WS_88361_95201_CA_FPR_20210525

20213510.001A | RAL21L126135 Page 1 of 2 May 25, 2021
© 2021 Kleinfelder www.kleinfelder.com
KLEINFELDER 3200 Gateway Centre Blvd. Suite 100, Morrisville, NC 27560 p | 919.755.5011

May 25, 2021
Kleinfelder File No. RAL21L126135

Mr. Richard Curry
Daimler Trucks, NA/Thomas Built Buses
1408 Courtesy Road
High Point, North Carolina 27260

SUBJECT: Free Product Recovery May 2021
Daimler Trucks, NA – Thomas Built Buses
C2 Undercoating Building
715 W. Fairfield Road
High Point, North Carolina 27263
Incident 95201
Kleinfelder Project No. 20213510.001A

Dear Mr. Curry:

Kleinfelder is pleased to provide the results of the May 2021 free product recovery completed at
the referenced facility.

METHODOLOGY
A 24-hour mobile multi-phase extraction (MMPE) event was conducted on May 4 and 5, 2021
within the C2 Undercoating Building. Prior to the MMPE event, monitoring wells MW-1 through
MW-6, and recovery wells RW-1, RW-2 and RW-3 were gauged for the presence of free product
(attached table 1). The MMPE event consisted of placing a poly vinyl chloride (PVC) stinger pipe
into the wells with a rubber seal and placing a constant 17 to 18 inches of mercury vacuum on
the wells. The well locations are presented on attached Figure 2.

FINDINGS
During the MMPE event, a total of 180 gallons of water and product were removed from the site
and properly disposed at a North Carolina certified disposal facility. Of the 180 gallons of liquid,
23 gallons were determined to be free product. A copy of the MMPE report is included as an
attachment.

Free product levels measured on May 2, 2021 were compared to those measured immediately
prior to the April 6, 2021 MMPE event as well as the intermediate gauging event on May 19, 2021.
The free product thickness in monitoring well MW-4 had decreased between April 6 and May 2
by 0.07 feet. The free product thickness in recovery well RW-1 decreased between April 6 and
May 2 by 0.72 feet. The free product thickness in recovery well RW-2 had increased between
April 6 and May 2 by 0.07 feet. The free product thickness in recovery well RW-3 had decreased
between April 6 and May 2 by 0.15 feet. The free product thicknesses decreased between May
2 and May 19 in MW-4, RW-2 and RW-3 with a slight increase in RW-1. No free product was
detected in monitoring wells MW-1, MW-2, MW-3, MW-5 or MW-6. To date, a total of 811 gallons
of free product and 5450 gallons of groundwater/product have been recovered. The historical
20213510.001A | RAL21L126135 Page 2 of 2 May 25, 2021
© 2021 Kleinfelder www.kleinfelder.com

free product measurements are provided on attached Table 1 and the total estimated quantity of
free product and groundwater recovered to date is included on attached Table 2.

Kleinfelder appreciates the opportunity to be of service to you. Should you have questions or
require additional information regarding this project, please do not hesitate to contact the
undersigned.

Sincerely,
KLEINFELDER, INC.

Michael J Burns, PG
Environmental Program Manager

MJB:asp

Attachments: Figure 2
Table 1
Table 2
MMPE Report

cc: Gene Mao, Guilford County Health Department w/enc.

