o MONTGOMERY WATSON

July 22, 1997

Beth Reiner (SR-6J) Remedial Project Manager U.S. Environmental Protection Agency Region 5 77 W. Jackson Blvd. Chicago, Illinois 60604-3590

Re: Additional Requested Information Refuse Hideaway Landfill Site

Dear Ms. Reiner:

us EPA RECORDS CENTER REGION 5

431866

As you requested, I have gathered additional information to assist John Wilson, CH2M-Hill, and you in evaluating existing conditions at the Refuse Hideaway Landfill and the Predesign and Additional Studies Work Plan. The enclosed information relates to:

• Existing source control measures (cap, leachate, and gas extraction systems). • Groundwater quality trends at monitored locations near the landfill.

EXISTING SOURCE CONTROL MEASURES

Information enclosed related to the landfill cap, leachate extraction, and gas extraction systems includes:

• Drawing B3, Leachate and Gas Extraction Well and Gas Probe Locations, from the June 1997 Predesign and Additional Studies Workplan.

• Drawing 15292-Dl, Gas and Leachate Extraction System Layout, Warzyn, November 1991.

• Geologic Cross Sections A-A', B-B', and C-C from the Infield Conditions Report, RMT, January 1988.

• Conceptual Cross Sections A, B, and C, from the Infield Conditions Report, RMT, January 1988.

• Table of leachate heads prior to and including extraction system startup.

The geologic cross sections from the RMT report illusfrate geologic conditions below and around the landfill. The Conceptual Cross Sections A, B, and C all show the landfill and geology along a fourth section line. The conceptual views (A, B, and C) demonsfrate three potential interpretations of the relationship between leachate and groundwater. Comparison of leachate levels from subsequentiy installed gas weUs (summarized on the attached table) will be integrated into these cross sections during preparation of the Additional Studies and Predesign Report.

You will also want to refer to Tables 4-1 through 4-5 of the Remedial Investigation, which includes general data on leachate and landfill gas quality. As stated in the Predesign and Additional Studies Workplan, changes in the volumes and quality of the leachate and landfiU gas since completion of the RI/FS, and ROD may have significantiy reduced the mass flux of contaminants to groundwater.

One Science Court P.O. Box 5385 Madison, Wisconsin 53705-0385

Tel:608 231 4747 Fax: 608 231 4777

Serving the World's Environmental Needs

allowing significant improvements to groundwater quality. Evaluation of the effect of source control measures is a key objective of the proposed additional studies.

MONITORING WELL DATA

I have also included tables of historic groundwater monitoring results and log-concentration graphs for wells near the landfill that have been regularly sampled (we will be receiving a copy of the WDNR's data base for all wells within the next several weeks). The graphs showing the log of contaminant concentrations over time allow a visual assessment of first-order concentration reductions. The monitoring wells included are: P17S, P20SR, P21S, P22S, P22D, P27S, and P27D.

Several observations suggest the importance of source confrol for groundwater contaminant concentration reductions, including:

• The wells nearest the landfill and downgradient (P21 and P27) show the greatest rates of reduction in contaminant concenfrations, with the shallower wells at both locations showing the highest rates.

• Well P17, located adjacent to the landfill on the upgradient side also shows a significant rate of contaminant concenfration reduction, although it is located in lower permeability material, which retards the rate at which the effects of source confrol are realized.

• Wells located sidegradient (P20) or at some distance downgradient (P22) have been essentially unaffected by source control measures as evidenced by relatively stable concentrations at these locations.

CLOSING COMMENTS

Please call if you have any questions as you review the enclosed information. We look forward to your comments on the Predesign and Additional Studies Workplan.

Sincerely,

)NTGOMERY WATSOf

)oug. JYoject^Manager

Enclosures: As stated

cc: Diane Marchik, Godfrey & Kahn

DJB/vlr/KJQ J:\MOVE\VALERIE\DISK l\89_REINE.DOC 1242161.01258001-MD

Ms. Beth Reiner July 22. 1997 U.S. EPA Region 5 Page 2

INFORMATION ON EXISTING SOURCE CONTROLS

Drawing B3 - Leachate and Gas Extraction Well and Gas Probe Locations, Montgomery Watson, 1997

Drawing 15292-Dl - Gas and Leachate Extraction System Layout, Warzyn 1991

Geologic Cross Sections A-A', B-B', and C-C, RMT, 1988

Conceptual Cross Sections A, B, and C, RMT, 1988

Table of Leachate Heads Prior to and Including Extraction System Start-Up

1 I

1 fl

3

3

r Ol 1

in 1

o

1 fl

1 ° c (/

1 " X

u

1

o 1

o i

m

u>

ID

3 o

C

CL 1^ Ol

lO

ID

o 'n n o

•.

