4101_Guilford_HighPoint_MSWLF_Seaboard_RemedialProgressReport_FID1608157_20210901

SEABOARD GROUP II AND THE CITY OF HIGH POINT
September 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 Second 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 Second Quarter
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and the
closed Riverdale Drive Landfill located in Jamestown, NC.
During the second quarter of 2021 the mechanical and phytoremediation treatment systems
processed 3,485,364 gallons of extracted groundwater and leachate. Also during the second
quarter of 2021 the following shutdown exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
May 8, 2021
1.5 days
Automatic — Power failure
May 16, 2021
1.0 day
Clogged P703 Lines cleared lines
May 30, 2021
1.0 day
Automatic — Power failure
June 1, 2021
1.0 day
Automatic — Power Failure
June 6, 2021
1.0 day
P703 or media filter issue backwashed lines
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
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 -Q22021
INITIAL
WEEK
WEEK
WEEK
WEEK4
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
e
LEACHATE (GALLONS)
8,958,788
9,092,416
9,233,614
9,366,352
9,505,948
9,651,180
9,745,632
9,813,092
9,917,422
9,971,398
10,023,458
10,091,552
10,157,817
10,222,304
1,263,516
GALLONS
LSl-RWs (GALLONS)
7,125,336
7,204,968
7,285,867
7,359,585
7,442,519
7,516,076
7,567,270
7,622,854
7,708,203
7,755,129
7,796,995
7,875,562
7,952,332
8,039,599
914,263
GALLONS
PWDR1(GALLONS)
9,260,028
9,358,852
9,453,896
9,536,696
9,631,668
9,735,252
9,802,816
9,856,984
9,943,222
10,012,295
10,076,132
10,162,648
10,227,521
10,311,787
1,051,759
GALLONS
SIS-RWs(GALLONS)
3,086,374
3,114,773
3,141,328
3,164,676
3,191,455
3,219,460
3,239,816
3,254,760
3,278,281
3,296,636
3,313,717
3,336,152
3,355,900
3,377,264
290,890
GALLONS
PHYTO DISCH. (GALLONS)
9,006,200
9,345,324
9,682,584
9,984,204
10,317,707
10,651,986
10,887,541
11,078,359
11,382,664
11,571,825
11,750,668
12,006,642
12,234,503
12,491,564
3,485,364
GALLONS
AIR STRIP. RUNTIME (HRS)
11,491
11,659
11,827
11,976
12,144
12,334
12,474
12,573
12,738
12,872
13,014
13,182
13,349
13,517
2026 (92.8%)
HOURS
LSl COMP RUN (HOURS)
15,250
15,420
15,590
15,740
15,910
16,100
16,240
16,340
16,500
16,640
16,760
16,930
17,090
17,260
2,010
HOURS
LSl COMP LOAD (HOURS)
7,479
7,540
7,610
7,680
7,765
7,873
7,939
7,982
8,053
8,114
8,158
8,218
8,276
8,335
856
HOURS
LS2 COMP RUN (HOURS)
25,020
25,190
25,350
25,490
25,660
25,840
25,970
26,070
26,220
26,360
26,470
26,630
26,790
26,950
1,930
HOURS
LS2 COMP LOAD (HOURS)
2,769
2,790
2,812
2,831
2,852
2,876
2,894
2,906
2,926
2,942
2,956
2,987
3,005
3,023
254
HOURS
ELECT. UPPER (kW-Hr)
3,818
3,897
3,948
4,001
4,071
4,123
4,169
4,207
4,247
4,283
4,313
4,351
4,386
4,423
605
KW-HR
WATER METER (CF)
480,033
481,026
481,687
482,223
482,711
483,364
483,898
484,211
485,122
485,786
486,352
486,918
487,281
487,753
57,746
GALLONS
BACKWASH PUMP (GAL.)
