4101_Guilford_HighPoint_RiverdaleDrive_MSWLF_CAReport_FID1377459_20191126

SEABOARD GROUP II AND THE CITY OF HIGH POINT
November 26, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Remedial Action Progress Report, 2019 Third Quarter
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
The Seaboard Group II and the City of High Point (Parties) are providing this 2019 Third
Quarter Remedial Action Progress Report for the former Seaboard Chemical Corporation facility
and the closed Riverdale Drive Landfill located in Jamestown, NC (Site).
During the third quarter of 2019 the mechanical and phytoremediation treatment systems
processed 3,490,936 gallons of extracted groundwater and leachate. Also during the third
quarter of 2019 the following shutdowns exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
July 3, 2019
2.5 days
Air Loss — overloaded compressor
July 8, 2019
1.0 days
Faulty soil temperature sensor
July 19, 2019
2.5 days
Power loss
August 4, 2019
1.0 days
Bag filter malfunction due to lime line clog
August 11, 2019
1.5 days
LS-2 I/O communications issues
September 28, 2019
1.5 days
420 pump fault and code deficient
The PLC/HMI control system update is underway and scheduled to be completed during the
fourth quarter of 2019. Note that during installation of the PLC/HMI controls update, the
treatment system has been shut down. We anticipate that it will take four to five weeks to fully
install and test the new PLC/HMI control system.
The attached tables provide the results of the full scale operation of the treatment system during
the third quarter of 2019, including: Operating Data, Process Flow Data, Static Water Level
Data, System Chemistry, Utility Data Use, 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
[e-mail].
Respectfully,
Seaboard Group II and City of High Point
'4�7 za--
Gary D. Babb, P.G.
President
cc: Dave Nutt, Esq. - Seaboard Trustee
Steve Anastos - Seaboard Trustee
Ed Gunderson - Seaboard Group Technical Committee
Craig Coslett — Project Oversight Coordinator
Terry Houk - City of High Point Trustee
Amos Dawson, Seaboard Group II Counsel
Jackie Drummond - NCDEQ Division of Solid Waste