20213510.001A | RAL21L126135 May 25, 2021
© 2021 Kleinfelder www.kleinfelder.com

FIGURE 2

Water

Stormwater
The information included on this graphic representation has been compiled from a variety of sources and is
subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to
accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended foruse as a land survey product nor is it designed or intended as a construction design document. The use or misuse
of the information contained on this graphic representation is at the sole risk of the party using or misusing the
information.CAD FILE: W:\Enviro\Client Proposal And Project Files\Thomas Built Buses\Projects\20213510.001A - Implementation Plan\CAD\CSAA_Thomas Built Buses - Plant C2.dwgPLOTTED: 2/8/2021 1:30 PM BY: terry benton132
FIGURE
DRAWN BY:
PROJECT NO.
CHECKED BY:
REVISED:
DATE:
PAGE:of
20213510
TLB
MJB
02-08-2021
-
2
715 W. FAIRFIELD ROAD
HIGH POINT, GUILFORD COUNTY, NC
THOMAS BUILT BUSES - PLANT C2
SITE MAP
CORRECTIVE ACTION PLAN
N
0
SCALE IN FEET
100 200
SCALE: 1" = 100'
RECOVERY WELL
GROUNDWATER MONITORING WELL
LEGEND
MW-3 MW-4
MW-6
MW-5
MW-1
MW-2
RW-1
RW-2
RW-3
Water Tank
(Undeground
)
Undercoating
Building
GROUNDWATER FLOW DIRECTION
STORMWATER CATCH BASIN
20213510.001A | RAL21L126135 May 25, 2021
© 2021 Kleinfelder www.kleinfelder.com

