ANNUAL COMPLIANCE REPORT

Transcription

1 REGIONAL MUNICIPALITY OF NIAGARA Public Works Department Water & Wastewater Services Division NIAGARA FALLS WATER TREATMENT PLANT Ministry of the Environment Certificate of Approval No S66 ANNUAL COMPLIANCE REPORT January 1 to December 31, 2002 Chado Brcic, M.Sc., P.Eng. Director Water & Wastewater Services Water & Wastewater Services Division

2 Compliance Report 2002 Niagara Falls Water Treatment System Compliance with Terms and Conditions of the Certificate of Approval No S66 1. PERFORMANCE 1.1 Compliance with Ontario Drinking Water Standards The Niagara Falls Water Treatment System was operated and maintained in such a manner, and with such facilities that the water supplied to the consumers satisfied the requirements set out in the Ontario Drinking Water Standards. 1.2 Maximum Flow Rates The Niagara Falls Water Treatment Plant is operated to treat water at a rate not to exceed the maximum flow rate of 145,475 m 3 /day. The Regional Municipality of Niagara has a valid Permit to Take Water #00-P-2501 (amended, expires March 31, 2010), which allows the Niagara Falls Water Treatment Plant to take water via the Niagara River. These rates were not exceeded in Compliance with Procedure B13-3 Treated Water Quality Under Maximum Flow Conditions The Niagara Falls Water Treatment Plant, which treats surface water, is required to achieve a minimum of 3-log removal/inactivation of giardia cysts and 4-log removal/inactivation of viruses at all times, at or before the first consumer's connection, through a combination of filtration and continuous disinfection. Niagara Falls Water Treatment System Page 1

3 The Engineer's Report completed in March 2001 indicated that the Niagara Falls Water Treatment Plant met the requirements for virus inactivation under all operating conditions, however is inadequate for giardia cysts at all times except possible a few weeks in the summer when the temperature of the treated water rises above 20 C. Works to comply with B13-3 are all scheduled to be completed by December 31, Compliance with B13-3 "Chlorination of Potable Water Supplies in Ontario" - Operation and Maintenance of Disinfection Facilities The Regional Municipality of Niagara ensures that the disinfection facilities in The Niagara Falls Water Treatment Plant are operated and maintained in such a manner as is necessary to be in accordance with the Ministry Procedure B13-3 entitled Chlorination of Potable Water Supplies in Ontario 1.5 Operation and Maintenance of Backwash/Wastewater Treatment Facilities The Regional Municipality of Niagara ensures that the Backwash/Wastewater treatment facilities are operated and maintained in such a manner that the annual average of the monthly concentration of suspended solids in the backwash/wastewater treatment facilities effluent discharged to the Niagara River, does not exceed 25 mg/l. 2. MONITORING AND RECORDING 2.1 Flow Measurement (a-d) The Niagara Falls Water Treatment System maintains and operates a sufficient number of flow-measuring devices, which are used to measure the flow rate and daily quantity of water being taken from the Niagara River. These flow-measuring devices are also used to measure the flow rate of treated water to the distribution system. The flow is monitored by the following meters: Raw Water 2 Filter Effluent 12 Filter to Waste 3 Filter Backwash 1 Treated Water 2 The calibration of these flow meters is completed by an outside source, at intervals not to exceed one year. Thus ensuring their accuracy to ± 5% of the actual rate of flow within the range of 10% to 100% of full scale. A complete record of all these calibration reports is maintained and kept up to date at the Niagara Falls Water Treatment Plant. The flow rate and daily quantity of raw water is monitored continuously and recorded daily. The flow rate of treated water is monitored continuously and recorded daily. Excedences of the maximum flow rate will be stopped when the reservoir is built at the plant site by December 31, Niagara Falls Water Treatment System Page 2