SEABOARD GROUP II & THE CITY OF HIGH POINT
QUARTERLY LOG - Q3 2019
Quarterly
Units of
INITIAL
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK
WEEK 10
WEEK 11
WEEK 12
WEEK 13
Totals
Measure
METER READING
�
LEACHATE (GALLONS)
9,126,448
9,184,450
9,313,278
9,399,106
9,523,036
9,641,190
9,739,094
9,853,656
9,956,636
10,079,717
10,169,986
10,274,248
10,372,873
10,449,030
1,322,582
GALLONS
LSl-RWs (GALLONS)
2,150,198
2,180,780
2,235,754
2,271,965
2,335,181
2,391,031
2,446,306
2,513,637
2,561,844
2,625,054
2,666,065
2,699,406
2,744,310
2,774,312
624,114
GALLONS
PWDR1(GALLONS)
10,862,631
10,919,903
11,036,607
11,112,597
11,223,539
11,335,830
11,430,672
11,550,875
11,653,433
11,784,029
11,874,670
11,989,012
12,096,078
12,183,632
1,321,001
GALLONS
SIS-RWs(GALLONS)
1,316,068
1,327,230
1,344,842
1,356,636
1,377,406
1,395,591
1,412,422
1,431,735
1,449,548
1,472,250
1,488,137
1,504,597
1,519,329
1,530,230
214,162
GALLONS
PHYTO DISCH. (GALLONS)
14,095,826
14,251,642
14,569,481
14,777,395
15,096,686
15,399,459
15,666,164
15,989,590
16,267,348
16,606,893
16,844,525
17,115,113
17,381,675
17,586,762
3,490,936
GALLONS
AIR STRIP. RUNTIME (FIRS)
3,006
3,077
3,224
3,323
3,465
3,613
3,737
3,898
4,034
4,213
4,351
4,512
4,669
4,796
1790(82%)
HOURS
LSl COMP RUN (HOURS)
3,224
3,348
3,507
3,642
3,805
3,958
4,126
4,292
4,451
4,637
4,781
4,948
5,113
5,259
2,035
HOURS
LSl COMP LOAD (HOURS)
2,071
2,142
2,267
2,356
2,487
2,589
2,727
2,864
2,962
3,070
3,153
3,246
3,339
3,414
1,343
HOURS
LS2 COMP RUN (HOURS)
13,980
14,040
14,150
14,240
14,370
14,475
14,670
14,830
14,980
15,150
15,270
15,420
15,570
15,690
1,710
HOURS
LS2 COMP LOAD (HOURS)
1,434
1,440
1,449
1,456
1,466
1,475
1,496
1,518
1,536
1,550
1,563
1,578
1,591
1,602
168
HOURS
ELECT. UPPER (kW-Hr)
12,154
12,178
12,212
12,241
12,277
12,312
12,348
12,387
12,421
12,461
12,490
12,527
12,562
12,592
438
KW-HR
WATER METER (CF)
416,815
416,863
417,098
417,190
417,225
417,676
418,000
418,670
419,368
419,699
420,000
420,383
420,861
421,174
32,605
GALLONS
BACKWASH PUMP (GAL.)
223,568
223,568
224,486
224,486
225,400
226,315
228,144
231,808
235,467
237,297
239,124
240,953
243,695
245,524
21,956
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
1,102,066
1,111,572
1,132,277
1,145,429
1,165,011
1,183,694
1,200,120
1,219,981
1,236,205
1,258,309
1,273,591
1,291,146
1,298,625
1,298,625
196,559
GALLONS
ZONE 2
1,045,829
1,054,227
1,072,028
1,084,778
1,104,513
1,123,143
1,138,712
1,158,782
1,174,307
1,194,511
1,208,509
1,225,221
1,240,727
1,253,625
207,796
GALLONS
ZONE 3
1,098,811
1,108,064
1,126,944
1,139,867
1,159,917
1,178,263
1,194,209
1,214,311
1,230,931
1,251,554
1,266,545
1,283,144
1,300,019
1,313,751
214,940
GALLONS
ZONE
1,015,052
1,023,341
1,040,721
1,051,688
1,069,730
1,086,216
1,100,925
1,118,866
1,134,511
1,153,273
1,167,018
1,181,901
1,197,998
1,209,774
194,722
GALLONS
ZONE 5
1,115,295
1,124,576
1,143,992
1,156,972
1,176,965
1,196,101
1,211,844
1,231,522
1,248,478
1,268,901
1,283,879
1,300,298
1,317,949
1,330,715
215,420
GALLONS
ZONE 6
1,127,823
1,137,260
1,157,387
1,170,547
1,191,081
1,209,824
1,227,005
1,247,300
1,265,016
1,285,902
1,300,900
1,317,439
1,334,536
1,348,506
220,683
GALLONS
ZONE 7
1,113,140
1,122,701
1,142,076
1,155,450
1,176,107
1,195,056
1,211,730
1,232,384
1,250,560
1,272,170
1,287,374
1,304,487
1,322,075
1,336,436
223,296
GALLONS
ZONE 8
1,156,980
1,167,211
1,186,865
1,200,173
1,220,529
1,239,636
1,257,055
1,275,727
1,292,262
1,312,824
1,326,673
1,342,545
1,359,618
1,373,406
216,426
GALLONS
ZONE 9
1,122,705
1,133,056
1,152,595
1,165,395
1,186,414
1,205,193
1,221,768
1,242,474
1,260,139
1,282,143
1,297,464
1,314,399
1,332,413
1,346,912
224,207
GALLONS
ZONE 10
1,187,108
1,197,594
1,217,991
1,231,498
1,252,346
1,271,058
1,288,746
1,309,273
1,327,280
1,348,177
1,363,715
1,380,654
1,398,277
1,411,753
224,645
GALLONS
ZONE 11
512,660
518,360
530,962
538,774
550,008
561,525
572,107
583,338
592,901
605,303
614,290
624,060
634,612
