1 S. Wacker Drive, 37th Floor, Chicago, IL 60606

Tel 312.201.7700 Fax 312.201.0031

May 29, 2015

Mr. Thomas Alcamo

Remedial Project Manager

U.S. Environmental Protection Agency Region 5

77 W. Jackson Blvd. (SR-6J)

Chicago, Illinois 60604

Subject: Technical Memorandum

Piezometer Data Review

Neal’s Landfill

CBS Multi-Sites, Monroe County, Indiana

Work Assignment No. 103-TATA-05ZZ

Dear Mr. Alcamo:

As requested by the U.S. Environmental Protection Agency (EPA) to support its Five-Year Review for

the Neal’s Landfill site, SulTRAC and its subcontractor, AECOM Technical Services, Inc. (AECOM),

prepared the enclosed technical memorandum reviewing historical water level data for piezometers at the

site. The review evaluates the degree of potential waste wetting from precipitation or seasonal changes in

groundwater level.

Please call me at (312) 201-7491 if you have any questions or would like to schedule a conference call

with AECOM to discuss the data review.

Sincerely,

Jeffrey Lifka, CHMM

Project Manager

Enclosure

cc: Daniel Olsson, EPA Contracting Officer (letter only)

J.D. Campbell, Ph.D., P.E., SulTRAC Program Manager

Mindy Gould, SulTRAC

John Bassett, LPG, AECOM

ENCLOSURE

TECHNICAL MEMORANDUM

PIEZOMETER DATA REVIEW

NEAL’S LANDFILL

CBS MULTI-SITES

MONROE COUNTY, INDIANA

(Five Pages)

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TECHNICAL MEMORANDUM

PIEZOMETER DATA REVIEW

NEAL’S LANDFILL

CBS MULTI-SITES

MONROE COUNTY, INDIANA

As requested by the U.S. Environmental Protection Agency (EPA) to support its Five-Year Review for

the Neal’s Landfill site, SulTRAC and its subcontractor, AECOM Technical Services, Inc. (AECOM),

prepared this technical memorandum reviewing Neal’s Landfill historical data for water levels in

piezometers for evaluating the degree of potential waste wetting from precipitation or seasonal changes in

groundwater level.

The tables and one figure supporting this memorandum are included in Appendices A and B.

BACKGROUND

Five piezometers (PZ-01 through PZ-05) were installed at Neal’s Landfill through the Resource

Conservation and Recovery Act (RCRA) cap and consolidated waste at the end of the 1999 remediation.

The five piezometers were installed in areas that were observed to be wet during pre-remediation

sampling of landfill materials in 1998. They were further installed for monitoring lateral infiltration of

groundwater beneath the cap and wetting of waste materials from fluctuating groundwater levels. All of

the piezometers are screened across both the interfaces between the natural soil and landfill soil and the

natural soil and bedrock. Single piezometers were used at Neal’s Landfill, in part, because the natural soil

zone is thin (generally, only about 3 feet) between the waste deposits and the bedrock.

Table 1 in Appendix A was compiled to relate water level data to the waste interface elevations at each

piezometer location. Details of the piezometer construction, compiled from original boring and

piezometer installation records, as-built surveys, and Viacom, Inc. (Viacom, now known as CBS

Corporation [CBS]) (2004) are provided in the table. There are problems with identifying the waste

interface elevation because there is no good information on the waste elevation from the original

piezometer boring logs and installation records. Records are not good because the ground surface

elevation was not established when the piezometers were installed. As a result, the most effective way to

calculate the waste interface elevation is to establish the piezometer bottom elevation and then use the

boring log and piezometer completion records to identify the location of the interface above the

piezometer bottom. These calculations are shown in Table 1 and are explained below.

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In late 1999, the piezometers were installed through the landfill cap before approximately 3 feet of

vegetative support zone soil was put in place. The ground surface elevation data provided in Column 1 of

Table 1 were obtained in 1999 after the vegetative support zone material had been placed. The depth to

the bottom of each piezometer (DTB) was measured relative to the ground surface on November 23, 1999

(Neill Vaughn, PSARA Technologies, Inc. [PSARA], 2015). Figure 9 of Viacom (2000) reports both the

flush-mount pad surface elevation and the top of casing elevation. These elevations are shown in

Columns 1 and 2 of Table 1. However, Figure 9 of Viacom (2000) appears to incorrectly calculate the

piezometer bottom elevation by subtracting the DTB measurement from the top of casing elevation rather

than the flush-mount pad surface elevation that served as the datum for the DTB measurements. The

corrected piezometer bottom elevations based on the flush-mount pad surface elevations are shown in

Column 4 of Table 1.

