4101_Guilford_HighPoint_Seaboard_MSWLF_RemedialProgressReport_FID1529840_20210215

SEABOARD GROUP II AND THE CITY OF HIGH POINT
February 15, 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, 2020 Fourth 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 2020 Fourth Quarter
Remedial Action Progress Report for the former Seaboard Chemical Corporation facility and the
closed Riverdale Drive Landfill located in Jamestown, NC.
During the fourth quarter of 2020 the mechanical and phytoremediation treatment systems
processed 4,159,898 gallons of extracted groundwater and leachate. Also during the fourth
quarter of 2020 the following shutdown exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
October 18, 2020
1.3 days
Automatic, high voltage
October 29, 2020
1.1 days
Automatic, power failure Hurricane Zeta
November 7, 2020
1.7 days
Automatic, bad sensor in lime tank
December 13, 2020
1.5 days
Automatic, VFD failure, part replaced
December 25, 2020
3.0 days
Automatic, low level T-121 — PID loop error
No extended shutdowns occurred during the fourth quarter of 2020 due to system operations.

The attached figures provide the results of the full scale operation of the treatment system during
the fourth quarter of 2020, 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, P.G. (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
ccoslett@demaximis. com.
Respectfully,
Seaboard Group II and City of High Point
-"'I '4�7 za--
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 -Q42020
INITIAL
WEEK
WEEK
WEEK
WEEK4
WEEKS
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
LEACHATE (GALLONS)
5,630,146
5,754,888
5,876,097
6,005,811
6,130,419
6,243,393
6,350,049
6,504,215
6,672,000
6,861,229
6,968,117
7,096,065
7,292,300
7,401,221
1,771,075
GALLONS
LSl-RWs (GALLONS)
5,474,863
5,538,895
5,607,203
5,672,914
5,734,248
5,753,857
5,812,379
5,881,689
5,964,977
6,058,129
6,107,391
6,171,752
6,251,043
6,298,999
824,136
GALLONS
PWDR1(GALLONS)
6,834,783
6,944,138
7,048,906
7,150,935
7,245,935
7,347,086
7,432,096
7,536,348
7,649,066
7,776,644
7,845,326
7,936,393
8,043,867
8,112,008
1,277,225
GALLONS
SIS-RWs(GALLONS)
2,442,670
2,468,142
2,489,912
2,515,520
2,538,120
2,550,134
2,570,686
2,597,733
2,628,716
2,662,776
2,681,991
2,707,829
2,740,576
2,760,906
318,236
GALLONS
PHYTO DISCH. (GALLONS)
1,086,370
1,412,143
1,725,107
2,043,119
2,345,390
2,592,586
2,870,387
3,230,851
3,624,336
4,062,686
4,298,770
4,605,367
5,010,331
5,246,268
4,159,898
GALLONS
AIR STRIP. RUNTIME (HRS)
7,743
7,893
8,040
8,178
8,305
8,443
8,562
8,702
8,869
9,061
9,166
9,304
9,466
9,572
1829 (83.7%)
HOURS
LSl COMP RUN (HOURS)
11,570
11,720
11,870
12,010
12,130
12,270
12,390
12,530
12,700
12,900
13,000
13,140
13,300
13,400
1,830
HOURS
LSl COMP LOAD (HOURS)
5,986
6,045
6,101
6,157
6,211
6,257
6,307
6,373
6,448
6,534
6,580
6,638
6,715
6,759
773
HOURS
LS2 COMP RUN (HOURS)
21,540
21,680
21,820
21,960
22,080
22,140
22,240
22,370
22,530
22,720
22,820
22,950
23,100
23,210
1,670
HOURS
LS2 COMP LOAD (HOURS)
2,318
2,334
2,354
2,372
2,388
2,396
2,410
2,427
2,448
2,472
2,485
2,502
2,523
2,536
218
HOURS
ELECT. UPPER (kW-Hr)
1,857
1,898
1,936
1,981
2,019
2,057
2,118
2,165
2,245
2,343
2,405
2,488
2,590
2,687
830
KW-HR
WATER METER (CF)
459,430
460,162
460,877
461,587
462,441
462,938
463,398
464,124
465,113
465,947
466,308
466,910
467,832
468,754
69,744
GALLONS
BACKWASH PUMP (GAL.)
427,423
432,016
436,602
441,190
446,689
449,436
452,184
456,762
462,248
467,734
469,559
473,208
477,769
480,499
53,076
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
346,833
366,406
385,625
404,223
421,774
436,688
453,087
474,034
496,823
521,360
534,558
551,759
574,555
588,190
241,357
GALLONS
ZONE 2
375,222
394,389
413,220
431,510
449,113
463,907
480,257
501,470
524,624
550,819
564,822
582,760
606,720
620,484
245,262
GALLONS
ZONE 3
383,091
403,960
424,619
444,806
463,921
480,025
497,647
520,827
546,181
574,005
289,220
608,912
635,083
649,807
266,716
GALLONS
ZONE
326,722
344,387
361,870
378,630
394,423
407,942
422,577
442,078
463,212
487,239
500,151
516,725
538,630
551,304
224,582
GALLONS
ZONE 5
371,680
391,756
411,555
430,884
449,325
464,510
481,316
503,459
528,360
555,769
570,561
589,468
614,698
629,233
257,553
GALLONS
ZONE 6
385,998
407,141
427,908
448,122
467,582
