city of london
CITY OF LONDON PLANNING, ENVIRONMENTAL & ENGINEERING SERVICES DEPARTMENT WASTEWATER TREATMENT OPERATIONS
OXFORD POLLUTION CONTROL PLANT 2011 ANNUAL REPORT FEBRUARY 2012
Oxford Pollution Control Plant 2011 Annual Report
February 2012
This annual report is in response to requirements under Certificate of Approval to Operate 34347J6HHY for the Oxford Pollution Control Plant. (a) A summary and interpretation of all monitoring data and a comparison to the effluent limits outlined in Condition 7, including an overview of the success and adequacy of the works; There were no monthly average compliance excursions for BOD, suspended solids, ammonia phosphorous and dissolved oxygen for the Oxford Pollution Control Plant in 2011 (see Table 1). Effluent pH ranged from 6.6 to 8.0 in 2011 which was within the compliance range of 6.0 to 9.5. The lowest raw pH was 7.2. The annual average daily flow for the Oxford Pollution Control Plant was 10.234 ML/day which was less than the Certificate of Approval limit of 17.25 ML/day. Section #1 has been out of service since May 15, 2008. Section #2 is rated at 13.62 ML/day and average flow in 2011 was at 75% of section #2 capacity. The works at the Oxford Pollution Control plant are sufficient to meet requirements. (b) A description of any operating problems encountered and corrective action taken; The Oxford plant section #1 was shut down in 2008 and the section 2 has operated well in 2011. (c) A summary of all maintenance carried out on any major structure, equipment, apparatus, mechanism or thing forming part of the Works; The Work Order list for the Oxford Pollution Control Plant is attached near the end of the report. (d) A summary of any effluent quality assurance or control measures undertaken in the reporting period; A Plant and effluent monitoring program was conducted and the data is in the tables of this report. All required samples were obtained in 2011. (e) A summary of the calibration and maintenance carried out on all effluent monitoring equipment; Flow meter calibrations are attached in the report. (f) A description of efforts made and results achieved in meeting the Effluent Objectives of Condition 6; The monthly average objectives for BOD, suspended solids, total phosphorous, ammonia, Dissolved Oxygen and E. Coli were achieved 100% of the time in 2011.
The pH objective range for the effluent is 6.5 to 9.0 and the objective was achieved 100% of the time in 2011. (g) A tabulation of the volume of sludge generated in the reporting period, an outline of anticipated volumes to be generated in the next reporting period and a summary of the locations to where the sludge was disposed. Sludge from Oxford Pollution Control Plant was hauled to the Greenway Pollution Control Centre for incineration. The total volume of sludge hauled from Oxford Pollution Control Plant in 2011 was 29,521 cubic metres. The 2011 average solids were 3.9%. Primary sludge and thickened waste are combined in the hauled waste tank. The City of London will continue to haul sludge to Greenway for dewatering and incineration. The 2012 sludge volume for the Oxford Pollution Control Plant is expected to be similar to the 2011 level. (h) A summary of any complaints received during the reporting period and any steps taken to address the complaints; There were no odour complaints in 2011. (i) A summary of all By-pass, spill or abnormal discharge events. There was one secondary by-pass event in 2011 and no raw sewage bypasses. The bypasses are listed in the report. The bypass event occurred on January 1, 2011. The secondary bypass volume for 2011 was 1.488 ML which is 0.04% of the total treated flow at the Oxford Pollution Control Plant in 2011.
TABLE 1 OXFORD PCP MONTHLY AVERAGE DATA FOR 2011 MONTH
JANUARY FEBRUARY MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
EFFLUENT BOD TEMPERATURE TOTAL FLOW RAW
UV CHANNEL
(C)
(ML/D)
(mg/L)
(mg/L)
12.4 11.2 10.1 11.6 13.5 16.3 19.1 20.4 20.3 18.7 17.0 14.7
9.500 10.157 13.308 11.687 11.704 9.597 8.211 8.287 8.902 9.825 9.777 11.867
175 211 105 139 103 175 146 189 191 128 178 160
1 2 2 2 1 1 1 1 1 2 2 2
15.4
10.235
158
2
15 15 15 15 10 10 10 10 10 10 10 15
14 21 23 19 15 13 11 11 12 17 17 20
259 259 259 259 173 173 173 173 173 173 173 259