On February 20 and 21, 2001 each piezometer device at Neal’s Landfill was converted from a flush-

mount installation to an above-grade “stick up” installation by adding casing and an above-grade

protective cover. A new survey and DTB measurements relative to the top of casing were conducted to

document these changes on July 17, 2001. These data were provided in Figure 17 of Viacom (2004) and

are shown in Table 1, Columns 5, 6, and 7. The “new” piezometer bottom elevations shown in Column 7

agree closely with the elevations calculated in 1999, with the largest difference being 0.22 foot at

Piezometer PZ-05 (see Table 1, Column 8).

Piezometer PZ-01 is currently monitored by direct water-level measurement. Piezometers PZ-02 through

PZ-05 are monitored by making periodic measurements of the maximum recorded water level depth

relative to the piezometer bottom elevation. These data are recorded by crest gages that record the

maximum water level depth above the piezometer bottom over a given period of time. In essence, the

gages provide a continuous record of the maximum water level that occurs between measurement events,

but no information concerning the frequency that such wetting occurs. These crest gage data are recorded

and reported to EPA as apparent movement and are listed in Table 2 in Appendix A. These data have

generally been reported in inches in the various quarterly monitoring reports and have been converted to

feet for this analysis. The latest available data (through the first quarter of 2014) were used for this

analysis (CBS 2015).

Refer to the data collected on September 10, 2012, as an example of how the apparent movement data in

Table 2 are interpreted. These data indicate that the maximum water level depth that occurred in

Piezometer PZ-02 between September 10 and the preceding May 2 observation was 0.14 foot, as

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measured from the piezometer bottom. After this measurement, the crest gage is reset in preparation for

the next monthly measurement.

ANALYSIS

One way to interpret the piezometer data is to determine the depth or elevation of the water column in the

piezometer (by crest gage, or direct measurement) and compare this value to a critical depth or elevation

necessary to cause saturation of the waste material. Any measured water in the piezometer could be

interpreted to indicate groundwater movement along the monitored interface if it is assumed that the

piezometer bottom functions as a sump to trap and store the water. However, it could also be interpreted

that there is not significant movement unless the value exceeds a critical depth or elevation related to the

saturation of the waste material, thereby indicating a more widespread and general waste saturation

hydrologic condition. This later approach is used in the analysis presented below. The critical depth

(water level rise above the piezometer bottom) related to saturation of the base of waste is listed in

Table 1 (Column 10) in Appendix A and is shown at the top of Table 2 for each piezometer. The

corresponding critical elevations, obtained by adding Column 10 to Column 7, are shown in Column 11

in Table 1.

Piezometer PZ-01 has been monitored using both continuous water level measurements and hand tape-

down measurements, but a crest gage has not been installed. Piezometer PZ-01 was logged continuously

from March 7, 2000, until November 2, 2000, and from February 2001, until June 14, 2003. Hand

measurements have generally been collected on a monthly or bimonthly basis since February 2001. Hand

measurement data collected since September 2003 are provided in Table 3 in Appendix A.

Piezometer PZ-01 has historically shown water accumulation. Instrumental and hand measurements both

indicated consistent water levels above the critical elevation of 772.9 feet above mean sea level (amsl)

prior to 2002. Figure 1 in Appendix B shows the water levels measured in piezometer PZ-01 since

September 2003, as reported in CBS’s most recent routine site quarterly monitoring reports (CBS 2015).

The plot shows steadily declining water levels until July 2010, when piezometer PZ-01 went dry. In the

fall of 2011, water was again observed in the piezometer and remained until September 2013 (CBS 2015).

Since that time, the last five measurements reported to EPA indicate a return to a dry condition. A

prominent spike in water level was recorded in November 2012, but the water level elevation did not

exceed the critical value. None of the hand measurements shown in Figure 1 has indicated a saturated

waste condition.

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Piezometer PZ-02 has shown isolated water accumulations throughout the monitoring history, but none of

the apparent movement values have exceeded the critical value indicating waste saturation (see Table 2).

Piezometer PZ-03 showed water accumulation early in its monitoring history; however, since November

2002, there has been only one small response at Piezometer PZ-03, in February 2012. None of the water

level responses has indicated a saturated waste condition.

