Loading...
Airport Water Compliance Inspection Report r~\H'/fI': . )$' ~ ~ Fiel~s of Opportunities /J~' ~/ A , .' // . /--- /n/p STATE OF IO'NA THOMAS J. VI LSACK, GOVERNOR SALLYJ. PEDERSON, LT. GOVERNOR DEPARTMENT OF NATURAL RESOURCES JEFFREY R. VONK, DIRECTOR CERTIFIED MAIL C) t" '"7~ r-' ~ . . , February 28, 2005 . , . City of Dubuque 50 W 13th St. Dubuque, IA 52001 (i' Attention: Honorable Mayor and Council RE: Water Compliance Inspection - Dubuque Regional Airport Notice of Violation 567 lAC 43.2(2) Operating permit requirements System No. IA3126013 We have enclosed the inspection report prepared by Chad Kehrli of our Field Office Staff. All requirements are to be completed as specified in the report. We encourage you to consider the recommendations. If you have about the report, please contact Chad Kehrli or myself at this Field Office. Sincerely, ENVIRONMENTAL PROTECTION DIVISION /r/~tk)~ Mike Wade Environmental Specialist c: File - WS/Dubuque County/Dubuque Airport Water Supply Section - DNR - Des Moines Environmental Lab, 795 Julien Dubuque Drive, Dubuque, IA 52001 Todd Dalsing, Dubuque Regional Airport, 11000 Airport Road, Dubuque, IA 52001 Efile - 31 WS Dubuque 3126013 Dubuque Airport 020805 cov cek Field Office 1, 909 West Main Suite 4, Manchester, IA 52057 563/927-2640 FAX 563/927-2075 Field Office 1, 909 West Main Suite 4, Manchester, IA 52057 563/927 -2640 FAX 563/927-2075 IOWA DEPARTMENT OF NATURAL RESOURCES WATER SUPPLY SANITARY SURVEY ., ~" PLANT GRADE: A Pa e 1 of 5 SERVICE TYPE: NTNC CITY: Dubuque STATE: Iowa ZIP: 52001 PHONE: 563/589-4128 SURVEY DATE THIS SURVEY: 02108/2005 DATE LAST SURVEY: 11/08/1999 PURPOSE: General Com CERTIFICATION #: RESPONSIBLE OPERATOR NAME: Mark Smith GRADE: PERSONS NAME: TITLE: INTERVIEWED Todd Dalsing Airport Operations & Maintenance Supervisor Mark Smith Operator CONSUMPTION Average GPD: 3,500 est. Maximum GPD: 5,000 est. POPULATION: 420 PE @ 100 GPCD ASSESSMENTS VULNERABILITY: D On File [8] U date Attached INFLUENCED GROUNDWATER: D On File [8] U date Attached AUTHENTI- INS;~T~: ~~a9 Kehrli CATION l t......t/ / e/I..A DATE ..:; jJd'-j" 5 DATE iY1 J...J..f-or- Were deficiencies noted or significant observations made during this inspection? Yes - See Comments Section, No - no deficiencies noted, Blank - not applicable or observed Yes No Item Yes No Item 1. SOURCE 6. DISTRIBUTION SYSTEM ~ 0 a. Location & Vulnerability Assessment ~ 0 a. Sanitation & Construction ~ 0 b. Sanitation & Construction 0 ~ b. Operation & Maintenance 0 ~ c. Operation & Maintenance 0 ~ c. Flow Capacity & System Pressure 0 ~ d. Capacity 0 0 d. Asbestos Piping ~ 0 e. SWTR/SW, GW, IGW Assessment 7. BACTERIOLOGICAL MONITORING 2. TREATMENT ~ 0 a. Sampling Plan Compliance 0 0 a. Location ~ 0 b. Bacterial Quality ~ 0 b. Sanitation & Construction ~ 0 c. Disinfectant Residual ~ 0 c. Operation & Maintenance 0 ~ d. Sanitary Hazard 0 0 d. Capacity 8. CHEMICAL QUALITY 3. PLANT STORAGE 0 ~ a. Raw Water Sources 0 0 a. Location 0 ~ b. Finished Water 0 0 b. Sanitation & Construction 9. OPERATION 0 0 c. Operation & Maintenance 0 ~ a. Test Equipment 0 0 d. Capacity ~ 0 b. Operation Reports 4. DISTRIBUTION STORAGE 10. STAFFING & OPERATOR CERTIFICATION 0 ~ a. Location ~ 0 a. Operator, Direct Responsibility 0 ~ b. Sanitation & Construction 0 0 b. Shift Operators 0 ~ c. Operation & Maintenance 0 0 c. General Staffing 0 ~ d. Capacity 11. MISCELLANEOUS 5. PUMPING STATION 0 ~ a. Permits 0 0 a. Location ~ 0 b. Source/Entry Point 0 0 b. Sanitation & Construction 0 0 c. Emergency Operation 0 0 c. Operation & Maintenance 0 0 d. Lead & Copper 0 0 d. Capacity 0 0 e. Previously Noted Deficiencies " - Water Supply Sanitary Survey Dubuque Regional Airport Page 2 of 5 SYSTEM DESCRIPTION Water for this nontransient public water supply is provided by two deep wells. Well #1, active well, was constructed in 1948 to a depth of 720 feet. This well was cased to a depth of 361 feet. Well #1 is equipped with a submersible pump capable of providing water at a rate of 100 GPM. A 3,000-gallon pressure tank provides pressure and storage for the distribution system. Water from this well is treated with liquid chlorine for disinfection. Well #2, emergency well, was constructed in 1996 to a depth of 800 feet and cased to a depth of 400 feet. Well #2 is equipped with a submersible pump capable of providing water at a rate of 150 GPM. A 1,500-gallon pressure tank can provide pressure and storage for this distribution system. Water from this source is not treated. Presently this well is only used to supply water for