TABLES 1 AND 2

Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
MW-1 5/10/2012 99.93 9 - 19 19 12/3/2019 99.49 ND 9.92 ND 89.57
9/30/2020 NM NM NM NM
10/15/2020 ND 9.32 ND 90.17
10/22/2020 ND 9.27 ND 90.22
10/29/2020 ND 8.71 ND 90.78
11/5/2020 ND 9.48 ND 90.01
11/12/2020 ND 7.34 ND 92.15
11/19/2020 ND 9.50 ND 89.99
12/15/2020 ND 9.50 ND 89.99
12/21/2020 NM NM NM NM
12/22/2020 ND 9.66 ND 89.83
12/29/2020 ND 9.66 ND 89.83
1/14/2021 ND 9.41 ND 90.08
1/21/2021 NM NM NM NM
1/28/2021 ND 9.80 ND 89.69
2/1/2021 ND 9.27 ND 90.22
2/19/2021 ND 9.59 ND 89.9
3/2/2021 NM NM NM NM
3/16/2021 ND 9.32 ND 90.17
4/5/2021 ND 9.32 ND 90.17
4/20/2021 ND 9.23 ND 90.26
5/2/2021 NM NM NM NM
5/19/2021 ND 9.3 ND 90.19
MW-2 5/10/2012 100.00 10 - 20 20 12/3/2019 99.36 ND 8.14 ND 91.22
9/30/2020 NM NM NM NM
10/15/2020 ND 7.18 ND 92.18
10/22/2020 ND 7.30 ND 92.06
10/29/2020 ND 7.43 ND 91.93
11/5/2020 ND 7.33 ND 92.03
11/12/2020 ND 7.48 ND 91.88
11/19/2020 ND 7.42 ND 91.94
12/15/2020 NM 6.18 NM 93.18
12/21/2020 NM NM NM NM
12/22/2020 ND 7.75 ND 91.61
12/29/2020 ND 7.80 ND 91.56
1/14/2021 ND 7.88 ND 91.48
1/21/2021 ND 7.90 ND 91.46
1/28/2021 ND 7.88 ND 91.48
2/1/2021 ND 7.94 ND 91.42
2/19/2021 ND 7.77 ND 91.59
3/2/2021 NM NM NM NM
3/16/2021 ND 7.64 ND 91.72
4/5/2021 ND 7.36 ND 92.00
4/20/2021 ND 7.25 ND 92.11
5/2/2021 ND 7.27 ND 92.09
5/19/2021 ND 7.20 ND 92.16
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
MW-3 5/10/2012 101.93 3 - 13 13 10/2/2019 101.57 ND 4.98 ND 96.59
9/30/2020 NM NM NM NM
10/15/2020 ND 4.10 ND 97.47
10/22/2020 ND 4.31 ND 97.26
10/29/2020 ND 4.21 ND 97.36
11/5/2020 ND 4.23 ND 97.34
11/12/2020 ND 3.91 ND 97.66
11/19/2020 ND 4.20 ND 97.37
12/15/2020 ND 4.23 ND 97.34
12/21/2020 NM NM NM NM
12/22/2020 ND 3.86 ND 97.71
12/29/2020 ND 3.89 ND 97.68
1/14/2021 ND 3.81 ND 97.76
1/21/2021 ND 4.01 ND 97.56
1/28/2021 ND 3.92 ND 97.65
2/1/2021 ND 3.54 ND 98.03
2/19/2021 ND 2.80 ND 98.77
3/2/2021 NM NM NM NM
3/16/2021 ND 3.36 ND 98.21
4/5/2021 ND 2.85 ND 98.72
4/20/2021 ND 3.36 ND 98.21
5/2/2021 ND 3.56 ND 98.01
5/19/2021 ND 3.87 ND 97.70
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
MW-4 5/10/2012 102.00 9 - 19 19 11/18/2019 101.59 10.35 14.55 4.20 90.61
12/3/2019 8.40 9.70 1.30 92.99
1/9/2020 8.47 10.55 2.08 92.81
1/23/2020 8.76 11.25 2.49 92.46
2/13/2020 8.51 11.09 2.58 92.69
3/19/2020 8.48 11.47 2.99 92.66
6/1/2020 8.10 8.60 0.50 93.42
9/30/2020 7.62 10.99 3.37 93.46
10/15/2020 10.01 18.50 8.49 90.31
10/22/2020 7.99 9.24 1.25 93.41
10/29/2020 7.99 10.75 2.76 93.19
11/5/2020 7.78 11.50 3.72 93.25
11/12/2020 7.27 18.50 11.23 92.64
11/19/2020 7.88 18.58 10.70 92.11
12/15/2020 8.38 18.35 9.97 91.71
12/21/2020 8.36 8.81 0.45 93.16
12/22/2020 8.21 18.50 10.29 91.84
12/29/2020 8.23 18.50 10.27 91.82
1/14/2021 8.06 9.28 1.22 93.35
1/21/2021 8.01 9.46 1.45 93.36
1/28/2021 7.95 9.75 1.80 93.37
2/1/2021 8.06 9.57 1.51 93.30
2/19/2021 8.09 9.64 1.55 93.27
3/2/2021 7.86 10.01 2.15 93.41
3/16/2021 8.17 9.55 1.38 93.21
4/5/2021 7.93 9.62 1.69 93.41
4/20/2021 8.02 9.26 1.24 93.38
5/2/2021 7.86 9.48 1.62 93.49
5/19/2021 8.08 9.36 1.28 93.32
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
MW-5 2/1/2018 101.89 5 - 15 15 12/3/2019 101.50 ND 9.43 ND 92.07
1/9/2020 ND 9.52 ND 91.98
1/23/2020 ND 9.39 ND 92.11
2/13/2020 ND 9.22 ND 92.28
3/19/2020 ND 9.16 ND 92.34
6/1/2020 ND 9.18 ND 92.32
9/30/2020 ND 9.20 ND 92.30
10/15/2020 ND 9.08 ND 92.42
