Nan Zhiqiao: "It's not necessary to dig a new well, since the mercury poisoning patients coincide with the deep groundwater line, then these patients may have been in direct contact with the deep groundwater, go to the waterline and investigate again, there will definitely be a civilian deep water well." ”

After the discussion, Nan Zhiqiao, Ye Zhenzhen, Liang Lei, and Section Chief Zhuang of the Environmental Protection Bureau returned to Nanwan Town.

This time, the goal is clear, which is the deep underground water line.

The deep groundwater line follows the terrain from west to east, along the direction of the Nanwan River, from the upstream mountains, through the underground of Nanwan Town, and finally through the brackish water junction area, and finally from the underground into the sea.

Liang Lei and several members of the Environmental Protection Bureau went to the vicinity of the deep underground water line in Nanwan Town, and after investigation, they found two deep wells in the residential area with symptoms of mercury poisoning.

A well is located in a farmer's market near the Nam Van River, the well is more than 160 meters deep, the wellhead is only about 30 centimeters, and there is an electric water pump under the well, and the deep groundwater is pumped up through the pump to supply the entire farmer's market with water.

Another well is located in a small seaweed processing plant in the lower reaches of the Nam Van River, with a depth of more than 180 meters, and it is also a deep-water well with a round mouth of more than 30 centimeters in diameter.

The investigation team took samples from the deep-water well, and at the same time sampled the plants and animals around the deep-water well, as well as various semi-finished and finished foods from the seaweed processing plant.

After the sampling was completed according to the plan, the samples of deep groundwater, as well as other animal and plant and food samples, were prepared to be sent to the Environmental Protection Bureau and the Center for Disease Control and Prevention for testing.

The investigation team was about to return to Lianhai City, but Nan Zhiqiao dragged Zhen Zhen to stay in Nanwan Town.

Ye Zhenzhen had a question in her heart, and felt that she should go back to the CDC to help with testing at this time, but Nan Zhiqiao chose to stay in Nanwan Town, is there any other sample to collect?

"Senior Nan, do you want to go somewhere else for sampling?"

In front of everyone in the investigation team, Nan Zhiqiao smiled and took Zhen Zhen's hand, "No, I just want to take you to see this Nanwan ancient town." ”

Nan Zhiqiao, who has always been serious, suddenly became gentle, and the entire investigation team was stunned, but Liang Lei was the first to respond with a smile, "Yes, Mr. Nan has been in Lianhai City for more than a week, and I haven't seen the scenery of Lianhai City. ”

After greeting the rest of the investigation team, Nan Zhiqiao took Zhen Zhen's hand and left.

Returning to the off-road vehicle that Nan Zhiqiao drove himself, Nan Zhiqiao let go of Zhen Zhen's hand, and his face became serious.

Ye Zhenzhen knew that Nan Zhiqiao, who left aside the investigation team, must have other plans, so she asked: "Senior Nan, it wasn't like your style just now, now the mercury poisoning incident is so tricky, and there are many people who are concerned, if you can't find the source of pollution, the public panic will spread, and at this time, you won't be in the mood to watch the scenery here with me." ”

A smile appeared on Nan Zhiqiao's serious face, "You still understand me, yes, I have other arrangements." ”

Nan Zhiqiao took out a stack of data paper from the off-road vehicle, handed it to Zhen Zhen, and said, "This is the information of the four factories upstream, you can take a look." ”

After taking the information, Ye Zhenzhen took a cursory look at it and asked, "Senior Nan, do you want to investigate these four factories?"

"Yes, I speculate that the source of the mercury poisoning incident is one of these four factories, and it is up to us to secretly visit which one of them is. ”

"Senior Nan, are you sure? The test results of the deep groundwater have not yet come out. ”

Nan Zhiqiao analyzed Ye Zhenzhen: "From the current investigation, pollution began to appear at the mouth of the Nanwan River, and there was an accumulation of methylmercury in the fish and shrimp in that water, but the mercury content was not too high, which shows that the water area was polluted for an infrequent time, presumably in half a year to a year." It is no coincidence that the distribution of people with symptoms of mercury poisoning is clearly regional, and this regionality coincides with the deep groundwater line. ”

Speaking of this, Nan Zhiqiao paused slightly, and Ye Zhenzhen continued to follow Nan Zhiqiao's analysis: "What can directly pollute the deep groundwater must be someone who directly discharges mercury-containing wastewater into the ground through external force, and the most direct way is to discharge the wastewater into the deep well, so that the wastewater can be disposed of unconsciously." ”

The more Ye Zhenzhen said that her face became more and more ugly, and in the end, she could no longer imagine the consequences of discharging wastewater into deep wells for a long time.

Seeing that Zhen Zhen had already understood his speculation, Nan Zhiqiao patted Zhen Zhen on the shoulder and comforted: "We will go and investigate now, the deep well used to discharge sewage will definitely be found." ”

Ye Zhenzhen thought of a report she had read a long time ago, there was a paper mill in a certain city, and many deep wells were drilled in the factory, and during the day, the groundwater was pumped to make paper, and at night, when no one was inspecting, the deep water was discharged.

The wastewater soon polluted the groundwater, and the surrounding residents felt that the groundwater began to smell, and the incidence of cancer among the residents also increased significantly.

Finally, after a report from a resident, the Environmental Protection Bureau found two sewage wells in the corner of the paper mill that were usually covered with manhole covers, sand and weeds.

Thinking of the previous example, Ye Zhenzhen was a little worried, "Senior Nan, those factories all know that it is illegal to discharge sewage into deep-water wells, so they don't dare to move during the day, and only dare to do this kind of thing at night, and the sewage wells are very hidden, how can we investigate? Can't we go directly to the factory and say that we are environmental monitoring staff, right?"

Nan Zhiqiao: "Of course it's not a clear investigation, we have to make an unannounced visit to find evidence." ”

Ye Zhenzhen: "Well, they should make secret visits, and if they are clear, they will prepare in advance, and the Environmental Protection Bureau will regularly inspect the factory, but they have not found that the illegal sewage well must have been hidden by the factory." ”

Nan Zhiqiao said about the plan to visit the factory sewage well, Zhen Zhen added her opinions, and finally the two made a plan:

It was noon, and in the afternoon, the two of them drove to the vicinity of the factories in the upper reaches of the Nam Van River to observe the terrain and the external outfalls of each factory.

At night, he disguised himself as a worker and entered the factory to investigate.

While Zhen Zhen was struggling with how to get into the factory, Nan Zhiqiao took out several sets of workers' clothes from the trunk of the SUV.

There are eight sets of clothes with different factory markings, and they are all male and female, and there are matching badges to prove their identity.

Vera picked up one of the badges, with a photo and a name on it.

Looking at the familiar face on the badge photo, as well as the familiar words, Ye Zhenzhen read out the name on it in shock: "Ye Zhenzhen?!"

"Senior Nan, these badges are your characteristics, when did you do these things? I don't know at all. ”

Facing Zhen Zhen's surprise, Nan Zhiqiao just smiled mysteriously, "These are all ordered for me by asking Liang Chen a few days ago, and I just arrived today." ”