsum filling mining technology scheme, through on-site surveys, reasonable monitoring points are arranged, and a sampling plan is formulated in accordance with the requirements of HJ495. 4.2 The selection of monitoring points should be based on economic feasibility, facilitate sampling work, and be convenient for maintenance and management. 4.3 Combined with the actual filling production situation, the filling water quality monitoring points shall include but are not limited to: - Outside the filling retaining wall, in water ditches or puddles; - The inlet of the underground water tank; - The inlet of the surface water treatment station; - The discharge outlet of the surface water treatment station. 5. Sampling Methods and Requirements 5.1 Sampler 5.1.1 According to the requirements of HJ493, the selection of samplers shall be adapted to the type and object of the water samples collected, and manual or automatic samplers shall be selected according to actual conditions. 5.1.2 According to the requirements of HJ493, the minimum amount of water samples required and the containers to be used are shown in Table 1. Table 1: Monitoring Water Sampling Containers and Sampling Quantities Serial Number Testing Item Sampling Container Minimum Sampling Quantity/ml Minimum Sampling Number/bottle 1 pH Polyethylene bottle or glass bottle 250 2 Total phosphorus Polyethylene bottle or glass bottle 250 3 Ammonia nitrogen Polyethylene bottle or glass bottle 250 4 Fluoride Polyethylene bottle or glass bottle 250 5 Sulfate Polyethylene bottle, glass bottle, or borosilicate glass bottle 250 5.2 Sampling Methods The sampling shall be conducted in accordance with the standards HJ494 and HJ495, and: (1) The collected water samples shall not be mixed, and the detection items shall be measured separately; (2) The sampling point

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