cleanwater services
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^CleanWater Services
February 14, 2019
Oregon Department of Environmental Quality
Attn: Air Quality Permit CoordinatorNorthwest Region700 NE Multnomah Street, Suite 600Portland, OR 97232
Air Quality Permit Coordinator
RE: CLEAN WATER SERVICES ANNUAL AIR REPORTFOR THE DURHAM FACILITY AIR CONTAMINANT- SOURCE NO. 34-2623 *)T~
Enclosed please find the Annual Air Contaminant Discharge Report. If you need additional information
or have questions, please feel free to contact me at 503.547.8010.
Sincerely,
.^.H /^^^'
Tom Stow
Operations Division Manager
Enc.
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KcCEIVED
FEB 15 2019
NORTHWE. ^GION
2550 SW Hillsboro Highway • Hillsboro, Oregon 97123Phone: (503)681-3600 • Fax: (503)681-3603 • cleanwaterservices.org
2018 AIR CONTAMINANTDISCHARGE REPORTDURHAM FACILITY AIR CONTAMINANT SOURCE NO. 34-2623
Clean Water Services
Durham Advanced Wastewater Treatment Plant16060 SW 85th Ave
Tigard, Oregon 97224
cleanwaterservices.org Services
Equipment Run HoursFollowing are the monthly and annual equipment run hours for 2018, per reporting requirement 5.2.a.i.
The actual run hours on the WGB-1001 flare (at Digester Complex 1) are unknown, although it is almost
always online. Likewise, the WGB-30201 flare (at Digester Complex 2) was in use all year.
Month
Jan 2018Feb 2018Mar 2018Apr 2018May 2018Jun 2018Jul2018Aug 2018Sep 2018Oct 2018Nov 2018Dec 2018
Minimum
Maximum
Total
Average
DC2 Boiler 1
(hours)
0233
35321
4180
1016
0233340
28
DC2 Boiler 2(hours)
0249124
730200
2119
0249416
35
Admin
Building Boiler
(hours)266289278166
00000000
0289999
83
Total Boiler
(hours)
266771437176
51
4380
312
15
0771
1,755
146
Cagen 1
(hours)
742423610672727735607627628651717735
423742
7,874
656
Cagen 2
(hours)
742596706687739728498687687672693731
498742
8,166
681
Digester Gas Production and UsagePer reporting requirement 5.2.a.ii., following are the digester gas production and usage totals for 2018.
CWS acknowledges the apparent discrepancy between the Total Digester Gas Produced and Digester
Gas Use Plant Total. CWS has identified the cause of the discrepancy in the production data and
believes the use data are correct. CWS will increase the frequency of calibrations to avoid future errors.
CWS is also initiating a capital project to provide safe access to the waste gas burner flow meters.
Gas Flow and Production
Month
Jan 2018Feb 2018Mar 2018Apr 2018May 2018Jun 2018Jul2018Aug 2018Sep 2018Oct 2018Nov 2018Dec 2018
Total
Digester Complex 1Total Gas
Production (SCF)501,673
444,912
517,537
505,798
483,529
565,621
475,751
494,261
516,773
513,416
486,221
442,303
5,947,795
Digester Complex 2
Total Gas
Production (SCF)22,210,904
18,226,309
18,092,852
18,179,997
18,957,105
19,105,668
15,666,196
15,446,980
14,992,419
16,529,754
23,202,537
22,039,244
222,649,965
Total Digester
Gas Production
(SCF)22,712,577
18,671,221
18,610,389
18,685,795
19,440,634
19,671,289
16,141,947
15,941,241
15,509,192
17,043,170
23,688,758
22,481,547
228,597,760
Waste Gas
Burner 1 Flow
Total (SCF)2,407,401
2,795,319
2,453,192
2,046,615
3,925,376
4,775,188
3,895,226
3,415,536
1,897,670
2,164,367
2,902,187
1,691,217
34,369,294
Waste Gas
Burner 2 Flow
Total(SCF)756,351633,551
438,041
592,647
1,331,047
2,565,617
2,410,161
1,216,023
1,067,680
946,4421,903,331
879,808
14,740,699
Gas Usage
Boiler Gas | Flares Total | Engine 1 | Engine 2 | Total Digester ] Digester Gas
Flow Digester | DigesterGas | DigesterGas | DigesterGas | Gas Used By | Use Plant Total
Complex 2 | Use (SCF) | Total Daily Use | Total Daily Use | Cogen (SCF) | (SCF)(SCF) | | (SCF) | (SCF)
Jan 2018
Feb 2018Mar 2018Apr 2018May 2018Jun 2018Jul2018Aug 2018Sep 2018Oct 2018Nov 2018Dec 2018Total
1,490
2,406,033
981,762
8126,671
10,944
247,243
53,667
197122,154
5,497
52,365
3,908,104
3,163,752
3,428,870
2,891,233
2,639,262
5,256,423
7,340,805
6,305,387
4,631,559
2,965,350
3,110,809
4,805,518
2,571,025
49,109,993
10,020,832
5,683,507
7,566,981
8,941,933
9,451,510
8,682,555
8,131,407
7,380,511
8,463,333
8,387,117
9,422,476
9,775,871
101,908,033
9,928,527
8,015,461
8,727,239
8,985,585
9,437,730
8,990,881
6,126,418
8,586,034
8,615,231
8,128,867
9,218,720
9,673,135
104,433,828
19,949,359
13,698,968
16,294,220
17,927,518
18,889,240
17,673,436
14,257,825
15,966,545
17,078,564
16,515,984
18,641,196
19,449,006
206,341,861
23,114,601
19,533,871
20,167,215
20,566,861
24,172,334
25,025,185
20,810,455
20,651,771
20,044,111
19,748,947
23,452,211
22,072,396
259,359,958
Monthly Rolling Totals Criteria PollutantsMonthly rolling totals (12 consecutive months), of criteria pollutants from engine generators, flares,
boilers and total plant site can be found below per reporting requirement 5.2-a.iii.