216 249 170 187 168 252 230 270 288 264 270 223
2 3 2 2 2 2 2 2 1 2 1 2
232
2
5
OBJECTIVE AVERAGE
SUSPENDED SOLIDS pH TOTAL PHOSPHOROUS AMMONIA DISSOLVED OXYGEN MONTHLY GEOMETRIC UV UV UV UV MEAN LIMIT UV CHANNEL RAW UV LIMIT UV CHANNEL UV RAW UV LIMIT CHANNEL CHANNEL UV LIMIT LOWER E. COLI CHANNEL LOADING CHANNEL CHANNEL LOADING CHANNEL CHANNEL LOADING LOADING CHANNEL EFFLUENT LIMIT (ORGS./100MLS) LIMIT LIMIT LIMIT UV OBJECTIVE (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (mg/L) CHANNEL
NOTE: GRAY SHADING EXCEEDS OBJECTIVE BLACK SHADING EXCEEDS COMPLIANCE CRITERIA
10 10 10 10 10 10 10 10 10 10 10 10
19 30 21 23 21 18 14 18 13 15 10 22
173 173 173 173 173 173 173 173 173 173 173 173
7.1 7.1 7.6 7.5 7.5 7.4 7.2 7.3 7.3 7.6 7.5 7.8
5.68 6.45 3.38 3.89 4.68 6.28 5.85 6.36 6.31 6.72 6.12 4.98
0.29 0.27 0.22 0.25 0.40 0.37 0.42 0.38 0.42 0.34 0.34 0.25
7.4
5.56
0.33
5
0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65
2.7 2.7 3.0 2.9 4.7 3.6 3.4 3.2 3.7 3.3 3.3 2.9
17.3 17.3 17.3 17.3 17.3 17.3 17.3 11.2 11.2 11.2 11.2 11.2
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
0.5
5 5 5 5 3 3 3 3 3 3 3 5
9.4 9.2 9.5 8.7 8.2 8.1 7.4 7.8 7.9 8.1 8.3 8.4
2 or 4 3.3
0.1
5 5 5 5 4 4 4 4 4 4 4 5 5 OR 6
8.4
1 3 1 1 1 1
200 200 200 200 200 200
BY-PASSES OF SECONDARY TREATMENT IN 2011 OXFORD 2011 PLANT SUMMARY
O1
CITY OF LONDON
D A T E
01-Jan-11
PLANT
OXFORD ALL SECTIONS
ENVIRONMENTAL SERVICES DEPARTMENT POLLUTION CONTROL OPERATIONS DIVISION WEATHER SEWAGE ANALYSES UV CHANNEL TEMPERATU FLOW THROUGH R W D (C) PLANT PLANT BY-PASS BOD 5 DAY SUSPENDED PH TOTAL N E. D.O. A I I MILLION P (mg/L) SOLIDS PHOSPHOROUS H PLANT I N R R F GALLONS S PH A H (mg/L) (mg/L) 3 C N D E A I PER DAY FLOW HRS. U S M O O E F C W N (MGD) ML B S O M S U C U C U C U C L F A T A RATE O P L O P V H V H V H V H (mg/L) I F L I L D E I N H RAW RAW A RAW RAW A RAW RAW A RAW RAW A L L O MAX. MIN. TOTAL N D I O #1 #2 N #1 #2 N #1 #2 N #1 #2 N MPN U N D S A R N N N N E E U E E E E N D S L L L L T mm (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 16.7 s
10.1
12 40.35
18.495
1.488
8.03
50
81
7.33
7.1
1.4
9.6
OXFORD 2011 PLANT SUMMARY CITY OF LONDON ENVIRONMENTAL SERVICES DEPT. WEATHER TEMP. FLOW THRU R W D C PLANT A I I I N R R F 103m3 A I PER DAY N D E F C W N A T A RATE L I L L O MAX. MIN. N
PLANT BY-PASS
VOLUME (103m3)
TOTAL
mm 1 01-Jan-11 02-Jan-11 03-Jan-11 04-Jan-11 05-Jan-11 06-Jan-11 07-Jan-11 08-Jan-11 09-Jan-11 10-Jan-11 11-Jan-11 12-Jan-11 13-Jan-11 14-Jan-11 15-Jan-11 16-Jan-11 17-Jan-11 18-Jan-11 19-Jan-11 20-Jan-11 21-Jan-11 22-Jan-11 23-Jan-11 24-Jan-11 25-Jan-11 26-Jan-11 27-Jan-11 28-Jan-11 29-Jan-11 30-Jan-11 31-Jan-11 01-Feb-11 02-Feb-11 03-Feb-11 04-Feb-11 05-Feb-11 06-Feb-11 07-Feb-11 08-Feb-11 09-Feb-11 10-Feb-11 11-Feb-11 12-Feb-11 13-Feb-11 14-Feb-11 15-Feb-11 16-Feb-11 17-Feb-11 18-Feb-11
2 16.7 snow snow snow snow snow snow SNOW snow snow snow snow snow snow snow snow rn/sw snow snow snow snow snow snow rn/sw snow snow SNOW
snow snow 0.6 11.1 snow 0.6 snow
2.5
rain
3 s sw n nw w nw e N N e nw e nw ne wsw wnw nw e se w n nw N nw e ne W ne ese w e SE NE E E SE SSW W WNW E SE W WNW SSW SW SW SE S W
4
5
6
10.1 12.2 10.8 12 11 12 12 12.7 12.3 13 12 12 12 12 12.6 13.3 12 13 13 12 12 12.2 13.2 12 12 12 12.1 12 12.7 13.1 12 12 12 12 12 12 12.3 12 12 12 12 11 12 12.7 12 12 12 12 12
12 11.2 12.9 12 12 13 13 12.8 12.5 13 13 13 13 13 12.4 12.4 13 13 13 13 12 11.7 11.9 12 12 12 12.1 12 12.1 11.6 12 12 11 12 12 12.3 12.4 11 11 11 11 12 11.5 12 12 12 12 12 12
40.35 24.534 18.586 20.155 22.49 20.002 17.854 18.741 18.274 19.084 17.724 18.579 20.15 16.015 17.018 18.904 18.273 17.476 17.764 18.36 20.185 17.59 18.94 18.498 16.65 16.106 17.014 16.49 16.504 19.137 17.013 16.157 17.257 16.854 16.16 17.01 17.328 18.504 17.884 17.307 17.882 17.669 0.0169 17.075 18.143 18.026 17.711 26.691 35.42
O1
PLANT POLLUTION CONTROL OPERATIONS DIVISION-LABORATORY SERVICES SEWAGE
7
8
9
18.495 10.848 11.610 10.247 10.795 10.007 11.408 10.496 7.898 9.211 8.970 8.817 9.372 9.770 8.903 7.968 8.740 8.889 8.578 8.517 10.219 8.629 7.954 8.634 8.386 8.179 8.377 10.075 8.576 7.572 8.368 8.195 8.491 8.297 10.153 8.802 7.261 8.670 8.137 8.294 8.492 9.661 8.781 8.090 9.361 8.504 9.481 18.424 20.938
1.488
S U S B S O O P L D E I N D D S E D (mg/L) (mg/L) 10 11 12
HRS.
