TOWN OF BLOWING ROCK, NORTH CAROLINA
2004 SYSTEM PERFORMANCE ANNUAL REPORT
Collection System and Wastewater Treatment Plant
This report provides performance information on the Town of Blowing Rock sewer collection system and wastewater treatment plant in the year 2004. It is required under the provisions of the Clean Water Act of 1999, House Bill 1160 ratified on July 20, 1999.
COLLECTION SYSTEM
Facility Name: Town of Blowing Rock
Responsible Entity: Town of Blowing Rock
Person in Charge: Johnny K. Lentz, Public Works Director
Applicable Permits: WQCS00142
The collection system consists of approximately 14.2 miles of gravity sewer lines and 2.5 miles of pressure sewer. There are three lift-stations; Mayview, Chetola, and Chestnut Hill which are checked daily.
Two spills that reached surface waters occurred in the collection system during the year. In accordance with State regulations, all were reported to the State of North Carolina, Department of Environment and Natural Resources. The table below gives the spill volume and the month it occurred.
Location
Month Volume (gal)Intersection of Ransom Street
And Sunset Drive 09/07/2004 7000
Intersection of Ransom Street
And Sunset Drive 09/17/2004 6000
BLOWING ROCK WASTEWATER TREATMENT PLANT
Facility Name: Town of Blowing Rock Wastewater Treatment Plant
Responsible Entity: Town of Blowing Rock
Person in Charge: Thomas McRary, Wastewater Treatment Plant Manager
Applicable Permits: NPDES Permit No: NC0027286
Wastewater is physically screened through two sets of bar racks and then enters the equilization basin. It is then pumped by three influent pumps to four aeration basins where diffused air is added by five blowers. It then enters two clarifiers where a part of the sludge is returned to the head of the plant. The clear water on top of the clarifiers then enters the chlorine contact chamber where chlorine is fed to kill the bacteria. De-chlorine chemical is then added to take the clorine out of the water before entering the river.
Solids are wasted to the digester daily. Honeywell Septic Tank Service hauls sludge to Lenoir WWTP for disposal.
Plant Capacity: .800 MGD
Average Daily Flow for 2004
|
Month |
Average Daily |
Maximum Flow |
Minimum Flow |
|
January |
.197 |
.333 |
.125 |
|
February |
.242 |
.579 |
.138 |
|
March |
.177 |
.277 |
.108 |
|
April |
.192 |
.388 |
.119 |
|
May |
.195 |
.371 |
.123 |
|
June |
.312 |
.798 |
.162 |
|
July |
.289 |
.389 |
.209 |
|
August |
.278 |
.617 |
.161 |
|
September |
.665 |
1.572 |
.172 |
|
October |
.357 |
.632 |
.242 |
|
November |
.342 |
.721 |
.171 |
|
December |
.329 |
.583 |
.212 |
The plant treated 108.6 MG of wastewater in 2004. The plant was in violation in September due to excessive rainfall which was greater than 24 inches. The flow exceeded .8 MGD on 8 days. No other violations were reported in 2004.
Overflow was reported to the state from Mayview Lift Station during September also due to excessive rainfall.
2004 Results For Permit NPDES Parameters
|
Parameter |
Limit |
Violations |
|
PH |
6-9 Units |
0 |
|
BOD |
30-45 ppm |
0 |
|
Total Suspended Solids |
30-45 ppm |
0 |
|
Ammonia Nitrogen |
No Limit |
0 |
|
Dissolved Oxygen |
>5.0 ppm |
0 |
|
Fecal Coliform |
200-400 ppm |
0 |
|
Conductivity |
No Limit |
0 |
|
Flow |
.8 MGD |
8 days (September) |
|
Chronic Toxicity |
Pass/Fail |
0 |
|
Chlorine |
28 ug/l |
0 |
This report is available online at the website www.townofblowingrock.com for the Town of Blowing Rock. In addition copies are available for review at the
Town Hall office at 1036 Main Street, Blowing Rock, NC.
I certify under penalty of law that this report is complete and accurate to the best of my knowledge. I further certify that this report has been made available to the users or customers of the named system and that those users have been notified of its availability.
__________________________ ________________
Thomas McRary Date
Water and Wastewater Treatment Plant Manager