Piezometer PZ-04 has shown only one water level reaction since 2005. The apparent movement value

recorded on September 10, 2012 (0.24 foot), was well below the critical value that would indicate waste

saturation for that device.

Prior to January 2012, Piezometer PZ-05 was dry throughout its early monitoring history, with only two

exceptions. There were two small crest gage movements of 0.36 foot and 0.08 foot in early 2005 (see

Table 2 in Appendix A). These movements were well below the critical value for waste saturation of

5.6 feet. An observation on January 11, 2013, indicated no water. Rain totaling 3.71 inches fell on

January 11-13, 2013, and a piezometer check on January 23 found 2.58 feet of water. Since then,

additional direct water level observations through the last measurements submitted to EPA (May 2014)

have consistently shown 2.1 to 3.7 feet of water (CBS 2015). From January 2013 to May 2014, there

have been 15 consecutive direct water level measurements indicating that water is present in the

piezometer (Table 2), but again, these measurements were all lower than the critical value. Neill Vaughn

(PSARA 2015) indicates that water levels at PZ-05 had declined to about 0.7 foot in January 2015.

CBS suspected that the boot seal may have failed where the PZ-01 piezometer casing passes through the

landfill geomembrane. CBS tested for this condition on March 14, 2013. During the test, the surface

around Piezometer PZ-05 was saturated with 250 gallons of water. The water level in the piezometer was

observed for 2 hours, but no change in water level was observed (CBS 2013). Therefore, there was no

indication from the test that the geomembrane seal had failed, and the unusual occurrence of water in the

piezometer remains unexplained.

An additional change at Piezometer PZ-05 was noted in 2011, when it was observed that the polyvinyl

chloride (PVC) riser was deforming from the vertical (CBS 2013). This deformation necessitated

shortening the crest gage stick in order for it to pass through the deformed area. CBS has further noted

that the casing deformation in Piezometer PZ-05 and the unusual occurrences of water both occurred at

the time that significant ground movement associated with blasting operations at the adjacent Rogers

Group, Inc., (Rogers) Bloomington Crushed Stone quarry was noted.

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SUMMARY

The recent and unusual occurrences of water in Piezometers PZ-01 and PZ-05 remain unexplained.

Although none of the direct water level measurement data suggest that wetting of the waste materials has

occurred at either location, the presence of such occurrences at two different devices and the potential

association with ongoing Rogers’ stone quarry blasting operations warrant additional investigation.

Moreover, it is not clear from the recent data whether water levels in either Piezometer PZ-01 or PZ-05

are responding to rainfall events. An element of this investigation should therefore entail collection of

continuous water level records at these piezometers to determine the magnitude of rainfall response over

the course of several storm events and during the wet season of the year.

REFERENCES

CBS Corporation (CBS). 2013. Surface Water, Flow and Water Level Monitoring, First Quarter 2013,

Neal’s Landfill, Bloomington, Monroe County, Indiana, November 15.

CBS. 2015. Surface Water, Flow and Water Level Monitoring, First Quarter 2014, Neal’s Landfill,

Bloomington, Monroe County, Indiana, February 17.

PSARA Technologies, Inc. (PSARA). 2015. E-mail communication from Neill Vaughn, March 13.

Viacom, Inc. (Viacom). 2000. Remediation of Neal’s Landfill, Bloomington, Indiana, Monroe County,

355 p., December.

Viacom. 2004. Final Report for the Groundwater Investigation at. Neal’s Landfill, Quality Assurance

Project Plan (QAPjP) Volume XXX, July.

APPENDIX A

TABLES

(Six Sheets)

Table 1Neal's Landfill

Piezometer Construction Details

1 2 3 4 5 6 7 8 9 10 11 12 13 14

OriginalGroundSurface

Elevation2

(ft AMSL)

Riser TopElevation2

(ft AMSL)

DTB(Ground)

(ft)

BottomElevation(ft AMSL)(1) - (3)

Riser TopElevation3

(ft AMSL)

DTB(Riser)

(ft)

BottomElevation3

(ft AMSL)(5) - (6)

