4101_Guilford_HighPoint_Riverdale_MSWLF_CAReport_FID1339102_20190809

SEABOARD GROUP II AND THE CITY OF HIGH POINT
August 9, 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 Second 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 Second 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 second quarter of 2019 the mechanical and phytoremediation treatment systems processed 2,948,603
gallons of extracted groundwater and leachate. Also during the second quarter of 2019 the following shutdowns
exceeding one day in duration occurred:
Date
Duration
Reason for Shutdown
April 12, 2018
2.5
Automatic, heavy rains, too much flow
April 17, 2019
1.0
Automatic, system component malfunction*
April 19, 2019
2.5
Automatic, power loss
May 3, 2019
2.0
Automatic, tripped breaker, lost compressor
May 18, 2019
2.0
Automatic, system component malfunction*
May 24, 2019
3.5
Automatic, system component malfunction*
June 2, 2019
1.2
Automatic, system component malfunction*
June 29, 2019
2.0
Automatic, power loss
* Shutdowns caused by system component malfunctions were a result of compounding factors and not a
specific upset to the system For example, some of the shutdowns appear to be loss of air supply at the LS-
1 compressor due to a combination of locked up pneumatic pumps, leaking supply valves, and stuck
regulators. Regulators have been repaired, pumps have been serviced (some are scheduled for
replacement), and valves have been ordered. Another system component malfunction caused shutdown
may be due to a bad temperature sensor in the east lobe that registered freezing conditions and because of
stuck zone valves was not able to direct flow to another zone. The replacement senor has been installed
and replacement solenoids have been ordered.
Several Operation and Maintenance (O&M) activities have been completed or are currently underway to improve
the operation of the treatment system and overall condition of the Site. These O&M activities include the following:

• Update the PLC/HMI control system to optimize the groundwater/leachate extraction and treatment system
operations. This update is currently underway and includes the installation of new hardware, wiring of new
equipment, and installation of new programmable control logic.
• The removal and recycling of the PhotoCat equipment and controllers from the treatment system enclosure
is also currently underway at this time.
• Maintenance activities at the former Seaboard Chemical property to address minor security and safety
concerns identified during a recent self -audit have been completed.
The attached tables provide the results of the full scale operation of the treatment system during the second quarter
of 2019, including: Operating Data, Process Flow Data, Static Water Level Data, System Chemistry, Utility Data
Use, and Contaminant Removal Efficiency.
Summary
Several O&M activities are in process or have been completed as described above. The PLC/HMI control system
update and recycling of the PhotoCat equipment are scheduled to be completed during the third quarter of 2019.
Note that during final installation the system will be shut down. We anticipate that it will take two to three weeks to
fully install and test the new PLC/HMI system update.
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
—"'I '4�7 xzlelo�e
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 -Q42018
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
v
H
ry
ry
iO
H
�ry
ry
r^
.�i
ry
LEACHATE (GALLONS)
7,860,234
8,002,834
8,111,531
8,183,640
8,321,757
8,424,938
8,521,842
8,608,318
8,675,704
8,751,996
8,805,954
8,963,998
9,064,664
9,126,448
1,266,214
GALLONS
LSl-RWs (GALLONS)
1,787,802
1,798,536
1,829,077
1,847,722
1,890,736
1,923,731
1,950,239
1,978,198
2,000,951
2,029,428
2,047,866
2,088,650
2,122,584
2,150,198
362,396
GALLONS
PWDR1(GALLONS)
9,726,594
9,842,466
9,910,256
9,968,732
10,094,732
10,211,697
10,285,993
10,363,761
10,424,441
10,517,480
10,586,303
10,699,335
10,797,211
10,862,631
1,136,037
GALLONS
SIS-RWs(GALLONS)
1,120,369
1,139,819
1,152,868
1,157,168
1,180,125
1,199,277
1,210,842
1,223,436
1,234,222
1,242,280
1,265,761
1,288,203
1,306,061
1,316,068
195,699
GALLONS
PHYTO DISCH. (GALLONS)
11,147,223
11,438,024
11,660,788
11,815,177
12,143,594
12,413,814
12,619,970
12,822,669
12,980,963
13,192,319
13,351,718
13,680,940
13,930,954
14,095,826
2,948,603
GALLONS
AIR STRIP. RUNTIME (FIRS)
1,532
1,695
1,793
1,868
2,030
2,180
2,276
2,371
2,450
2,566
2,654
2,798
2,922
3,006
1,474(67.5%)
HOURS
LSl COMP RUN (HOURS)
1,368
1,536
1,646
1,768
1,937
2,102
2,250
2,387
2,505
2,639
2,783
2,945
3,098
3,224
1,856
HOURS
LSl COMP LOAD (HOURS)
819
938
1,014
1,065
1,190
1,317
1,400
1,482
1,552
1,658
1,741
1,882
2,001
2,071
1,252
HOURS
LS2 COMP RUN (HOURS)
12,770
12,910
13,010
13,030
13,190
13,330
13,420
13,500
13,580
13,650
13,700
13,820
13,910
13,980
1,210
HOURS
LS2 COMP LOAD (HOURS)
1,330
1,342
1,350
1,352
1,365
1,376
1,383
1,390
1,397
1,404
1,408
1,419
1,428
1,434
104
HOURS
ELECT. UPPER (kW-Hr)
11,702
11,771
11,812
11,849
11,895
11,932
11,958
11,987
12,013
12,040
12,063
12,098
12,129
12,154
452
KW-HR
WATER METER (CF)
414,074
414,427
414,749
414,996
415,217
415,436
415,608
415,665
415,852
416,055
416,238
416,459
416,559
416,815
20,503
GALLONS
BACKWASH PUMP (GAL.)
214,837
216,662
218,489
218,489
219,404
219,404
219,914
219,914
219,914
220,827
221,740
222,656
222,656
223,568
8,731
GALLONS
IRRIGATION ZONES (GALLONS):
ZONE 1
915,423
936,684
950,257
959,516
978,850
996,246
1,009,472
1,021,174
1,031,493
1,045,029
1,054,699
1,075,486
1,091,267
1,102,066
186,643
GALLONS
ZONE 2
873,164
889,435
903,125
912,342
931,274
947,784
960,282
971,342
981,029
992,966
1,001,429
1,021,475
1,036,309
1,045,829
172,665
GALLONS
ZONE 3
909,040
926,607
940,927
949,830
969,636
986,110
998,857
1,013,734
1,023,759
1,043,553
1,053,119
1,072,815
1,088,239
1,098,811
189,771
GALLONS
ZONE
849,815
865,934
878,292
886,782
904,331
919,542
935,208
956,420
955,236
966,075
974,574
992,413
1,005,594
1,015,052
165,237
GALLONS
ZONE 5
934,977
953,175
967,527
977,146
996,345
1,013,344
1,025,095
1,037,317
1,047,473
1,059,178
1,068,821
1,089,356
1,104,852
1,115,295
180,318
GALLONS
ZONE 6
944,289
961,679
976,136
985,331
1,006,479
1,023,769
1,035,076
1,048,378
1,057,829
1,070,670
1,080,489
1,101,068
1,116,968
1,127,823
183,534
GALLONS
ZONE 7
927,139
945,728
960,026
969,030
989,757
1,007,126
1,019,532