8.03
50
81
P pH A H M O M S O P N H I O A R U S (mg/L) (mg/L) 13 14 15 7.33
7.1
OXFORD ALL SECTIONS 17-Feb-12
ANALYSES BOD 5 DAY (mg/L)
SUSPENDED SOLIDS (mg/L) U V
RAW #1
RAW #2
C H A RAW N #1 N E L
U V RAW #2
pH
C H A RAW N #1 N E L
TOTAL PHOSPHORUS (mg/L) U V
RAW #2
C H A N N E L
U V RAW #1
RAW #2
NH3 (mg/L)
C H A N N E L
U V
C H A N N E L
UV D.O. CHANNEL PLANT E F F L U E N T
E. C O L I MPN
16
17
18
19
20
21
22
23
24
25
26
27
28
1.4 7 1 1 4
7.7 7.7 7.7 7.7
7.5 7.5 7.4 7.4
3.5 3.7 5.0
0.14 0.11 0.15
1
155 189 173 175
1 1 2 2 2
7.8 7.6 7.8 7.7 7.7
7.2 7.1 6.9 7.1 7.0
6.6 5.6 4.3 5.2
0.35 0.24 0.29 0.29
0.10 0.10
1 1
192 253 229 197 182
6 2 1 1 2
7.5 7.7 7.6 7.6 7.6
7.0 7.0 7.0 7.0 7.2
5.7 5.2
0.22 0.22
0.10 0.10
1.7 1
230 201 206 204 207
5.7
0.32
349 247 304 196 227
1 1 1 4 1
8.0 7.7 7.9 7.6 7.6
7.0 7.0 7.0 6.8 7.0
11.8 6.9
0.45 0.52
5.8
0.46
1 1 1 1 1
7.6 7.6 7.7 7.7 7.7
6.9 7.0 7.1 7.0 7.0
5.6 4.6
0.32 0.26
0.10
1.3
206 208 230 237 295
6.2 8.1
0.30 0.32
0.10
2 6 8 6 1
8.2 7.6 7.6 7.7 8.0
7.0 7.0 6.6 6.9 6.7
9.0 17.3 8.1
0.43 0.31 0.21
0.10
1.2 2.3
444 238 268 329 316
4.5
0.24
4 2 2 1 6
7.6 7.5 7.6 7.5 7.5
7.0 7.0 7.2 7.1 7.2
5.9 6.3 5.9
0.31 0.25 0.21
2.9 2.3
201 213 195 255 276
5.4
0.23
168
2
190
140 150
162 157
168
2
264
2
167
1.4
381
256 112
227 133
0.10 0.10
0.10 0.10
0.10 0.10
30
31 9.6 9.3 9.8 9.2 9.2 9.2 9.4 8.8 8.8 9.5 9.3 9.2 10.2 9.6 8.7 8.8 9.1 9.5 9.2 9.8 9.3 8.8 8.2 10.2 9.3 9.6 9.9 9.1 9.1 11.6 9.8 9.7 10.1 9.5 9.8 8.5 8.3 9.6 9.9 9.6 9.4 9.4 9 8.7 9 9.4 9 9.2 9.4
OXFORD 2011 PLANT SUMMARY CITY OF LONDON ENVIRONMENTAL SERVICES DEPT. WEATHER TEMP. FLOW THRU R W D C PLANT A I I I N R R F 103m3 A I PER DAY N D E F C W N A T A RATE L I L L O MAX. MIN. N
PLANT BY-PASS
VOLUME (103m3)
TOTAL
mm 1 19-Feb-11 20-Feb-11 21-Feb-11 22-Feb-11 23-Feb-11 24-Feb-11 25-Feb-11 26-Feb-11 27-Feb-11 28-Feb-11 01-Mar-11 02-Mar-11 03-Mar-11 04-Mar-11 05-Mar-11 06-Mar-11 07-Mar-11 08-Mar-11 09-Mar-11 10-Mar-11 11-Mar-11 12-Mar-11 13-Mar-11 14-Mar-11 15-Mar-11 16-Mar-11 17-Mar-11 18-Mar-11 19-Mar-11 20-Mar-11 21-Mar-11 22-Mar-11 23-Mar-11 24-Mar-11 25-Mar-11 26-Mar-11 27-Mar-11 28-Mar-11 29-Mar-11 30-Mar-11 31-Mar-11 01-Apr-11 02-Apr-11 03-Apr-11 04-Apr-11 05-Apr-11 06-Apr-11 07-Apr-11 08-Apr-11
2
7.6 snpw snow snow 1.9 rain rain snow rain 28.4 snow
rain rain 15.5 0.8
rain
rain snow snow
snow
rain
3 WNW ESE NE E S SW W W S SE w se s se s nnw s se e e se s wnw se s s w sw nw ese se sw e se e wnw n e s sw e sw wnw wnw sw e sw se s
4
5
6
11.7 12.7 11.5 11 11 11 11 11.7 11.7 8 10 11 11 10 10.3 10.3 10 10 10 10 10 10.9 10.1 9 9 10 10 10 10.3 10.2 10 10 10 10 10 10.6 8.9 9 10 10 10 10 11.6 11.7 11 10 10 11 11
10.2 10.8 10.6 10 11 11 11 10.9 10.9 8 10 10 11 11 10 9.6 10 11 10 9 9 10.8 10 10 10 10 10 10 9.9 10.2 10 10 10 10 10 9.8 10.1 10 10 11 11 11 10.9 11 11 11 10 10 11
24.353 18.427 12.22 19.383 20.497 17.735 17.309 16.768 17.991 39.027 22.856 18.832 19.972 19.864 41.095 26.492 24.401 26.153 32.283 31.316 26.191 23.409 23.417 19.001 20.314 25.465 23.965 25.084 22.602 12.826 29.196 23.535 26.301 43.38 26.691 21.269 21.304 23.221 21.673 20.985 19.893 19.344 20.495 19.122 27.788 25.235 22.713 24.121 19.872
O1
PLANT POLLUTION CONTROL OPERATIONS DIVISION-LABORATORY SERVICES SEWAGE
7