483,290
501,275
524,432
550,611
579,526
594,862
614,573
640,405
655,523
269,525
GALLONS
ZONE 7
387,113
407,627
427,134
447,336
465,938
481,435
498,836
521,205
546,410
573,977
589,418
608,283
633,884
648,952
261,839
GALLONS
ZONE 8
394,457
415,479
436,327
457,007
476,741
492,510
510,749
534,271
560,499
589,368
605,170
625,595
652,264
668,139
273,682
GALLONS
ZONE 9
408,228
428,716
449,020
468,820
487,653
503,428
527,739
543,156
567,745
593,800
607,891
626,869
651,680
666,883
258,655
GALLONS
ZONE 10
421,688
445,093
467,830
491,118
512,216
529,955
549,849
575,706
604,241
635,550
652,740
675,144
704,065
721,393
299,705
GALLONS
ZONE 11
218,316
228,953
239,684
250,110
259,895
267,883
276,801
288,530
301,603
315,368
322,684
332,434
345,420
353,063
134,747
GALLONS
ZONE 12
391,180
413,227
434,801
456,112
476,327
492,745
511,540
536,104
562,811
591,630
607,586
628,383
655,598
671,607
280,427
GALLONS
ZONE 13
340,068
357,808
375,375
392,889
409,170
422,939
438,389
458,235
480,497
504,712
518,093
535,178
557,320
570,600
230,532
GALLONS
ZONE 14
327,551
344,948
361,908
378,523
394,206
407,363
422,085
441,185
462,299
485,505
498,130
514,568
536,131
549,008
221,457
GALLONS
ZONE 15
373,612
394,669
415,010
435,241
454,254
469,912
487,193
510,291
535,528
563,970
579,356
599,297
624,941
640,581
266,969
GALLONS
Zone 16
326,534
345,945
364,947
383,062
400,736
415,217
431,561
452,490
475,626
500,906
515,055
533,308
557,102
571,492
244,958
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
89%
88%
82%
76%
82%
71%
83%
99%
100%
73%
82%
96%
55%
83%
Percent
AVERAGE FLOW (GPM)
32.3
31.0
31.5
30.0
24.5
27.6
35.8
39.0
38.1
27.3
30.4
40.2
20.5
31.4
GPM
EFF. DISCH. (GALLONS)
46,539
44,709
45,430
43, 182
35,314
39,686
51,495
56,212
54,794
39,347
43,800
57,852
29,492
45,219
GPD
TOTAL INFLUENT (GALLONS)
46,229
45,151
46,152
43,363
35,107
38,677
50,682
56,396
55,502
40,675
44,173
59,392
30,669
45,551
GPD
INF. LEACHATE (GALLONS)
17,820
17,316
18,531
17,801
16,139
15,237
22,024
23,969
23,654
17,815
18,278
28,034
13,615
19,249
GPD
INF. LS1-RWs (GALLONS)
9,147
9,758
9,387
8,762
2,801
8,360
9,901
11,898
11,644
8,210
9,194
11,327
5,995
8,953
GPD
INF. PWDR) (GALLONS)
15,622
14,967
14,576
13,571
14,450
12,144
14,893
16,103
15,947
11,447
13,010
15,353
8,518
13,892
GPD
INF. SIS-RWs (GALLONS)
3,639
3,110
3,658
3,229
1,716
2,936
3,864
4,426
4,258
3,203
3,691
4,678
2,541
3,458
GPD
WEEKLY RUNTIME (DAYS)
6.3
6.1
5.8
5.3
5.8
5.0
5.8
7.0
8.0
4.4
5.8
6.8
4.4
5.9
DAYS/WK
LSl COMP RUN (HOURS)
21.4
21.4
20.0
17.1
20.0
17.1
20.0
24.3
25.0
16.7
20.0
22.9
12.5
19.9
HRS/DAY
LSl COMP LOAD (HOURS)
8.4
8.0
8.0
7.7
6.6
7.1
9.4
10.7
10.8
7.7
8.3
11.0
5.5
8.4
HRS/DAY
LS2 COMP RUN (HOURS)
20.0
20.0
20.0
17.1
8.6
14.3
18.6
22.9
23.8
16.7
18.6
21.4
13.8
18.1
HRS/DAY
LS2 COMP LOAD (HOURS)
2.3
2.9
2.6
2.3
1.1
2.0
2.4
3.0
3.0
2.2
2.4
3.0
1.6
2.4
HRS/DAY
ELECTRICITY(kW-Hr)
5.9
5.4
6.4
5.4
5.4
8.7
6.7
11.4
12.3
10.3
11.9
14.6
12.1
9.0
kW-HR/DAY
CITY WATER (GALLONS)
105.0
102.0
101.0
122.0
71
66
104
141
104
60
86
132
115
753
GPD
BACKWASH PUMP (GAL.)
656.0
655.0
655.0
786.0
392
393
654
784
686
304
521
652
341
575
GPD
EFFLUENT LABS
Fe (mg/L)
0.48
0.68
0.36
0.58
0.55
0.85
0.83
0.54
1.1
1.5
1.2
0.55
0.68
1.52
0.8
mg/L
pH
6.28
6.71
6.75
6.21
6.17
6.12
6.26
6
6.39
6
6.45
6
6.07
6
6
m/L
ORP
107
92
87
97
110
207
74
152
119
237
240
238
144
128
148
mV
COND
1,237
1,584
1160
1170
1287
1192
1644
1,212
1,816
3,454
1,640
1,285
1,310
1,430
1,553
uS/cm
TDS (mg/L)
869
1,131
811.8
826.2
909.8
846.1
1168
857
1,346
1,309
1,147
912
934
1,029
1,017.0
mg/L
TSS (mg/L)
1
3
3
3
1
5
2
3
1
4
5
8
18
4
mg/L
COD (mg/L)
77
60
59
61
77
65
72
51
101
411
65
74
83
123
100
mg/L
WELL LEVELS
Elevation
Change
O W DR-4
682.16
OWDR-2
681.90
675.92
677.90
677.14
676.57
677.72
676.97
677.02
677.54
678.75
679.82
677.79
677.37
677.5
(4.36)
PWDR-1
689.23
658.66
658.62
658.74
658.75
658.73
658.73
658.71
658.69
658.67
658.72
658.78
659.02
658.7
(30.49)
OWDR-3
681.80
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.41
682.53
682.28
681.86
682.60
682.41
682.3
(0.77)
ESTIMATED LAKE LEVEL
682.6
682.1
681.4
681.4
681.4
681.81
681.61
681.8
(0.78)
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
ECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
USRECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES

