ML20137G249

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Results of Aquatic Toxicity Testing of LCS-1000 in Effluents Discharged to Marine Receiving Waters
ML20137G249
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 03/18/1997
From: Keser M
NORTHEAST UTILITIES SERVICE CO.
To:
Shared Package
ML20137G236 List:
References
NUDOCS 9704010361
Download: ML20137G249 (7)


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Results of Aquatic Toxicity Testing of LCS-1000 in Effluents Discharged to Marine Receiving Waters Prepared by:

Northeast Utilities Service Company Safety, Health & Environmental Services Aquatic Services NU Environmental Laboratory Approved by:

mA /b- y ,rm Dr. Milan Keser l

l March 1997 1

i 9704010361 970325 PDR ADOCK 05000245 P PDR _

, Results of Aquatic Toxicity Testing of LCS-1000 in Emuents Discharged to Marine Receiving Waters i

i The aquatic toxicity of LCS-1000, a corrosion inhibitor product developed by Calgon l Corporation, was examined at the NU Environmental Laboratory (NUEL). The LCS-1000 l

product is made up, by weight, of 7.5% sodium molybdate dihydrate,1% sodium tolytriazole, and 1.1% sodium bicarbonate in water (90.4%). Test methodology followed established CT DEP

- protocols for acute static without renewal testing (Table 1) for marine receiving waters. The test i

organisms were sheepshead minnow (Cyprinodon variegatus) and bay mysid (Mysidopsis bahia).

I I Testing was conducted from February 12,1997 through February 16,1997. l Test concentrations on the laboratory data sheets (Attachment) were expressed as LCS-1000 product concentration (Table 2). LCS-1000 ( as product) concentrations can be directly calculated from molydate by increasing the concentration by a factor of 20, because molybdate (moo 4) represents 66% of the formula weight of sodium molydate dihydrate, hence about 5% of

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i the product. Results indicated that LCS-1000 was more toxic to the bay mysid (LCso = 3876 mg/l) than the sheepshead minnow (LC3o = 12311 mg/l). Based on the results from the more 4

sensitive bay mysid test, the estimated Acute No Observed Effect Level (ANOEL) and Chronic d No Observed Effect Level (CNOEL) were 1292 and 194 mg/1, respectively.

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Table 1. Test conditions for toxicity assessment of LCS-1000 discharged to marine receiving waters.

l Sheepshead minnow Bay mysid

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I Temperature (i2 C) 20 20 ,

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. Salinity (i 2 ppt) 30 30 i

> Photoperiod (light /24 h) 16 16 i Test chamber size (ml) 1,000 250 j

{'

Test solution volume 750 200 l 1 (ml) ,

!- Age at start (d) 6-13 <5 l 1

Replicates 2 2 Organisms / replicate 10 10 l

i Feeding no yes

. Test duration (h) 96 48 j Nominal conc. (mg/l):

j as molybdate 31.3 - 2,000 31.3 - 2,000 j as LCS-1000 625 - 40,000 625 - 40,000 I

l l

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i I Table 2. Results of aquatic toxicity tests on LCS-1000 product conducted at NU Environmental Laboratory for two test organisms, with calculated LC 05 values (mg/l), and estimated ANOEL

and CNOEL.

1 Test organism LC3o ANOEL' CNOEL" il l

l Sheepshead minnow (96h) 12311.1 4103.7 615.6 Bay mysid (48h) 3876 1292 194 1

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  • The acute no observed effect level computed from the geometric mean of LC3o values / 3.

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  • The chronic no observed effect level computed from the geometric mean of LC3a values / 20.

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Attachment Laboratory Data Sheets for Acute Toxicity Testing of LCS-1000 Product !

l with Sheepshead minnow and Bay mysid I

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AOL'ATIC ToxicrrY MONITORING RI PORT : PART 2 F ocihty Name:NORTifEAST UTILrrfES Mf11_TIUNE STATION LCL10(O TESTS Saimny:X ist Test temp wure;270,22Ddutum Water Source: tame Island Sound dordan Covei ,

S nnple Collected On:liitdate) Sample Received On:1fAJdates Test Speciesf ar.Whalua Source: Cosper En<nunmental Servres Inc. Age:<5 DaysTest duratum._48)ours Byinning: .11M ( AM) On:2/12.97 (dese) End: 1215 (PM) On:11491(date) .

EFFLUENT Number Organisms Survismg Dissolved Temperature pil DILUTION Oxygen (As LCS-1000) (mg/1) ,

hour 00 24 48 72 % 00 24 48 72  % 00 24 48 72  % 00 24 48 72 l 96 40000 PPM 1 10 0 0 8.0 8.2 7.8 21.2 19.7 20.2 8.7 8.8 8.7 40000 PPM-2 to 0 0 8.0 8.2 6.4 21.2 19.7 20.2 8.7 8.8 8.7 20000 PPM.I 10 3 0 8.1 8.1 7.9 21.3 19.6 20.0 8.6 8.6 8.6 20000 PPM.2 10 3 0 8.1 8.1 6.4 21.3 19.6 20.3 ' 8.6 8.6 8.5 10000 PPM.I 10 8 4 8.1 8.2 8.0 21.5 19.8 20.1 8.4 8.5 8.5 r

