4101_Guilford_HighPoint_MSWLF_Seaboard_RemedialProgressReport_FID1704203_20220805

SEABOARD GROUP II AND THE CITY OF HIGH POINT
August 5, 2022
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, 2022 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 2022 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 2022 the mechanical and phytoremediation treatment systems
processed 2,985,745 gallons of extracted groundwater and leachate. Also during the second
quarter of 2022 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
June 3, 2022
3.0 days
Hydraulic system failure to sludge drying boxes
June 10, 2022
4.5 days
Hydraulic system failure to sludge drying boxes
Also, blower motor failure to air stripper
June 17, 2022
3.5 days
Power failure from storms resulting in PLC issues
June 25, 2022
2.0 days
Differential pressure in bag filters
The additional remedial activities outlined in approved Technical Memorandum E-11 (TM-E-11)
have been implemented and are operable. The two extraction wells at the former Seaboard Pond
3 Area (R-1 and PW-SF1) and the SIS Basin Area (RW-SIS7 and RW-SIS8) have been
incorporated into the remedial system and are performed as expected. For the purposes of the
quarterly Extraction System Evaluation Monitoring, a start date of the last week in June 2022
will be used. The first quarterly evaluation samples will be collected during the last week of
September 2022.
Repairs have been completed for an erosion control structure on the western lobe of the
phytoremediation zone. These repairs included stabilization of drainage channels entering the
control structure, planting of loblolly pines to reduce soil moisture levels, and replacement of a
slope drain. Photographs of these repairs are attached to this correspondence.

The design of the irrigation line replacements has been completed and acquisition of the
materials needed for the work has begun. The clearing and site preparation work will begin this
fall with an estimated completion date of the first quarter of 2023.
The batteries and charge controllers have been replaced at each of the groundwater level
transducers. The transducers are operable, however, communication errors are still occurring
between the radios and the PLC system. If the existing radios cannot be repaired, a new
communication system will be required.
The attached figures provide the results of the full scale operation of the treatment system during
the first quarter of 2022, including: Operating Data, Process Flow Data, Static Water Level Data,
System Chemistry, Utility Use Data, and Contaminant Mass Removal.
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
Robby Stone - 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

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SEABOARD GROUP II & THE CITY OF HIGH POINT
Quarterly
Units of
QUARTERLY LOG -Q22022
INITIAL
WEEK
WEEK
WEEK
WEEK4
WEEKS
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
e
LEACHATE (GALLONS)
3,561,096
3,660,150
3,744,253
3,817,823
3,890,644
3,935,411
3,937,451
3,955,576
4,018,762
4,109,083
4,127,279
4,150,450
4,174,923
4,212,611
651,515
GALLONS
LSl-RWs (GALLONS)
1,083,836
1,157,872
1,245,519
1,338,474
1,427,305
1,492,775
1,545,381
1,598,345
1,668,933
1,769,659
1,806,650
1,898,478
1,938,543
2,051,047
967,211
GALLONS
PWDR1(GALLONS)
3,011,398
3,081,262
3,149,362
3,217,982
3,289,698
3,357,358
3,423,978
3,491,272
3,548,225
3,625,243
3,654,209
3,703,419
3,725,121
3,774,338
762,940
GALLONS
SIS-RWs(GALLONS)
4,192,384
4,236,282
4,270,829
4,296,874
4,324,619
4,376,541
4,443,372
4,507,503
4,564,158
4,649,008
4,678,063
4,727,310
4,748,518
4,792,133
599,749
GALLONS
PHYTO DISCH. (GALLONS)
2,479,459
2,758,384
3,031,440
3,293,648
3,562,493
3,794,705
3,983,085
4,189,899
4,439,395
4,791,558
4,905,277
5,116,202
5,221,938
5,465,204
2,985,745
GALLONS
AIR STRIP. RUNTIME (HRS)
19,556
19,724
19,884
20,051
20,219
20,382
20,543
20,711
20,850
21,042
21,115
21,178
21,234
21,359
1803 (82.6%)
HOURS
LSl COMP RUN (HOURS)
23,330
23,500
23,660
23,820
23,990
24,160
24,330
24,500
24,640
24,830
24,900
25,020
25,080
25,210
1,880
HOURS
LSl COMP LOAD (HOURS)
10,830
10,910
10,980
11,040
11,130
11,210
11,240
11,280
11,330
11,410
11,430
11,480
11,500
11,560
730
HOURS
LS2 COMP RUN (HOURS)
32,470
32,630
32,790
32,960
33,130
33,290
33,460
33,620
33,760
33,960
34,070
34,190
34,250
34,370
1,900
HOURS
LS2 COMP LOAD (HOURS)
3,754
3,776
3,804
3,832
3,866
3,908
3,959
4,010
4,054
4,099
4,127
4,163
4,180
4,214
460
HOURS
ELECT. UPPER (kW-Hr)
6,659
6,722
6,780
6,824
6,882
6,930
6,975
7,020
7,062
7,116
7,147
7,188
7,210
7,251
592
KW-HR
WATER METER (CF)
514,122
514,582
514,832
515,056
515,438
515,786
516,104
516,339
516,986
517,485
517,665
517,878
517,938
518,702
34,258
GALLONS
BACKWASH PUMP (GAL.)