70000
50000
LA
z
O
J
J
Q
40000
O
J
LL
}
J_
Q
30000
LU
C7
a
w
a
20000
10000
C�7
SEABOARD Q4 2020
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
8
7
R,
5 - INF. LEACHATE (GALLONS)
—M— INF. LS1-RWs (GALLONS)
—* INF. PWDR1 (GALLONS)
4 --X— INF. SIS-RWs (GALLONS)
EFF. DISCH. (GALLONS)
3 WEEKLY RUNTIME (DAYS)
2
1
w

695.00
J
W
J 675.00
J
J
W
I-10 1111
665.00
655.00
SEABOARD Q4 2020
0 1 2 3 4 5 6 7
WEEK
8 9 10 11 12 13
OWDR-4
OWDR-2
PWDR-1
OWDR-3
PW-6D (696.79)
tOWLFS-2
tPW-16D
DPW-15D
ESTIMATED LAKE LEVEL

SEABOARD Q4 2020
4,000
3,500
3,000
2,500
O
Fe (mg/L)
o
fpH
2,000 p
--+—TSS (mg/L)
z
O
U
--X--ORP
oac
-I-COND
1,500 O
fTDS (mg/L)
COD (mg/L)
1,000
500

16.0
14.0
12.0
W
a
ce
W
10.0
a
J_
Q
--$--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'
7.55
27.0
11.2
13.7
59.5
Mechanical
Effluent'
7.08
0.33
0.18
0.24
7.83
Treatment
System
o
Contaminant Removal
0
6./2
98.8%
98.4.
98.2
86.8
Irrigation water
7,080
330
180
240
7,830
Drainage water
209
ND
ND
ND
209
Lys 2 (vol. scaling factor,296)
Lys 7 (vol. scalingfactor,257)
1,063
ND
ND
95.6
1,158
Lys 8 vol. scalin actor,366
ND
ND
ND
ND
ND
Lys 9 vol. scalin actor, 251
99
ND
ND
36.4
135
Step 2
Lys 10 (vol. scalin actor, 230)
262
ND
ND
ND
262
Phyto-
Lys 11A vol. scalin actor; 306
51
ND
ND
ND
51
remediation
Lys 11B vol. scalin actor, 594)
324
ND
ND
ND
324
System
Lys 12E vol. scalin actor, 169)
259
ND
ND
ND
259
Lys 12W vol. scalin actor, 271
17.6
ND
ND
ND
17.6
Lys 13E vol. scalin actor, 180)
33.1
ND
ND
0.54
33.6
Lys 13W vol. scalin actor, 186
48.4
ND
ND
ND
48.4
Lys 14 (vol. scalin actor, 199)
--
--
--
--
--
Lys 15 (vol. scalin actor, 893)
45.8
ND
ND
(1,196)*
45.8
Average (n=13)
185
ND
ND
10.2
195.6
Step 2
Contaminant Removal
97.4%
100%
100%
95.7%
97.5%
Overall Percent Contaminant Removal
97.5%
100%
100%
99.92%
99.67%
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.