NL PZ-01 3078256 1427724 798.39 797.94 27.99 770.40 800.63 30.23 770.40 0.00 Waste / Soil 2.5 772.9 - 772.8 11/7/2012NL PZ-02 3077999 1427731 795.06 794.59 13.88 781.18 797.17 16.01 781.16 -0.02 Waste / Bdrk 0.5 781.7 0.42 781.6 5/2/2006NL PZ-03 3078111 1427249 817.50 816.99 16.75 800.75 819.53 18.84 800.69 -0.06 Waste / Soil 3.0 803.7 0.41 801.1 10/25/2001NL PZ-04 3078530 1427169 791.38 790.91 30.35 761.03 793.46 32.45 761.01 -0.02 Waste / Soil 2.5 763.5 0.37 761.4 3/25/2005NL PZ-05 3078554 1427742 820.17 819.50 25.18 794.99 822.19 27.42 794.77 -0.22 Waste / Soil 5.6 800.4 3.73 798.5 5/23/2013

Notes:(1) Coordinates in US Survey Feet, NAD 83.(2) SNA (Nov 1999), Neal's Landfill As-Built Subsurface Features.(3) CBS (Jul 2004), Final Report for Groundwater Investigation at Neal' Landfill, Figure 17.(4) Original 1999 Boring LogDTB depth to bottomft feetft (AMSL) feet above mean sea level

InterfaceType

1999 SNA Survey 2001 Modification and Re-Survey

Site Number

State Plane

Easting (ft)1

State Plane

Northing (ft)1

BottomElevationDifference

(1999-2001)

Water LevelRise

Neededto Wet

Interface4

(ft)

BaseWaste /BedrockElevation(ft AMSL)(7) + (10)

MaxRecorded

WaterLevelRise(ft)

MaxWaterLevelRise

(ft AMSL)MaxDate

PZ-02 PZ-03 PZ-04 PZ-05

Critical Value (6) 0.5 3.0 2.5 5.65/22/2014 0.18 0 0 2.734/4/2014 0 0 0 2.10

2/21/2014 0.2 0 0 2.2012/27/2013 0 0 0 2.2111/21/2013 0 0 0 2.6910/7/2013 0 0 0 2.989/3/2013 0 0 0 3.208/2/2013 0 0 0 3.44

6/27/2013 0 0 0 3.675/23/2013 0.08 0 0 3.733/28/2013 0 0 0 3.683/11/2013 0 0 0 3.422/28/2013 0 0 0 3.521/28/2013 - - 0 2.551/23/2013 0 0 0 2.581/11/2013 0 0 0 012/5/2012 0 0 0 011/7/2012 0 0 0 0

10/12/2012 0 0 0 09/28/2012 0 0 0 0

DateApparent Movement (ft)

Table 2Neal's Landfill Piezometer

Piezometer Crest Gage Measurements2003 - Current

9/10/2012 0.14 0 0.24 0.225/2/2012 0 0 0 04/9/2012 0 0 0 0

2/22/2012 0.17 0.13 0 0.421/18/2012 0 0 0 01/16/2012 0.17 0 0 012/5/2011 0 0 0 0

11/23/2011 0 0 0 011/15/2011 0.17 0 0 010/28/2011 0 0 0 09/26/2011 0 0 0 09/14/2011 0 0 0 06/16/2011 0 0 0 02/17/2011 0 0 0 0

11/10/2010 0 0 0 07/8/2010 0 0 0 0

2/11/2010 0 0 0 010/22/2009 0 0 0 08/25/2009 0.22 0 0 05/31/2009 0.22 0 0 02/18/2009 0.22 0 0 0

11/13/2008 0 0 0 010/22/2008 0 0 0 09/10/2008 0 0 0 08/1/2008 0 0 0 0

PZ-02 PZ-03 PZ-04 PZ-05

Critical Value (6) 0.5 3.0 2.5 5.6

DateApparent Movement (ft)

Table 2Neal's Landfill Piezometer

Piezometer Crest Gage Measurements2003 - Current

7/18/2008 0 0 0 06/25/2008 0 0 0 06/6/2008 0 0 0 0

5/20/2008 0 0 0 04/30/2008 0 0 0 04/9/2008 0.17 0 0 0

2/13/2008 0 0 0 08/27/2007 0 0 0 08/3/2007 0 0 0 07/5/2007 0 0 0 0

6/25/2007 0 0 0 05/31/2007 0 0 0 05/8/2007 0 0 0 0

4/20/2007 0 0 0 03/23/2007 0 0 0 03/10/2007 0 0 0 02/19/2007 0 0 0 02/8/2007 0 0 0 0

