4101_Guilford_HighPoint_MSWLF_Seaboard_RemedialProgressReport_FID1584446_20210526

SEABOARD GROUP II AND THE CITY OF HIGH POINT
May 26, 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 First 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 First Quarter
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and the
closed Riverdale Drive Landfill located in Jamestown, NC.
During the first quarter of 2021 the mechanical and phytoremediation treatment systems
processed 4,159,898 gallons of extracted groundwater and leachate. Also during the first quarter
of 2021 the following shutdown exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
January 9, 2021
2.1 days
Automatic — Power failure
February 13, 2021
2.2 days
Automatic — Compressor control board failure
March 8, 2021
1.0 days
Manual — Media replacement and tank cleaning
March 20, 2021
1.5
Automatic — Hi level signal at tank T-703
On March 3, 2021, an inspection of the site was conducted by Mr. Daniel Girdner,
Environmental Specialist with the NC Hazardous Waste Section. The inspection did not indicate
any regulatory violations; however, recommendations regarding maintenance items on two
monitoring wells and removal of leaf debris on the concrete cap covering Pond 3 at the former
Seaboard Chemical facility were provided. These recommendations will be addressed during the
second quarter of 2021.

Also during the first week of March 2021, additional trees were planted within and adjacent to
the phytoremediation zones. A total of 200 loblolly pines were planted in various zones to fill in
sparsely vegetated areas. An additional 200 hybrid willows were planted along drainage areas
on the periphery of the east and west lobes of the phytoremediation zones to uptake any excess
runoff. These activities are considered routine maintenance of the phytoremediation system.
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
-"'I Z5��-
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
Hayes Finley, 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 -Q12021
INITIAL
WEEK
WEEK
WEEK
WEEK4
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
N
m
m
LEACHATE (GALLONS)
7,401,221
7,554,363
7,665,292
7,821,535
7,970,573
8,106,685
8,262,021
8,357,337
8,443,840
8,566,306
8,672,496
8,774,862
8,842,782
8,958,788
1,557,567
GALLONS
LSl-RWs (GALLONS)
6,298,999
6,367,123
6,410,857
6,487,719
6,565,562
6,645,175
6,724,564
6,769,948
6,820,061
6,883,829
6,960,069
7,021,862
7,070,886
7,125,336
826,337
GALLONS
PWDR1(GALLONS)
8,112,008
8,206,019
8,278,870
8,380,700
8,480,562
8,579,718
8,677,670
8,738,682
8,854,990
8,940,362
9,035,220
9,107,212
9,172,618
9,260,028
1,148,020
GALLONS
SIS-RWs (GALLONS)
2,760,906
2,788,304
2,806,038
2,836,062
2,864,249
2,893,692
2,922,292
2,940,567
2,974,597
2,999,226
3,026,422
3,049,799
3,061,939
3,086,374
325,468
GALLONS
PHYTO DISCH. (GALLONS)
5,246,268
5,581,825
5,812,424
6,100,688
6,445,390
6,780,884
7,136,686
7,364,369
7,655,473
7,958,230
8,279,413
8,534,408
8,727,736
9,006,200
3,759,932
GALLONS
AIR STRIP. RUNTIME (HRS)
9,572
9,714
9,830
9,991
10,157
10,325
10,494
10,596
10,782
10,924
11,089
11,236
11,346
11,491
1,919/87.9%
HOURS
LSl COMP RUN (HOURS)
13,400
13,550
13,660
13,820
13,990
14,160
14,330
14,435
14,540
14,690
14,850
15,000
15,110
15,250
1,850
HOURS
LSl COMP LOAD (HOURS)
6,759
6,823
6,868
6,936
7,005
7,067
7,139
7,179
7,220
7,280
7,334
7,387
7,426
7,479
720
HOURS
LS2 COMP RUN (HOURS)
23,210
23,340
23,430
23,590
23,740
23,900
24,060
24,160
24,340
24,480
24,640
24,780
24,890
25,020
1,810
HOURS
LS2 COMP LOAD (HOURS)
2,536
2,554
2,566
2,586
2,605
2,625
2,645
2,658
2,681
2,700
2,720
2,738
2,750
2,769
233
HOURS
ELECT. UPPER (kW-Hr)
2,687
2,771
2,860
2,956
3,057
3,159
3,263
3,349
3,464
3,536
3,629
3,692
3,765
3,818
1,131
KW-HR
WATER METER (CF)
468,754
469,121
469,725
470,367
471,540
472,230
473,412
473,830
474,421
475,013
478,360
478,690
479,410
480,033
84,367
GALLONS
BACKWASH PUMP (GAL.)
480,499
485,053
488,692
492,329
499,601
504,142
511,403
514,127
517,873
529,473
541,073
541,974
544,092
547,234
66,735
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
588,190
608,129
622,094
638,800
657,678
674,858
680,419
683,112
696,611
712,498
731,070
746,960
759,283
777,031
188,841
GALLONS
ZONE 2
620,484
641,494
565,139
673,992
694,960
715,595
736,908
749,681
765,334
783,047
802,676
818,968
831,472
849,582
229,098
GALLONS
ZONE 3
649,807
671,455
686,814
705,841
728,043
750,189
774,115
790,130
809,566
830,471
852,877
871,206
884,944
905,134