728,331
731,073
732,064
732,984
734,815
736,648
738,479
739,391
743,051
745,796
746,708
747,671
747,676
751,961
23,630
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
1,600,305
1,618,281
1,634,933
1,651,400
1,668,892
1,683,216
1,695,621
1,709,166
1,723,919
1,743,513
1,750,498
1,761,826
1,768,044
1,781,249
180,944
GALLONS
ZONE 2
1,633,908
1,633,908
1,633,908
1,633,908
1,633,908
1,633,908
1,633,908
1,633,908
1,642,004
1,662,670
1,669,466
1,681,800
1,688,272
1,702,606
68,698
GALLONS
ZONE 3
1,903,036
1,923,564
1,941,805
1,960,485
1,981,065
1,999,052
2,013,363
2,029,524
2,047,001
2,071,312
2,079,759
2,094,489
2,102,437
2,120,065
217,029
GALLONS
ZONE
1,531,542
1,549,414
156,601
1,582,270
1,598,044
1,611,207
1,621,657
1,633,247
1,645,568
1,663,553
1,669,694
1,680,808
1,686,636
1,699,589
168,047
GALLONS
ZONE 5
1,766,470
1,791,676
1,816,203
1,838,468
1,860,516
1,879,265
1,894,129
1,911,188
1,928,426
1,954,486
1,963,100
1,978,766
1,986,279
2,003,409
236,939
GALLONS
ZONE 6
1,896,345
1,921,076
1,944,791
1,965,949
1,987,767
2,006,791
2,021,941
2,038,428
2,056,007
2,082,278
2,090,839
2,106,172
2,113,976
2,132,456
236,111
GALLONS
ZONE 7
1,814,472
1,839,267
1,862,536
1,884,060
1,906,238
1,925,184
1,939,509
1,956,424
1,974,384
2,000,915
2,009,945
2,026,413
2,034,597
2,053,502
239,030
GALLONS
ZONE 8
1,886,297
1,909,654
1,931,378
1,952,335
1,973,488
1,992,330
2,007,778
2,023,998
2,040,337
2,065,238
2,073,866
2,089,334
2,097,769
2,118,745
232,448
GALLONS
ZONE 9
1,343,076
1,343,076
1,343,076
1,343,076
1,343,076
1,343,076
1,343,076
1,343,076
1,350,665
1,354,156
1,354,156
1,354,156
1,354,156
1,354,156
11,080
GALLONS
ZONE 10
1,252,399
1,252,399
1,252,399
1,252,399
1,252,399
1,252,399
1,252,399
1,252,399
1,261,141
1,265,929
1,265,929
1,265,929
1,265,929
1,265,929
13,530
GALLONS
ZONE 11
794,405
794,405
799,764
810,260
822,347
834,046
843,567
853,300
863,586
880,594
886,094
895,586
900,618
912,130
117,725
GALLONS
ZONE 12
1,911,889
1,938,559
1,964,047
1,987,593
2,010,845
2,030,908
2,047,458
2,064,769
2,083,973
2,111,534
2,120,829
2,136,487
2,144,949
2,164,421
252,532
GALLONS
ZONE 13
1,560,948
1,580,858
1,599,956
1,617,173
1,634,660