547,234
552,686
556,319
559,044
561,761
565,390
567,858
569,671
575,113
578,743
582,375
585,092
586,904
589,624
42,390
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
777,031
798,778
820,559
839,631
860,921
882,198
897,170
908,053
926,512
938,597
949,707
964,347
979,826
997,822
220,791
GALLONS
ZONE 2
849,582
872,044
894,404
913,697
935,477
956,779
971,968
982,969
1,001,282
1,012,519
1,023,095
1,036,406
1,049,338
1,065,432
215,850
GALLONS
ZONE 3
905,134
929,912
954,711
976,250
1,000,615
1,024,370
1,041,582
1,055,143
1,078,275
1,092,118
1,104,738
1,121,436
1,136,995
1,156,143
251,009
GALLONS
ZONE
768,278
789,972
811,889
831,778
853,212
875,026
890,393
902,174
921,970
933,956
944,737
958,691
972,086
987,312
219,034
GALLONS
ZONE 5
879,774
903,513
927,262
948,398
971,500
995,309
1,012,317
1,020,520
1,046,442
1,059,429
1,071,163
1,086,952
1,101,577
1,119,708
239,934
GALLONS
ZONE 6
915,651
941,024
965,239
987,653
1,012,249
1,037,127
1,055,116
1,068,160
1,091,153
1,104,681
1,117,021
1,133,813
1,149,016
1,168,139
252,488
GALLONS
ZONE 7
897,903
922,760
947,090
968,952
993,279
1,017,442
1,034,290
1,046,707
1,067,934
1,081,061
1,092,796
1,108,539
1,123,055
1,140,329
242,426
GALLONS
ZONE 8
927,502
953,152
978,186
1,000,619
1,025,631
1,050,486
1,067,896
1,081,511
1,104,318
1,118,201
1,129,398
1,145,931
1,161,109
1,178,546
251,044
GALLONS
ZONE 9
870,209
893,979
917,240
937,621
960,339
982,824
997,723
1,010,185
1,029,137
1,041,475
1,052,355
1,066,805
1,080,015
1,096,147
225,938
GALLONS
ZONE 10
918,246
918,246
918,246
918,246
918,246
918,246
918,246
918,246
918,246
918,246
919,134
938,024
948,208
948,208
29,962
GALLONS
ZONE 11
440,619
440,619
440,619
440,619
440,619
440,619
440,619
440,619
440,619
440,619
440,966
449,027
453,913
453,913
13,294
GALLONS
ZONE 12
923,754
948,817
972,937
994,892
1,019,392
1,043,768
1,060,985
1,074,998
1,098,076
1,112,621
1,125,227
1,142,651
1,157,595
1,175,432
251,678
GALLONS
ZONE 13
791,081
811,082
831,240
848,999
869,695
888,092
901,471
911,978
928,689
939,205
949,726
962,482
974,312
988,425
197,344
GALLONS
ZONE 14
786,214
807,731
829,284
848,597
869,695
889,184
902,939
913,541
931,348
942,356
951,876
964,426
976,239
990,147
203,933
GALLONS
ZONE 15
902,811
926,738
950,949
972,518
996,070
1,019,824
1,035,940
1,048,255
1,069,465
1,082,234
1,093,535
1,108,718
1,122,867
1,139,911
237,100
GALLONS
Zone 16
815,973
839,184
862,612
883,285
906,078
928,875
944,664
956,877
977,908
989,446
1,002,380
1,017,255
1,030,478
1,045,567
229,594
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
100%
100%
89%
100%
99%
73%
83%
98%
70%
99%
100%
99%
100%
93%
Percent
AVERAGE FLOW (GPM)
33.6
33.5
29.9
33.1
29.0
20.4
26.5
30.2
16.4
20.7
25.4
22.6
25.5
26.7
GPM
EFF. DISCH. (GALLONS)
48,446
48,180
43,089
47,643
41,785
29,444
38,164
43,472
23,645
29,807
36,568
32,552
36,723
38,424
GPD
TOTAL INFLUENT (GALLONS)
48,640
49,099
44,658
49,183
43,797
29,196
38,431
42,777
23,541
29,141
36,516
32,522
36,769
38,790
GPD
INF. LEACHATE (GALLONS)
19,090
20,171
18,963
19,942
18,154
11,807
13,492
14,904
6,747
8,677
9,728
9,466
9,212
13,873
GPD
INF. LS1-RWs (GALLONS)
11,376
11,557
10,531
11,848
9,195
6,399
11,117
12,193
5,866
6,978
11,224
10,967
12,467
10,132
GPD
INF. PWDR) (GALLONS)
14,118
13,578
11,829
13,567
12,948
8,446
10,834
12,320
8,634
10,640
12,359
9,268
12,038
11,583
GPD
INF. SIS-RWs (GALLONS)
4,057
3,794
3,335
3,826
3,501
2,545
2,989
3,360
2,294
2,847
3,205
2,821
3,052
3,202
GPD
WEEKLY RUNTIME (DAYS)
7.0
7.0
6.2
7.0
6.9
5.1
5.8
6.9
4.9
6.9
7.0
7.0
7.0
6.5
DAYS/WK
LSl COMP RUN (HOURS)
24.3
24.3
21.4
24.3
23.8
17.5
20.0
22.9
17.5
20.0
24.3
22.9
24.3
22.1
HRS/DAY
LSl COMP LOAD (HOURS)
8.7
10.0
10.0
12.1
13.5
8.3
8.6
10.1
7.6
7.3
8.6
8.3
8.4
9.4
HRS/DAY
LS2 COMP RUN (HOURS)
24.3
22.9
20.0
24.3
22.5
16.3
20.0
21.4
17.5
18.3
22.9
22.9
22.9
21.2
HRS/DAY
LS2 COMP LOAD (HOURS)
3.0
3.1
2.7
3.0
3.0
2.3
2.4
2.9
2.0
2.3
4.4
2.6
2.6
2.8
HRS/DAY
ELECTRICITY(kW-Hr)
11.3
7.3
7.6
10.0
6.5
5.8
7.6
5.7
4.5
5.0
5.4
5.0
5.3
6.7
kW-HR/DAY
CITY WATER (GALLONS)
142.0
94.0
77.0
70.0
82
67
63
130
83
94
81
52
67
634
GPD
BACKWASH PUMP (GAL.)