4 RAW RAW TREATED Maximum Rate Maximum Day Maximum Rate MONTH Pumped (M 3 /D) Pumped (m 3 ) Pumped (m 3 ) January 161,455 46,858 68,821 February 120,263 48,492 63,388 March 155,123 47,556 71,103 April 159,730 48,399 61,332 May 149,477 60,090 75,701 June 138,780 63,542 85,255 July 143,747 98, ,246 August 132,845 77, ,800 September 144,525 74,581 99,706 October 111,374 71,093 73,852 November 113,160 49,079 62,370 December 108,444 46,946 64,892 AVERAGE 80,206 MAXIMUM 161,455 98, , , , , ,000 M 3 /day 100,000 80,000 60,000 40,000 20,000 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2002 RAW MAXIMUM RATE RAW MAXIMUM DAY TREATED MAXIMUM RATE Niagara Falls Water Treatment System Page 3

5 Water flows were within the capacity of the plant to supply at the required quality. MONTH TREATED AVERAGE DAY PUMPED (m 3 ) TREATED MAXIMUM DAY PUMPED (m 3 ) January 40,054 42,751 February 40,694 44,710 March 41,239 44,750 April 41,291 45,436 May 43,882 54,258 June 51,314 62,371 July 67,317 83,000 August 66,846 76,260 September 59,583 74,163 October 46,386 51,875 November 41,929 48,850 December 40,583 44,380 AVERAGE 48,427 MAXIMUM 83, , , , ,000 M 3 /day 80,000 60,000 40,000 20,000 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2002 AVERAGE DAY MAXIMUM DAY NOMINAL CAPACITY Page 4

6 A summary of records made under Condition 2.1 related to flow rate exceedances, and a summary of analytical results of sampling required by the certificate, including raw water and in-process parameters as specified in the operations manual in accordance with Condition 3.10 Date Time Duration Cause January Low lift pump control January Low lift pump control January Low lift pump control March Numerous power failures March Low lift pump control March Low lift pump control April hrs 4 minutes Low lift pump control May hrs 6 minutes SCADA fault -- data not available 2.1(e) Chlorine Analyzers This water treatment plant maintains and operates a sufficient number of continuous water quality analyzers and indicators with alarm systems. The chlorine analyzers monitor the free chlorine residual in treated water at the point of entrance to the distribution system and are calibrated to a quality control band of ± 0.05 mg/l at a chlorine concentration of 1.0 mg/l or a proportionately wider band where plant stream contains higher concentrations of chlorine. Turbidimeters are used to monitor the quality of filtered water at the point were it discharges each filter and are calibrated to a quality control band of ± 0.1 NTU at each filter. There is only one chlorine analyser on the two treated water lines. However, only one line is used at a time. An additional analyser will be added in (f) Raw and Treated Water Sampling and Analysis Samples of raw water and treated water were collected and analyzed for parameters at locations and frequencies in accordance with Regulation 459/00, Drinking Water Protection, Schedule 2, Sampling and Analysis Requirements. This sampling required was preformed in a manner that ensures samples have a composition which was representative of the water stream from which they were taken. The sampling procedure is also in accordance with the instructions provided by the accredited laboratory engaged to perform the analyses. The sampling regimen was changed from the requirements from the previous Certificates of Approval to this Certificate of Approval in the 3 rd quarter. A summary of these sampling results is included in Appendix 'A' Page 5

7 2.1(g) Backwash/Wastewater Sampling and Analysis Composite samples of the backwash/wastewater are taken monthly at the point of discharge to the Niagara River and analyzed for suspended solids. The annual average of the monthly concentration of suspended solids in the backwash/wastewater effluent discharge is not to exceed 25mg/L. A summary of the monthly sampling results is provided below: Total Suspended Solids Minimum: < 2.00 mg/l Maximum: mg/l Average: < 5.26 mg/l SUMMARY OF MONTHLY COMPOSITE SAMPLES ANALYSIS DONE BY SGS Lakefield Research (Certified Laboratory) mg/l mg/l January 5.60 July < 2.60 February 6.25 August < 2.00 March September < 2.00 April 5.80 October < 6.50 May November < 3.50 June 3.50 December Total Suspended Solids - mg/l JAN FEB MAR APR MAY JUNE JULY AUG SEPT OCT NOV DEC total suspended solids - mg/l Maximum Page 6