10/22/2020 ND 9.11 ND 92.39
10/29/2020 ND 9.14 ND 92.36
11/5/2020 ND 9.10 ND 92.40
11/12/2020 ND 9.02 ND 92.48
11/19/2020 ND 9.10 ND 92.40
12/15/2020 ND 8.80 ND 92.70
12/21/2020 ND NM ND NM
12/22/2020 ND 8.94 ND 92.56
12/29/2020 ND 8.98 ND 92.52
1/14/2021 ND 8.96 ND 92.54
1/21/2021 ND 9.00 ND 92.50
1/28/2021 ND 9.03 ND 92.47
2/1/2021 ND 8.97 ND 92.53
2/19/2021 ND 8.82 ND 92.68
3/2/2021 ND 8.75 ND 92.75
3/16/2021 ND 8.76 ND 92.74
4/5/2021 ND 9.01 ND 92.49
4/20/2021 ND 9.15 ND 92.35
5/2/2021 ND 9.13 ND 92.37
5/19/2021 ND 9.05 ND 92.45
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
MW-6 2/1/2018 101.91 5 - 15 15 10/2/2019 101.41 ND 6.48 ND 94.93
9/30/2020 NM NM NM NM
10/15/2020 ND 5.97 ND 95.44
10/22/2020 ND 6.08 ND 95.33
10/29/2020 ND 5.97 ND 95.44
11/5/2020 ND 6.10 ND 95.31
11/12/2020 ND 5.99 ND 95.42
11/19/2020 ND 6.11 ND 95.30
12/15/2020 ND 6.28 ND 95.13
12/21/2020 NM NM NM NM
12/22/2020 ND 6.13 ND 95.28
12/29/2020 ND 6.16 ND 95.25
1/14/2021 ND 6.08 ND 95.33
1/21/2021 ND 6.11 ND 95.30
1/28/2021 ND 6.22 ND 95.19
2/1/2021 ND 6.01 ND 95.40
2/19/2021 ND 5.78 ND 95.63
3/2/2021 NM NM NM NM
3/16/2021 ND 5.70 ND 95.71
4/5/2021 ND 5.37 ND 96.04
4/20/2021 ND 5.39 ND 96.02
5/2/2021 ND 5.48 ND 95.93
5/19/2021 ND 5.77 ND 95.64
B-26 2/2/2018 NS
14.6
0.6 stickup 5/8/2019 NS ND 7.15 ND NS
KLF-5 4/19/2019 NS 6 - 16 16 5/8/2019 NS ND 9.20' bgs ND NS
KLF-6 4/20/2019 NS 5 - 15 15 5/8/2019 NS ND 8.67' bgs ND NS
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
RW-1 4/11/2013 102.03 7 - 12 12.7 11/18/2019 101.75 9.13 10.50 1.37 92.41
12/3/2019 8.76 10.60 1.84 92.71
1/9/2020 8.90 11.23 2.33 92.50
1/23/2020 8.76 11.25 2.49 92.62
2/13/2020 8.51 11.09 2.58 92.85
3/19/2020 8.48 11.27 2.79 92.85
6/1/2020 8.12 9.83 1.71 93.37
9/30/2020 7.68 11.01 3.33 93.57
10/15/2020 8.10 9.31 1.21 93.47
10/22/2020 7.99 9.62 1.63 93.52
10/29/2020 8.12 12.34 4.22 93.00
11/5/2020 8.78 12.30 3.52 92.44
11/12/2020 8.08 12.30 4.22 93.04
11/19/2020 8.18 12.30 4.12 92.95
12/15/2020 8.71 12.32 3.61 92.50
12/21/2020 8.50 9.06 0.56 93.17
12/22/2020 9.39 12.45 3.06 91.90
12/29/2020 8.51 12.30 3.79 92.67
1/14/2021 8.33 9.46 1.13 93.25
1/21/2021 8.36 9.70 1.34 93.19
1/28/2021 8.46 9.97 1.51 93.06
2/1/2021 8.30 9.78 1.48 93.23
2/19/2021 8.23 8.83 0.60 93.43
3/2/2021 8.18 9.99 1.81 93.30
3/16/2021 8.07 9.37 1.30 93.49
4/5/2021 7.70 9.32 1.62 93.81
4/20/2021 7.90 8.65 0.75 93.74
5/2/2021 7.85 8.75 0.90 93.77
5/19/2021 7.92 8.88 0.96 93.69
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
RW-2 4/11/2013 101.97 7 - 12 12.3 11/18/2019 101.71 9.15 9.62 0.47 92.49
12/3/2019 8.96 9.93 0.97 92.60
1/9/2020 9.30 10.72 1.42 92.46
1/23/2020 8.95 10.36 1.41 92.55
2/13/2020 8.73 9.95 1.22 92.80
3/19/2020 8.77 9.67 0.9 92.81
6/1/2020 8.39 9.57 1.18 93.14
9/30/2020 8.06 9.07 1.01 93.50
10/15/2020 8.27 8.92 0.65 93.34
10/22/2020 7.39 9.72 2.33 93.97
10/29/2020 8.06 10.55 2.49 93.28
11/5/2020 8.37 11.91 3.54 92.81
11/12/2020 8.21 12.30 4.09 92.89
11/19/2020 8.45 12.30 3.85 92.68
12/15/2020 8.32 12.30 3.98 92.79
12/21/2020 8.46 9.15 0.69 93.15
12/22/2020 8.15 12.30 4.15 92.94
12/29/2020 8.25 12.30 4.05 92.85
1/14/2021 8.46 9.23 0.77 93.13
1/21/2021 8.49 9.28 0.79 93.10
1/28/2021 8.70 9.97 1.27 92.82
2/1/2021 8.43 9.24 0.81 93.16
2/19/2021 8.40 8.82 0.42 93.25
3/2/2021 8.39 9.01 0.62 93.23
3/16/2021 8.25 8.85 0.60 93.37
4/5/2021 7.98 8.70 0.72 93.62
4/20/2021 8.03 8.70 0.67 93.58