1,033,028
1,042,667
1,055,471
1,065,668
1,086,706
1,102,763
1,113,140
186,001
GALLONS
ZONE 8
970,200
989,102
1,002,570
1,012,499
1,033,923
1,051,320
1,062,891
1,076,328
1,086,814
1,098,981
1,109,697
1,130,877
1,146,883
1,156,980
186,780
GALLONS
ZONE 9
936,651
954,616
967,818
977,327
998,586
1,016,595
1,029,516
1,042,665
1,053,002
1,064,972
1,075,727
1,096,746
1,112,667
1,122,705
186,054
GALLONS
ZONE 10
995,671
1,014,309
1,028,522
1,038,838
1,060,517
1,077,893
1,090,418
1,103,452
1,114,542
1,127,727
1,139,330
1,161,150
1,176,803
1,187,108
191,437
GALLONS
ZONE 11
410,399
419,815
427,621
433,146
445,388
454,752
462,867
471,461
476,874
482,354
487,901
499,114
507,075
512,660
102,261
GALLONS
ZONE 12
836,396
853,727
866,319
876,025
896,880
913,126
926,643
937,691
947,208
961,239
971,295
991,459
1,006,742
1,016,862
180,466
GALLONS
ZONE 13
662,877
680,100
692,304
701,520
720,814
736,663
749,123
759,595
767,955
780,428
789,416
809,310
823,322
833,251
170,374
GALLONS
ZONE 14
711,821
727,564
739,223
748,184
767,823
783,427
795,569
805,706
814,489
825,522
834,568
853,938
867,984
877,933
166,112
GALLONS
ZONE 15
423,740
440,471
453,483
463,149
483,574
499,834
512,619
522,548
531,513
543,962
552,992
572,633
587,646
597,231
173,491
IGALLONS
Zone 16
124,055
140,182
153,989
163,612
183,054
199,571
212,138
222,212
231,018
243,617
252,946
272,819
288,143
298,551
174,496
GALLONS
DAILYAVERAGE
Average
Units
AVERAGE RUNTIME
97%
59%
44%
97%
90%
57%
57%
36%
94%
52%
86%
74%
50%
69%
%
AVERAGE FLOW (GPM)
28.8
22.1
15.3
32.6
26.8
20.5
20.1
13.7
24.5
15.8
32.7
24.8
16.4
22.6
GPM
EFF. DISCH. (GALLONS)
41,543
31,823
22,056
46,917
38,603
29,451
28,957
19,787
35,226
22,771
47,032
35,716
23,553
32,572
GPD
TOTAL INFLUENT (GALLONS)
41,237
31,440
21,933
47,155
38,899
29,896
29,257
20,201
34,311
23,529
47,757
35,762
23,546
32,686
GPD
INF. LEACHATE (GALLONS)
20,371
15,528
10,301
19,731
14,740
13,843
12,354
8,423
12,715
7,708
22,578
14,381
8,826
13,962
GPD
INF. LS1-RWs (GALLONS)
1,533
4,363
2,664
6,145
4,714
3,787
3,994
2,844
4,746
2,634
5,826
4,848
3,945
4,003
GPD
INF. PWDR) (GALLONS)
16,553
9,684
8,354
18,000
16,709
10,614
11,110
7,585
15,507
9,832
16,147
13,982
9,346
12,571
GPD
INF. SIS-RWs (GALLONS)
2,779
1,864
614
3,280
2,736
1,652
1,799
1,348
1,343
3,354
3,206
2,551
1,430
2,150
GPD
WEEKLY RUNTIME (DAYS)
6.8
4.1
3.1
6.8
6.3
4.0
4.0
2.9
5.6
3.6
6.0
5.2
3.5
4.8
DAYS/WK
LSl COMP RUN (HOURS)
24.0
15.7
17.4
24.1
23.6
21.1
19.6
14.8
22.3
20.6
23.1
21.9
18.0
20.5
HRS/DAY
LSl COMP LOAD (HOURS)
17.0
10.9
7.3
17.9
18.1
11.9
11.7
8.8
17.7
11.9
20.1
17.0
10.0
13.9
HRS/DAY
LS2 COMP RUN (HOURS)
20.0
14.3
2.9
22.9
20.0
12.9
11.4
10.0
11.7
7.1
17.1
12.9
10.0
13.3
HRS/DAY
LS2 COMP LOAD (HOURS)
1.7
1.1
0.3
1.9
1.6
1.0
1.0
0.9
1.2
0.6
1.6
1.3
0.9
1.1
HRS/DAY
ELECTRICITY(kW-Hr)
9.9
5.9
5.3
6.6
5.3
3.7
4.1
3.3
4.5
3.3
5.0
4.4
3.6
5.0
kW-HR/DAY
CITY WATER (GALLONS)
50.0
46.0
35.0
32.0
31
25
8
23
34
26
32
14
37
226
GPD
BACKWASH PUMP (GAL.)
261.0
261.0
131.0
73
152
130
131
130
98
GPD
EFFLUENT LABS
Fe (mg/L)
0.31
0.39
0.49
0.67
0.54
0.8
1.31
1.09
2.0
0.8
1.43
0.54
0.28
1.41
0.9
mg/L
pH
6.2
6.47
6.64
6.65
6.29
6.77
6.69
6.89
6.8
6.45
6.46
6.69
6.33
6.40
6.6
m/L
ORP
57
65
41
20
64
83
21
32
0
45
5
11
28
4
32
mV
COND
1,032
1,162
1303
1347
1223
1779
1341
1,728
1,608
1,383
1,210
1,097
1,100
1,229
1,347
uS/cm
TDS(mg/L)
727
813
918.2
953.5
873.5
1270
940
1,227
1,132
968
842
760
761
848
947
mg/L
TSS (mg/L)
1
4
4
0
3
7
2
12
9
10
6
1
2
4.7
mg/L
COD (mg/L)
58
102
82
97
77
85
94
87
87
78
83
68
57
67
82
mg/L
WELL LEVELS
Average
Change
OWDR-4
682.16
676.97
678.17
678.33
667.36
676.15
677.60
677.76
677.56
677.67
679.69
677.73
676.14
677.74
676.8
(5.61)
OWDR-2
681.90
676.60
677.85
678.02
675.97
675.73
677.28
677.44
677.24
677.34
679.44
677.41
675.77
677.43
677.2
(5.74)
PWDR-1
689.23
657.64
658.64
658.99
656.61
656.05
657.85
658.20
658.00
657.78
659.64
657.93
656.45
658.01
657.8
(32.95)
OWDR-3
681.80
683.10
682.75
682.37
682.32
682.49
682.18
681.86
683.04
682.54
682.19
682.15
682.5
1.00
PW-6D (696.79)
680.37
OWLFS-2
680.00
PW-16D
680.52
PW-15D
683.12
682.23
683.70
683.53
681.94
681.76
682.80
682.79
682.43
682.42
684.42
682.37
681.81
682.62
682.7
(0.73)
ESTIMATED LAKE LEVEL
682.6
682.6
682.6
682.61
682.6
682.6
682.6
682.6
682.6
681.8
683.0
682.6
682.50
682.50
682.6
SOURCE WATER
PWDR-1
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YESI
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