642,735
130,075
GALLONS
ZONE 12
1,016,862
1,027,104
1,047,080
1,060,188
1,079,419
1,098,902
1,116,364
1,137,010
1,154,922
1,176,306
1,191,896
1,208,804
1,225,392
1,239,582
222,720
GALLONS
ZONE 13
833,251
842,600
860,836
873,436
892,488
911,410
928,137
946,554
963,277
984,075
998,429
1,013,476
1,029,703
1,042,880
209,629
GALLONS
ZONE 14
877,933
887,525
905,527
917,605
935,544
953,282
968,294
987,661
1,002,779
1,023,038
1,035,996
1,051,975
1,067,980
1,080,567
202,634
GALLONS
ZONE 15
597,231
606,922
625,686
638,110
656,842
675,189
690,072
710,172
726,545
747,586
761,928
779,095
795,945
808,897
211,666
GALLONS
Zone 16
298,551
308,355
327,484
340,096
358,711
377,155
392,965
413,278
429,820
450,951
465,079
481,816
498,385
511,794
213,243
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
43%
87%
59%
84%
88%
74%
96%
81%
93%
96%
96%
93%
76%
82%
Percent
AVERAGE FLOW (GPM)
15.5
31.5
20.6
31.7
30.0
26.5
32.1
27.6
29.5
27.5
26.8
26.4
20.3
26.6
GPM
EFF. DISCH. (GALLONS)
22,259
45,406
29,702
45,613
43,253
38,101
46,204
39,680
42,443
39,605
38,655
38,080
29,298
38,331
GPD
TOTAL INFLUENT (GALLONS)
22,431
45,445
29,975
45,551
43,497
37,836
45,916
38,794
42,449
39,635
38,344
37,904
29,231
38,231
GPD
INF. LEACHATE (GALLONS)
8,286
18,404
12,261
17,704
16,879
13,986
16,366
14,711
15,385
15,045
14,895
14,089
10,880
14,530
GPD
INF. LS1-RWs (GALLONS)
4,369
7,853
5,173
9,031
7,979
7,896
9,619
6,887
7,901
6,835
4,763
6,415
4,286
6,847
GPD
INF. PWDR) (GALLONS)
8,182
16,672
10,856
15,849
16,042
13,549
17,172
14,651
16,325
15,107
16,335
15,295
12,508
14,503
GPD
INF. SIS-RWs (GALLONS)
1,595
2,516
1,685
2,967
2,598
2,404
2,759
2,545
2,838
2,648
2,351
2,105
1,557
2,351
GPD
WEEKLY RUNTIME (DAYS)
3.0
6.1
4.1
5.9
6.2
5.2
6.7
5.7
7.4
5.7
6.7
6.5
5.3
5.7
DAYS/WK
LSl COMP RUN (HOURS)
17.7
22.7
19.3
23.3
21.9
24.0
23.7
22.7
23.3
24.0
23.9
23.6
20.9
22.4
HRS/DAY
LSl COMP LOAD (HOURS)
10.1
17.9
12.7
18.7
14.6
19.7
19.6
14.0
13.5
13.8
13.3
13.3
10.7
14.8
HRS/DAY
LS2 COMP RUN (HOURS)
8.6
15.7
12.9
18.6
15.0
27.9
22.9
21.4
21.3
20.0
21.4
21.4
17.1
18.8
HRS/DAY
LS2 COMP LOAD (HOURS)
0.9
1.3
1.0
1.4
1.3
3.0
3.1
2.6
1.8
2.2
2.1
1.9
1.6
1.9
HRS/DAY
ELECTRICITY(kW-Hr)
3.4
4.9
4.1
5.1
5.0
5.1
5.6
4.9
5.0
4.8
5.3
5.0
4.3
4.8
kW-HR/DAY
CITY WATER (GALLONS)
6.9
33.6
13.1
5.0
64
46
96
100
41
50
55
68
45
359
GPD
BACKWASH PUMP (GAL.)
131.1
130.6
131
261
523
523
229
305
261
392
261
242
GPD
EFFLUENT LABS
Fe (mg/L)
1.41
0.31
0.48
0.74
0.01
3.93
0.88
0.42
0.3
1.8
0.48
0.16
0.4
0.8
0.8
mg/L
pH
6.4
6.39
6.89
6.2
6.24
6.59
6.41
6.32
6.2
6.28
6.27
6.33
6.34
6.29
6.4
m/L
ORP
4
31
10
31
34
60
68
48
27
214
194
200
225
201
103
mV
COND
1,229
1,457
1223
1255
1321
1670
1329
1,271
1,146
1,227
1,234
1,233
1,400
1,441
1,324
uS/cm
TDS(mg/L)
848
1015
847.3
868
920.5
1180
925.2
884
801
855
859
861
985
1,007
924
mg/L
TSS (mg/L)
2.1
5
8
0
0
16
5
12
0
5
11
4.8
mg/L
COD (mg/L)
67
91
74
90
113
74
70
75
63
84
82
83
68
75
80
mg/L
WELL LEVELS
Average
Change
OWDR-4
682.16
677.43
675.92
676.64
675.95
678.61
676.75
676.00
676.34
677.05
675.91
676.16
675.64
676.56
676.5
(5.62)
OWDR-2
681.90
677.13
675.51
676.30
675.53
678.29
676.40
675.58
675.91
676.69
675.49
675.92
675.39
676.37
676.2
(5.71)
PWDR-1
689.23
658.17
656.25
656.80
656.84
658.67
657.87
658.91
659.28
661.33
660.66
660.89
657.28
658.81
658.6
(30.63)
OWDR-3
681.80
682.14
681.82
681.93
681.90
682.04
681.74
681.61
681.91
681.74
681.47
681.27
681.8
(0.02)
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.32
681.32
681.42
681.27
682.20
681.85
681.13
681.68
681.77
681.49
680.65
681.6
(1.57)
ESTIMATED LAKE LEVEL
682.6
682.6
682.6
682.6
682.6
682.0
682.01
682.0
682.0
682.01
682.2
682.2
682.20
682.20
682.2
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LEACHATE(LCHT)
11ES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
LS-1 RECOVERY WELLS
IYES
YES
YES
YES
YES
YESI
YES
YES
YESI
YES
YES
YES
YES
YES
SIS RECOVERY WELLS
IYES
YES
YES
YES
YES
YESI
YES
YES
YESI
YES
YES
YES
YES
YES