8 10.941 10.721 8.804 9.362 9.108 8.963 10.516 9.538 12.958 15.038 10.564 9.584 10.569 19.152 17.167 11.359 11.296 11.161 18.458 20.078 19.242 12.099 11.102 12.287 13.299 16.591 15.655 16.941 12.769 12.307 14.900 12.589 12.750 12.107 13.811 10.000 11.138 10.742 10.418 10.364 10.372 12.232 10.852 9.943 16.536 12.598 13.245 11.670 13.069
9
S U S B S O O P L D E I N D D S E D (mg/L) (mg/L) 10 11 12
HRS.
P pH A H M O M S O P N H I O A R U S (mg/L) (mg/L) 13 14 15
OXFORD ALL SECTIONS 17-Feb-12
ANALYSES BOD 5 DAY (mg/L)
SUSPENDED SOLIDS (mg/L) U V
RAW #1
RAW #2
C H A RAW N #1 N E L
U V RAW #2
pH
C H A RAW N #1 N E L
TOTAL PHOSPHORUS (mg/L) U V
RAW #2
C H A N N E L
U V RAW #1
RAW #2
NH3 (mg/L)
C H A N N E L
U V
UV D.O. CHANNEL PLANT
C H A N N E L
E F F L U E N T
E. C O L I MPN
16
17
18
19
20
21
22
23
24
25
26
27
3
197 191 224 222
3 1 1 1
7.8 7.7 7.8 7.7
7.5 7.4 7.4 7.3
96 115
2 2
203 291 161 167 162
1 10 1 1 1
7.6 7.4 7.7 7.8 7.8
7.3 7.1 7.5 7.6 7.2
170
1.7
1 1 2 2 2
7.7 7.8 7.8 7.7 7.6
7.6 7.6 7.6 7.6 7.5
0.44
1.8
165 163 158 173 176
2.7
101
2.8 3.3 2.7
0.27 0.36 0.15
1 1 2 1 6
7.7 7.7 7.9 7.6 7.5
7.6 7.6 7.7 7.6 7.5
3.1 2.8
0.29 0.10
2.3
0.10
2.8
0.24
3.0 5.4
0.18 0.17
4.4 3.9
0.14 0.30
279
2.4
136
88
1.3
95
1.6
173 175 54 203 141
81
1.9
208 216 84 136 213
4 1 1 2 1
7.7 7.6 7.6 7.7 7.7
7.7 7.6 7.6 7.6 7.4
103
1.2
93
2.2
243 219 216 135 169
1 1 1 1 1
7.7 7.7 7.7 7.6 8.1
7.6 7.4 7.5 7.5 7.6
1.3 1.4
152 224 190 170 141
9 4 1 1 1
7.8 7.5 7.6 7.7 7.6
7.5 7.5 7.6 7.6 7.6
232 119
5.2 3.8 5.3
0.14 0.18 0.27
3.4 2.4
0.21 0.39
4.8
0.15
28
30
0.13 0.10
0.10 0.10
0.10 0.10
0.10 0.10
3.6
0.16
2.3
0.41
2.9
0.16
0.10
0.10
0.10 0.10
OXFORD POLLUTION CONTROL PLANT 2011 ANNUAL REPORT FEBRUARY 2012
Oxford Pollution Control Plant 2011 Annual Report
February 2012
This annual report is in response to requirements under Certificate of Approval to Operate 34347J6HHY for the Oxford Pollution Control Plant. (a) A summary and interpretation of all monitoring data and a comparison to the effluent limits outlined in Condition 7, including an overview of the success and adequacy of the works; There were no monthly average compliance excursions for BOD, suspended solids, ammonia phosphorous and dissolved oxygen for the Oxford Pollution Control Plant in 2011 (see Table 1). Effluent pH ranged from 6.6 to 8.0 in 2011 which was within the compliance range of 6.0 to 9.5. The lowest raw pH was 7.2. The annual average daily flow for the Oxford Pollution Control Plant was 10.234 ML/day which was less than the Certificate of Approval limit of 17.25 ML/day. Section #1 has been out of service since May 15, 2008. Section #2 is rated at 13.62 ML/day and average flow in 2011 was at 75% of section #2 capacity. The works at the Oxford Pollution Control plant are sufficient to meet requirements. (b) A description of any operating problems encountered and corrective action taken; The Oxford plant section #1 was shut down in 2008 and the section 2 has operated well in 2011. (c) A summary of all maintenance carried out on any major structure, equipment, apparatus, mechanism or thing forming part of the Works; The Work Order list for the Oxford Pollution Control Plant is attached near the end of the report. (d) A summary of any effluent quality assurance or control measures undertaken in the reporting period; A Plant and effluent monitoring program was conducted and the data is in the tables of this report. All required samples were obtained in 2011. (e) A summary of the calibration and maintenance carried out on all effluent monitoring equipment; Flow meter calibrations are attached in the report. (f) A description of efforts made and results achieved in meeting the Effluent Objectives of Condition 6; The monthly average objectives for BOD, suspended solids, total phosphorous, ammonia, Dissolved Oxygen and E. Coli were achieved 100% of the time in 2011.