5/2/2021 7.99 8.78 0.79 93.60
5/19/2021 8.11 8.86 0.75 93.49
Well No. Date
Installed
Ground
Elevation
(feet)
Screened
Interval
(ft, bgs)
Total Well
Depth (ft,
bgs)
Date Water
Level
Measured
TOC
Elevation
(feet)
Depth to
Product
(ft, btoc)
Depth to
Water (ft,
btoc)
Product
Thickness
(feet)
Corrected
Groundwater
Elevation
(feet)
TABLE 1
PRODUCT / GROUNDWATER INFORMATION
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
RW-3 4/11/2013 101.98 7 - 12 12.7 11/18/2019 101.60 10.09 11.8 1.71 91.25
12/3/2019 7.41 9.96 2.55 93.81
1/9/2020 6.91 9.82 2.91 94.63
1/23/2020 7.20 10.41 3.21 93.92
2/13/2020 7.24 10.66 3.42 93.85
3/19/2020 7.36 10.31 2.95 93.80
6/1/2020 7.55 9.23 1.68 93.80
9/30/2020 7.21 10.51 3.30 93.90
10/15/2020 7.34 9.65 2.31 93.91
10/22/2020 8.35 9.23 0.88 93.12
10/29/2020 7.23 10.16 2.93 93.93
11/5/2020 7.10 10.80 3.70 93.95
11/12/2020 7.26 16.90 9.64 92.89
11/19/2020 7.20 11.95 4.75 93.69
12/15/2020 9.60 12.20 2.60 91.61
12/21/2020 8.83 9.92 1.09 92.61
12/22/2020 8.65 12.1 3.45 92.43
12/29/2020 8.67 12.3 3.63 92.39
1/14/2021 7.46 9.10 1.64 93.89
1/21/2021 7.31 9.06 1.75 94.03
1/28/2021 7.34 9.15 1.81 93.99
2/1/2021 7.30 9.15 1.85 94.02
2/19/2021 7.77 9.76 1.99 93.53
3/2/2021 7.26 9.99 2.73 93.93
3/16/2021 8.18 9.87 1.69 93.17
4/5/2021 7.28 9.40 2.12 94.00
4/20/2021 7.90 9.60 1.70 93.45
5/2/2021 7.25 9.22 1.97 94.05
5/19/2021 7.87 9.39 1.52 93.50
Notes:
NM = Not measured
NS = Well not surveyed
Corrected GW Elevation = TOC Elevation - DTW + (FPT x 0.85)
Measurements are in feet below ground surface (bgs) or below the top of the PVC well casing (btoc)
Elevations are referenced to an assumed site datum (ground surface at MW-2 assigned elevation of 100.00 feet)
Groundwater levels were measured using a water level meter and/or Interface Probe
Groundwater level/elevation in wells with product adjusted using a specific gravity of 0.85 for product (hydraulic oil)
ND = Product not detected
Date Product (1)Prod + Water
Recovered 6/4/2012 0.3 3
11/12/2012 0.3 3
4/16/2013 9 94
5/21/2013 12 123
7/22/2013 9 94
8/12/2013 9 94
11/6/2013 9 94
1/24/2014 4 44
5/23/2014 7 67
8/14/2014 9 94
3/13/2015 7 69
6/4/2015 7 67
9/2/2015 7 69
12/16/2015 10 96
3/31/2016 7 67
6/24/2016 9 94
9/12/2016 7 69
11/23/2016 17 167
3/2/2017 10 96
6/7/2017 7 69
9/29/2017 10 95
12/4/2017 7 69
1/24/2018 8 75
2/21/2018 7 69
3/23/2018 7 69
4/30/2018 9 86
5/30/2018 7 69
6/22/2018 7 69
7/30/2018 8 75
8/20/2018 10 96
8/27/2018 1 12
9/17/2018 7 69
10/17/2018 7 69
11/19/2018 7 69
12/3/2018 7 69
12/21/2018 5 45
1/4/2019 4 44
1/17/2019 7 67
1/31/2019 7 67
2/13/2019 5 45
2/27/2019 5 45
TABLE 2
Free Product Recovery
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
Page 1
TABLE 2
Free Product Recovery
Thomas Built Buses, 715 West Fairfield Road - C2 Undercoating Building
3/6/2019 7 69
3/20/2019 5 45
4/5/2019 4 44
4/22/2019 5 45
5/8/2019 7 69
5/22/2019 7 69
6/3/2019 5 49
6/17/2019 7 69
6/28/2019 7 69
Total Gallons 7/10/2019 7 67
Recovered 7/24/2019 7 69
8/7/2019 7 67
8/21/2019 7 69
9/4/2019 5 45
9/18/2019 7 69
10/16/2019 5 45
10/30/2019 7 69
11/13/2019 7 69
9/29-30/2020 95 125
12/2-6/2020 210 702
2/7-8/2021 40 60
3/2-3/2021 21 190
4/6-7/2021 18 150
5/4-5/2021 23 180
Totals 811 5450
Product Prod + Water
Notes:
The casing diameter in the wells is two inches.
Page 2
20213510.001A | RAL21L126135 May 25, 2021
© 2021 Kleinfelder www.kleinfelder.com