—1

°

4A1,00QN

40Q.000N,,

• • * - ' • - • • • - •

, , , . - , , . . . . j

. . . V , , . , . - , . |

. . . . . . . . . . i

S : , . , , . . , , . .

j . . . o , . . - ,

^ * ^ - * ' - • * * '

p . . . . . . . .

• ^ . / . V . .• . V

l . . . , . . , . . j . . . . . . . .

J . . . . . .

LEGEND

REFUSE HIDEAWAY LANDFILL

PROPERTT BOUNDARY

— — FILL UMITS

GW13..+, EXISTING LEACHATE/GAS •$- EXTRACTION WELL LOCATION

AND NUMBER PROPOSED FOR SAMPLING

G - 4 ^ GAS PROBE LOCATION AND ^ NUMBER C ^ SERIES)

PROPOSED FOR SAMPLING

Q-?.^. GAS PROBE LOCATION AND ^ NUMBER C G " SERIES)

(NOT SAMPLED)

G P - 2 3 ^ GAS PROBE LOCATION AND '«' NUMBER CGP" SERIES)

PROPOSED FOR SAMPLING

^ ^ - t l . * ^ GAS PROBE LOCATION AND ** NUMBER CGP" SERIES)

(NOT SAMPLED) , y ^ -

WETLANDS

CREEK OR INTERMITTENT STREAM

NOTE

BASE MAP DEVELOPED FROM GAS PROBE AND LEACHATE/GAS EXTRACTION WELL LOCATION PLAN FOR REFUSE HIDEAWAY LANDFILL. PREPARED BY HYDRO-SEARCH. INC., DATED MARCH 21 , 1994.

north 0 200 400

' n n SCALE IN FEET

CO u UJ t/) Q 3 Ld u . DC 1x1 Q . K

O t Q

9 2

Drawing Number

1242161 01120201 B 3

MONTGOMERY WATSON

o

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U

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SDMS. . Specify Type of Document(s) / Comments:

WARZYN Gas & Leachate Extraction System Layout: Construction Observation Report

Document is available at the EPA Region 5 Records Center. Specify Type of Document(s) / Comments: °i

SDMS US EPA Region V Imagery Insert Form

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Some images in this document may be illegible or unavailable in SDMS. Please see reason(s) indicated below:

Illegible due to bad source documents. Image(s) in SDMS is equivalent to hard copy. Specify Type of Document(s) / Comments:

D

Includes COLOR or RESOLUTION variations. Unless otherwise noted, these pages are available in monochrome. The source document page(s) is more legible than the images. The original document is available for viewing at the Superfund Records Center.

Specify Type of Document(s) / Comments:

I I Confidential Business Information (CBI). This document contains highly sensitive information. Due to confidentiality, materials with such information are not available in SDMS. You may contact the EPA Superfijnd Records Manager if you wish to view this document.

Specify Type of Document(s) / Comments:

E Unscarmable Material: Oversized or x Format. Due to certain scanning equipment capability limitations, the document page(s) is not available in

SDMS.. Specify Type of Document(s) / Comments:

WARZYN Conceptual Cross-secfions A.B.C

D Document is available at the EPA Region 5 Records Center. Specify Type of Document(s) / Comments:

1

Leachate Head Monitoring Table Prior to and Including Extraction System Startup

Refuse Hideaway Landfill 4 ,t*

Well Riser

GWl - EAST - WEST

GW2 - EAST - WEST

GW3 - EAST - WEST

GW4* - EAST - WEST

GW5* - EAST - WEST

GW6 - EAST - WEST

GW7* - EAST - WEST

GW8P* - EAST - WEST

GW9P* - EAST - WEST

GWIO - EAST - WEST

GWllP* -EAST - WEST

GWl2* - EAST - WEST

GW13* - EAST - WEST

Total Depth

53.3

51.7

57.0

65.0

70.0

36.0

60.0

69.0

66.0

70.0

65.0

81.0

69.0

Leachate Head (ft) ' | im2/90

<0.3 0.7

2.9 2.8

2.7 3.0

<0.3 <0.3

1.9 1.7

<0.3 <0.3

0.6 0.6

19.6 :a9.4 •;:

12.6

0.7 0.7

<0.3 <0.3

0.6 0.7

11/21/90

NA

NA

1.5

3.1

2.0

<1.0

<1.0

18.2

17.0 .