8 The sampling required by clauses (f) and (g) above shall be performed in a manner that ensures samples have a composition which is representative of the water stream from which they are taken and also in accordance with the instructions provided by the accredited laboratory engaged to perform the analyses. The samples taken were representative of the water being monitored. The Owner shall retain for a minimum of five (5) years from the date of their creation, all records and information related to or resulting from the monitoring, sampling and analyzing activities required by this 2.2 Retention of Records All records and information related to or resulting from the monitoring, sampling, and analyzing activities are maintained for a minimum of five years from their creation. 3. OPERATIONS AND MAINTENANCE 3.1 Decision Making The Owner, when making decisions within its authority, shall consider the impact of these decisions on the Drinking water supply source for water works approved by this Certificate. Niagara considers the impact of discharges upstream of the plant. 3.2 Repairs to water Supply or Distribution System Any repairs to the water supply or distribution system, or interruptions in the operation of the water supply resulting in negative pressure conditions in the distribution system, the affected parts of the water supply have been adequately disinfected in accordance with the Ministry Procedure B13-3 entitled Chlorination of potable water Supplies in Ontario. 3.3 Operator License All operators at Niagara Falls Water Treatment Plant hold a valid license that is applicable to this type of water treatment plant and that is the same class or higher than the class determined for the plant in accordance with Ontario Regulation 435/93. Plant License #332 (Oct 9, 1987): Class III POSITION TREATMENT CERTIFICATION Water Operations Manager IV Water Maintenance Manager III Area Maintenance Person - Certified Electrician OIT Maintenance Person - Water III Area Maintenance Person II Page 7

9 Senior Operator Senior Operator Senior Operator Skilled Labourer Skilled Labourer Labourer III III III IV III I 3.4 Operation and Maintenance of Works, Equipment and Appurtenances The Regional Municipality of Niagara exercises due diligence in ensuring that at all times the works and related equipment and appurtenances used to achieve compliance with the Certificate of Approval are properly operated and maintained. Proper operation and maintenance shall include effective performance, adequate funding, adequate operator staffing and training, including training in all procedures and other requirements of the certificate and the Act and Regulations. Also required are adequate laboratory facilities, process controls and alarms, and the use of process chemicals and other substances that come in contact with the water being treated, that are suitable for the process, Compatible with each other and appropriate for drinking water. 3.5 Chemical Usage All chemical used in the treatment process and all materials contacting the water meet both the American water Works Association (AWWA) quality criteria as set out in the AWWA standards and the American Standards Institute (ANSI) safety criteria as set out in ANSI standard NSF/60 or NSF/61. Listed below are the chemicals and their average dosages used at the Niagara Falls Water Treatment Plant in 2002: There were no abnormal chemical usages. TASTE & ODOUR DISINFECTANT COAGULANT CONTROL 12% SODIUM CLAR+ION POWDERED HYPOCHLORITE A7 ACTIVATED CARBON AMOUNT DOSAGE AMOUNT DOSAGE AMOUNT DOSAGE MONTH LITRES mg/l LITRES mg/l kg mg/l January 15, , February 15, , March 17, , April 17, , May 17, , June 22, , July 30, , August 32, , September 26, , October 23, , November 18, , December 17, , TOTAL 229, ,951 0 AVERAGE 19, , Page 8

10 mg/l J A N F E B M A R A P R M A Y J U N E J U L Y A U G S E P T O C T N O V D E C S O D I U M H Y P O C H L O R I T E mg/l JA N FEB M A R A PR M A Y JUN E JU LY A UG S EPT O CT NO V D EC 2002 C L A R + IO N A 7 Page 9