MMPE REPORT

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Attn: Richard Curry
Thomas Built Buses, Inc.
1408 Courtesy Road
High Point, NC 27260
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Thomas Built Buses, Inc.
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documentsubmission
@diamler.com
INVOICE #1938
DATE 05/13/2021
DUE DATE 07/12/2021
TERMS Net 60

JOB#; NAME DATES OF SERVICE PO# OR PM
Thomas Built Buses,*** 5/4-5/5, 2021 ***3431010259
TASK DESCRIPTION QTY RATE UNITS AMOUNT
7.420a MMPE system and power supply 1 1,100.00 event 1,100.00
7.420a Equipment 1 600.00 event 600.00
7.420c Fluids disposal 180 0.35 gallon 63.00
7.420a Time for MMPE prep., system setup,
supervision, operation and
maintenance, breakdown and report
1 1,000.00 event 1,000.00
PO # 3431010259
Vendor # 16035197

Thank you for your business! Past due amounts
are subject to finance charges of 1.5% per month
plus all applicable attorney's collection fees.
BALANCE DUE $2,763.00

ADVANCED
ENVIRONMENTAL SERVICES, INC.
“Your Environmental Solutions Partner”

MOBILE
MULTI-PHASE
EXTRACTION REPORT

Site Location:

Thomas Built Buses Plant C2
715 West Fairfield Road
High Point, North Carolina

Prepared for:

Thomas Built Buses
1408 Courtesy Road
High Point, North Carolina 27260
PM – Mr. Richard Curry

May 13, 2021

TABLE OF CONTENTS

EVENT SUMMARY

MMPE FIELD LOG

MASS-REMOVAL CALCULATION

FIELD NOTES

DISPOSAL MANIFEST

MOBILE MULTI-PHASE EXTRACTION
EVENT SUMMARY

May 13, 2021

Location: Thomas Built Buses Plant C2
715 West Fairfield Road
High Point, North Carolina

Client: Thomas Built Buses
1408 Courtesy Road
High Point, North Carolina 27260

Event Dates: May 4 – 5, 2021
Advanced Job # 05 – 2124

Advanced Personnel: Lee Heilig and Gary McDaniel

MMPE System: MMPE system rated 24”hg at 140 CFM
4’ discharge stack - 2” diameter
600 - gallon totes
Approximately 160’of 1.5” hose to 4 wells