1/18/2007 0 0 0 01/2/2007 0 0 0 0

11/8/2006 0 0 0 09/28/2006 0 0 0 09/13/2006 0 0 0 08/22/2006 0 0 0 08/3/2006 0 0 0 0

7/25/2006 0 0 0 07/11/2006 0 0 0 06/12/2006 0 0 0 05/18/2006 0 0 0 05/2/2006 0.42 0 0 04/3/2006 0 0 0 0

3/10/2006 0 0 0 02/28/2006 0 0 0 02/15/2006 0 0 0 02/1/2006 0 0 0 0

1/16/2006 0 0 0 01/5/2006 0 0 0 0

12/20/2005 0 0 0 011/2/2005 0 0 0 0

10/11/2005 0.20 0 0 09/19/2005 0 0 0 08/31/2005 0 0 0 08/8/2005 0 0 0 0

7/19/2005 0 0 0 06/22/2005 0 0 0 05/12/2005 0 0 0 0

PZ-02 PZ-03 PZ-04 PZ-05

Critical Value (6) 0.5 3.0 2.5 5.6

DateApparent Movement (ft)

Table 2Neal's Landfill Piezometer

Piezometer Crest Gage Measurements2003 - Current

5/3/2005 0 0 0 04/13/2005 0 0 0 0.363/25/2005 (3) 0 0.37 NR(4)

2/18/2005 0 0 0 02/3/2005 0 0 0 0.08

12/7/2004 0 0 0 011/22/2004 0 0 0 010/26/2004 0 0 0 010/7/2004 0 0 0 09/23/2004 0 0 0 09/10/2004 0 0 0 08/31/2004 0 0 0 08/11/2004 0 0 0 08/3/2004 0 0 0 0

7/13/2004 0 0 0 06/25/2004 0 0 0 06/15/2004 0 0 0 05/25/2004 0 0 0 05/10/2004 0 0 0 04/22/2004 0 0 0 04/13/2004 0 0 0 03/25/2004 0 0 0 03/11/2004 0 0 0 02/26/2004 0 0 0 02/12/2004 0 0 0 01/29/2004 0 0 0 01/15/2004 0 0 0 0

12/31/2003 0 0 0 012/8/2003 0 0 0 0

11/20/2003 0 0 0 011/5/2003 0 0 0 0

10/23/2003 0 0 0 010/9/2003 0 0 0 09/29/2003 0 0 0 09/11/2003 0 0 0 08/29/2003 0 0 0 08/15/2003 0 0 0 08/1/2003 0 0 0 0

7/17/2003 0 0 0 07/3/2003 0 0 0 0

6/19/2003 0 0 0 06/6/2003 0 0 0 0

5/19/2003 0 0 0 05/8/2003 0 0 0 0

4/23/2003 0 0 0 04/7/2003 0 0 0 0

PZ-02 PZ-03 PZ-04 PZ-05

Critical Value (6) 0.5 3.0 2.5 5.6

DateApparent Movement (ft)

Table 2Neal's Landfill Piezometer

Piezometer Crest Gage Measurements2003 - Current

3/19/2003 0 0 0 03/6/2003 0 0 0 0

2/20/2003 0 0 0 02/11/2003 0 0 0 01/28/2003 0 0 0 01/13/2003 0 0 0 0

12/30/2002 0 0 0 012/13/2002 0 0 0 012/2/2002 0 0 0 0

11/14/2002 0 (1) 0 010/31/2002 0 (1) 0 010/17/2002 0 (1) 0 010/3/2002 0 (1) 0 09/19/2002 0 (1) 0 09/9/2002 0 (1) 0 0

8/22/2002 0 (1) 0 08/9/2002 0 0.05 0 0

7/26/2002 0 0.03 0 07/11/2002 0 0.17 0 06/27/2002 0 0.02 0 06/14/2002 0 0.05 (2) 05/31/2002 0 0.04 0 05/16/2002 0 0.06 0 05/3/2002 0 0.15 0 0

4/18/2002 0 0.21 0 04/4/2002 0 0 0 0

3/21/2002 0 0.27 0 03/8/2002 0 0.17 0 02/8/2002 0 0.15 0 0

1/25/2002 0 0.35 0 01/9/2002 0 0.40 0 0

10/25/2001 0 0.41 0 010/9/2001 0 0.22 0 09/21/2001 0 0.22 0 09/7/2001 0 0.27 0 0

8/28/2001 0 0 Reinstalled Reinstalled6/14/2001 0 0.06 0 0

Notes:(1) Crest gage removed from piezometer; miniTroll instrument installed.(2) No measurement possible due to jammed lock on piezometer.