779.0
519.0
389.0
388.0
454
309
363
777
454
605
388
259
389
467
GPD
EFFLUENT LABS
Fe (mg/L)
0.26
0.22
0.07
0.02
0.06
0.03
2.17
1.40
0.2
0.2
0.09
0.09
0.05
0.08
0.4
mg/L
pH
6.5
6.9
6.5
6.65
6.93
6.8
6.27
6
6.8
7
6.43
6
6.69
7
7
m/L
ORP
235
146
93
181
187
169
215
162
195
243
221
86
187
79
166
mV
COND
1,190
1,285
1458
1353
1573
1321
1480
1,497
1,269
1,216
1,084
1,146
1,200
1,024
1,300
uS/cm
TDS(mg/L)
843
913
1037
959
1125
930.7
1052
1,057
889
851
748
798
837
709
916.0
mg/L
TSS (mg/L)
1
3
3
13
0.2
7
12
13
6
5
3
3
5
mg/L
WELL LEVELS
Elevation
Change
O W DR-4
682.16
658.61
657.66
OWDR-2
681.90
678.76
678.76
678.27
679.40
678.60
679.46
679.73
678.64
680.86
678.67
679.1
(2.49)
PWDR-1
689.23
658.58
658.66
658.70
658.73
658.47
658.75
658.70
658.78
674.71
658.70
660.3
(28.58)
OWDR-3
681.80
686.67
686.67
686.67
686.67
686.67
686.67
686.67
686.67
686.67
686.67
686.7
PW-6D (696.79)
680.37
684.78
684.78
684.78
684.78
684.78
684.78
684.78
684.78
684.78
684.78
684.8
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
683.72
682.86
683.42
683.03
683.22
683.3
0.34
ESTIMATED LAKE LEVEL
682.6
681.6
681.6
681.3
681.1
680.0
681.4
681.27
681.21
681.2
(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
1 LS-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 Q2 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 Q2 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 Q2 2021
9 A
1,800
1,600
1,400
1,200
O
Fe (mg/L)
1,000
o
pH
p
TSS (mg/L)
z
800
00
--0(-0RP
oac
--I—COND
O
tTDS (mg/L)
600
400
F

SEABOARD Q2 2021
7!1 r%
12.0
10.0
W
a
8.0 w
a
J_
a
-4--LS1 COMP RUN (HOURS)
z
6.0 2
fLS1 COMP LOAD (HOURS)
a
g
fLS2 COMP RUN (HOURS)
z
LS2 COMP LOAD (HOURS)
O
ELECTRICITY (kW-Hr)
4.0 �
O
a
PX1]

Water Treatment System
1,4 Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
k
k
Step 1
Influent'
8.33
29.9
15.0
13.7
66.9
Mechanical
Effluent'
8.28
0.085
0.072
0.042
8.5
Treatment
System
o
Contaminant Removal
0
0.6/0
99.7%
o
99.5/0
99.7
0
87.3/0
Irrigation water
8,278
85
72
42
8,477
Drainage water
950
ND
ND
ND
950
Lys 2 (vol. scaling factor, 430)
Lys 7 (vol. scaling factor, 357)
317
ND
ND
7.1
324
Lys 8 vol. scalin actor, 398
22
ND
ND
ND
22
Lys 9 vol. scalin actor, 630
176
ND
ND
ND
176
Step 2
Lys 10 vol. scalingfactor, 11,346
2,314
ND
ND
ND
2,314
Phyto-
Lys 11A vol. scalingfactor, 11,000
209
ND
ND
ND
209
remediation
Lys 1113 (vol. scalingfactor, 11,647
1,642
ND
ND
ND
1,642
System
Lys 12E (vol. scalin actor; 337)
160
ND
ND
1.6
162
Lys 12W (vol. scalin actor, 376)
14
ND
ND
ND
14
Lys 13E (vol. scaling factor, 678)
(6,283)*
ND
ND
13.6
14
Lys 13W (vol. scalin actor, 974)
420
ND
ND
ND
420
Lys 14 (vol. scaling factor, 231)
31
ND
ND
ND
31
Lys 15 vol. scalingfactor, 2,018
60
ND
ND
436 *
60
Averse
g
526
(n = 12)
ND
(n = 13)
ND
(n = 13)
1.9
(n = 12)
488
Step 2
% Contaminant Removal
93.6%
100%
100%
95.5/0
94.2/
Overall Percent Contaminant Removal
93.7%
100%
100%
99.98%
99.3%
* The data indicated in parentheses were not included in the calculation of percent contaminant removal. Lysimeter 13E yielded
aberrant results for 1,4-dioxane; Lysimeter 15 yielded aberrant results for "other organics".
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.