255,327
GALLONS
ZONE
551,304
569,737
582,770
598,836
617,988
636,897
656,989
670,171
685,881
702,962
721,409
737,988
750,365
768,278
216,974
GALLONS
ZONE 5
629,233
650,433
665,431
684,031
705,752
727,395
750,607
766,435
785,654
806,118
828,089
846,303
860,000
879,774
250,541
GALLONS
ZONE 6
655,523
677,666
693,311
712,609
735,421
757,563
781,927
798,168
817,624
838,883
861,855
880,749
895,000
915,651
260,128
GALLONS
ZONE 7
648,952
670,636
686,189
705,044
727,653
749,004
772,019
786,714
805,121
825,063
846,978
864,841
878,224
897,903
248,951
GALLONS
ZONE 8
668,139
690,701
706,718
725,850
749,131
771,665
796,031
811,493
830,293
851,633
873,728
892,516
906,876
927,502
259,363
GALLONS
ZONE 9
666,883
688,729
704,164
721,921
742,679
760,915
773,198
773,198
787,178
803,686
822,195
838,743
851,476
870,209
203,326
GALLONS
ZONE 10
721,393
746,077
763,048
784,226
808,667
833,358
859,861
876,806
898,168
909,392
918,246
918,246
918,246
918,246
196,853
GALLONS
ZONE 11
353,063
364,182
372,042
381,977
392,744
403,561
414,971
422,360
431,684
436,806
440,619
440,619
440,619
440,619
87,556
GALLONS
ZONE 12
671,607
694,368
702,521
716,278
739,856
763,143
789,054
805,598
825,387
847,413
870,182
889,335
903,297
923,754
252,147
GALLONS
ZONE 13
570,600
589,289
602,722
619,613
638,972
658,343
679,474
693,062
709,753
727,742
746,686
762,455
774,653
791,081
220,481
GALLONS
ZONE 14
549,008
567,094
580,024
596,281
615,123
635,851
659,700
675,157
694,586
715,163
736,876
754,579
768,311
786,214
237,206
GALLONS
ZONE 15
640,581
662,654
678,511
697,954
721,173
744,321
769,906
786,270
806,111
827,313
850,020
868,533
882,817
902,811
262,230
GALLONS
Zone 16
571,492
591,539
606,015
623,567
644,671
665,789
688,812
704,758
723,821
743,984
766,062
783,638
796,920
815,973
244,481
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
99%
69%
96%
99%
100%
101%
61%
97%
99%
98%
88%
65%
86%
89%
Percent
AVERAGE FLOW (GPM)
38.8
22.9
28.6
34.2
33.3
35.3
22.6
25.3
35.0
31.9
25.3
19.2
27.6
29.2
GPM
EFF. DISCH. (GALLONS)
55,926
32,943
41,181
49,243
47,928
50,829
32,526
36,388
50,460
45,883
36,428
27,618
39,781
42,087
GPD
TOTAL INFLUENT (GALLONS)
57,113
35,035
52,137
50,704
49,189
51,611
31,427
35,869
49,373
43,498
37,075
27,784
40,329
43,165
GPD
INF. LEACHATE (GALLONS)
25,524
15,847
22,320
21,291
19,445
22,191
13,617
10,813
20,411
15,170
14,624
9,703
16,572
17,502
GPD
INF. LS1-RWs (GALLONS)
11,354
6,248
10,980
11,120
11,373
11,341
6,483
6,264
10,628
10,891
8,828
7,003
7,779
9,253
GPD
INF. PWDR) (GALLONS)
15,669
10,407
14,547
14,266
14,165
13,993
8,716
14,539
14,229
13,551
10,285
9,344
12,487
12,784
GPD
INF. SIS-RWs (GALLONS)
4,566
2,533
4,289
4,027
4,206
4,086
2,611
4,254
4,105
3,885
3,340
1,734
3,491
3,625
GPD
WEEKLY RUNTIME (DAYS)
6.9
4.8
6.7
6.9
7.0
7.0
4.3
6.8
6.9
6.9
6.1
4.6
6.0
6.2
DAYS/WK
LSl COMP RUN (HOURS)
25.0
15.7
22.9
24.3
24.3
24.3
15.0
13.1
25.0
22.9
21.4
15.7
20.0
20.7
HRS/DAY
LSl COMP LOAD (HOURS)
10.7
6.4
9.7
9.9
8.9
10.3
5.7
5.1
10.0
7.7
7.6
5.6
7.6
8.1
HRS/DAY
LS2 COMP RUN (HOURS)
21.7
12.9
22.9
21.4
22.9
22.9
14.3
22.5
23.3
22.9
20.0
15.7
18.6
20.1
HRS/DAY
LS2 COMP LOAD (HOURS)
3.0
1.7
2.9
2.7
2.9
2.9
1.9
2.9
3.2
2.9
2.6
1.7
2.7
2.6
HRS/DAY
ELECTRICITY(kW-Hr)
14.0
12.7
13.7
14.4
14.6
14.9
12.3
14.4
12.0
13.3
9.0
10.4
7.6
12.6
kW-HR/DAY
CITY WATER (GALLONS)
61.2
86.3
91.7
167.6
99
169
60
74
99
478
47
103
89
934
GPD
BACKWASH PUMP (GAL.)
759.0
519.9
519.6
1,038.9
649
1,037
389
468
1,933
1,657
129
303
449
758
GPD
EFFLUENT LABS
Fe (mg/L)
1.52
0.31
0.56
1.16
0.26
0.66
0.02
0.19
1.4
0.2
0.41
0.18
0.52
0.26
0.5
mg/L
pH
6.46
6.4
7
6.6
6.91
6.71
6.73
7
6.76
7
6.7
7
6.52
7
7
m/L
ORP
128
84
118
190
89
117
219
95
90
170
121
174
85
235
137
mV
COND
1,430
1,244
1433
1713
1240
1152
1302
1,225
1,540
1,401
1,340
1,260
1,533
1,190
1,352
uS/cm
TDS(mg/L)
1029
886
1026
1238
892.3
839.2
935.7
876
1,125
999
954
895
1,098
843
969.9
mg/L
TSS (mg/L)
18
4
0
24
3
4
15
1
17
2
2
12
16
1
8
mg/L
COD (mg/L)
123
85
71
78
mg/L
WELL LEVELS
Elevation
Change
O W DR-4
682.16
OWDR-2
681.90
677.86
679.82
677.78
677.96
678.89
678.66
682.51
678.81
679.04
683.27
678.37
680.32
679.10
679.4
(2.49)
PWDR-1
689.23
658.60
658.45
658.67
658.70
658.71
658.70
658.61
658.71
658.72
684.48
658.71
658.74
658.60
660.6
(28.58)
OWDR-3
681.80
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.32
684.39
683.66
683.5
0.34
ESTIMATED LAKE LEVEL
682.6
681.9
681.5
681.5
681.4
682.2
682.4
682.6
682.3
682.0
681.9
681.8
681.67
682.21
682.0
(0.60)
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