February 2017 -January 2018
Equipment
Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural Gas
Use(106
therms)
0.0937
0.0312
Digester
Gas Use
(106ft3)
0.4858
98.9126
96.6135
17.3835
Total
Particulate
Emissions
(tons/year)0.0328
0.2031
0.0189
0.8457
0.8260
0.0678
1.9944
so;
Emissions
(tons/year)0.0141
0.4374
0.0408
2.1167
2.0675
1.4602
6.1367
NOx
Emissions
(tons/year)0.4499
0.2656
0.0248
15.2646
14.2127
0.3546
30.5721
CO Emissions
(tons/year)
0.3796
0.2187
0.0204
30.2561
28.9820
1.9296
61.7863
vocEmissions
(tons/year)0.0234
0.0141
0.0013
3.3221
3.2578
0.7301
7.3489
March 2017 - February 2018
Equipment | Natural Gas ] Digester | Particulate | S02 | NOx
Use (106 | Gas Use | Emissions | Emissions ] Emissions
therms) | (106ft3) | (tons/year) | (tons/year) | (tons/year)
CO Emissions | VOC
(tons/year) | Emissions
(tons/year)Unit Heaters
Boilers
EngineGenerator 1
Engine
Generator 2
Flare
0.0846
0.0282
2.8916
99.4468
96.3265
19.5230
Total
0.0296
0.1833
0.1128
0.8503
0.8236
0.0761
2.0757
0.0127
0.3949
0.2429
2.1282
2.0614
1.6399
6.4799
0.4061
0.2397
0.1475
15.3636
14.4658
0.3983
31.0210
0.3427
0.1974
0.1214
30.6188
29.3409
2.1671
62.7883
0.0212
0.0127
0.0078
3.2753
3.1535
0.8200
7.2904
April 2017 - March 2018
Equipment
Unit Hesters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural Gas
Use(106therms)
0.0815
0.0272
Digester
Gas Use(106ft3)
3.8604
98.2348
98.7516
21.9634
Total
Particulate
Emissions
(tons/year)0.0285
0.1765
0.1506
0.8399
0.8443
0.0857
2.1255
SOz
Emissions
(tons/year)0.0122
0.3802
0.3243
2.1022
2.1133
1.8449
6.7771
NOxEmissions
(tons/year)0.3911
0.2308
0.1969
15.2003
15.1178
0.4481
31.5849
CO Emissions
(tons/year)
0.3300
0.1901
0.1621
30.5325
30.5133
2.4379
64.1659
vocEmissions
(tons/year)0.0204
0.0122
0.0104
3.1422
3.1406
0.9225
7.2482
May 2017-April 2018
Equipment
Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural Gas
Use(106therms)
0.0846
0.0282
Digester
Gas Use(106ft3)
3.8374
98.5864
99.4585
22.8780
Total
Particulate
Emissions
(tons/year)0.0296
0.1834
0.1497
0.8429
0.8504
0.0892
2.1452
S02
Emissions
(tons/year)0.0127
0.3950
0.3223
2.1097
2.1284
1.9218
6.8899
NOx
Emissions
(tons/year)0.4063
0.2398
0.1957
15.2811
15.5429
0.4667
32.1326
CO Emissions
(tons/year)
0.3428
0.1975
0.1612
30.9585
31.2093
2.5395
65.4087
vocEmissions
(tons/year)0.0212
0.0127
0.0104
3.0505
3.0615
0.9609
7.1171
June 2017 - May 2018
Equipment | Natural Gas | DigesterUse(106 | Gas Use
therms) | (106ft3)
Particulate I SO; I NOx I CO Emissions | VOC
Emissions | Emissions | Emissions | (tons/year) | Emissions
(tons/year) | (tons/year) | (tons/year) | | (tons/year)UnitHeaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
0.0842
0.0281
Total
July 2017-June 2018
3.7856
99.1882
100.0968
26.8588
0.0295
0.1824
0.1476
0.8481
0.8558
0.1047
2.1682
0.0126
0.3929
0.3180
2.1226
2.1421
2.2561
7.2443
0.4041
0.2385
0.1931
15.4018
15.9752
0.5479
32.7606
0.3410
0.1964
0.1590
31.4768
31.9106
2.9813
67.0652
0.0210
0.0126
0.0102
2.9621
2.9745
1.1281
7.1086
Equipment
Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural GasUse (106
therms)
0.0841
0.0278
Digester
Gas Use(106ft3)
3.7952
99.2240
100.7070
33.4402
Total
Particulate
Emissions
(tons/year)0.0294
0.1807
0.1480
0.8484
0.8610
0.1304
2.1980
so;
Emissions
(tons/year)0.0126
0.3892
0.3188
2.1234
2.1551
2.8090
7.8081
NOxEmissions
(tons/year)0.4036
0.2363
0.1936
15.4334
16.3873
0.6822
33.3362
CO Emissions
(tons/year)
0.3405
0.1946
0.1594
31.8000
32.5793
3.7119
68.7857
vocEmissions
(tons/year)
0.0210
0.0125
0.0102
2.8618
2.8918
1.4045
7.2019
August 2017-July 2018
Equipment
Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural GasUse (106
therms)
0.0851
0.0280
Digester
Gas Use(106ft3)
4.0390
99.8439
99.0600
38.9588
Total
Particulate
Emissions
(tons/year)0.0298
0.1818
0.1575
0.8537
0.8470
0.1519
2.2217
so;
Emissions
(tons/year)0.0128
0.3917
0.3393
2.1367
2.1199
3.2725
8.2728
NOx
Emissions
(tons/year)
0.4084
0.2378
0.2060
15.5529
16.3844
0.7948
33.5842
CO Emissions
(tons/year)
0.3446
0.1958
0.1696
32.2762
32.4461
4.3244
69.7568
vocEmissions
(tons/year)0.0213
0.0126
0.0109
2.7895
2.7595
1.6363
7.2300
September 2017 - August 2018
Equipment
Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
Natural GasUse(106
therms)
0.0852
0.0280
Digester
Gas Use(106ft3)
4.0907
99.0431
100.7545
42.7281
Total
Particulate
Emissions
(tons/year)
0.0298
0.1817
0.1595
0.8468
0.8615
0.1666
2.2459
S02
Emissions
(tons/year)0.0128
0.3913
0.3436
2.1195
2.1561
3.5892
8.6125
NOx
Emissions
(tons/year)0.4089
0.2376
0.2086
15.4521
16.9308
0.8717
34.1097
CO Emissions
(tons/year)
0.3450
0.1957
0.1718
32.3049
33.4021
4.7428
71.1623
vocEmissions
(tons/year)0.0213
0.0126
0.0110
2.6736
2.7214
1.7946
7.2346
October 2017 - September 2018
Equipment | Natural Gas | Digester
Use(106 | Gas Use
therms) | (106ft3)
Particulate | SOz I NOx I CO Emissions | VOC
Emissions | Emissions ] Emissions | (tons/year) | Emissions
(tons/year) | (tons/year) | (tons/year) | | (tons/year)Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
0.0855
0.0279
4.0885
100.4595
101.5229
44.9546
Total
0.0299
0.1816
0.1595
0.8589
0.8680
0.1753
2.2732
0.0128
0.3911
0.3434
2.1498
2.1726
3.7762
8.8459
0.4103
0.2374
0.2085
15.6949
17.3509
0.9171
34.8191
0.3462
0.1955
0.1717
33.0288
34.0953
4.9900
72.8275
0.0214
0.0126
0.0110
2.6267
2.6489
1.8881
7.2087
November 2017 - October 2018
Equipment | Natural Gas | DigesterUse (106 | Gas Use
therms) | (106ft3)
Particulate | 502 I NOx I CO Emissions | VOC
Emissions | Emissions | Emissions | (tons/year) [ Emissions
(tons/year) (tons/year) (tons/year) (tons/year)Unit Heaters
Boilers
EngineGenerator 1
Engine
Generator 2
Flare
0.0828
0.0269
4.1671
99.8543
101.0470
46.5527
Total
0.0290
0.1750
0.1625
0.8538
0.8640
0.1816
2.2657
0.0124
0.3768
0.3500
2.1369
2.1624
3.9104
8.9490
0.3977
0.2288
0.2125
15.6272
17.5822
0.9497
34.9980
0.3355
0.1884
0.1750
33.1516
34.4065
5.1673
73.4244
0.0207
0.0121
0.0113
2.5063
2.5363
1.9552
7.0419
December 2017 - November 2018
Equipment | Natural Gas | Digester
Use (106 | Gas Use