<1.0

^ ' ""22.2

<1.0

<1.0

4/16/91

0.3 0.8

3.2 3.1

1.9

3.3

2.8

0.5

1.0

11.7

0.9

0.9

1^5 ""~~

AA

2.8

7/8/91

0.6 1.0

3.0 3.0

2.0 2.2

0.9 0.6

2.8 NA

<0.3 <0.3

NA 1.1

• 18.1,

| | F 17.7

2.4 2.2

26.9

NA 5.0

3.4 3.3

8/15/91

0.6 1.0

2.9 3.0

2.0 2.2

1.0 0.6

3.3 NA

<0.3 <0.3

NA <0.3

17.9 17.8

NA 2.4

2.7 2.5

4.2 4.2

NA 5.8

3.7 3.7 1

* Currently fitted with a pneumatic leachate pump.

General Notes:

1. Leachate heads greater than 10 ft are shaded. 2. Leachate extraction system started August 13,1991. 3. Leachate head measured directly in well risers GW3 through GW13 on November 21, 1990 and

April 16, 1991; otherwise leachate head measured in 1-in. risers located at each wellhead. 4. NA = Leachate head measurement not available due to unidentified blockage in 1-in. riser pipe.

KJQ/vlr/RJR J:\1242\161\01\WP\TBLNS>9_HEAD.DOC 1242161.01120101-MD

MONITORING WELL DATA

1 Constituents

iBenzene Bromodichloromethane Bromoform Bromomethane Chloroform Chloromethane Dibromomethane Chi oroe thane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1 -Dichloroethane 1,2-Dichloroethane cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene p-Isopropyltoluene n-Butylbenzene tert-Butylbenzene