50000
45000
40000
35000
z
0
Q 30000
0
LL 25000
Q
o
W
o 20000
<
W
G
15000
10000
5000
0
SEABOARD Q3 2019
8
7
6
5
—■ INF. LEACHATE (GALLONS)
—4 INF. LS1-RWs (GALLONS)
4
INF. PWDR1 (GALLONS)
--K--INF. SIS-RWs (GALLONS)
3 �� EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
1
0
Ah
Ix
AL
—
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK

695.00
685.00
670.00
665.00
655.00
SEABOARD Q3 2019
0 1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
tOWDR-4
fOWDR-2
PWDR-1
-+(-OWDR-3
-I- PW-6D (696.79)
--*-OWLFS-2
- PW-16D
PW-15D
ESTIMATED LAKE LEVEL

H
Q'
O
ai
LL
18
16
14
12
10
8
6
4
2
0
SEABOARD Q3 2019
1,800
1,600
1,400
1,200
1,000
800
600
400
200
-
0
o
p
z
O
-Fe (mg/L)
pH
TSS (mg/L)
ORP
-I-COND
tTDS (mg/L)
COD (mg/L)
dr
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK

25.0
kn 20.0
W
Q
W
Q
J
0 15.0
cr
O
Ln
IA
W
a
all
SEABOARD Q3 2019
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
LS1 COMP RUN (HOURS)
LS1 COMP LOAD (HOURS)
LS2 COMP RUN (HOURS)
—X— LS2 COMP LOAD (HOURS)
—W— ELECTRICITY (kW-Hr)

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent'
10.3
36.4
16.9
19.9
83.5
Mechanical
Effluent'
10.5
0.082
0.070
0.06
10.6
Treatment
System
% Contaminant Removal
<
99.8%
99.6%
99.7%
87.3%
Irrigation water
10,500
82
70
60
10,600
Drainage water
358
ND
ND
ND
358
Lys 2 (vol. scaling factor, 346)
Lys 7 (vol. scaling factor, 458)
__
__
__
__
--
Lys 8 vol. scalingfiactor, 462
ND
ND
ND
23.8
23.8
Lys 9 vol. scalin actor, 295
--
--
--
--
--
Step 2
Lys 10 vol. scalin actor, 473
332
ND
ND
3.0
335
Phytoremediation
Lys 11A vol. scalin actor, 345
482
ND
ND
6.0
488
System
Lys 11B vol. scalin actor, 1315
682
ND
ND
205
682
Lys 12E vol. scalin actor, 174
445
ND
ND
14.4
459
Lys 12W vol. scalin actor, 427
41
ND
ND
ND
41
Lys 13E vol. scalin actor, 281
300
ND
ND
ND
300
Lys 13W vol. scalin actor, 290
299
ND
ND
6.0
305
Lys 14 vol. scalin actor, 247
90
ND
ND
ND
90
Lys 15 vol. scalin actor, 637
62
ND
ND
462
62
Averse (n=13)
238
ND
ND
4.1
242
Step 2
% Contaminant Removal
97.7
100%
100%
93.2%
97.7
Overall Percent Contaminant Removal
97.7%
100%
100%
99.97%
99.7%
' 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.