4101_Guilford_HighPoint_MSWLF_Seaboard_RemedialProgressReport_FID1623125_20211101

SEABOARD GROUP II AND THE CITY OF HIGH POINT
November 1, 2021
Eric B. Aufderhaar, P.G., Environmental Program Consultant
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Action Progress Report, 2021 Third Quarter
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Aufderhaar:
The Seaboard Group II and the City of High Point are providing this 2021 Third Quarter
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and the
closed Riverdale Drive Landfill located in Jamestown, NC.
During the third quarter of 2021 the mechanical and phytoremediation treatment systems
processed 3,196,226 gallons of extracted groundwater and leachate. Also during the third
quarter of 2021 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
July 3, 2021
2.5 days
PW-DR1 Pump Failure - Replaced
July 11, 2021
1.0 days
EQ Tank Float Switch Fault — Replaced
August 14, 2021
6.0 days
Bi-Annual System Cleaning and Maintenance
During September 2021, an evaluation of the mechanical treatment system was completed by the
firm Hazen and Sawyer (Hazen). The evaluation focused on the chemical feed systems used to
pretreat the influent prior to distribution to the phytoremediation system which included bench -
scale testing. Based on Hazen's bench -scale testing, recommendations were provided to adjust
the chemical feed concentrations to reduce the calcium and turbidity of the pretreated effluent.
The recommendations are currently being implemented.