Total VOCs

Jul-87

11 8.2

3.8

1.1

23

NA 62

4.1

190 1.2 4.6 79 2.5 6.5

NS NS

397

Aug-87

33

NA 140

5

74 190

120

20

NS NS

582

Aug-88

7.7

5.4

3.6

38 6.5 NA 320

3 12 2.5 14 99 7.4 9.1 320 2.7 31

NS NS

881.9

Sep-88

10

6.3

2.9

56 4.8 NA 440 1.2 13 2.5 6.3 81 11 4.9 320 1.9 35 10 NS NS

1006.8

Jan-91

7

36

6

21 5

NA 3

10 47

14 17 5

28

68 36 NS NS

303

Jun-91

4

3

6 15 26 9

NA 2

14 12 1 18 5 5 51 28 57 7

NS NS

263

Oct-91

NA

12

16

65

NS NS

93

May-92

4

5 1

20 4

420 2

15 10

15 4

47 12 27 6

NS NS

592

Oct-92

3

1.6

7.6 2.7 23 5.7

1900 1.4

17 6.3

18 2.9 0.9 54 16 24 4.2 NS NS

2088.3

May-93

3

5 6 22 4

150 2

13 5

20 7 2

160

25 7

NS NS

431

Oct-93

2

4 2 11 3

350

9 3

14 2

49 5 10 1

NS NS

465

May-94

2.3

3.9 0.9 10.2 2.3 177 0.9

6.7 4.1

9.4 2.3

18.4

10 1.5 0.9 1.8

252.6

Oct-94

1.8

0.4 9.6

4.3 1.4 11.9 3.2 357 0.7

9.6 0.7

10 1.4

20.2 0.5 8.6 1.2 0.8 0.8 0.9 0.6 0.8

446.4

May-95

1.4

4.6

105.4

5.1 2.3

13 1.8

20

0.5 0.6

154.7

Nov-95

1

0.39

4.4 0.41 8.2 1.8 110 0.42

4.2 1.1

13 1.2

22

0.92 3.7 1.1

0.48 0.44

174.76

May-96

0.7

0.52

3.2 0.73

6 1.4 92

0.34

3.6 0.7

9.2 0.68

17

4.4

0.41

140.88

Nov-96

0.68

0.18

2.8 0.68 6.2 1.1 83

0.33

3.3 0.6

9 0.44

14

4.1 0.45 0.28 0.22

127.36

J.M 242M 6 l\waterq\P 17S.XLS

P17S Water Quality 10000

1000 - -

e o

w <J a o U

100 --

10 --

Final Cover Completed

Gas & Leachate System Start-up

1 -r

Jul-85

-Total VOCs

- Tetrachloroethene

•Trichloroethene

NR140 ES = 5 ppb ^ NRHO PAL = 0.5 ppb

Apr-88 Jan-91 Oct-93

Date

Jul-96 Apr-99 Jan-02

Summary of Analytical Results for P20SR

Constituents Benzene Bromodichloromethane Bromoform Bromomethane Chloroform Chloromethane Dibromomethane Chloroe thane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1-Dichloroethane 1,2-Dichl oroe thane cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,1-Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Napthalene Toluene 1,1,1-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene p-lsopropyltoluene In-Butylbenzene In-Propylbenzene |tert-Butylbenzene

iTotal VOCs

Dec-90

NA

3

3

Jan-91

NA

2

2

Jul-91

6

NA

3

9

Nov-91

NA

1

7

4

12

May-92

NA

6

6

Dec-92

2

6

8

May-93

1

1

3

5

Oct-93

8

8

May-94

2.1

1.3 3.6 6

0.8 0.7

2.5

0.8

0.7 1.3 19.8

Oct-94

3.9

0.4

4.8

0.6

0.8 0.4

0.5

11.4

May-95

3.51

3.51

Nov-95

0.05

0.73 0.025

0.21

4 0.072 0.025

0.24 0.14

0.067

0.092

5.651

May-96

0.034

0.81 0.025

0.13

3.2

0.021

0.17 0.16

4.55

Nov-96

0.027

0.87 0.047

0.24

3.9

0.052

0.22 0.18

5.536

j:\1242M61\01\waterq\P20SR.XLS

P20SR Water Quality 100

Final Cover Completed

•Total VOCs

• Tetrachloroethene

•Trichloroethene

10 --

a

a w u a o

1 --

Gas & Leachate System Start-up

V 0.1 — \ —

J u n - 8 9

\

Jun-93

Date

\ Jun-95

\ Jun-99 Jul-85 Jul-87 Jun-91 Jun-97 Jun-01

Summary of Analytical Results forP21S

Constituents

Benzene Bromodichloromethane Bromoform Bromomethane Chloroform Chloroethane Chloromethane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1-Dichloroethane 1,2-Dichloroethane cis-l,2-Dichloroethene trans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1 -Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes 1,2.4-Trimethvlbenzene 1,3,5-Trimethylbenzene Isopropylbenzene