11 3.6 Discontinuation of Chemical Usage The Regional Municipality of Niagara acknowledges that upon written notice by the Director of the MOE we shall discontinue use of any chemical noted. No notices were received in Notification of Medical Officer of Health There are written procedures in place for notifying the Medical Officer of Health and the Ministry of the Environment as required by Ontario Regulation 459/00. These procedures are known to all employees and have been followed. 3.8 Contingency Plans and Procedures Contingency plans and procedures have been established and adequate equipment and material are available for dealing with emergencies, upset conditions and equipment breakdowns in the works, and such procedures are being followed. 3.9 Operations Manual The Niagara Falls Water Treatment Plant has on file an operations manual that incorporates operation and maintenance requirements and can be made available for inspection Operations and Maintenance of Monitoring Equipment The operations manual includes monitoring and reporting of the necessary raw water and in-process parameters that are essential for control of the treatment process and for the assessment of the performance of the works. The operations manual also contains procedures that are required for adequate operation and maintenance of the monitoring equipment Record Drawings for New Water Works The Regional Municipality of Niagara recognizes that within one year of substantial completion as constructed drawings for the new water works outlined in Certificate of Approval S66 shall be prepared and kept up-to-date. Niagara will comply with this requirement of the Certificate of Approval Process and Instrumentation Diagram (PID) Process and Instrumentation Diagrams (PID) and up-to-date record drawing and diagrams for the water treatment plant, which include modifications made to the works or the water plant are on file at Niagara Falls Water Treatment Plant Record Drawings Niagara's practice is to have "as built" drawings prepared immediately after a capital project is completed. Comprehensive record drawings and diagrams are kept up-to-date and are available on-site. Page 10

12 3.14 Compliant Procedure The Regional Municipality of Niagara has procedures in place for receiving, responding to, and recording complaints about any aspects of the works, including the steps taken, if any, to determine the cause of complaint and corrective measures taken to alleviate the cause and prevent its reoccurrence. 4. COMPLIANCE REPORT The Regional Municipality of Niagara has prepared this Compliance Report for the Niagara Falls Water Treatment Plant in accordance with the Terms and Conditions of Certificate of Approval S66. This is the first Compliance Report to be completed to cover the period January 1 to December 31, 2002 and has been prepared based on our interpretation of the requirements outlined in the Certificate of Approval. The Ministry of Environment did not provide any direction or template to assist with the preparation of this document. Niagara will provide updates and clarification to the annual Compliance Report based on feedback from the Ministry of Environment. This Compliance Report will be presented to Regional Council between April 1 and June 30, 2003, Copies of the Compliance will be made available for inspection by any member of the public during normal business hours without charge. Non-Compliance with terms and Conditions of Certificate of Approval There were no non-compliance with the Terms and Conditions of the Certificate of Approval in UPGRADING REQUIREMENTS The Regional Municipality of Niagara is in the process of implementing physical and operational improvements to the works, as required by the current Certificate of Approval and keeping with the recommendations of the Engineers Report dated March Application will be made for a Certificate of Approval to cover the required works. Completion of the upgrading requirements is scheduled for December 31, SUBSEQUENT ENGINEERS' REPORTS The submission date for the first Engineers Report was March 31, The proposed Safe Drinking Water Act will extend the requirement for a second and subsequent Engineers Reports to a 5-year period. The next Engineers Report is due by March 31, It will be done in compliance with the appropriate Terms of Reference. 7. REVOCATION OF EXISTING APPROVALS The Regional Municipality of Niagara has retained supporting documentation for previous Certificate of Approvals that are now replaced by Certificate of Approval S66. Page 11

13 8. INFORMATION Niagara acknowledges that this Certificate of Approval forms only part of the regulatory framework within which Niagara s Water Treatment Plant operates in. 9. CHANGE OF OWNERSHIP The Regional Municipality of Niagara shall notify the local District office of the Ministry in writing of any changes as outlined under condition 9 of the Certificate of Approval within 30 days of the change occurring. There has been no change of ownership in INTERPRETATION (Severability and Conflicts) 10.1 The requirements of this certificate are severable. If any requirement of this certificate, or the application of any requirement of this certificate to any circumstance, is held invalid, the application of such requirement to other circumstances and the remainder of this certificate shall not be affected thereby In all matters requiring the interpretation and implementation of this certificate, the conditions of the certificate shall take precedence, followed by the documentation submitted in support of the applications associated with any previously issued certificates of approval for works which are part of the works approved by this certificate. Conditions 10.1 and 10.2 are included to clarify how the certificate is to be judicially interpreted, and specifically, to clarify that the requirements of the certificate are severable and that they prevail over supporting documentation. Niagara acknowledges this interpretation. Page 12