Extraction Well: MW-4, RW-1, RW-2 and RW-3

Well Initial FP/WL(ft) Final FP/WL(ft) Stinger depth(ft) Run Time
MW-4 7.74/9.99 17.67 17.5 24.0 hours
RW-1 7.85/9.13 12.39 dtb 11.5 24.0 hours
RW-2 8.01/9.10 11.80 11.5 24.0 hours
RW-3 7.23/9.52 11.51/11.98 11.5 24.0 hours

Description of Event
The MMPE event ran from 14:50 May 4 through 14:50 May 5, 2021. The MMPE system was
active for 24.0 hours. During the event vacuum at the recovery pump ranged from 19.0 to 21.0
inches of mercury (hg) and stabilized at approximately 19.0 inches of mercury. Airflow rates
ranged from 2,800 to 3,100 feet per minute and stabilized at 3,100 feet per minute. System
temperature ranged from 114 - 140 degrees (F) and humidity ranged from 47 to 99 percent. Field
gauged volatile organic compounds (VOC’s) decreased from 1,000 parts per-million (PPM) to
500 PPM throughout the event.

Groundwater / Product Mix Recovered:
During the event, a total of 180 gallons of product/water mix were removed from the site and
properly disposed at a certified North Carolina disposal facility. An estimated 23 gallons of free
product was recovered as liquid. Total fluids recovered, was measured based on stick readings
conducted during and following the event. Based on 24.0 hours of operation and a total of 180
gallons recovered, the average groundwater recovery rate was calculated to be approximately
7.50 gallons per hour.

Events Results:
Based on mass-removal calculations 2.17 pounds or 0.35 gallons of VOC’s were removed as
vapor. Using Dwyer Magnehelic gauges, vacuum influence (inches of water) was measured at
monitoring point MW-5. Vacuum influence was observed at monitoring point MW-5 up to
0.05 inches of water. Draw-down was observed in MW-5 at 0.02 feet.