The pH objective range for the effluent is 6.5 to 9.0 and the objective was achieved 100% of the time in 2011. (g) A tabulation of the volume of sludge generated in the reporting period, an outline of anticipated volumes to be generated in the next reporting period and a summary of the locations to where the sludge was disposed. Sludge from Oxford Pollution Control Plant was hauled to the Greenway Pollution Control Centre for incineration. The total volume of sludge hauled from Oxford Pollution Control Plant in 2011 was 29,521 cubic metres. The 2011 average solids were 3.9%. Primary sludge and thickened waste are combined in the hauled waste tank. The City of London will continue to haul sludge to Greenway for dewatering and incineration. The 2012 sludge volume for the Oxford Pollution Control Plant is expected to be similar to the 2011 level. (h) A summary of any complaints received during the reporting period and any steps taken to address the complaints; There were no odour complaints in 2011. (i) A summary of all By-pass, spill or abnormal discharge events. There was one secondary by-pass event in 2011 and no raw sewage bypasses. The bypasses are listed in the report. The bypass event occurred on January 1, 2011. The secondary bypass volume for 2011 was 1.488 ML which is 0.04% of the total treated flow at the Oxford Pollution Control Plant in 2011.
TABLE 1 OXFORD PCP MONTHLY AVERAGE DATA FOR 2011 MONTH
JANUARY FEBRUARY MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
EFFLUENT BOD TEMPERATURE TOTAL FLOW RAW
UV CHANNEL
(C)
(ML/D)
(mg/L)
(mg/L)
12.4 11.2 10.1 11.6 13.5 16.3 19.1 20.4 20.3 18.7 17.0 14.7
9.500 10.157 13.308 11.687 11.704 9.597 8.211 8.287 8.902 9.825 9.777 11.867
175 211 105 139 103 175 146 189 191 128 178 160
1 2 2 2 1 1 1 1 1 2 2 2
15.4
10.235
158
2
15 15 15 15 10 10 10 10 10 10 10 15
14 21 23 19 15 13 11 11 12 17 17 20
259 259 259 259 173 173 173 173 173 173 173 259
216 249 170 187 168 252 230 270 288 264 270 223
2 3 2 2 2 2 2 2 1 2 1 2
232
2
5
OBJECTIVE AVERAGE
SUSPENDED SOLIDS pH TOTAL PHOSPHOROUS AMMONIA DISSOLVED OXYGEN MONTHLY GEOMETRIC UV UV UV UV MEAN LIMIT UV CHANNEL RAW UV LIMIT UV CHANNEL UV RAW UV LIMIT CHANNEL CHANNEL UV LIMIT LOWER E. COLI CHANNEL LOADING CHANNEL CHANNEL LOADING CHANNEL CHANNEL LOADING LOADING CHANNEL EFFLUENT LIMIT (ORGS./100MLS) LIMIT LIMIT LIMIT UV OBJECTIVE (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (KG/DAY) (KG/DAY) (mg/L) (mg/L) (mg/L) (mg/L) CHANNEL
NOTE: GRAY SHADING EXCEEDS OBJECTIVE BLACK SHADING EXCEEDS COMPLIANCE CRITERIA
10 10 10 10 10 10 10 10 10 10 10 10
19 30 21 23 21 18 14 18 13 15 10 22
173 173 173 173 173 173 173 173 173 173 173 173
7.1 7.1 7.6 7.5 7.5 7.4 7.2 7.3 7.3 7.6 7.5 7.8
5.68 6.45 3.38 3.89 4.68 6.28 5.85 6.36 6.31 6.72 6.12 4.98
0.29 0.27 0.22 0.25 0.40 0.37 0.42 0.38 0.42 0.34 0.34 0.25
7.4
5.56
0.33
5
0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65 0.65
