Table 3 Concentrations of volatile compounds exceeding health-based risk levels in samples collected in Wyoming

WY-4586

Fremont

5 m from separator

Hydrogen sulfide

590

I, A

n/a

WY-4586

Fremont

5 m from separator

Benzene

2,200

C, I, A

1/10,000

WY-4586

Fremont

5 m from separator

Toluene

1,400

C

n/a

WY-4586

Fremont

5 m from separator

Ethylbenzene

1,200

C

n/a

WY-4586

Fremont

5 m from separator

Mixed xylenes

4,100

C, I

n/a

WY-4586

Fremont

5 m from separator

n-hexane

22,000

C

n/a

WY-1103

Fremont

20 m from separator

benzene

31

C, I, A

1/100,000

WY-2069

Fremont

110 m from work-over rig^a

Hydrogen sulfide

30

I

n/a

WY-4861

Fremont

5 m from separator

Benzene

230

C, I, A

1/10,000

WY-4861

Fremont

5 m from separator

Mixed xylenes

317

C

n/a

WY-4861

Fremont

5 m from separator

n-hexane

2,500

C

n/a

WY-4478

Park

25 m from separator

Hydrogen sulfide

91

I

n/a

WY-4478

Park

25 m from separator

Benzene

110,000

C, I, A

1/10,000

WY-4478

Park

25 m from separator

Toluene

270,000

C, A

n/a

WY-4478

Park

25 m from separator

Mixed xylenes

135,000

C, I, A

n/a

WY-4478

Park

25 m from separator

n-hexane

1,200,000

C

n/a

WY-129

Park

55 m from separator

benzene

100

C, I, A

1/10,000

WY-3321

Park

5 m from compressor

benzene

35

C, I, A

1/100,000

WY-4883-005

Park

5 m from compressor

Formaldehyde

46

C, I

1/10,000

WY-4864

Park

5 m from discharge canal

Hydrogen sulfide

210

I, A

n/a

WY-4865

Park

10 m from discharge canal

Hydrogen sulfide

1,200

I, A

n/a

WY-4496

Park

20 m from well pad

Hydrogen sulfide

6,100

I, A

n/a

WY-106

Park

Adjacent to discharge canal

Hydrogen sulfide

5,600

I, A

n/a

WY-184

Park

15 m from discharge canal

Hydrogen sulfide

240

I, A

n/a

WY-187

Park

15 m from discharge canal

Hydrogen sulfide

66,000

I, A

n/a

WY-187

Park

15 m from discharge canal

Benzene

23

C, I

1/100,000