50000
45000
40000
35000
z
0
Q 30000
�
0
LL 25000
>-
Q
o
W
o 20000
<
W
GA,
15000
10000
5000
0
SEABOARD Q2 2019
8
7
6
5
—■ INF. LEACHATE (GALLONS)
-4 INF. LS1-RWs (GALLONS)
4
—� INF. PWDR1 (GALLONS)
--0--INF. SIS-RWs (GALLONS)
3 —OK--EFF. DISCH. (GALLONS)
WEEKLY RUNTIME (DAYS)
2
0
AL
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WEEK

685.00
675.00
665.00
655.00
SEABOARD Q2 2019
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK
OWDR-4
OWDR-2
PWDR-1
-+(-OWDR-3
--I- PW-6D
--*--OWLFS-2
PW-16D
PW-15D
ESTIMATED LAKE LEVEL

N
N
ct
O
ti
14
12
10
4
2
0
SEABOARD Q2 2019
2,000
1,800
1,600
1,400
1,200
1,000
800
600
400
200
-
o
p
z
v
Fe (mg/L)
pH
TSS (mg/L)
ORP
—*— CO N D
—40---TDS (mg/L)
COD (mg/L)
I
1 2 3 4 S 6 7 8 9 10 11 12 13
WEEK

25.0
Ln 20.0
W
Q
W
Q
J
0 15.0
cr
O
Ln
IA
W
a
all
1 2 3 4 5 6 7 8 9 10 11 12 13
WEEK

Water Treatment System
Dioxane
Chlorinated
ethenes
Chlorinated
ethanes
Other
organics
Total
Mass
kg
kg
kg
kg
k
Step 1
Influent *
7.7
30.4
15.4
24.9
78.4
Mechanical
Effluent' * *
10.0
0.18
0.11
0.09
10.2
Treatment
System
% Contaminant Removal
<
99.4%
99.3%
99.6%
87.0%
Irrigation water
10,000
180
110
90
10,200
Drainage water*
2,613
ND
ND
ND
2,613
Lys 2 (vol. scaling factor, 259)
Lys 7 (vol. scaling factor, 334)
ND
ND
ND
ND
ND
Step 2
Lys 8 (vol. scaling factor, 384)
ND
ND
ND
ND
ND
Phytoremediation
Lys 10 (vol. scaling factor, 315)
889
ND
ND
ND
882
System
Lys 11B (vol. scaling factor, 680)
561
ND
ND
ND
560
Lys 12E (vol. scaling factor,189)
534
ND
ND
10.7
540
Lys 13E (vol. scaling factor, 227)
492
ND
ND
ND
493
Lys 15 (vol. scaling factor, 607)
26
ND
ND
17.5
44
Averse (n=8)
639
ND
ND
3.5
642
Step 2
% Contaminant Removal
93.6%
100%
100%
96.1 %
93.7%
Overall Percent Contaminant Removal
91.7%
100%
100%
99.98%
99.2%
*Influent: gal (including: LCHTs, 1,266,214 gal; LS1-RWs, 362,396 gal; PWDR-1, 1,136,037 gal; SIS-RWs, 195,699 gal; City
water (backwash and floc), 20,503. **Effluent: 2,948,603 gal.
1 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.