2.7 2.7 3.0 2.9 4.7 3.6 3.4 3.2 3.7 3.3 3.3 2.9
17.3 17.3 17.3 17.3 17.3 17.3 17.3 11.2 11.2 11.2 11.2 11.2
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
0.5
5 5 5 5 3 3 3 3 3 3 3 5
9.4 9.2 9.5 8.7 8.2 8.1 7.4 7.8 7.9 8.1 8.3 8.4
2 or 4 3.3
0.1
5 5 5 5 4 4 4 4 4 4 4 5 5 OR 6
8.4
1 3 1 1 1 1
200 200 200 200 200 200
BY-PASSES OF SECONDARY TREATMENT IN 2011 OXFORD 2011 PLANT SUMMARY
O1
CITY OF LONDON
D A T E
01-Jan-11
PLANT
OXFORD ALL SECTIONS
ENVIRONMENTAL SERVICES DEPARTMENT POLLUTION CONTROL OPERATIONS DIVISION WEATHER SEWAGE ANALYSES UV CHANNEL TEMPERATU FLOW THROUGH R W D (C) PLANT PLANT BY-PASS BOD 5 DAY SUSPENDED PH TOTAL N E. D.O. A I I MILLION P (mg/L) SOLIDS PHOSPHOROUS H PLANT I N R R F GALLONS S PH A H (mg/L) (mg/L) 3 C N D E A I PER DAY FLOW HRS. U S M O O E F C W N (MGD) ML B S O M S U C U C U C U C L F A T A RATE O P L O P V H V H V H V H (mg/L) I F L I L D E I N H RAW RAW A RAW RAW A RAW RAW A RAW RAW A L L O MAX. MIN. TOTAL N D I O #1 #2 N #1 #2 N #1 #2 N #1 #2 N MPN U N D S A R N N N N E E U E E E E N D S L L L L T mm (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 16.7 s
10.1
12 40.35
18.495
1.488
8.03
50
81
7.33
7.1
1.4
9.6
OXFORD 2011 PLANT SUMMARY CITY OF LONDON ENVIRONMENTAL SERVICES DEPT. WEATHER TEMP. FLOW THRU R W D C PLANT A I I I N R R F 103m3 A I PER DAY N D E F C W N A T A RATE L I L L O MAX. MIN. N
PLANT BY-PASS
VOLUME (103m3)
TOTAL
mm 1 01-Jan-11 02-Jan-11 03-Jan-11 04-Jan-11 05-Jan-11 06-Jan-11 07-Jan-11 08-Jan-11 09-Jan-11 10-Jan-11 11-Jan-11 12-Jan-11 13-Jan-11 14-Jan-11 15-Jan-11 16-Jan-11 17-Jan-11 18-Jan-11 19-Jan-11 20-Jan-11 21-Jan-11 22-Jan-11 23-Jan-11 24-Jan-11 25-Jan-11 26-Jan-11 27-Jan-11 28-Jan-11 29-Jan-11 30-Jan-11 31-Jan-11 01-Feb-11 02-Feb-11 03-Feb-11 04-Feb-11 05-Feb-11 06-Feb-11 07-Feb-11 08-Feb-11 09-Feb-11 10-Feb-11 11-Feb-11 12-Feb-11 13-Feb-11 14-Feb-11 15-Feb-11 16-Feb-11 17-Feb-11 18-Feb-11
2 16.7 snow snow snow snow snow snow SNOW snow snow snow snow snow snow snow snow rn/sw snow snow snow snow snow snow rn/sw snow snow SNOW
snow snow 0.6 11.1 snow 0.6 snow
2.5
rain
3 s sw n nw w nw e N N e nw e nw ne wsw wnw nw e se w n nw N nw e ne W ne ese w e SE NE E E SE SSW W WNW E SE W WNW SSW SW SW SE S W
4
5
6
10.1 12.2 10.8 12 11 12 12 12.7 12.3 13 12 12 12 12 12.6 13.3 12 13 13 12 12 12.2 13.2 12 12 12 12.1 12 12.7 13.1 12 12 12 12 12 12 12.3 12 12 12 12 11 12 12.7 12 12 12 12 12
12 11.2 12.9 12 12 13 13 12.8 12.5 13 13 13 13 13 12.4 12.4 13 13 13 13 12 11.7 11.9 12 12 12 12.1 12 12.1 11.6 12 12 11 12 12 12.3 12.4 11 11 11 11 12 11.5 12 12 12 12 12 12
40.35 24.534 18.586 20.155 22.49 20.002 17.854 18.741 18.274 19.084 17.724 18.579 20.15 16.015 17.018 18.904 18.273 17.476 17.764 18.36 20.185 17.59 18.94 18.498 16.65 16.106 17.014 16.49 16.504 19.137 17.013 16.157 17.257 16.854 16.16 17.01 17.328 18.504 17.884 17.307 17.882 17.669 0.0169 17.075 18.143 18.026 17.711 26.691 35.42
O1
PLANT POLLUTION CONTROL OPERATIONS DIVISION-LABORATORY SERVICES SEWAGE
7
8
9
18.495 10.848 11.610 10.247 10.795 10.007 11.408 10.496 7.898 9.211 8.970 8.817 9.372 9.770 8.903 7.968 8.740 8.889 8.578 8.517 10.219 8.629 7.954 8.634 8.386 8.179 8.377 10.075 8.576 7.572 8.368 8.195 8.491 8.297 10.153 8.802 7.261 8.670 8.137 8.294 8.492 9.661 8.781 8.090 9.361 8.504 9.481 18.424 20.938
1.488
S U S B S O O P L D E I N D D S E D (mg/L) (mg/L) 10 11 12
HRS.
