II. Assessment results of level period
Sampling was conducted on November 2, 2015 in the level period. A total of 28
indexes were selected for testing, with the assessment results of individual factors
pollution as listed in Table 5.129.
Based on Table 5.129, it is known that 55.56% of the individual pollution
factors were greater than 1, indicating pollution of the groundwater. The individual
pollution exponents of the sixteen indexes of #1 monitoring well were greater than
1 including chloride, total dissolved solids, nitrate nitrogen, ammonia-nitrogen and
the like, with the greatest pollution indexes i.e. that of chloride, total phosphorus,
and nitrite nitrogen being 18.96, 66.59, and 15.00 respectively; those of the thirteen
indexes of #2 monitoring well were greater than 1 with the greatest pollution
indexes of chloride and total phosphorus being 6.18 and 4.24; those of the seventeen indexes of #6 monitoring well were greater than 1 with the greatest pollution
indexes of chloride, nitrite nitrogen, arsenic, and total phosphorus being 17.04,
14.00, 17.40, and 55.00 respectively; and those of the fourteen indexes of #7
monitoring well were greater than 1 with the greatest pollution indexes of nitrite
nitrogen being 45.00.
III. Assessment results of low flow period
Sampling was conducted on January 19, 2016 in the low flow period. A total of 28
indexes as are the same with the level period, were selected for testing, with the
assessment results of individual pollution exponents as listed in Table 5.130.
From Table 5.130, it is known that 59.26% of the individual pollution factors
were greater than 1, indicating pollution of the groundwater. The individual pollution exponents of the eighteen indexes of #1 monitoring well were greater than 1
including chloride, total dissolved solids, nitrate nitrogen, arsenic, total phosphorus
and the like, with the greatest pollution indexes i.e. that of chloride, total phosphorus, nitrite nitrogen, and arsenic being 27.25, 33.33, 15.00 and 4.80 respectively; those of the fifteen indexes of #2 monitoring well were greater than 1 with
the greatest pollution index of chloride being 12.25; those of the eighteen indexes of
#6 monitoring well were greater than 1 with the greatest pollution indexes of
chloride, permanganate index, arsenic, and total phosphorus being 11.76, 6.69,
25.00, and 29.89 respectively; and those of the thirteen indexes of #7 monitoring
well were greater than 1 with the greatest pollution indexes of chloride, nitrite
nitrogen and boron being 25.00, 303.00 and 2.43 respectively.
4. Source strength assessment of the hazardous wastes landfill
(1) Pollution source hazard classification
① Indexes, weights and scores
According to the aforementioned assessment method, the landfill scale (X 1 ) of the
hazardous wastes landfill is 22 Â 10
4 m
3 , scoring 4; the filling duration (X 2 ) is
12 years, scoring 5; the maximum percolate output (X 3 ) is 35 m
3 /d, scoring 10; the
anti-seepage materials (X 4 ) include the natural material liner + synthetic material
5.6 East China
379
Sampling was conducted on November 2, 2015 in the level period. A total of 28
indexes were selected for testing, with the assessment results of individual factors
pollution as listed in Table 5.129.
Based on Table 5.129, it is known that 55.56% of the individual pollution
factors were greater than 1, indicating pollution of the groundwater. The individual
pollution exponents of the sixteen indexes of #1 monitoring well were greater than
1 including chloride, total dissolved solids, nitrate nitrogen, ammonia-nitrogen and
the like, with the greatest pollution indexes i.e. that of chloride, total phosphorus,
and nitrite nitrogen being 18.96, 66.59, and 15.00 respectively; those of the thirteen
indexes of #2 monitoring well were greater than 1 with the greatest pollution
indexes of chloride and total phosphorus being 6.18 and 4.24; those of the seventeen indexes of #6 monitoring well were greater than 1 with the greatest pollution
indexes of chloride, nitrite nitrogen, arsenic, and total phosphorus being 17.04,
14.00, 17.40, and 55.00 respectively; and those of the fourteen indexes of #7
monitoring well were greater than 1 with the greatest pollution indexes of nitrite
nitrogen being 45.00.
III. Assessment results of low flow period
Sampling was conducted on January 19, 2016 in the low flow period. A total of 28
indexes as are the same with the level period, were selected for testing, with the
assessment results of individual pollution exponents as listed in Table 5.130.
From Table 5.130, it is known that 59.26% of the individual pollution factors
were greater than 1, indicating pollution of the groundwater. The individual pollution exponents of the eighteen indexes of #1 monitoring well were greater than 1
including chloride, total dissolved solids, nitrate nitrogen, arsenic, total phosphorus
and the like, with the greatest pollution indexes i.e. that of chloride, total phosphorus, nitrite nitrogen, and arsenic being 27.25, 33.33, 15.00 and 4.80 respectively; those of the fifteen indexes of #2 monitoring well were greater than 1 with
the greatest pollution index of chloride being 12.25; those of the eighteen indexes of
#6 monitoring well were greater than 1 with the greatest pollution indexes of
chloride, permanganate index, arsenic, and total phosphorus being 11.76, 6.69,
25.00, and 29.89 respectively; and those of the thirteen indexes of #7 monitoring
well were greater than 1 with the greatest pollution indexes of chloride, nitrite
nitrogen and boron being 25.00, 303.00 and 2.43 respectively.
4. Source strength assessment of the hazardous wastes landfill
(1) Pollution source hazard classification
① Indexes, weights and scores
According to the aforementioned assessment method, the landfill scale (X 1 ) of the
hazardous wastes landfill is 22 Â 10
4 m
3 , scoring 4; the filling duration (X 2 ) is
12 years, scoring 5; the maximum percolate output (X 3 ) is 35 m
3 /d, scoring 10; the
anti-seepage materials (X 4 ) include the natural material liner + synthetic material
5.6 East China
379