14 APPENDIX 'A'

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16 TABLE A TOTAL COLIFORM (CFU/100mL) MAC = * indicator of adverse water quality if detected in treated water Free Chlorine Residual MAC = > 0.05 mg/l BACTERIOLOGICAL RESULTS RAW WATER - Niagara River TREATED WATER - 900mm WM KENT RESERVOIR LUNDY'S LANE TANK TEST & SAMPLE DATE RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL January 2, January 7, January 14, January 21, January 28, February 4, 2002 > February 11, February 18, February 25, March 4, 2002 > March 11, March 18, March 25, April 2, April 8, April 15, April 22, April 29, May 6, May 13, May 21, May 27, June 3, 2002 < June 10, 2002 < June 17, June 24, July 2, July 8, July 15, July 22, July 29, August 6, August 12, August 19, August 26, September 3, September 9, September 16, September 23, September 30, October 7, October 15, October 21, October 28, November 4, November 11, November 18, November 25, December 2, December 9, December 16, December 23, December 30, 2002 < Page 14

17 ESCHERICHIA COLI - E COLI (CFU/100mL) MAC = * indicator of adverse water quality if detected in treated water Effective Jun 24, 2002: Raw testing = Membrane Filtration based on 100 ml; Treated & Distribution testing = P-A based on 100 ml BACTERIOLOGICAL RESULTS RAW WATER - Niagara River TREATED WATER - 900mm WM KENT RESERVOIR LUNDY'S LANE TANK TEST & SAMPLE DATE RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL January 2, January 7, 2002 < January 14, 2002 < January 21, January 28, 2002 < February 4, February 11, February 18, February 25, 2002 < March 4, March 11, March 18, 2002 < March 25, April 2, April 8, 2002 < April 15, April 22, 2002 < April 29, May 6, 2002 < May 13, May 21, May 27, 2002 < June 3, 2002 < June 10, 2002 < June 17, NR NR NR June 24, A A A July 2, A A A July 8, A A A July 15, A A A July 22, A A A July 29, A A A August 6, 2002 < A A A August 12, A A A August 19, A A A August 26, A A A September 3, A A A September 9, A A A September 16, 2002 < A A A September 23, 2002 < A A A September 30, 2002 < A A A October 7, A A A October 15, A A A October 21, A A A October 28, 2002 < A A A November 4, 2002 < A A A November 11, A A A November 18, A A A November 25, A A A December 2, A A A December 9, A A A December 16, A A A December 23, A A A December 30, A A A Page 15

18 BACKGROUND - TOTAL COLIFORM (CFU/100mL) MAC = 200 colonies/100ml BACTERIOLOGICAL RESULTS RAW WATER - Niagara River TREATED WATER - 900mm WM KENT RESERVOIR LUNDY'S LANE TANK TEST & SAMPLE DATE RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL January 2, 2002 > January 7, January 14, 2002 > January 21, 2002 > January 28, 2002 > February 4, 2002 > February 11, 2002 > February 18, 2002 > February 25, March 4, 2002 > March 11, 2002 > March 18, March 25, 2002 > April 2, 2002 > April 8, April 15, 2002 > April 22, April 29, 2002 > May 6, May 13, 2002 > May 21, 2002 > May 27, 2002 > June 3, June 10, June 17, 2002 > June 24, 2002 > July 2, 2002 > July 8, 2002 > July 15, 2002 > July 22, 2002 > July 29, 2002 > August 6, 2002 > August 12, 2002 > August 19, 2002 > August 26, 2002 > September 3, 2002 > September 9, 2002 > September 16, 2002 > September 23, 2002 > September 30, 2002 > October 7, 2002 > October 15, 2002 > October 21, 2002 > October 28, 2002 > November 4, 2002 > November 11, 2002 > November 18, 2002 > November 25, 2002 > December 2, 2002 > December 9, 2002 > December 16, 2002 > December 23, 2002 NA December 30, 2002 > Page 16