1,649,360
1,660,969
1,675,866
1,691,332
1,714,640
1,722,293
1,737,186
1,743,810
1,760,085
199,137
GALLONS
ZONE 14
1,486,404
1,502,871
1,517,531
1,532,102
1,547,106
1,559,542
1,569,482
1,580,086
1,591,065
1,607,823
1,613,408
1,623,342
1,628,604
1,640,764
154,360
GALLONS
ZONE 15
1,823,260
1,847,159
1,869,922
1,891,043
1,912,446
1,931,352
1,946,997
1,963,746
1,982,581
2,009,025
2,017,561
2,032,873
2,041,119
2,059,094
235,834
GALLONS
ZONE 16
1,642,824
1,663,871
1,683,245
1,701,599
1,720,024
1,736,037
1,748,899
1,764,564
1,781,580
1,804,011
1,811,501
1,824,928
1,831,225
1,846,165
203,341
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
100%
95%
99%
100%
97%
96%
100%
83%
100%
51%
38%
33%
74%
82%
Percent
AVERAGE FLOW (GPM)
27.7
27.1
26.0
26.7
23.0
18.7
20.5
24.8
30.6
13.2
20.9
10.5
24.1
22.6
GPM
EFF. DISCH. (GALLONS)
39,846
39,008
37,458
38,406
33,173
26,911
29,545
35,642
44,020
18,953
30,132
15,105
34,752
32,535
GPD
TOTAL INFLUENT (GALLONS)
40,979
39,200
37,313
37,302
32,831
26,871
28,931
35,340
44,114
18,868
30,494
15,350
34,718
32,485
GPD
INF. LEACHATE (GALLONS)
14,151
12,015
10,510
10,403
6,395
291
2,589
9,027
11,290
3,033
3,310
3,496
5,384
7,069
GPD
INF. LS1-RWs (GALLONS)
10,577
12,521
13,279
12,690
9,353
7,515
7,566
10,084
12,591
6,165
13,118
5,724
16,072
10,558
GPD
INF. PWDR) (GALLONS)
9,981
9,729
9,803
10,245
9,666
9,517
9,613
8,136
9,627
4,828
7,030
3,100
7,031
8,331
GPD
INF. SIS-RWs (GALLONS)
6,271
4,935
3,721
3,964
7,417
9,547
9,162
8,094
10,606
4,843
7,035
3,030
6,231
6,527
GPD
WEEKLY RUNTIME (DAYS)
7.0
6.7
7.0
7.0
6.8
6.7
7.0
5.8
7.0
3.5
2.6
2.3
5.2
5.7
DAYS/WK
LSl COMP RUN (HOURS)
24.3
22.9
22.9
24.3
24.3
24.3
24.3
20.0
23.8
11.7
17.1
8.6
18.6
20.5
HRS/DAY
LSl COMP LOAD (HOURS)
11.4
10.0
8.6
12.9
11.4
4.3
5.7
7.1
10.0
3.3
7.1
2.9
8.6
7.9
HRS/DAY
LS2 COMP RUN (HOURS)
22.9
22.9
24.3
24.3
22.9
24.3
22.9
20.0
25.0
18.3
17.1
8.6
17.1
20.8
HRS/DAY
LS2 COMP LOAD (HOURS)
3.1
4.0
4.0
4.9
6.0
7.3
7.3
6.3
5.6
4.7
5.1
2.4
4.9
5.0
HRS/DAY
ELECTRICITY(kW-Hr)
9.0
8.3
6.3
8.3
6.9
6.4
6.4
6.0
6.8
5.2
5.9
3.1
5.9
6.5
kW-HR/DAY
CITY WATER (GALLONS)
65.7
35.7
32.0
54.6
50
45
34
92
62
30
30
9
109
374
GPD
BACKWASH PUMP (GAL.)