therms) | (106ft3)
Particulate | S02 I NOx I CO Emissions I VOC
Emissions | Emissions [ Emissions | (tons/year) | Emissions
(tons/year) (tons/year) (tons/year) (tons/year)Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
0.0776
0.0250
4.0886
100.7537
103.1341
50.4158
Total
0.0272
0.1628
0.1595
0.8614
0.8818
0.1966
2.2892
0.0116
0.3506
0.3434
2.1561
2.2071
4.2349
9.3038
0.3724
0.2129
0.2085
15.5983
17.8024
1.0285
35.2231
0.3142
0.1753
0.1717
32.9885
34.5917
5.5962
73.8376
0.0194
0.0113
0.0110
2.4243
2.4817
2.1175
7.0652
January 2018 - December 2018
Equipment | Natural Gas | Digester
Use (106 | Gas Use
therms) | (106ft3)
Particulate | 502 I NOx I CO Emissions | VOCEmissions | Emissions | Emissions ] (tons/year) | Emissions
(tons/year) | (tons/year) | (tons/year) | | (tons/year)Unit Heaters
Boilers
Engine
Generator 1
Engine
Generator 2
Flare
0.0712
0.0224
3.9081
101.9080
104.4338
49.1100
Total
0.0249
0.1458
0.1524
0.8713
0.8929
0.1915
2.2789
0.0107
0.3140
0.3283
2.1808
2.2349
4.1252
9.1939
0.3418
0.1907
0.1993
15.6030
17.8787
1.0018
35.2153
0.2884
0.1570
0.1641
32.8927
34.4829
5.4512
73.4364
0.0178
0.0101
0.0106
2.3448
2.4021
2.0626
6.8480
Excess EmissionsPer reporting requirement item 5.2 b., there were zero (0) excess emissions for 2018.
Engine
Generator
Excess
Emissions
(count)
Flare #1 Excess I Flare tt2 Excess
Emissions I Emissions
Jan 2018Feb 2018Mar 2018Apr 2018May 2018Jun 2018Jul2018Aug 2018Sep 2018Oct 2018Nov 2018Dec 2018Total
0000000000000
0000000000000
0000000000000
Air Q.uality ComplaintsPer reporting requirement item 5.2 c., there were zero (0) air quality odor complaints for 2018.
Permanent ChangesPer reporting requirement item 5.2 d., permanent changes made for 2018 to the plant process,
production levels and pollution control equipment which affected air contaminant emissions are listed
below.
June 2018
Change
One gas boiler and one unit heater using natural gas were decommissioned during a renovation project ofthe O&M building.
Major MaintenanceFollowing are the work orders completed in 2018 per reporting requirement item 5.2 e.
2K interval service. Assist technicians from WES and
Ward/Lenard in changing out bearings in generator
2K interval service.
Additional InformationIf you have any questions or need additional information, please contact me at 503.547.8010 or
Certification StatementI CERTIFY UNDER PENALTY OF LAW THAT THIS DOCUMENT AND ALL ATTACHMENTS WERE PREPAREDUNDER MY DIRECTION OR SUPERVISION IN ACCORDANCE WITH A SYSTEM DESIGNED TO ASSURE THATQUALIFIED PERSONNEL PROPERLY GATHER AND EVALUATE THE INFORMATION SUBMITTED. BASED ONMY INQUIRY OF THE PERSON OR PERSONS WHO MANAGE THE SYSTEM, INFORMATION SUBMITTED IS,TO THE BEST OF MY KNOWLEDGE AND BELIEF, TRUE, ACCURATE AND COMPLETE. I AM AWARE THATTHERE ARE SIGNIFICANT PENALTIES FOR SUBMITTING FALSE INFORMATION INCLUDING THE POSSIBILITYOF FINE AND IMPRISONMENT FOR KNOWING VIOLATIONS.
NAME/TITLE
SIGNATURE
THOMAS E. STOWOPERATIONS DIVISION MANAGERT IV 7340
i6~S^'i^c^/, ^!^^-