8.03
50
81
P pH A H M O M S O P N H I O A R U S (mg/L) (mg/L) 13 14 15 7.33
7.1
OXFORD ALL SECTIONS 17-Feb-12
ANALYSES BOD 5 DAY (mg/L)
SUSPENDED SOLIDS (mg/L) U V
RAW #1
RAW #2
C H A RAW N #1 N E L
U V RAW #2
pH
C H A RAW N #1 N E L
TOTAL PHOSPHORUS (mg/L) U V
RAW #2
C H A N N E L
U V RAW #1
RAW #2
NH3 (mg/L)
C H A N N E L
U V
C H A N N E L
UV D.O. CHANNEL PLANT E F F L U E N T
E. C O L I MPN
16
17
18
19
20
21
22
23
24
25
26
27
28
1.4 7 1 1 4
7.7 7.7 7.7 7.7
7.5 7.5 7.4 7.4
3.5 3.7 5.0
0.14 0.11 0.15
1
155 189 173 175
1 1 2 2 2
7.8 7.6 7.8 7.7 7.7
7.2 7.1 6.9 7.1 7.0
6.6 5.6 4.3 5.2
0.35 0.24 0.29 0.29
0.10 0.10
1 1
192 253 229 197 182
6 2 1 1 2
7.5 7.7 7.6 7.6 7.6
7.0 7.0 7.0 7.0 7.2
5.7 5.2
0.22 0.22
0.10 0.10
1.7 1
230 201 206 204 207
5.7
0.32
349 247 304 196 227
1 1 1 4 1
8.0 7.7 7.9 7.6 7.6
7.0 7.0 7.0 6.8 7.0
11.8 6.9
0.45 0.52
5.8
0.46
1 1 1 1 1
7.6 7.6 7.7 7.7 7.7
6.9 7.0 7.1 7.0 7.0
5.6 4.6
0.32 0.26
0.10
1.3
206 208 230 237 295
6.2 8.1
0.30 0.32
0.10
2 6 8 6 1
8.2 7.6 7.6 7.7 8.0
7.0 7.0 6.6 6.9 6.7
9.0 17.3 8.1
0.43 0.31 0.21
0.10
1.2 2.3
444 238 268 329 316
4.5
0.24
4 2 2 1 6
7.6 7.5 7.6 7.5 7.5
7.0 7.0 7.2 7.1 7.2
5.9 6.3 5.9
0.31 0.25 0.21
2.9 2.3
201 213 195 255 276
5.4
0.23
168
2
190
140 150
162 157
168
2
264
2
167
1.4
381
256 112
227 133
0.10 0.10
0.10 0.10
0.10 0.10
30
31 9.6 9.3 9.8 9.2 9.2 9.2 9.4 8.8 8.8 9.5 9.3 9.2 10.2 9.6 8.7 8.8 9.1 9.5 9.2 9.8 9.3 8.8 8.2 10.2 9.3 9.6 9.9 9.1 9.1 11.6 9.8 9.7 10.1 9.5 9.8 8.5 8.3 9.6 9.9 9.6 9.4 9.4 9 8.7 9 9.4 9 9.2 9.4
OXFORD 2011 PLANT SUMMARY CITY OF LONDON ENVIRONMENTAL SERVICES DEPT. WEATHER TEMP. FLOW THRU R W D C PLANT A I I I N R R F 103m3 A I PER DAY N D E F C W N A T A RATE L I L L O MAX. MIN. N
PLANT BY-PASS
VOLUME (103m3)
TOTAL
mm 1 19-Feb-11 20-Feb-11 21-Feb-11 22-Feb-11 23-Feb-11 24-Feb-11 25-Feb-11 26-Feb-11 27-Feb-11 28-Feb-11 01-Mar-11 02-Mar-11 03-Mar-11 04-Mar-11 05-Mar-11 06-Mar-11 07-Mar-11 08-Mar-11 09-Mar-11 10-Mar-11 11-Mar-11 12-Mar-11 13-Mar-11 14-Mar-11 15-Mar-11 16-Mar-11 17-Mar-11 18-Mar-11 19-Mar-11 20-Mar-11 21-Mar-11 22-Mar-11 23-Mar-11 24-Mar-11 25-Mar-11 26-Mar-11 27-Mar-11 28-Mar-11 29-Mar-11 30-Mar-11 31-Mar-11 01-Apr-11 02-Apr-11 03-Apr-11 04-Apr-11 05-Apr-11 06-Apr-11 07-Apr-11 08-Apr-11
2
7.6 snpw snow snow 1.9 rain rain snow rain 28.4 snow
rain rain 15.5 0.8
rain
rain snow snow
snow
rain
3 WNW ESE NE E S SW W W S SE w se s se s nnw s se e e se s wnw se s s w sw nw ese se sw e se e wnw n e s sw e sw wnw wnw sw e sw se s