19 FECAL COLIFORM (CFU/100mL) MAC = * indicator of adverse water quality if detected in treated water BACTERIOLOGICAL RESULTS RAW WATER - Niagara River TREATED WATER - 900mm WM KENT RESERVOIR LUNDY'S LANE TANK TEST & SAMPLE DATE RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL January 2, January 7, 2002 < January 14, January 21, January 28, February 4, February 11, February 18, February 25, March 4, March 11, March 18, 2002 < March 25, April 2, April 8, 2002 < April 15, April 22, 2002 < April 29, May 6, 2002 < May 13, May 21, May 27, 2002 < June 3, 2002 < June 10, 2002 < June 17, June 24, July 2, July 8, July 15, July 22, July 29, August 6, August 12, August 19, August 26, September 3, September 9, September 16, September 23, September 30, 2002 < October 7, October 15, October 21, October 28, November 4, November 11, November 18, November 25, December 2, December 9, December 16, December 23, December 30, Page 17

20 HPC - HETEROTROPHIC BACTERIA (CFU/mL) MAC = 500 colonies/ml BACTERIOLOGICAL RESULTS RAW WATER - Niagara River TREATED WATER - 900mm WM KENT RESERVOIR LUNDY'S LANE TANK TEST & SAMPLE DATE RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL RESULT TIME FREE TOTAL January 2, 2002 NA January 7, 2002 NA January 14, 2002 NA January 21, 2002 NA January 28, 2002 NA February 4, 2002 NA February 11, 2002 NA February 18, 2002 NA February 25, 2002 NA March 4, 2002 NA March 11, 2002 NA March 18, 2002 NA March 25, 2002 NA April 2, 2002 NA April 8, 2002 NA April 15, 2002 NA April 22, 2002 NA April 29, 2002 NA May 6, 2002 NA May 13, 2002 NA May 21, 2002 NA May 27, 2002 NA June 3, 2002 NA June 10, 2002 NA June 17, 2002 NA June 24, 2002 NA July 2, 2002 NA July 8, 2002 NA July 15, 2002 NA July 22, 2002 NA July 29, 2002 NA August 6, 2002 NA August 12, 2002 NA August 19, 2002 NA August 26, 2002 NA September 3, 2002 NA September 9, 2002 NA September 16, 2002 NA September 23, 2002 NA September 30, 2002 NA October 7, 2002 NA October 15, 2002 NA October 21, 2002 NA October 28, 2002 NA November 4, 2002 NA November 11, 2002 NA November 18, 2002 NA November 25, 2002 NA December 2, 2002 NA December 9, 2002 NA December 16, 2002 NA December 23, 2002 NA December 30, 2002 NA Page 18

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22 TABLE B CHEMICAL RESULTS MAC or DISTRIBUTION DISTRIBUTION DISTRIBUTION END PROCESS WASTE TEST & SAMPLE DATE Frequency IMAC RAW WATER TREATED WATER LUNDY'S LANE TANK KENT RESERVOIR BEVAN HEIGHTS SUPERNATANT 11-DICHLOROETHYLENE (vinylidene chloride) mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < DICHLOROBENZENE 0.2 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < DICHLOROETHANE mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < DICHLOROBENZENE mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < BENZENE mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < CARBON TETRACHLORIDE mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < CHLOROBENZENE (Monochlorobenzene) 0.08 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < DICHLOROMETHANE 0.05 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < ETHYLBENZENE mg/l, AO February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < Page 19

23 TETRACHLOROETHYLENE mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < TOLUENE TRICHLOROETHYLENE TRIHALOMETHANES (TOTAL) VINYL CHLORIDE XYLENE mg/l, AO February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < August 6, 2002 Q < November 4, 2002 Q < mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < mg/l, AO February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < Page 20