fire protection services at the airport. SYSTEM EVALUATION 1.a. Source (Location and Vulnerability Assessment) A public water supply is classified as "vulnerable" if one or more of the following conditions exist: . Synthetic organic compounds (SOCs) or volatile organic compounds (VOCs) that were detected by any previous monitoring will be classified "vulnerable" for a period of three years, excluding total trihalomethanes (TTHM) or other demonstrated disinfection by-products. . Public water supply wells that are within any of the following separation distances: Sources of contamination Shallow Wells DeeD wells Solid waste disposal site Lagoons Sanitary & industrial point discharges Mechanical waste treatment plants Underground chemical storage Above ground chemical storage 1,000 feet 1,000 feet 400 feet 400 feet 400 feet 200 feet 1,000 feet 400 feet 400 feet 200 feet 200 feet 100 feet An above ground storage tank containing diesel fuel for the airport's emergency generator is located within 100 feet of Well #1. Adequate measures have been taken to prevent significant spills from occurring at this site. This includes daily inspections of this site. All other separation distances for both well sites have been met or exceeded. With this information it has been determined that Wells #1 and #2 are not physically vulnerable to organic chemical contamination. 1.b. Source (Sanitation & Construction) This system is equipped with a flow meter and draw down equipment and they are located in the pump house of Well # 1. The flow meter measures in cubic feet. A small gap exists between the concrete platform and the well head. Most of the well head that interfaces with the concrete platform has been sealed with caulk, but at one location steal wool has been used to plug a gap. Mouse droppings in the well house are present in moderate amounts. This gap must be properly sealed to eliminate this sanitary hazard. A raw water tap exists and is located in the pump house of Well # 1 . Water Supply Sanitary Survey Dubuque Regional Airport Page 3 of 5 1.e. Source (Influenced Groundwater Determination) Available records indicate that these are deep wells. There is no information indicating that these wells do not meet this department's well construction and water quality criteria. Therefore, it is determined that these groundwater sources are not directly influenced by surface water. 2.b. Treatment (Sanitation & Construction) The plastic line from the day tank to the pump and the line from the chlorine bulk storage to the chlorine day tank are not properly sealed as they enter the day tank. These lines must be properly sealed where they enter the day tank. 2.c. Treatment (Operation & Maintenance) During this inspection I could not be determined whether the chlorine solution being used for disinfecting was NSF certified. Any drinking water system chemical, which is added to raw, partially treated, or finished water must be suitable for the intended use in a potable water system. Effective on October 1, 2000, the chemical must be certified to meet the current American National Standards Institute/National Sanitation Foundation (ANSI/NSF) Standard 60, per 567 lAC 42.4(3)"b". This system must immediately determine whether the chlorine solution is adequate, and if not, begin using an approved chlorine solution. A method to measure daily chlorine usage was not available at the time of this inspection. This system must obtain a method to measure chlorine usage by volume or weight immediately. The bulk storage container for the chlorine is a black 55-gallon drum. According to Mr. Smith, when the bulk storage tank is filled, it takes over one year to use all of the chlorine. It is recommended that this system only store an amount of bulk chlorine that can be used within a 2 to 3 month period. This is due to the fact that chlorine begins to break down over time and reduces its concentration. Consideration should be given to obtaining chlorine solution from the City of Dubuque Water Supply. 6.a. Distribution System (Sanitation & Construction) As a reminder, at bulk water loading stations, positive separation must be provided through the use of an air gap or a backflow preventer. This includes fire vehicles. Mr. Dalsing informed me that they have installed backflow preventers and hire someone to inspect them on an annual basis. 7.a. Bacterioloqical Monitorinq (Samplinq Plan) A current plan was not on site at the time of this visit. A plan must be developed and be reviewed or updated by the public water supply system every two years and must be revised by the system as directed by the department. 