NC0039594_NOD2015PC0304_20151218 (4)

Permit: NC0039594 Owner-Facility: Maiden WWTP
Inspection Date: 12/16x2015 Inspection Type: Compliance Evaluation
Grit Removal Yes No NA NE
b.Mechanical 0
Is the grit free of excessive organic matter? M ❑ ❑ ❑
Is the grit free of excessive odor? 0 ❑ ❑ ❑
#Is disposal of grit in compliance? 0 ❑ ❑ ❑
Comment:
Bar Screens Yes No NA NE
Type of bar screen
a.Manual ❑
b.Mechanical
Are the bars adequately screening debris? ❑ ❑ ❑
Is the screen free of excessive debris? N ❑ ❑ ❑
Is disposal of screening in compliance? 0 ❑ ❑ ❑
Is the unit in good condition? N ❑ ❑ ❑
Comment: Screenings and grit are disposed at the County Landfill by a contracted company (Republic
Services).
Flow Measurement- Influent Yes No NA NE
#Is flow meter used for reporting? 0 ❑ ❑ ❑
Is flow meter calibrated annually? 0 ❑ ❑ ❑
Is the flow meter operational? 0 ❑ ❑ ❑
(If units are separated) Does the chart recorder match the flow meter? ❑ ❑ N ❑
Comment: The flow meter is calibrated annually and was last calibrated on 11/18/15 by Clearwater, Inc.
Sequencing Batch Reactors Yes No NA NE
Type of operation:
Is the reactor effluent free of solids? ❑ ❑ ❑ E
Does minimum fill time correspond to the peak hour flow rate of the facility? ❑ ❑ 0 ❑
Is aeration and mixing cycled on and off during fill? 0 ❑ ❑ ❑
The operator understands and can explain the process? 0 ❑ ❑ ❑
Comment. Both SBR units were operational and in service. The SBRs are equipped with surface
aeration.
Equalization Basins Yes No NA NE
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Permit: NCO039594 Owner-Facility: Maiden VWdTP
Inspection Date: 12/16/2015 Inspection Type: Compliance Evaluation
Equalization Basins Yes No NA NE
Is the basin aerated? 0 ❑ ❑ ❑
Is the basin free of bypass lines or structures to the natural environment? 0 ❑ ❑ ❑
Is the basin free of excessive grease? E ❑ ❑ ❑
Are all pumps present? ❑ ❑ 0 ❑
Are all pumps operable? ❑ ❑ N ❑
Are float controls operable? ❑ ❑ N ❑
Are audible and visual alarms operable? ❑ ❑ N ❑
#Is basin size/volume adequate? N ❑ ❑ ❑
Comment: The SBR effluents are conveyed to an aerated equalization basin prior to chlorination.
Disinfection-Liquid Yes No NA NE
Is there adequate reserve supply of disinfectant? M ❑ ❑ ❑
(Sodium Hypochlorite)Is pump feed system operational? 0 ❑ ❑ ❑
Is bulk storage tank containment area adequate?(free of leaks/open drains) 0 ❑ ❑ ❑
Is the level of chlorine residual acceptable? N ❑ ❑ ❑
Is the contact chamber free of growth, or sludge buildup? 0 ❑ ❑ ❑
Is there chlorine residual prior to de-chlorination? 0 ❑ ❑ ❑
Comment:
De-chlorination Yes No NA NE
Type of system ? Liquid
Is the feed ratio proportional to chlorine amount(1 to 1)? ❑ ❑ N ❑
Is storage appropriate for cylinders? ❑ ❑ N ❑
#Is de-chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑
Are the tablets the proper size and type? ❑ ❑ 0 ❑
Comment. Aqueous sodium bisulfite is used for dechlorination. The facility is equipped with an ORP
system to assist the wastewater staff in the operation of the chlorination/dechlorination
systems.
Are tablet de-chlorinators operational? ❑ ❑ 0 ❑
Number of tubes in use?
Comment:
Flow Measurement- Effluent Yes No NA NE
#Is flow meter used for reporting? ❑ 0 ❑ 0
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