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Home My WebLink AboutNC0028916_Inspection_20120830AVA NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Charles Wakild, P. E. Dee Freeman Governor Director Secretary August 30, 2012 Greg Zephir, Town Manager Town of Troy 315 North Main Street Troy North Carolina 27371 Subject: Compliance Evaluation Inspection Town of Troy Wastewater Treatment Facility NPDES Permit No. NC0028916 Montgomery County Dear Mr. Zephir: Enclosed please find a copy of the Compliance Evaluation Inspection Report for the inspection conducted August 22, 2012. The Town was found to be in compliance with NPDES Permit No. NC0028916 but there are several items noted below the Town is asked to address. During the inspection a brief data validation check (check) was performed. In this case data validation consisted of a comparison of random Discharge Monitoring Reports (DMR) and data provided by the Town's commercial laboratory. The findings of the check is as follows: • October 2011 DMR Lead value reported was 6.0 ug/1. The correct value should be 0.6 ug/1 Selenium value reported was <0.2 ug/1. The correct value should be <2.0 ug/1 • October 2010 DMR Zinc value reported was 12 ug/1. Correct value should be 120 ug/1 Based on the findings of the check the Town is asked to perform a complete data validation check for all data reported to the Division of Water Quality for the period 01/01/2010 through 12/31/2011 and report the findings to the Fayetteville Regional Office on or before September 28, 2012. Also, the Town is asked to submit amended DMRs based on the findings of the inspection and the complete data validation check also by September 28, 2012. Location: 225 Green Street, Suite 714, Fayetteville, North Carolina 28301-5043 Phone: 910-433-33001 FAX: 910-486-0707 \ Customer Service: 1-877-623-6748 Internet: www.ncwaterquality.orq An Equal Opportunity IAffiirmative Action Employer NorthCarolina Naturally Mr. Zephir August 30, 2012 Page 2 of 2 Please be reminded that accurate data reporting is vital to determining compliance and the protection of surface waters. Also it was noted during the inspection the old line leading to/from the old small lagoon (currently being filled) was believed to be a source of significant inflow. The inflow observed is believed to be drainage from the old lagoon as there may be no other way for water to escape the old structure. It is suggested that the Town investigate this inflow and determine the best course of action to address the perceived problem. Further, Mr. Shields indicated that the Town may be in the process of purchasing a centrifuge to manage solids/sludge at the wastewater facility. Be advised that an Authorization -to -Construct (ATC) is required before the unit can be added to the facility. It is suggested that you contact Mr. Seth Robertson with the Division of Water Quality Infrastructure Finance Section at (919) 707-9160 to discuss the ATC process as soon as possible. In closing I would like to thank Mr. Joe Shields, ORC for his time and cooperation during the inspection. Please refer to the enclosed inspection report for additional observations and comments pertaining to the inspection. If you or your staff has questions pertaining to the report please do not hesitate to contact me at (910) 433-3300. Sincerely, Paul E. Rawls Environmental Program Consultant PER/per Enclosure: Inspection Report cc: Joe Shields, ORC, Town of Troy Wastewater Treatment Facility Benny Dennis, Public Utility Director, Town of Troy FRO -Files (Mark;Brantley) United States Environmental Protection Agency EPA ^ Washington, D.C. 20460 Water Compliance Inspection Report Form Approved. OMB No. 2040-0057 Approval expires 8-31-98 Section A: National Data System Coding (i.e., PCS) Transaction Code NPDES yr/mo/day Inspection 1 I N I 2 15 I 31 NC0028916 111 121 12/08/22 • 117 Type Inspector FacType 18I C I 19I s I 20I I I I I I I I I I I I I I I I I 166 Remarks 211 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1, I I I I I I I I I Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA -- --Reserved----------- 67I 169 70 �I 711 I 72I N I 731174 751 1 1 1 1 1 1 180 1 Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Troy WWTP 650 Glen Rd Troy NC 27371 Entry Time/Date 08:50 AM 12/08/22 Permit Effective Date 10/01/01 Exit Time/Date 12:30 PM 12/08/22 Permit Expiration Date 14/06/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Joseph Edward Shields/ORC/910-572-3661/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Benny Ray Davis,444 N Main St Troy NC 27371//910-572-7841/9105723663 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenance Records/Reports . Self -Monitoring Program Sludge Handling Disposal • Facility Site Review Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) (See attachment summary) • Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date Division of Water Quality//9�9-7-33-z97637 W_ 3c - 261 910 4 33 3300 Paul E Ra s Signature of Management Q A Reviewer Belinda S Henson ? /�y�l Agency/Office/Phone and Fax Numbers Date o — [ ' FRO WQ//910-433-3300 Ext.726/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page # 1 NPDES yr/mo/day Inspection Type 3I NC0028916 111 121 12/08/22 117 181 Cl 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page # 2 Permit: NC0028916 Owner - Facility: Troy WWTP Inspection Date: 08/22/2012 Inspection Type: Compliance Evaluation. Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? ■ n n n Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■ • n n n Judge, and other that are applicable? Comment: MLSS operational target is reportedly 3300 - 3800 mg/I Settleometer is also used. Permit (If the present permit expires in 6 months or less). Has the permittee submitted a new application? Is the facility as described in the permit? # Are there any special conditions for the permit? Is access to the plant site restricted to the general public? Is the inspector granted access to all areas for inspection? Comment: The wastewater treatment facility was very neat and well kept. Bar Screens Type of bar screen a.Manual b.Mechanical Are the bars adequately screening debris? Is the screen free of excessive debris? Is disposal of screening in compliance? Is the unit in good condition? Comment: Grit Removal Type of grit removal a.Manual b.Mechanical Is the grit free of excessive organic matter? Is the grit free of excessive odor? # Is disposal of grit in compliance? Comment: Please make sure drain from grit disposal container is routed into,the WWTF. Equalization Basins Yes No NA NE n n■n ■ nnn n n■n ■ nnn ■ nnn Yes No NA NE n ■ ■ nnn ■ nnn ■ nnn ■ nnn Yes No NA NE n ■ ■ n n n ■ nrin ■ nnn Yes No NA NE Page # 3 Permit: NC0028916 Owner - Facility: Troy WWTP Inspection Date: 08/22/2012 Inspection Type: Compliance Evaluation Equalization Basins Is the basin aerated? Is the basin free of bypass lines or structures to the natural environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin size/volume adequate? Comment: EQ basin is a 10 acre lagoon that was previously used as a treatment lagoon. Secondary Clarifier Is the clarifier free of black and odorous wastewater? Is the site free of excessive buildup of solids in center well of circular clarifier? Are weirs level? Is the site free of weir blockage? Is the site free of evidence of short-circuiting? Is scum removal adequate? Is the site free of excessive floating sludge? Is the drive unit operational? Is the return rate acceptable (low turbulence)? Is the overflow clear of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately'/< of the sidewall depth) Comment: Clarifier #1, sludge depth = +/- 2' 2" Clarifier #2, sludge depth = +/- 3' 0" #2 Clarifier drive was being repaired at the time of the insepection Oxidation Ditches Are the aerators operational? Are the aerators free of excessive solids build up? Yes No NA NE n n■n ■ nnn ■ nnn ■ nnn ■ nnn n n■n n n■n ■ nnn Yes No NA NE ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn Yes No NA NE ■ nnn ■ nnn Page # 4 Permit: NC0028916 Owner - Facility: Troy WWTP Inspection Date: 08/22/2012 Inspection Type: Compliance Evaluation Oxidation Ditches # Is the foam the proper color for the treatment process? Does the foam cover less than 25% of the basin's surface? Is the DO level acceptable? Are settleometer results acceptable (> 30 minutes)? Is the DO level acceptable?(1.0 to 3.0 mg/I) Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) Comment: Mr. Shields indicated that D.O. in ditch #1 is managed at or about <1 mg/I, ditch #2 +/- 5 mg/I Disinfection - UV Are extra UV bulbs available on site? Are UV bulbs clean? Is UV intensity adequate? , Is transmittance at or above designed level? Is there a backup system on site? Is effluent clear and free of solids? Comment: Standby Power Is automatically activated standby power available? Is the generator tested by interrupting primary power source? Is the generator tested under load? Was generator tested & operational during the inspection? Do the generator(s) have adequate capacity to operate the entire wastewater site? Is there an emergency agreement with a fuel vendor for extended run on back-up power? Is the generator fuel level monitored? Comment: Generator is tested every other month. Pumps -IRS -WAS Are pumps in place? Are pumps operational? Are there adequate spare parts and supplies on site? Comment: Both pumps were tested and appeared to be functional. Yes No. NA NE ■ nnn ■ nnn ■ rinn n nn■ ■ nnn n nn■ Yes No NA NE ■ nnn ▪ nnn ■ nnn n nn■ n nn■ ■ nnn Yes No NA NE n n■n ■ nnn ■ nnn n n■n ■ nnn n n■n ■ nnn Yes No NA NE ■nnn ■ nnn n n■n Page # 5 Permit: NC0028916 Owner - Facility: Troy WWTP Inspection Date: 08/22/2012 Inspection Type: Compliance Evaluation Influent Sampling # Is composite sampling flow proportional? Is sample collected above side streams? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is sampling performed according to the permit? Comment: Influent sampler temp was 1 c at time of the inspection Unit was clean Effluent Sampling Is composite sampling flow proportional? Is sample collected below all treatment units? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type representative)? Comment: Effluent sampler temp was 0 c at time of the inspection Unit was clean Aerobic Digester Is the capacity adequate? Is the mixing adequate? Is the site free of excessive foaming in the tank? # Is the odor acceptable? # Is tankage available for properly waste sludge? Comment: Town is considering purchasing a centrifuge to manage sludge. Please be reminded that an Authorization -to -Construct is required to add this unit. Drying Beds Is there adequate drying bed space? Is the sludge distribution on drying beds appropriate? Are the drying beds freeof vegetation? # Is the site free of dry sludge remaining in beds? Yes No NA NE ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn Yes No NA NE ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn Yes No NA NE ■ nnn ■ nnn ■ nnn ■ nnn ■ nnn Yes No NA NE n n■n n n■n n n■n n n■n Page # 6 Permit: NC0028916 Owner - Facility: Troy WWTP Inspection Date: 08/22/2012 Inspection Type: Compliance Evaluation Drying Beds Is the site free of stockpiled sludge? Is the filtrate from sludge drying beds returned to the front of the plant? # Is the sludge disposed of through county landfill? # Is the sludge land applied? (Vacuum filters) Is polymer mixing adequate? Comment: The facility is equipped with sludge drying beds but is no longer used to service the WWTF. The Town allows a local septage hauler to use the beds in turn for servicing the Town's lift stations and treatment units. Solids from the beds are taken to local landfill. Flow Measurement - Effluent # Is flow meter used for reporting? Is flow meter calibrated annually? Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Comment: Flow meter is calibrated my municipal staff. Yes No NA NE nn■n ■ nnn ■ nnn 00•0 nn■n Yes No NA NE ■ nnn ■ nnn ■ nnn nnn■ Page # 7