Several water level transduces have become inoperable due to lightning strikes and flooding.
Repairs to these transducers are scheduled for early November 2021. New transducers and
associated supplies have been purchased for the planned repair activities.
The attached figures provide the results of the full scale operation of the treatment system during
the first quarter of 2021, including: Operating Data, Process Flow Data, Static Water Level Data,
System Chemistry, Utility Use Data, and Contaminant Removal Efficiency.
Please contact Mr. Gary D. Babb (919/605-4719) or Craig Coslett (610/435-1151) if there are
any questions or comments. Please direct correspondence related to this matter to:
Mr. Craig Coslett
de maximis, inc.
1550 Pond Road, Suite 120
Allentown, PA 18104
Communications via electronic mail should be directed to [e-mail] and
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
--.1 -1 xzalll
Gary D. Babb, P.G.
Babb & Associates, P.A.
cc: Dave Nutt, Esq. - Seaboard Trustee
Jim Schenker, Technical Committee Oversight
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Bruce Ashley, City of High Point Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
Quarterly
Units of
QUARTERLY LOG -Q32021
INITIAL
WEEK
WEEK
WEEK
WEEK4
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
LEACHATE (GALLONS)
10,222,304
10,300,244
10,380,430
10,488,035
10,585,973
10,677,752
10,760,074
10,830,380
10,886,056
10,977,393
11,081,829
11,144,990
11,208,203
11,290,031
1,067,727
GALLONS
LSl-RWs (GALLONS)
8,039,599
8,104,726
8,172,739
8,261,908
8,349,458
8,425,246
8,502,258
8,564,114
8,606,844
8,691,480
8,781,536
8,849,604
8,928,394
9,008,072
968,473
GALLONS
PWDR1(GALLONS)
10,311,787
10,362,450
10,391,920
10,453,709
10,536,789
10,620,493
10,703,928
10,769,605
10,816,034
10,896,470
10,982,286
11,047,181
11,125,827
11,204,994
893,207
GALLONS
SIS-RWs (GALLONS)
3,377,264
3,391,731
3,408,867
3,432,119
3,458,307
3,478,359
3,497,072
3,513,444
3,513,444
3,513,444
3,531,206
3,544,262
3,557,716
3,583,885
206,621
GALLONS
PHYTO DISCH. (GALLONS)
12,491,564
12,697,911
12,893,799
13,175,692
13,478,165
13,753,606
14,024,576
14,250,164
14,395,925
14,655,888
14,958,101
15,171,259
15,412,272
15,687,790
3,196,226
GALLONS
AIR STRIP. RUNTIME(HRS)
13,517
13,641
13,768
13,935
14,103
14,269
14,434
14,567
14,657
14,825
15,016
15,158
15,324
15,491
1974(90.4%)
HOURS
LSl COMP RUN (HOURS)
17,260
17,390
17,510
17,680
17,850
18,010
18,180
18,310
18,400
18,570
18,760
18,910
19,070
19,240
1,980
HOURS
LSl COMP LOAD (HOURS)
8,335
8,389
8,447
8,521
8,595
8,666
8,732
8,787
8,825
8,896
8,975
9,035
9,105
9,179
844
HOURS
LS2 COMP RUN (HOURS)
26,950
27,070
27,180
27,340
27,500
27,660
27,800
27,950
27,960
27,960
28,040
28,170
28,330
28,490
1,540
HOURS
LS2 COMP LOAD (HOURS)
3,023
3,036
3,050
3,069
3,089
3,107
3,127
3,175
3,177
3,177
3,187
3,201
3,224
3,245
222
HOURS
ELECT. UPPER (kW-Hr)
4,423
4,455
4,483
4,520
4,559
4,594
4,630
4,656
4,681
4,704
4,737
4,768
4,804
4,843
420
KW-HR
WATER METER (CF)
487,753
488,172
488,778
489,390
489,794
490,633
491,361
491,820
493,450
493,867
494,517
495,154
496,073
496,815
67,784
GALLONS
BACKWASH PUMP (GAL.)
589,624
592,319
595,916
598,636
601,342
606,762
611,276
613,974
613,974
615,815
619,494
623,173
628,692
633,293
43,669
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
997,822
1,010,355
1,021,863
1,038,529
1,055,840
1,072,288
1,087,377
1,101,320
1,110,112
1,126,103
1,145,321
1,158,153
1,173,594
1,189,135
191,313
GALLONS
ZONE 2
1,065,432
1,078,332
1,089,215
1,105,228
1,122,177
1,137,434
1,151,666
1,163,685
1,171,077
1,184,496
1,199,927
1,210,941
1,223,266
1,237,220
171,788
GALLONS
ZONE 3
1,156,143
1,170,107
1,182,649
1,199,858
1,218,704
1,236,303
1,253,369
1,267,313
1,276,381
1,292,576
1,311,350
1,324,940
1,339,574
1,357,431
201,288
GALLONS
ZONE
987,312
998,512
1,008,304
1,021,961
1,037,159
1,051,378
1,064,778
1,075,930
1,083,086
1,096,083
1,111,734
1,122,429
1,134,142
1,148,085
160,773
GALLONS
ZONE 5
1,119,708
1,133,575
1,145,572
1,162,865
1,181,462
1,198,560
1,214,802
1,228,560
1,237,410
1,253,105
1,271,214
1,284,439
1,298,644
1,315,454
195,746
GALLONS
ZONE 6
1,168,139
1,182,316
1,195,015
1,213,021
1,232,524
1,250,095
1,267,156
1,281,835
1,291,015
1,307,429
1,326,872
1,340,968
1,356,444
1,374,773
206,634
GALLONS
ZONE 7
1,140,329
1,153,699
1,165,007
1,181,630
1,200,039
1,216,618
1,232,679
