NC0023876_Toxicity Test Results_20200908

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ROY COOPER
Governor
MICHAEL S.REGAN 0Secretary
S.DANIEL SMITH NORTH CARouNA
Director Environmental Quality
September 8, 2020
Mr. Robert C. Patterson, Jr., PE
Director of Water Resources
City of Burlington
P.O. Box 1358
Burlington,NC 27216-1358
Subject: Toxicity Test Results
South Burlington POTW
NPDES Permit No.NCO023876
Alamance County
Dear Mr. Patterson:
Please find attached a copy of the toxicity test results for samples obtained from the South Burlington
effluent. Aliquots from the South Burlington composite sample were collected on August 11 and
13,2020 by Mike Mickey and Jordan Burbage of this office for use in a chronic Ceriodaphnia dubia
pass/fail toxicity test conducted by the Division's Aquatic Toxicology Branch laboratory. The South
Burlington POTW effluent passed this test at the permitted effluent concentration of 86%. The test
treatment survival rate was 100%.
Should you have any questions concerning this report,please do not hesitate to contact Mike Mickey
at(336)776-9692. Our office appreciates the assistance of the W WTP staff in collecting the samples.
Sincerely,
Lon T. nider, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources,NCDEQ
Enclosure: Toxicity Test Results
cc: Rick Asher ([e-mail])
WSRO
North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Office 1450 West Hanes Mill Road,Suite 300 I Winston-Salem,North Carolina 27105
NORM GROLINA
oeo.nl•m^iu^+mm•^ww•I\ � 336.776.9800

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Division of W,aF ResQWYces
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Tel; Lon Snider
Water.Quality Regional operations,WSRo
IT
hrouh: Cindy A.Moore ^-
. Superuisor AquaticToiilcologyBranch(ATr1)
Frain LoritnarS.tfierining
Environmental Specialist il;Aggat`oTo#icol# $rskh(AT6)
Subject: Whofe effluent toxicitjctest results
Burlington South WWTP
NPDES Permit#14002$876/001
AlafnwiCe bounty
T'p,<aquatictoatitit)rtestusingflow proportionalarmposfte°:samplespfeffiperftlt char. edfrom
the t ur(ington Sogx4t WWTP:has been completed. BWrtirigtoh'Spu#ii W.W P haS a permitted
effluentdischarge of a 2.Q million gafions per day(MGIT),g{rteririg BiR Alamanee Creek 1740 pf
3,1F cFS); tNhple effluent samples were coltectedn;pugpst 11-arirt August 13 by Mike Mickey
and ftiitti representative Elizabeth Whitfield for tine lnd¢hronfc CerioddphrtiardWiiio pass-:fait
tpxttity test: The rest passed. Toxicity test information fotlouys
Test Type B-Brood Ceriodopi giir ttulaio;chrr nit pass'-fair
Test'Result Pass
Test Goncentratians- 86%
tontrot5 arvluat 100%
Control Mean Reproduction 22.0;nepne
Test Treat6errt Survival 100516
Tt'eatnent Mean Reproduction 22.67 nepnates
FirstSample pH 7t28 Su
First Sample Conductivity, 439 micromhb$Am
First Sample TotalResidual Chlorine <0.1 mg/L
Secortd.Sample pH 7 p9 Su
Second Sample Conductivity $79 microm(hoVcrfr
Second Sample Total Rpildual Chlorine <O11 mg/t: ;
Test resultsfor°the above samples indicate that theeffiaent would notbe predicted to have
rhvatenquality impacts. Please contact us)f you have4any`questfons or If further efftupnttoxicity
monitoring is desired' We maybe reached at(qjq)743,4401. j
Pawn: Gape Fear
Cca Mike Mickey(WSRO)