7.b. Bacterioloqical Monitorinq (Bacterial Quality) Records in this office indicate that all bacterial quality samples of this water supply's distribution system taken during the previous three years were analyzed to be bacterially "safe." 7.c. Bacterioloqical Monitorinq (Disinfectant Residual) On site MORs for the most recent month indicate that free chlorine is being measured by this system. On site testing at the SEP indicated that free chlorine was 0.42 mg/I and total chlorine was 0.76 mg/1. Samples taken at the end of the distribution system showed free chlorine of 0.26mg/l, and total chlorine 0.46 mg/1. This system must be able to identify whether free chlorine or combined chlorine is being used for disinfection. To verify whether free or combined chlorine is present a raw water sample must be collected from Well #1 and analyzed for ammonia. If ammonia is not present or the chlorine feed rate is ten times the concentration of ammonia, free chlorine will be the chlorine used for disinfection. A minimum of 0.3 mg/I of free or 1.5 mg/I of total chlorine must be maintained in the distribution system at all times. , ~ Water Supply Sanitary Survey Dubuque Regional Airport Page 4 of 5 9.b. Operation (Operation Reports) The following table is a summary of the self-monitoring requirements for the Dubuque Regional Airport Public Water Supply: PARAMETER LOCATION FREQUENCY Residual Chlorine Finished (SEP), Distribution. Svstem Dailv Flow Raw, Finished Daily Chlorine, Amount Used Dav Tank! Scale Daily Calculated MRDL Value Distribution System 1 / month Static and Pumping Water Levels Well # 1 1/month Previous Monthly Operation Reports (MORs) have been kept on site, according to Mark Smith. A review of this Department's records indicates that they have not been submitted to this Department in the past. Mr. Smith showed me the MOR that he was completing for the month of February. The information in this MOR indicates that chlorine testing at the SEP is being done daily. It also indicates that no chlorine testing is being done within the distribution system. In addition, the amount of chlorine used is not being reported, due to the absence of a method to measure usage (see item 2.c. above). In addition, flow and static and pumping water levels are not being reported. Failure to submit and monitor for the parameters listed above is a violation of 567 lAC 43.2(2). All parameters listed above must be measured, recorded and submitted to this office monthly. 10.a. Staffinq & Operator Certification (Operator. Direct Supervision) Each community public water supply is required to designate an operator in charge for the water treatment and water distribution segments of the water supply system. During this inspection it was unclear if a certified operator from the City of Dubuque has been assigned to this system. This system must obtain the services of an operator with a minimum of a Grade A certification by May 1, 2005. 11.b. S/EP Determination During this survey, it was determined that this supply has one active source entry point (S/EP) to the distribution system. S/EP #01 is described as TAP IN TANK ROOM,#1 and is representative of the finished water from Well #1. . . , . Water Supply Sanitary Survey Dubuque Regional Airport Page 4 of 5 SUMMARY Determinations: 1. Wells #1 and #2 are not physically yulnerable to organic chemical contamination. 2. These groundwater sources are not directly influenced by surface water. 3. This water supply has one actiye source entry point (S/EP). Requirements: 1. Obtain the appropriate permits prior to construction actiyities associated with the well, distribution system or treatment devices. 2. Continue to collect and submit all samples listed in the permit for this public water supply. 3. Deyelop and conduct bacteria sampling using an approyed sampling site plan. 4. Properly seal the gap at the well head. 5. Seal the day tank where the bulk storage tank and chlorine pump lines enter the lid. 6. Obtain a method to measure chlorine usage. 7. Complete and submit MORs to this Department on a monthly basis. MORs must include all information listed in section 9.b. of this report. 8. A determination must be made as to whether free or combined chlorine is being used to disinfect. Refer to section 7.c of this report. 9. Use only NSF certified chlorine. 10. Obtain a certified operator by May 1, 2005. Recommendations: 1. Reduce the amount of chlorine kept in bulk storage to a 2 or 3 month supply.