1,245,654
1,254,250
1,269,908
1,287,379
1,300,557
1,315,017
1,331,748
191,419
GALLONS
ZONE 8
1,178,546
1,192,947
1,204,718
1,222,377
1,241,440
1,259,198
1,276,569
1,290,885
1,299,920
1,316,924
1,336,363
1,349,572
1,364,977
1,382,826
204,280
GALLONS
ZONE 9
1,096,147
1,108,766
1,120,050
1,135,813
1,152,963
1,168,974
1,185,572
1,198,644
1,206,816
1,221,541
1,239,889
1,253,039
1,267,500
1,283,803
187,656
GALLONS
ZONE 10
948,208
954,297
969,025
990,015
1,012,833
1,033,785
1,054,532
1,071,443
1,081,732
1,101,520
1,125,160
1,140,631
1,158,277
1,178,697
230,489
GALLONS
ZONE 11
453,913
456,343
462,697
471,808
481,612
490,157
498,643
506,171
510,312
518,171
528,106
535,067
542,775
551,374
97,461
GALLONS
ZONE 12
1,175,432
1,190,033
1,203,090
1,221,810
1,242,066
1,259,953
1,278,017
1,293,392
1,303,034
1,320,064
1,340,439
1,354,876
1,371,146
1,389,486
214,054
GALLONS
ZONE 13
988,425
999,570
1,009,711
1,023,981
1,039,551
1,053,276
1,066,963
1,078,350
1,085,917
1,098,728
1,114,655
1,125,863
1,137,790
1,152,042
163,617
GALLONS
ZONE 14
990,147
1,001,264
1,010,973
1,025,376
1,040,149
1,053,704
1,067,077
1,078,343
1,085,825
1,099,134
1,107,167
1,115,180
1,125,789
1,138,064
147,917
GALLONS
ZONE 15
1,139,911
1,153,199
1,164,303
1,181,514
1,199,922
1,216,260
1,232,186
1,245,738
1,254,709
1,269,552
1,288,803
1,301,920
1,316,199
1,332,271
192,360
GALLONS
Zone 16
1,045,567
1,058,315
1,068,956
1,085,039
1,102,865
1,117,923
1,133,993
1,146,434
1,154,990
1,169,309
1,187,650
1,200,047
1,213,671
1,229,899
184,332
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
65%
88%
99%
100%
99%
98%
79%
54%
100%
99%
99%
99%
99%
91%
Percent
AVERAGE FLOW (GPM)
17.9
22.7
28.0
30.0
27.3
26.9
22.4
14.5
25.8
26.2
24.7
23.9
27.3
24.4
GPM
EFF. DISCH. (GALLONS)
25,793
32,648
40,270
43,210
39,349
38,710
32,227
20,823
37,138
37,777
35,526
34,430
39,360
35,174
GPD
TOTAL INFLUENT (GALLONS)
26,025
32,468
40,259
42,108
38,760
37,355
30,602
20,691
36,630
37,259
34,863
33,443
38,120
34,506
GPD
INF. LEACHATE (GALLONS)
9,743
13,364
15,372
13,991
13,111
11,760
10,044
7,954
13,048
13,055
10,527
9,030
11,690
11,745
GPD
INF. LS1-RWs (GALLONS)
8,141
11,336
12,738
12,507
10,827
11,002
8,837
6,104
12,091
11,257
11,345
11,256
11,383
10,679
GPD
INF. PWDR) (GALLONS)
6,333
4,912
8,827
11,869
11,958
11,919
9,382
6,633
11,491
10,727
10,816
11,235
11,310
9,801
GPD
INF. SIS-RWs (GALLONS)
1,808
2,856
3,322
3,741
2,865
2,673
2,339
2,220
2,176
1,922
3,738
2,282
GPD
WEEKLY RUNTIME (DAYS)
4.5
6.2
7.0
7.0
6.9
6.9
5.5
3.8
7.0
7.0
6.9
6.9
7.0
6.3
DAYS/WK
LSl COMP RUN (HOURS)
16.3
20.0
24.3
24.3
22.9
24.3
18.6
12.9
24.3
23.8
25.0
22.9
24.3
21.8
HRS/DAY
LSl COMP LOAD (HOURS)
6.8
9.7
10.6
10.6
10.1
9.4
7.9
5.4
10.1
9.9
10.0
10.0
10.6
9.3
HRS/DAY
LS2 COMP RUN (HOURS)
15.0
18.3
22.9
22.9
22.9
20.0
21.4
1.4
10.0
21.7
22.9
22.9
17.1
HRS/DAY
LS2 COMP LOAD (HOURS)
1.6
2.3
2.7
2.9
2.6
2.9
6.9
0.3
1.3
2.3
3.3
3.0
2.5
HRS/DAY
ELECTRICITY(kW-Hr)
4.0
4.7
5.3
5.6
5.0
5.1
3.7
3.6
3.3
4.1
5.2
5.1
5.6
4.6
kW-HR/DAY
CITY WATER (GALLONS)
52.0
101.0
87.0
58.0
120
104
66
233
60
81
106
131
106
751
GPD
BACKWASH PUMP (GAL.)
337.0
600.0
389.0
387.0
774
645
385
263
460
613
788
657
484
GPD
EFFLUENT LABS
Fe (mg/L)
0.08
0.14
0.07
0.07
0.09
0.18
0.1
0.02
0.2
0.0
0.04
0.06
0.08
0.12
0.1
mg/L
pH
6.52
6.75
6.7
6.55
6.59
7.27
6.2
6
6.73
7
6.5
7
6.45
6
7
m/L
ORP
79
20
29
221
226
195
192
185
102
141
225
143
140
169
153
mV
COND
1,024
985
1014
945.3
1266
1209
1217
1,269
1,380
1,285
1,276
1,235
1,513
1,229
1,217
uS/cm
TDS (mg/L)
709
676
700
651.7
883.1
841.6
849.5
881
965
895
896
877
1,068
866
850.0
mg/L
TSS (mg/L)
3
4
0
1
1
3
1
2
1
1
1
mg/L
WELL LEVELS
Elevation
Change
O W DR-4
682.16
OWDR-2
681.90
682.71
678.37
678.76
678.48
679.49
678.56
679.77
678.54
678.84
678.61
678.27
678.03
678.79
679.0
(2.88)
PWDR-1
689.23
683.27
658.68
658.86
658.68
658.72
658.70
658.58
658.70
658.69
658.72
658.74
658.00
658.70
660.5
(28.69)
OWDR-3
681.80
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
683.78
682.77
683.09
682.65
682.38
682.9
(0.19)
ESTIMATED LAKE LEVEL
682.6
681.2
681.3
682.0
681.4
681.3
681.4
681.5
681.5
681.2
681.0
680.8
680.54
681.42
681.3
(1.28)
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LEACHATE(LCHT)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LS-1 RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
SIS RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES

45000
40000
35000
LA
z
O
J
30000
C7
O
J
LL 25000
J_
Q
cW7 20000
a
w
a
H6111111
10000
5000
n
SEABOARD Q3 2021
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
8
7
L
5
—H INF. LEACHATE (GALLONS)
—M- INF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
INF. SIS-RWs (GALLONS)
3 —W- EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
1
w

695.00
J
W
J 675.00
J
J
W
I-10 1111
665.00
655.00
SEABOARD Q3 2021
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
OWDR-4
OWDR-2
PWDR-1
OWDR-3
PW-6D (696.79)
tOWLFS-2
tPW-16D
DPW-15D
ESTIMATED LAKE LEVEL

SEABOARD Q3 2021
1,600
1,400
1,200
1,000
p
Fe (mg/L)
z
pH
800 O
k
--�--TSS (mg/L)
a
0
—0—ORP
600
--W— CO N D
fTDS (mg/L)
400
WE

SEABOARD Q3 2021
7!1 r%
M.
5.0
W
a
4.0 w
a
J_
a
--$--LS1 COMP RUN (HOURS)
z
3.0 2
fLS1 COMP LOAD (HOURS)
a
g
fLS2 COMP RUN (HOURS)
z
LS2 COMP LOAD (HOURS)
O
ELECTRICITY (kW-Hr)
2.0 �
O
a
1.0

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
k9
k9
k9
kg
k
Step 1
Influent'
7.59
25.56
10.56
6.58
50.29
Mechanical
Effluent'
7.27
0.0091
0.0091
0.0047
7.29
Treatment
System
% Contaminant Removal
4.2%
99.96%
99.91 %
99.93%
85.5%
Irrigation water
7,270
9.1
9.1
4.7
7,293
Drainage water
452
ND
ND
ND
452
Lys 2 (vol. scaling factor, 447)
Lys 7 (vol. scaling factor, 409)
72
ND
ND
ND
7.2
Lys 8 vol. scalin actor, 572
ND
ND
ND
ND
ND
Lys 9 vol. scalin actor, 710
3.7
ND
ND
ND
3.7
Step 2
Lys 10 vol. scalingfactor, 1,199
179
ND
ND
ND
179
Phyto-
Lys 11A vol. scalingfactor, 2,022
1.3
ND
ND
ND
1.3
remediation
Lys 11B (vol. scalingfactor, 1,698)
535
ND
ND
ND
535
System
Lys 12E (vol. scalin actor; 379)
0.49
ND
ND
ND
0.49
Lys 12W (vol. scalin actor, 423)
35.5
ND
ND
ND
35.5
Lys 13E (vol. scaling factor, 769)
13,630)*
ND
ND
ND
ND
Lys 13W (vol. scalingfactor, 1,106)
4.0
ND
ND
ND
4.0
Lys 14 (vol. scaling factor, 292)
ND
ND
ND
ND
ND
Lys 15 (vol. scalingfactor, 2,222)
35.5
ND
ND
(677)*
35.5
Average
104
(n = 12)
ND
(n = 13)
ND
(n = 13)
ND
(n =12)
104
(n =12)
Step 2
% Contaminant Removal
98.6%
100%
100%
100%
98.6%
Overall Percent Contaminant Removal
98.6%
100%
100%
100%
99.8%
*The data indicated in parentheses were not included in the calculation of percent contaminant removal. Lysimeter 13E yielded
aberrant results for dioxane; Lysimeter 15 yielded aberrant results for "other organics".
1 Apparent variations In the influent and effluent mass are a result of variations related to residence time through the mechanical
treatment system. Averages calculated from a greater number of samples show that influent and effluent mass are essentially equal.