TOWN OF BLOWING ROCK, NORTH CAROLINA

2006 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 2005.  It is required under the provisions of the Clean Water Act of 1999, House Bill 1160 ratified on July 20, 1999.

 

COLLECTION SYSTEM

 

I.                  General Information

 

Facility Name:              Town of Blowing Rock

            Responsible Entity:        Town of Blowing Rock

            Person in Charge:         Johnny K. Lentz, Collection System ORC

            Applicable Permits:       WQCS00142

 

II.               System Description

 

The collection system consists of approximately 15.5 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. 

 

III.           Performance

 

Seven 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 date it occurred.

 

Location                                         Month                         Volume (gal)

         

            Country Club Lane at                           04/13/06                                  1,000

            Driving range

 

            Aerial line from Laurel Lane to              04/20/06                                  100

            to Old Stable Lane line                                                    

 

            Manhole parking lot at Blowing             05/05/06                                  2,500

            Rock swimming pool                                                                

 

            Manhole New River Lake Drive           05/30/06                                  3,000

            200 feet east of 321 Bypass                                                      

 

           

Manhole 200 feet south of                    06/02/06                                      750

            Sunset Drive on Ransom Street                                       

                                   

            Elevated manhole Cornish Road            06/02/06                                      750

            130 feet from 321 Business

           

            Manhole at bridge at entrance               08/20/06                                  6,000

            point to driving range

 

BLOWING ROCK WASTEWATER TREATMENT PLANT

 

I.                  General Information

 

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       

 

II.               System Description

 

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 chlorine 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.  

 

III.           Performance

 

Plant Capacity:  .800 MGD

            

Average Daily Flow for 2006

 

Month

Average Daily

Maximum Flow

Minimum Flow

January

.314

.605

.155

February

.237

.515

.157

March

.185

.285

.119

April

.220

.382

.151

May

.230

.462

.102

June

.326

.766

.105

July

.334

.453

.251

August

.280

.498

.097

September

.329

.512

.187

October

.300

.944

.161

November

.298

.608

.149

December

.334

.730

.158

 

The plant treated 103.16 MG of wastewater in 2006.  The plant was in violation in October due to excessive rainfall.  The flow exceeded .8 MGD on 1 day.  No other violations were reported in 2006.

 

2006 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

1 day (10/18/06)

Chronic Toxicity

Pass/Fail

0

Chlorine

28 ug/l

0

 

IV.              Notification

 

This report is available online at the website www.townofblowingrock.com for the Town of Blowing Rock.  In addition copies are available for review or pickup at the Town Hall Office at 1036 Main Street, Blowing Rock, NC.

 

V.                 Certification

 

            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

 

__________________________                                ________________

Johnny Lentz                                                                          Date

Collection System ORC