Total VOCs

Jun-87

4.8

NA

36

40.8

Aus-87

NA

1.6

57

58.6

Aug-87

NA

43

43

Dec-87

NA

3

24

27

Aus-88

0.7

NA 2.5 0.7

4.4

0.77

42

51.07

Sep-88

I.I

NA 3.5

4.2

0.61

31

40.41

Jan-91

9

11

25 40

NA 12

3

1 3 4

7 177 525 2

819

Jun-91

7

8

90 36 4

NA 14 1 2

3 4 1

6 190 470

I

837

Nov-91

37

72

NA 25

134

May-92

4

2

1 18

NA 6

2

5 48 56

142

Nov-92

4

10 16

1

6

41

78

May-93

3

3

50

17 10

25 5

9

122

Oct-93

3

2

8

4

4

5

26

May-94

4.3

2.9

16.9 7.9

19.9 4.6

1.4

1.7

6.2

4.3 2.6

72.7

Oct-94

4

0.9 6

5.5

18.1 3.2

0.4 0.5

4.4

4.9 0.9

0.6

49.4

Nov-95

2.3

1.6 0.036

0.091 5.7

9.6 2.8

0.1

0.054 0.17 0.044

2.2

4.4 0.097 0.044

0.092

29.328

May-96

0.32

0.049

0.083

4.4 0.4

0.035 0.12 0.034

0.41

0.95

0.038

6.839

Nov-96

1.4

0.028 0.8

3.9

14

1.8 1 0.034 0.079

0.076

1.9

3

0.061

27.078

J:\1242M61\0 l\wate«iM^lS.XLS

1000 1

a o. a ,2 n ki *̂ a V u a o U

P21S Water Quality

inms 4/24/88 1/19/91 10/15/93

Date

7/11/96 4/7/99 1/1/02

lary lytii ults

Constituents

Benzene Bromodichloromethane Bromoform Bromomethane Dibromomethane Chloroform Chloroethane Chloromethane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1-Dichloroethane 1,2-Dichloroethane cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes

Total VOCs

Aug-88

0.7

NA 10

0.51

8

0.61 2.6

0.61

23.03

Sep-88

1

NA 12

9.3

1.2 3.2

0.73 0.68

28.11

Jan-91

4 14

NA

9

2

29

Jun-91

46

NA

1 8

2 3

60

Oct-91

1

NA

12

3 4

20

May-92

1

1

14 2

NA

2 12

4 . 1

37

Oct-92

12

12

17 2.4

43.4

May-93

3

9

7

2

21

Oct-93

6

2

8

May-94

2.1

6.6

0.9

7.1

2.3

19

Oct-94

0.5

0.6

2.4

8.8

0.5

8.8 0.6

3.1 0.9

26.2

May-95

8.3

9.3

3.4

21

Nov-95

0.022

1.6 0.9

0.065 8.2

0.061

0.2

0.065 9.2

0.19 2.8

0.31 0.041

23.654

May-96

0.03

0.038

0.047

1.5 0.8

0.058 8.1

0.054

0.21

0.05 8.1

0.059 0.15 2.8 0.45

0.046

22.492

Nov-96

0.037

1.8 0.69

0.058 7.2

0.042

0.18

0.052 6.7

0.035 0.13 2.2

0.45

19.574 1

J:\l 242\161\01\waterq\P22S.XLS

a.

a e _o

' • ^ * a e u e e U

P22S Water Quality

Jul-85 Jul-87 Jun-89 Jun-91 Jun-93

Date

Jun-95 Jun-97 Jun-99 Jun-01

liary iytii ults D

Constituents

Benzene Bromodichloromethane Bromoform Bromomethane Dibromomethane Chloroform Chloroethane Chloromethane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1 -Dichloroethane 1,2-Dichloroethane cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1 -Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene

Total VOCs

Aug-88

61

1.1

NA 14 0.6

12

0.77 3.3

0.66

93.43

Sep-88

0.96

NA 12

8.8

0.56 2.8

0.64 0.57

26.33

Jan-91

7

NA

6

1

14

Jun-91

39

NA

6

1 3

49

Oct-91

NA

8

2

10

May-92

7 1

NA

1 7

3

19

Oct-92

1.6

8.1

8

1.4

19.1

May-93

2

7

5

14

Oct-93

2

8

2 2

14

May-94

1.5

7.3

1

7.1

2.4

19.3

Oct-94

0.5

0.6

1.5 0.4

8.5

0.5

7.7 0.7

2.7 0.6

23.7

May-95

4.6

6.8

2.2

13.6

Nov-95

1.1 0.66 0.06

7 0.042

0.16

0.072 7.9 0.13 0.12 2.1

0.28 0.032

19.656

May-96

0.041

1.3 0.61 0.054

7.4 0.039

0.14

0.069 7.2

0.093 2

0.27

19.216

Nov-96

0.036

1.2 0.58 0.05

7 0.036

0.15

0.071 5.9

0.036

1.8 0.23

17.089

J:\l 242\16 lM)l\waterq\P22D.XLS

P22D Total VOCs Chart

100 T

B _o ' * # f t B a> u B O

U

10 -

Gas & Leachate System Start-up

•Total VOCs

• Tetrachloroethene

•Trichloroethene

Jul-85 Jul-87 Jun-89 Jun-91 Jun-93

Date

Jun-95 Jun-97 Jun-99 . Jun-01

JHMbry o^^Mvytica^RHlts fc^^^W

11/14/96

Constituents

Benzene Bromodichloromethane Bromoform Bromomethane IChloroform Chloroethane Chloromethane 11,4-Dichlrobenzene Dichlrodifluoromethane 1,1 -Dichloroethane 1,2-Dichloroethane cis-1,2-Dichloroethene trans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1-Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes

