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Field testing is ongoing as CMUD and independent labs continue to analyze the amounts of Trichlorobenzene and Polychlorinated biphhenyl (PCB) introduced into the sewer system. Since the illegal dumping of toxic materials, trichlorobenzene and PCB levels have fluctuated. The charts below detail test results obtained over the past few days. Levels will continue to fluctuate until the clean-up process is complete. CMUD will continue its testing. Information will be updated once available. Although some levels may be greater than our target values, the operations staff are significantly reducing PCBs and trichlorobenzene by adjusting wastewater treatment process to meet the necessary challenges. 
 

Lab results for Mallard Creek (as of Thursday, February 20, 2014)

PCB

(Discharge Target is less than 3 Parts Per Billion (PPB))*

Time (Friday, February 7) 

 

Effluent Levels (PPB) 

(Treated wastewater discharged into Mallard Creek)  

5:20 a.m.

4.8

6:00 a.m.

1.44

8:00 a.m.

1.7

9:58 a.m.

5.8

12:52 p.m.

3.1

2:51 p.m.  

3.9 

4:40 p.m. 

4.1  

6:29 p.m. 

3.9  

8:55 p.m.  

4.5 

10:53 p.m.

3.4

 

 

Saturday, February 8 

  

4:30 a.m.

3.1

8:18 a.m.

2.9

11:47 a.m.

3

3:55 p.m.

2.8

7:17 p.m.

2.5

 

 

Sunday, February 9 

 

12:04 a.m.

5

5:20 a.m.

2

7:34 a.m.

1.8

2:06 p.m.

1.4

Monday, February 10
​7:22 a.m. ​1.41
​8:24 a.m. ​1.16
​8:59 a.m. ​2.11
​11:14 a.m. ​1.34
​2:18 p.m. ​1.8
​3:28 p.m. ​2.1
Tuesday, February 11
​7:09 a.m.​ 1.6​
7:12 a.m.​ 0.9​
​8:10 a.m. ​1.3
​11:00 a.m. 1.3​
2:04 p.m.​ ​1.3
Wednesday, February 12
7:14 a.m.​ 0.86​
8:25 a.m.​ <0.5​
10:53 a.m.​ 0.65​
Thursday, February 13​
​6:20 <0.5​​
​6:25 0.56​
​8:16 ​<0.5​
Friday, February 14
​6:38 ​0.55
​6:43 ​​<0.5​
​11:00 ​0.7
​17:10 ​0.62
Saturday, February 15
6:22​ 0.59​
​6:58 ​0.55
​8:15 ​0.53
​11:12 ​​<0.5​​
​14:08 0.79​
​17:10 ​0.57
Sunday, February 16
​6:25 0.54​
​7:11 ​<0.5​​
​8:10 ​<0.5​​
​11:10 ​<0.5​​
​14:05 <0.5​​​
​17:12 ​<0.5​​
Monday, February 17
​6:11 ​<0.5​​​
​7:10 ​<0.5​​​
​8:25 ​​<0.5​​
​11:03 ​​<0.5​​
​13:58 ​​<0.5​​
​17:01 ​​<0.5​​
Tuesday, February 18
​6:12 ​​​<0.5​​
​7:03 ​​​<0.5​​
​8:13 ​​​<0.5​​
​11:02 ​0.5

 

 

Trichlorobenzene

(Target Concentration in Stream is less than 61 Parts Per Billion)*

Time (Friday, February 7)  

Effluent Levels (PPB)

 

(Treated wastewater discharged into Mallard Creek)  

6 a.m.

12

8 a.m.

13

10 a.m.

64

12:52 p.m.

160

2:51 p.m.

190

4:40 p.m.

200

6:29 p.m.

160

8:55 p.m. 

92  

 

  

Saturday, February 8

 

4:31 a.m.

27

8:18 a.m.

32

11:47 a.m.

52.9

3:55 p.m.

61.6

7:17 p.m.

85.8

 

 

Sunday, February 9

 

12:04 a.m.

66

5:20 a.m.

n/a

7:34 a.m.

53

10:59 a.m.

55

4:55 p.m.

72

 

 

Monday, February 10
​7:22 a.m. ​60
​8:24 a.m. ​35
​8:59 a.m. ​53
​11:14 a.m. ​71
​2:18 p.m. ​90
​3:28 p.m. ​88
Tuesday, February 11​
11:00 a.m.​ 94​
2:04 p.m.​ 100​
Wednesday, February 12​
​10:53 a.m. 72​

  

 

Trichlorobenzene

Time

 

 

Influent Levels (PPB)

(Raw wastewater entering plant)  

Thursday, February 6 1:30 p.m.

10,000

8:25 p.m.

4,200

9:25 p.m.

2,100

10:25 p.m.

1,700

11:25 p.m.

1,400

Friday , February 7 12:35 a.m.

810

1: 30 a.m.

500

2:25 a.m.

370

3:32 a.m.

260

8:03 a.m.

140

8:47 a.m.

190

1:16 p.m.

100

6:37 p.m.  

47 

10:58 p.m.

46

Saturday , February 8 8:11 a.m.

30.7

Sunday February 9 ​5:12 a.m. ​14.1
5:15 p.m. ​10.7
Monday, February 10 ​19.1
​Wednesday, February 12 ​100.2
Friday, February 14​ ​65.3