NC0024252_Toxicity Report_20150302

CITY OF CONOVER PUBLIC WORKS DEPARTMENT
P.O. BOX 549 Phone [phone]
CONOVER, NC 28613-0549
February 25, 2015
Mr.Charles Weaver, Jr. RECEIVED/DENR/CWp
NCNR/Water Quality
NPDES Unit MAR 02 2015
1617 Mail Service Center water
ke
Raleigh, NC 27699-1617 Permittfn9S Iecor
Dear Mr. Weaver:
Enclosed is the 4th second source toxicity report for the City of
Conover' s Northeast Wastewater Treatment Plant (NEWWTP) permit
number NC0024252 permit renewal. We had included the other 3
second source toxicity reports with our original permit renewal
application.
If you have questions comments, or need further information
please call me at (828) 465-2279.
Sincerely,
.4
ichael Fox
Wastewater Treatment and Collection Supervisor

Effluent Toxicity Report Form-Chronic Fathead Minnow Multi-Concentration Test Date:1/23/2015
FIMlity: CONOVER NCO') 24252 Pipe#: 001 County: CATAWBA
Laboratory: Research&An 'cal LabaraMesComments I Final Effluent
Signatu O rotor' • po le Charge
x �l/
Sig re Laboratory upervisor
MAIL ORIGINAL TO: Environmental Sciences Branch
Division of Water Quality
NC DENR
1621 Mail Service Center
Raleigh,NC 27699-1621
Test Initiation Date/Time 01/14/15 / 1430pm Avg Wt/Surv.Control 0.8010 Test Organisms
%Eff. Repi. 2 3 4 t' Cultured In-House
Control Surviving# 15 15 15 15 %Survival' 100.0 I Outside Supplier
Original# 15 15 15 15
Wt/original(mg) 0.6833 0.9407 0.8800 0.7000 Avg Wt(mg) 0.8010 Hatch Date: 1/12/2015
16 Surviving# 15 15 15 15 %Survival 100.0 Hatch Time: after1600
Original# 15 15 15 15
Wt/original(mg) 0.8907 0.7613 0.9053 1.0133 Avg Wt(mg) 0.892/
241 Surviving# 15 15 15 15 %Survival 100.0
Original# 15 15 15 15
Wt/original(mg) 0.6933 1.1033 0.9860 0.8407 Avg Wt(mg) 0.9058
32 Surviving# 15 15 15 15 %Survival' 100.0 I
Original# 15 15 15 15
Wt/original(mg) 0.7127 0.628/ 1.0407 0.9380 Avg Wt(mg) 0.8950
mil Surviving# 15 15 15 15 %Survival 100.0
Original# 15 15 15 15
Wt/original(mg) 0.9800 0.904! 1.0127 0.9120 Avg Wt(mg) 0.9524
Emu Surviving# 15 15 15 15 %Survival 100.0
Original#
Wt/original(mg) 0.8493 0.7753 1.1113 0.8667 Avg Wt(mg) 0.9007
water Quality Data Day
Control 1 2 3 4 5 5
pH(SU)!nit/Fin 6.99 7.02 7.00 / MO 6.98 / 6.99 6.98 / 7.04 6.95 / 7.08 7.00 I 7.08 6.96 / 7.10
DO(mg/L) 'nit/Fin 8.4 / 8.4 8.5 / 8.4 8.5 / 8.3 8.5 I 8.1 8.5 / 7.9 8.5 I 7.7 8.5 / 7.6
Temp(C)!nit/Fin •. • ••
His Concentration 1 2 3 4 5 5
pH(SU)Init/Fin :I . :: • •I .. • ..:1v ..:;: ..:. .,:r.
DO(mg/L) Init/Fin 8.4 I 8.4 8.5 1 8.4 8.5 / 8.3 8.5 / 8.1 8.5 / 1.9 8.5 / 7.7 8.5 I 7.6
Temp(C)Init/Fin .
Sample 2 3 Survival Growth Overall Result
Collection Start Date 01/12/15 01/15/15 01/18/15 Normal l-I ChV I>64% I
Grab Horn.Var. r I _
Composite(Duration) 24 HRS 24 HRS 24 HRS NOEC 64% 64%
Hardness(mg/L) 43 44 42 LOEC 64% 64%
Alkalinity(mg/L) 42 39 36 ChV >64% >64%
Conductivity(umhos/cm) 345 323 340 Method Steel's Dunnett's
Chiorine(mgJL) 0.04 0.04 0.03
Temp.at Receipt(i C) 3.1 1.9 2.0 Stats Survival Growth
Conc. Critical Calculated Critical Calculated
Dilution H2O 16 10 22.00 2.41 -1.019
Hardness(mg/L) 48 24 10 21.00 2.41 -1.1655
Alkalinity(mg/L) 38 32 10 21.00 2.41 -1.0454
Conductivity(umhos/cm) 190 48 10 24.00 2.41 -1.6827
64 10 20.00 2.41 -1.1079
DWQ Form AT-5(1/04)