(4) No record.(5) Measured water column.(6) Depth of water indicating saturation of waste materials.

chalk line. Dampness most likely caused by condensation of well humidity, not an actual piezometric rise.(3) Gage became damp, then dried prior to inspection in such a manner as to produce an inconclusive

Critical Elevation = 772.9 ft AMSL

DateWater

Elevation(ft AMSL)

DateWater

Elevation(ft AMSL)

DateWater

Elevation(ft AMSL)

09/29/2003 772.53 01/05/2006 772.22 05/31/2009 771.3610/09/2003 772.55 01/16/2006 772.17 08/25/2009 771.2811/05/2003 772.58 02/15/2006 772.14 10/22/2009 771.2111/20/2003 772.64 02/28/2006 772.12 02/11/2010 771.2512/08/2003 772.61 03/10/2006 772.14 07/08/2010 770.4001/15/2004 772.55 03/29/2006 772.08 11/10/2010 770.4001/29/2004 772.52 05/02/2006 772.10 02/17/2011 770.4002/12/2004 772.50 05/18/2006 772.14 06/16/2011 770.4002/26/2004 772.53 06/12/2006 772.07 09/14/2011 770.9403/11/2004 772.55 07/11/2006 771.99 09/26/2011 770.9103/25/2004 772.47 07/25/2006 771.69 10/28/2011 770.9204/13/2004 772.55 08/03/2006 771.97 11/23/2011 770.9204/22/2004 772.50 08/22/2006 771.94 12/05/2011 770.9005/10/2004 772.38 09/13/2006 771.92 12/21/2011 770.9205/25/2004 772.41 11/08/2006 771.92 01/18/2012 770.9206/15/2004 772.39 01/02/2007 771.90 02/22/2012 770.9306/25/2004 772.38 01/18/2007 771.90 04/09/2012 770.9207/13/2004 772.42 02/08/2007 771.84 05/02/2012 770.9308/03/2004 772.42 02/19/2007 771.90 07/16/2012 770.8008/11/2004 772.39 03/10/2007 772.00 09/10/2012 770.4208/31/2004 772.34 03/23/2007 771.98 09/28/2012 770.8009/10/2004 772.30 04/20/2007 771.99 10/12/2012 770.7809/23/2004 772.25 05/08/2007 772.00 11/07/2012 772.8310/07/2004 772.22 05/31/2007 771.96 12/05/2012 770.9110/26/2004 772.28 06/12/2007 771.96 01/23/2013 770.9211/22/2004 772.27 06/26/2007 771.94 02/28/2013 770.8412/07/2004 772.40 08/04/2007 771.86 03/28/2013 770.8102/03/2005 772.21 08/27/2007 771.84 05/23/2013 770.7502/18/2005 772.27 02/13/2008 771.82 06/27/2013 770.7304/13/2005 772.35 04/09/2008 771.75 08/02/2013 770.6905/03/2005 772.19 04/30/2008 771.83 09/03/2013 770.4005/12/2005 771.58 05/20/2008 771.77 10/07/2013 770.4007/19/2005 772.03 06/06/2008 771.78 11/21/2013 770.4008/08/2005 772.03 07/18/2008 772.01 12/27/2013 770.4008/31/2005 772.09 08/01/2008 771.96 02/21/2014 770.4009/19/2005 772.06 09/10/2008 771.95 - -10/11/2005 772.03 10/22/2008 771.93 - -11/02/2005 772.04 11/13/2008 771.54 - -12/20/2005 772.05 02/18/2009 771.54 - -

Notes:

ft = feetft AMSL = feet above mean sea level

Table 3Neal's Landfill Piezometer PZ-01Hand Water Level Measurements

2003 - Current

A dry piezometer is reported as elevation 770.40 ft AMSL (the piezometer bottom elevation).

APPENDIX B

FIGURE

(One Sheet)

771.50

772.00

772.50

773.00

Water Level (ft A

MSL)

Figure 1. Water Level Measurements at Neal's Landfill Piezometer PZ-01

Critical Value = 772.9 ft AMSL

770.00

770.50

771.00

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

W

Date

Water Level Elevation

Piezometer Bottom Elevation - 770.4 ft AMSL

`