Total VOCs

Aug-88

1.8

3.9

NA 12 2.7

4.4 110

4.7 19 9.3 4.1

171.9

Sep-88

0.55

4

NA 12

2.8 110

6.4 19 8.8 4.6

168.15

Jan-91

53 4

NA

1

3 114 1 5 12 37

230

Jun-91

150 5

NA

7 130

6 17 48

363

Oct-91

14 4

NA

2 150

4 21 30

225

May-92

11 3

9

2 120

4 16 19

184

Oct-92

18 1.5

7.1

130

3.3 15

174.9

May-93

7

3

64

1 8 3

86

Oct-93

4 1

50

6 1

62

May-94

2.7 2

2

51.1

1.4 7.2 1.6

68

Oct-94

0.5

0.4

5.3 1.1

2

37.5 0.9 0.8 4.4 2.1

55

May-95

37.1

5.3

42.4

Nov-95

0.1

0.28

1.4 1.4

1.6

0.25

0.18 39 0.1 0.84 5.3

1

51.45

May-96

0.075

0.052

1.7 1.5

1.5

0.23

0.11 32

0.7 4.6 1.1

43.567

Nov-96

0.088

1.3 1.3

0.86 0.27

0.088 25

0.082 0.6 4.2

0.92

34.708

j:\l 242M 61M)l\waterq\P27S.XLS

1000 -r

100

B

U *̂ B a u B e U

P27S Total VOCs Chart

Gas & Leachate System Start-up -Total VOCs

• Tetrachloroethene

- Trichloroethene

Jul-85 Jul-87 Jun-89 Jun-91 Jun-93

Date

Jun-95 Jun-97 Jun-99 Jun-01

JWRHKiry oPHRIIytica^HMIlts fc^^^K)

Constituents

Benzene Bromodichloromethane Bromoform Bromomethane Chloroform Chloroethane Cloromethane Dibromomethane 1,4-Dichlrobenzene Dichlrodifluoromethane 1,1 -Dichloroethane 1,2-Dichloroethane cis-1,2-Dichloroethene bans-1,2-Dichloroethene 1,1 -Dichloroethylene 1,2-Dichloropropane Ethylbezene Methylene Chloride Tetrachloroethene Toluene 1,1,1 -Trichloroethane Trichloroethene Trichlorofluoromethane Vinyl chloride Xylenes

Total VOCs

Aug-88

0.51

NA

0.5

3.7 20

0.52 2.1 2.3

29.63

Sep-88

1

1.8

NA 4.2

0.52

1.4 56

3.2 7.7 8.6 9.6

94.02

Jan-91

93 11

NA 1

99

6 11

221

Jun-91

260 4

NA

2 120

5 14 40

445

Oct-91

16 4

NA

150

4 21 33

228

May-92

16 4

NA

1

130

4 17 21

193

Oct-92

20 1.7

7.1

54

3 15

100.8

May-93

24 1

6

4 72

3 32 7

149

Oct-93

3

4.9

91

2 12 3

115.9

May-94

10.5 3.1

7.6

78.1

2 11.8 3.1

116.2

Oct-94

0.4

0.6 0.7 0.6 18.7

2.9 8.4

0.7

0.5 54.5 0.5 1.7

11.8 4.3

106.3

May-95

2.8

53.1

8.6

64.5

Nov-95

0.19

2.9 2.4

5.8

0.24

0.78 57

1.2 9

1.9 0.22

81.63

May-96

0.21

2.3 2.1

3.8

0.28

0.4 47

0.98 7.6 1.3

65.97

Nov-96

0.43

0.22

2.7 2.2

4

0.078 0.29

0.66 42 0.1

1 7.3 1.7

62.678

J:\1242M61N01\waterq\P27D.XLS

P27D Total VOCs Chart

1000

Landfill Cover Completed

100

a _©

U B W u B O U

10 -

Gas & Leachate System Start-up -Total VOCs

- Tetrachloroethene

-Trichloroethene

1 \ Jun-93

Date

Jul-85 Jul-87 Jun-89 Jun-91 Jun-95 Jun-97 Jun-99 Jun-01