4
5
6
11.7 12.7 11.5 11 11 11 11 11.7 11.7 8 10 11 11 10 10.3 10.3 10 10 10 10 10 10.9 10.1 9 9 10 10 10 10.3 10.2 10 10 10 10 10 10.6 8.9 9 10 10 10 10 11.6 11.7 11 10 10 11 11
10.2 10.8 10.6 10 11 11 11 10.9 10.9 8 10 10 11 11 10 9.6 10 11 10 9 9 10.8 10 10 10 10 10 10 9.9 10.2 10 10 10 10 10 9.8 10.1 10 10 11 11 11 10.9 11 11 11 10 10 11
24.353 18.427 12.22 19.383 20.497 17.735 17.309 16.768 17.991 39.027 22.856 18.832 19.972 19.864 41.095 26.492 24.401 26.153 32.283 31.316 26.191 23.409 23.417 19.001 20.314 25.465 23.965 25.084 22.602 12.826 29.196 23.535 26.301 43.38 26.691 21.269 21.304 23.221 21.673 20.985 19.893 19.344 20.495 19.122 27.788 25.235 22.713 24.121 19.872
O1
PLANT POLLUTION CONTROL OPERATIONS DIVISION-LABORATORY SERVICES SEWAGE
7
8 10.941 10.721 8.804 9.362 9.108 8.963 10.516 9.538 12.958 15.038 10.564 9.584 10.569 19.152 17.167 11.359 11.296 11.161 18.458 20.078 19.242 12.099 11.102 12.287 13.299 16.591 15.655 16.941 12.769 12.307 14.900 12.589 12.750 12.107 13.811 10.000 11.138 10.742 10.418 10.364 10.372 12.232 10.852 9.943 16.536 12.598 13.245 11.670 13.069
9
S U S B S O O P L D E I N D D S E D (mg/L) (mg/L) 10 11 12
HRS.
P pH A H M O M S O P N H I O A R U S (mg/L) (mg/L) 13 14 15
OXFORD ALL SECTIONS 17-Feb-12
ANALYSES BOD 5 DAY (mg/L)
SUSPENDED SOLIDS (mg/L) U V
RAW #1
RAW #2
C H A RAW N #1 N E L
U V RAW #2
pH
C H A RAW N #1 N E L
TOTAL PHOSPHORUS (mg/L) U V
RAW #2
C H A N N E L
U V RAW #1
RAW #2
NH3 (mg/L)
C H A N N E L
U V
UV D.O. CHANNEL PLANT
C H A N N E L
E F F L U E N T
E. C O L I MPN
16
17
18
19
20
21
22
23
24
25
26
27
3
197 191 224 222
3 1 1 1
7.8 7.7 7.8 7.7
7.5 7.4 7.4 7.3
96 115
2 2
203 291 161 167 162
1 10 1 1 1
7.6 7.4 7.7 7.8 7.8
7.3 7.1 7.5 7.6 7.2
170
1.7
1 1 2 2 2
7.7 7.8 7.8 7.7 7.6
7.6 7.6 7.6 7.6 7.5
0.44
1.8
165 163 158 173 176
2.7
101
2.8 3.3 2.7
0.27 0.36 0.15
1 1 2 1 6
7.7 7.7 7.9 7.6 7.5
7.6 7.6 7.7 7.6 7.5
3.1 2.8
0.29 0.10
2.3
0.10
2.8
0.24
3.0 5.4
0.18 0.17
4.4 3.9
0.14 0.30
279
2.4
136
88
1.3
95
1.6
173 175 54 203 141
81
1.9
208 216 84 136 213
4 1 1 2 1
7.7 7.6 7.6 7.7 7.7
7.7 7.6 7.6 7.6 7.4
103
1.2
93
2.2
243 219 216 135 169
1 1 1 1 1
7.7 7.7 7.7 7.6 8.1
7.6 7.4 7.5 7.5 7.6
1.3 1.4
152 224 190 170 141
9 4 1 1 1
7.8 7.5 7.6 7.7 7.6
7.5 7.5 7.6 7.6 7.6
232 119
5.2 3.8 5.3
0.14 0.18 0.27
3.4 2.4
0.21 0.39
4.8
0.15
28
30
0.13 0.10
0.10 0.10
0.10 0.10
0.10 0.10
3.6
0.16
2.3
0.41
2.9
0.16
0.10
0.10
0.10 0.10
