NC0037508_Compliance Biomonitoring_20000710

NORTH DAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL, RESOURCES
July 10, 2000
Dennis Brobst
Moore County Public Works Director
P. O. Box 1927
Carthage, NC 28327
DIVISION OF WATER QUALITY
FAYETTEVILLE REGIONAL OFFICE
Subject: COMPLIANCE BIOMONITORING RESULTS AND
COMPLIANCE SAMPLING RESULTS
Moore County Water Pollution Control Plant
NPDES Permit No. NC0037508
Moore County
Dear Mr. Brobst:
The following are the results of the laboratory and aquatic toxicity (AT)
biomonitoring testing that was collected during the week of April 3, 2000. Please
refer to my April 25, 2000 letter that was sent to you (COMPLIANCE
BIOMONITORING INSPECTION). Samples were taken at the WWTP outfall for
the following parameters, which are currently in your NPDES Permit: cyanide,
phosphorus, ammonia as nitrogen, nitrate as N, nitrite as N, TKN as N, zinc, copper,
silver, total suspended solids, and five day biochemical oxygen demand. The results
of these parameters are as follows: cyanide = 0.02 mg/L, phosphorus = 3.1 mg/L,
ammonia as nitrogen = 0.04 mg/L, nitrate plus nitrite as N = 17 mg/L, TKN as N =
1.1 mg/L, zinc = 21 ug/L, copper = 9.8 ug/L, silver = <5.0 ug/L, total suspended
solids = 15 mg/L, and five day biochemical oxygen demand = 8.0 mg/L. The results
of the whole effluent toxicity test was a "Pass" with the chronic Ceriodaphnia dubia
pass/fail toxicity test at sample test concentration of 41 %.
You and your staff are commended for your continued efforts to comply
with the NPDES permit.
If you have any questions or comments concerning this report or require
clarification on part(s) of this report, please feel free to contact me at 910/486-1541,
ext. 340.
/dl
—�S\ cerely,
Dale Lopez
Environmental Specialist II
225 GREEN STREET, SUITE 714 / SYSTEL BLD. FAYETTEVILLE, NORTH CAROLINA 28301-5043
PHONE [phone] FAX [phone]
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