24 TABLE C CHEMICAL RESULTS MAC or DISTRIBUTION DISTRIBUTION DISTRIBUTION END PROCESS WASTE TEST & SAMPLE DATE Frequency IMAC RAW WATER TREATED WATER LUNDY'S LANE TANK KENT RESERVOIR BEVAN HEIGHTS SUPERNATANT ARSENIC mg/l February 4, 2002 Q <0.002 <0.002 <0.002 April 2, 2002 Q <0.002 <0.002 <0.002 July 2, 2002 A <0.002 <0.002 BARIUM 1.0 mg/l July 2, 2002 A BORON 5.0 mg/l July 2, 2002 A CADMIUM mg/l July 2, 2002 A < < CHROMIUM 0.05 mg/l July 2, 2002 A <0.003 <0.003 COPPER 1.0 mg/l, AO February 4, 2002 Q <0.064 <0.064 <0.064 April 2, 2002 Q <0.064 <0.064 <0.064 July 2, 2002 A <0.064 <0.064 IRON 0.3 mg/l, AO January 7, 2002 M <0.090 February 4, 2002 M/Q <0.090 <0.090 March 4, 2002 M <0.090 April 2, 2002 M/Q <0.090 <0.090 May 6, 2002 M <0.090 June 3, 2002 M <0.090 July 2, 2002 M/A <0.090 <0.090 August 6, 2002 M/Q <0.090 September 3, 2002 M <0.090 October 7, 2002 M <0.090 November 4, 2002 M/Q <0.090 December 2, 2002 M <0.090 LEAD 0.01 mg/l February 4, 2002 Q < < April 2, 2002 Q < < July 2, 2002 A < < < MANGANESE 0.05 mg/l, AO February 4, 2002 Q <0.003 <0.003 April 2, 2002 Q <0.003 <0.003 July 2, 2002 A <0.003 MERCURY mg/l July 2, 2002 A < < NITROGEN - NITRATE 10.0 mg/l January 7, 2002 M February 4, 2002 M/Q March 4, 2002 M April 2, 2002 M/Q May 6, 2002 M June 3, 2002 M July 2, 2002 M/A August 6, 2002 M/Q September 3, 2002 M October 7, 2002 M November 4, 2002 M/Q December 2, 2002 M NITROGEN - NITRITE 1.0 mg/l January 7, 2002 M <0.011 February 4, 2002 M/Q <0.011 <0.011 <0.011 March 4, 2002 M <0.011 April 2, 2002 M/Q <0.011 <0.011 May 6, 2002 M <0.011 June 3, 2002 M <0.011 July 2, 2002 M/A <0.011 <0.011 August 6, 2002 M/Q <0.011 <0.011 September 3, 2002 M <0.011 October 7, 2002 M <0.011 November 4, 2002 M/Q <0.011 <0.011 December 2, 2002 M <0.011 SELENIUM 0.01 mg/l July 2, 2002 A <0.003 <0.003 URANIUM July 2, 2002 A Page 21

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26 TABLE D CHEMICAL RESULTS MAC or DISTRIBUTION DISTRIBUTION DISTRIBUTION END PROCESS WASTE TEST & SAMPLE DATE Frequency IMAC RAW WATER TREATED WATER LUNDY'S LANE TANK KENT RESERVOIR BEVAN HEIGHTS SUPERNATANT 2346-TETRACHLOROPHENOL 0.10 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < D (DICHLOROPHENOXY ACETIC ACID) 0.1 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < DICHLOROPHENOL 0.9 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < T (TRICHLOROPHENOXY ACETIC ACID) 0.28 mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < TRICHLOROPHENOL mg/l February 4, 2002 Q < April 6, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < ALACHLOR mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < ALDICARB mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < ALDRIN + DIEDRIN mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < ATRAZINE AZINPHOS-METHYL (Guthion) BENDIOCARB February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < mg/l February 4, 2002 Q < April 2, 2002 Q < July 2, 2002 Q/A < < August 6, 2002 Q < < November 4, 2002 Q < < Page 22