MMPE FIELD LOG:
CLIENT: Thomas Built Buses
JOB NAME: Thomas Built Buses Plant C2
LOCATION: High Point, NC
MMPE EVENT DATES: May 4 - 5, 2021
EXTRACTION POINTS: MW-4, RW-1, RW-2 and RW-3
AES JOB NUMBER: 05 - 2124
DATE TIME FLOW (f/m) HUM.(%) TEMP. (F)VOC's(ppm)VAC. (hg")GALLONS STINGER/WL's EXTRACTION POINTS (hg")
MW-4 RW-1 RW-2
Stinger(ft)17.50 11.50 11.50
Start 14:50 Initial WL's 7.74/9.99 7.85/9.13 8.01/9.10
05/04/21 15:00 2,800 99.0 114 1,000 21.0 14.0 15.0 15.0
16:00 3,000 88.0 132 900 20.0 14.0 15.0 15.0
17:00 2,900 80.0 130 700 20.0 14.0 15.0 15.0
05/05/21 8:15 3,000 61.0 128 700 19.0 70 gal.14.0 15.0 14.0
9:15 3,100 57.0 130 680 19.0 14.0 14.0 14.0
10:15 3,100 59.0 134 700 19.0 13.0 14.0 14.0
11:15 3,100 52.0 134 500 19.0 13.0 14.0 14.0
14:15 3,100 47.0 140 500 19.0 13.0 14.0 14.0
Final WL's 17.67 12.39/dtb 11.80
End 14:50 Total fluids: 180 gal.
Total free product:23 gal.
DATE TIME EXTRACTION POINTS (hg") cont. VACUUM INFLUENCE (h20")WELL GAUGING (ft)
RW-3 MW-5 MW-5
Start 14:50 Stinger (ft)11.50
initial WL's 7.23/9.52 9.12
05/04/21 15:00 17.0
16:00 17.0 0.05
17:00 17.0
05/05/21 8:15 16.0
9:15 16.0
10:15 15.0
11:15 15.0 0.00 9.14
14:15 15.0
Final WL's 11.51/11.98
End 14:50
Page 1 of 1
MOBILE MULTI-PHASE EXTRACTION EVENT
SITE NAME: THOMAS BUILT BUSES PLANT C2 CLIENT: THOMAS BUILT BUSES
INCIDENT NUMBER:
AVERAGE DEPTH TO GROUNDWATER: 7 - 11 ft.
DESCRIBE SOIL IN THE SATURATED ZONE:
AVERAGE HYDRAULIC CONDUCTIVITY (if known):
EXTRACTION WELLS USED FOR MMPE: MW-4, RW-1, RW-2 and RW-3
SPECIFICATIONS OF THE MMPE SYSTEM (cfm @ in Hg): 140 cfm @ 24.0"Hg
DRY STANDARD CUBIC FEET PER MINUTE (DSCFM) AIR FLOW CALCULATIONS (Qstd)
Date Hours Vacuum Velocity Pipe ID Temp Rel Humid Water Water Qstd(inches of Hg)(ft/min)(in)(°F)(%)Vapor (Wt%)Vapor (Vol%)(flow)
5/4/21 24.00 19.50 3013.00 2 130 68.0 0.07 0.101 53
5/5/21
NOTES
Qstd = Flow at DSCFM
Vacuum = The level of vacuum being applied should be recorded from the MMPE system (inches of Hg)
Velocity = The rate at which air flows is measured at the blower discharge piping (anemometer or pitot tube)
Pipe ID = The inside diameter of the blower discharge piping (from the MMPE system)
Temperature = The temperature of the air stream exiting the blower discharge piping (dry bulb temp., in deg.°F)Relative humidity = The % relative humidity of the air stream exiting the blower discharge piping
Bwsw = water vapor % by weight, i.e., pounds of water per pound of dry air, derived from the Psychrometric chart (temp Vs relative humidity)
Bws = water vapor % by volume
EQUATIONS
Bws = (Bwsw/18 lb-mole H20)/[(1/28.84 lb-mole dry air) + (Bwsw/18 lb-mole H2O)]Qstd = (1-Water Vapor) * velocity * (PI * (diameter/24)2) * (528°R/(Temp + 460))
EMISSION CALCULATIONS
Elapsed
Time Flow PPMmeasured PPMwet PPMdry K PPMconc Cc:m Cc PMRc PMRg PMR
(hour)(DSCFM)(ppm)(#C - gas)(mg/dsm3)(lb/dscf)(lb/hour)(lb/hour)(lb)
24 53 710 710 790 1 790 394 2.45971E-05 0.08 0.09 2.17
Total emissions in pounds 2.17
Total emissions as gallons (pounds / 6.152)0.35
NOTES
PPMmeasured = Actual measurements (ppm) taken with a OVA or TVA at the blower discharge piping
PPMwet = "wet" concentration
PPMdry = "dry" concentration
K = Number of carbons in calibration gas: (Methane K = 1, or Propane K = 3, or Hexane K = 6)
PPMc= PPMv, Volumetric concentration of VOC emissions as carbon, dry basis at STP
Cc:m = mg/dsm3, mass concentration of VOC emissions as carbon
Mc = 12.01 mg/mg-mole, molecular weight of carbon
K3 = 24.07 dsm3/106 mg-mole, mass to volume conversion factor at STP
Cc = lb/dcsf, mass concentration of VOC emissions as carbon, dry basis at STP
PMRc = lb/hr, pollutant mass removal rate of VOC's as carbon
PMRg = lb/hr, pollutant mass removal rate of of VOC's as gasolinePMR = lb, pollutant mass removal of VOC's as gasoline
EQUATIONS
PPMwet = PPMmeasuredPPMdry = (PPMwet)/(1-Bws)
PPMc = (PPMd)(K)
Cc:m = (PPMc)(Mc / K3)Cc = (Cc:m)(62.43x10-9 lb-m3/mg-ft3)
PMRc = (Cc)(Qstd)(60 minute/hour)
PMRg = (PMRc)(Mg/Mcg)
PMR = (PMRg)(#hours)