SEABOARD Q1 2021
s
5
INF. LEACHATE (GALLONS)
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 Q1 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 Q1 2021
,fl
1,800
1,600
1,400
1,200
0
O
Fe (mg/L)
1,000
V
�pH
0
z
—TSS (mg/L)
800
u
--X—ORP
a
O
--I—COND
600
fTDS (mg/L)
400
F

SEABOARD Q1 2021
7!1 r%
16.0
14.0
12.0
W
a
ce
W
10.0
a
J_
a
--$--LS1 COMP RUN (HOURS)
8.0
z
2
fLS1 COMP LOAD (HOURS)
a
g
fLS2 COMP RUN (HOURS)
z
LS2 COMP LOAD (HOURS)
6.0
uELECTRICITY
(kW-Hr)
W
0
a
4.0
2.0

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
k
k
k
Step 1
Influent'
5.43
16.5
7.8
8.9
38.6
Mechanical
Effluent'
5.51
0.195
0.124
0.20
6.029
Treatment
System
% Contaminant Removal
<
98.8
98.4
97.7%
84.4%
Irrigation water
5,510
195
124
200
6,029
Drainage water
432
ND
ND
ND
432
Lys 2 (vol. scalingfactor,290)
Lys 7 (vol. scalingfactor,336)
480
ND
ND
17.3
497
Lys 8 vol. scalin actor,427
12.5
ND
ND
ND
12.5
Lys 9 vol. scalin actor, 352
524
ND
ND
ND
524
Step 2
Lys 10 (vol. scalin actor, 612)
875
ND
ND
ND
875
Phyto-
Lys 11A vol. scalin actor; 484
185
ND
ND
ND
185
remediation
Lys 11B vol. scalin actor, 822)
295
ND
ND
ND
295
System
Lys 12E vol. scalin actor, 349)
320
ND
ND
2.2
322
Lys 12W vol. scalin actor, 372
15.4
ND
ND
0.52
16
Lys 13E vol. scalin actor, 216)
--
--
--
--
--
Lys 13W vol. scalin actor, 219
99.4
ND
ND
ND
99.4
Lys 14 (vol. scaling factor, 270)
5.2
ND
ND
ND
5.2
Lys 15 vol. scalingfactor, 1,191
94.0
ND
ND
(324)*
94.0
Average (n=13)
257
ND
ND
1.7
258
Step 2
% Contaminant Removal
95.3%
100%
100%
99.2%
95.7%
Overall Percent Contaminant Removal
95.3%
100%
100%
99.98%
99.3%
' 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, as expected.