9 4 8.1 8.2 6.3 21.5 19.8 20.5 8.4 8.5 8.3

{ 1rtu1 PPM-2 10 F- 7.8 21.5 19.9 20.2 8.3 8.4 8.3

%4 PPM.I 10 10 7 8. I 8.1 5000 PPM.2 10 10 6 8.1 8.1 6.4 21.5 19.9 20.5 8.3 8.4 8.1 2500 PPM.I 10 10 9 8.0 8.2 8.2 21.5 20.1 20.1 8.2 8.3 8.3 2500 PPM.2 10 9 5 8.0 8.2 6.2 2 I .5 20.1 20.6 8.2 8.3 7.9 1250 PPM.I 10 10 8 7.8 7.9 7.7 21.8 20.1 20.2 8.1 8.2 8.2 1250 PPM.2 10 10 8 7.8 7.9 6.2 21.8 20.1 20 6 8. I 8.2 7.9 625 PPM.I 10 10 9 6.4 6.7 6.7 22.0 20.3 20.3 8.1 8.2 8.2 625 PPM.2 10 9 6 6.4 6.7 6.3 22.0 20.3 20.4 8.1 8.2 7.9 CONTROL 10 10 9 6.5 6.7 6.8 22.0 20.1 20.3 8.0 8.1 8.1 (0%)-l CONTROL 10 10 10 6.5 6.7 6.3 22.0 20.1 20.4 8.0 8.1 7.8 (0 % )-2 LC, 954 CONFIDENCE INTERVAL NOAEL COMPlJTATIONAL METIIOD 3876.4 (2481.7-5689.4) MOVING AVERAGE ANGLE PPM Persons conductmg test:.Rull

t AOUATIC T 3XICTTY MONITORING REFORT : PART 2 Fact!ay Name: NORT11 EAST IRIIJr1ES MH I TTONE STATION I CS-1000 TESTS Salmay:E. ppt Test temperature;2[7C lJhlunon Water Smrce:Ione f=8--A Sound (Jordan C art) .

Sample Collected On:IfA.Idate) Sample Received On:EMdate) Test Specesfwrinmkm varieratus Source:NL'EL Stock Agen 13 davs Test duration:SQ.bnurs Begmneg:E06.1AM)

On:2823Z (daie) Endl0111AM) On:2/16/'77 (daten

~

EITLUENT Number Organisms Survivmg Dissolved Temperature pli DILUTION Osygen (As LCS-1000) (mg1) hour 00 24 48 72  % 00 24 48 72  % 00 24 48 72  % 00 24 48 72  %

40000 PPM.I 10 0 0 0 0 8.0 8.2 7.8 7.7 8.7 21.2 19.7 20.2 21.1 20.9 8.7 8.8 8.7 8.7 8. 7 40000 PPM.2 10 0 0 0 0 8.0 8.2 7.8 7.7 5.6 21.2 19.7 20.2 21.1 21.7 8.7 8.8 8.7 8.7 8. 7 20000 PPM-1 10 4 0 0 0 8.1 8.1 7.9 7.9 8.7 21.3 19.6 20.0 21.1 20.9 8.6 8.6 8.6 8.6 8. 6 l

20000 PPM-2 10 7 0 0 0 8. I 8. I 7.9 7.9 5.4 21.3 19.6 20.0 21.I 21.8 8.6 8.6 8.6 8.6 8. 6 10000 PPM.I 10 10 10 10 8 8.1 8.2 8.0 8.2 8.7 21.5 19.8 20.I 21.0 21.1 8.4 8.5 8.5 8.5 8. 5 10000 PPM-2 10 10 10 10 8 8. I 8.2 8.0 8.2 5.7 21.5 19.8 20.1 21.0 21.8 8.4 8.5 8.5 8.5 8. 4 5000 PPM.I 10 10 10 10 10 8.1 8.1 7.8 8.1 8.6 21.5 19.9 20.2 21.0 21.1 8.3 8.4 8.3 8.4 8. 4 5000 PPM-2 10 10 10 10 10 8.1 8.1 7.8 8. I 6.2 21.5 19.9 20.2 21.0 21.8 8.3 8.4 8.3 8.4 8. 3 t

2500 PPM-1 10 10 10 10 10 8.0 8.2 8.2 8.2 8.5 21.5 20.I 20.1 21.1 21.5 8.2 8.3 8.3 8.3 8.4 2500 PPM-2 10 10 to 10 10 8.0 8.2 8.2 8.2 6.0 21.5 20.1 20.1 21.1 21.8 8.2 8.3 8.3 8.3 8.2 1250 PPM.I 10 10 10 10 10 7.8 7.9 7.7 8.2 8.5 21.8 20.1 20.2 21.2 21.5 8.1 8.2 8.2 8.2 8.3 1250 PPM.2 10 10 10 10 10 7.8 7.9 7.7 8.2 5.9 21.8 20.I 20.2 21.2 21.8 8. I 8.2 8.2 8.2 8.. I 625 PPM.I 10 10 10 10 10 6.4 6.7 6.7 6.8 8.2 22.0 20.3 20.3 21.3 21.8 8.1 8.2 8.2 8.2 8. 3 625 PPM-2 10 10 10 10 10 6.4 6.7 6.7 6.8 5.8 22.0 20.3 20.3 21.3 21.8 8. I 8.2 8.2 8.2 8. 0 CONTROL 10 10 10 10 10 6.5 6.7 6.8 7.2 7.2 22.0 20.1 20.3 21.3 21.8 8.0 8.1 8I 8. I 8.2 (0 % )-l CONTROL 10 10 to 10 10 6.5 6.7 6.8 7.2 6.I 22.0 20.1 20.3 21.3 21.8 8.0 8.1 8. I 8.1 8.1 i (0 %)-2 lcm 95% CONFIDENCE INTERVAL NOAEL COMPlTTATIONAL METIIOD 12,311 (10.876 13.937) Spr-man Karber PPM IYrsons conductmg iest:Jtilli JDM