• Benzene series
Among the benzene series, styrene and xylene were detected in groundwater with
detection rates of 44.44% and 11.11% respectively. In specific, styrene was found
in ZK4, ZK5, BJ7 and MJ8, and xylene only in ZK4. According to the Quality
Standards for Groundwater (GB/T14848–2017), the concentrations of benzene
series are lower than the standard values (20 and 500 lg/L), which means no
excess.
• Chlorinated benzenes
Chlorobenzene is the only chlorinated benzene detected in groundwater with a
detection rate of 22.22%. The detected samples were taken at ZK5 and MJ8.
According to the Quality Standards for Groundwater (GB/T14848–2017), there is
no excess of chlorobenzene as its concentration is lower than the standard value
(500 lg/L).
• Organochlorine and phosphorus pesticide
The organochlorine and phosphorus pesticides detected in groundwater include
lindane (y-HCH), heptachlor and heptachlor expoxide with detection rates of
77.78%, 44.45% and 11.11% respectively. In specific, Lindane (y-HCH) was
detected in all sampling sites except for MJ8 and MJ9, heptachlor in ZK4, ZK5,
Fig. 5.12 Distribution map of sampling sites in Luanshiwan Landfill in Pengze County
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5 Application Cases