391.7
141.6
131.4
261.6
262
262
130
523
343
152
138
1
612
258
GPD
EFFLUENT LABS
Fe (mg/L)
0.4
0.3
0.40
0.4
0.38
0.49
0.54
0.24
1.0
0.2
1.17
1.12
0.56
0.68
0.6
mg/L
pH
6.2
6
6.3
6.1
6.23
6.24
5.83
6
6
6
6
6
6
6
6.2
m/L
ORP
286
284
292
283
279
97
221
259
260
276
261
240
248
260
250.8
mV
COND
994.4
1315
1311
1316
1304
1789
1333
1270
1351
1303
1262
1488
1273
1316
1356.2
uS/cm
TDS(mg/L)
994.4
935
933
933
925
1284
929
889.7
950.6
915.2
880.6
1089
894
922
960.0
mg/L
TSS (mg/L)
0
1
1
3
1
5
4
0
18
0
17
6
9
5
5.4
mg/L
WELL LEVELS
Elevation
Change
OWDR-4
682.16
679.72
679.52
679.68
679.68
679.62
679.64
679.65
679.44
679.69
682.25
678.93
682.03
681.73
680.1
(2.04)
OWDR-2
681.90
679.93
679.72
679.89
679.89
679.83
679.84
679.86
679.64
679.90
682.55
679.08
682.34
682.02
680.3
(1.55)
PWDR-1
689.23
658.71
658.65
658.72
658.73
658.70
658.76
658.72
658.64
658.67
683.25
658.72
683.09
682.59
664.3
(24.93)
OWDR-3
681.80
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
ESTIMATED LAKE LEVEL
682.55
681.6
681.5
681.4
681.4
681.3
681.4
681.2
681.25
680.67
681.3
(1.24)
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO
LEACHATE (LCHT)
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO
LS-1 RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO
SIS RECOVERY WELLS
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO

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 Q2 2022
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 Q2 2022
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 2022
,fl
r m
1,800
1,600
1,400
1,200
p
Fe (mg/L)
z
pH
1,000 O
k
--�--TSS (mg/L)
a
0
—0—ORP
800
--I—COND
fTDS (mg/L)
600
400
w

SEABOARD Q2 2022
10.0
m
m
7.0
W
a
ce
W
a
6.0
a
—4--LS1 COMP RUN (HOURS)
5.0
z
2
fLS1 COMP LOAD (HOURS)
a
g
fLS2 COMP RUN (HOURS)
4.0
zz
LS2 COMP LOAD (HOURS)
ELECTRICITY (kW-Hr)
W
3.0
O
a
2.0
1.0

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Mechanical
Treatment
System
Influent'
13.8
43.2
43.2
53.1
153.3
Effluent'
14.3
0.17
0.17
2.0
16.66
% Contaminant Removal
<
99.60%
99.60%
96.18%
89.13%
Step 2
Ph y o-remediation
System
Irrigation water
14,280
173.4
174.93
2029.8
166 8.13
Drainage water
4,685.20
ND
ND
175.69
4860.89
Lys 2
Lys 4
811.16
ND
ND
0.02
811.18
Lys 7
0.00
ND
ND
ND
0.00
Lys 8
--
--
--
--
--
Lys 9
--
--
--
--
--
Lys 10
0.02
ND
ND
0.00
0.021
Lys 11A
--
--
--
--
--
Lys 11B
0.04
ND
ND
0.00
0.041
Lys 12E
0.01
ND
ND
0.00
0.006
Lys 12
0.00
ND
ND
ND
0.00
Lys 13E
data not used in calculations
Lys 13W
0.00
ND
ND
0.00
0.00
Lys 14
ND
ND
ND
ND
Lys 15W
0.02
ND
ND
ND
0.02
Lys 16
0.00
ND
ND
0.00
0.00
Average (n =14)
392.60
ND
ND
12.55
405.16
% Contaminant Removal
97.3%
100%
100%
99.4%
97.6%
Overall Percent Contaminant Removal
97.1%
100%
100%
100.0%
99.7%
i 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.