ML20079L716

Renewed & Amended State of Tx NPDES Permit TX0064947 Issued to Houston Lighting & Power Co

ML20079L716
Person / Time
Site:	South Texas
Issue date:	10/02/1991
From:	Hall J TEXAS, STATE OF
To:
Shared Package
ML20079L710	List: ML20079L716 ST-HL-AE-3915, Forwards Renewed & Amended State of Tx NPDES Permit TX0064947
References
TX0064947, TX64947, NUDOCS 9111070058
Download: ML20079L716 (25)

Text

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6. ,

' PERMIT NO. DD pa i (corresponds to NPDES PERMIT-NO. TX0064947) .

l This permit supersedes and replaces-Permit No. 01908 approved August 20, 1985.

TEXAS WATER COMMISSION-Stephen F. Austin State Office Building 1700 N. Congress Ave.

• Austin, Texas 78711

, PERMIT TO DISPOSE OF UASTFJ under )rovisions of Chapter 26 of-tie Texas Water Code I Houston.l.ighting and Power Company whose mailing address is

'P.O. Box 1700 Houston, Texas 77251 is authortred to treat- and dispose of wastos from the South Texas Project Electric-GeneratingStation(SIC 4911) located -approximately 10 -miles north of Matagorda Bay and 12 miles south-southwest of the City of Bay City, Matagorda County, Texas to the Colorada River in Segment No. 1401 of the Colorado River Basin ,

only in accordance with effluent limitations. monitoring requirements and other conditions set forth herein, as well as the rules of the Texas Water commission

~ (" Commission"),= the laws of the State of Texas, and other orders of the

. Commission. The issuance of this permit does not grant to the permittee the right to use private or public property for-conveyance of wastewater along the herein described discharge route.- This includes property belonging to but not

-limited to any individual,' partnership, corporation or :other entity. Neither

-does this permit authorize any invasion of personal rights nor.any violation of federal.c stato, or local laws or regulations.- It is the responsibility of_the permittee - to: acquire property rights as may be necessary to use the -herein sdescribed disclearge route.

This permit and the authorization contained herein shall expire at midnight, five years after the date of Commission approval.

2nd -day of 0:tdur ,

APP {0VED,'ISSUEDANDEFFECTIVEthis-199 ATTEST:

A4A_

[) Q Fh/the Comission.

9111070058 911031 8 DR: ADOCK 0500 l-

Outfall Numberfs1 001 EFFLUENT LIMITATIONS AND MONITORING REOUIREMENTS C f' 5

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1. During the period beginning upon date of issuance and lasting through date of expiration, the y authorized to discharge from the cooling pond subject to the following eff'.uent limitations:

The total volume " Tr The daily average flow of effluent shall not exceed 144.0 million gallons per day (MGD).

discharged during any 24-hour period shall not exceed 200.0 million gallons.

Minimum 5 elf-Monitorino Reauirements k

Effluent Characteristic Discharae Limitations Report Daily Avg. & Daily Max.

Daily Avg Daily Max Single Grab mg/l Measurement Frequer,y Sample Type og/l mg/l Record (Report) N/A Ccntinuous (*1) ,

(*6) (Report)

Flow (MGD)

Estimate g ll Colorado River (Report) N/A 1/ day (*l)

Flow (MGD) (*6) N/A 1 In Situ <

Temperature - N/A Continuous (*l)

Degrees F 95 (*2) 97 (*2)

Total Residual No Detectable Chicrine (*3) N/A Quantity (*4) N/A I/ week (*l) Grab (*S)

(*1) When discharge occurs from Outfall 001. River flow monitoring required 1/ day for each day that a discharg required only when discharging from Outfall 001.

(*2) See Other Requirements, paragraph 6.

(*3) The See Other Requirements, paragraph 7.

(*4) Practical Quantitation Level (PQL) is 0.05 mg/l

(*5) Samples shall be representative of periods of chlorination.

(*6) See Other Requirements, paragraph 3.

2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 1/ day, by grab sample. (*l) i

3. There shall be no discharge of floating solfds or virible foam in other than trace amounts and no discharge of visible oil.

c

> 4. Effluent monitoring samples shall be taken at the following location (s):At Outfall 001, which is at a convenient  ;

point in the blowdown line prior to entering the Colorado River. -8

EFFLUENT LIMITATI0riS AND MONITORING REQUIREMENTS Outfall Numberfsl 101 v. ='

EE GE

1. During the period beginning upon date of issuance and lasting through date of expiration, the permittee is . 43

, authorized to discharge low volume . wastewater (*l) comingled with previously monitored affluents (PME) E e-j [ neutralization basin discharge] subject to the following effluent limitations: 3j V 55 Effluent Characteristic Discharce limitatinns Minimum Self-Monitorino Recuirements Y' Daily Avg Daily Max Single Grab Report Daily Avg. & Daily Max. EE (Report) mg/l mg/l (Report) mg/l N/A Measurement Frequency Sample Type 1/ day Estimate

[p Flow (MGD) a

. Total Suspended "

Solids 30 100 (*2) 100 1/ week Grab (*3) n Oil and Grease 15 20 (*2) 20 1/ week - Grab (*3) g

?.

5 (ol) See Other Requirements, paragraph 8.

(*2) Instantaneous Maximum.

(o3) If more than one source is associated with this particular waste category, grab samples from each source shall be analyzed and the analytical values combined on a flow weighted basis with the calculated values used to determine the Daily Average for the month. The highest analytical value of all grab samples for the monthly reporting period shall be reported as the Daily Maximum.

2. There shall be no discharge of floating solids or visible foam in other than trace amounts and no discharge of visible oil.

3. Effluent monitoring samples shall be taken at the following location (s): At sample point 101 where low volune c wastewater (*l) comingled with previously monitored effluents (PME) are discharged from the treatment facility  ;

prior to mixing with any other wastestream. g s

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-EC C& i

g . ' EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Outfall Numberfs1201

• .E7 O

1. "1.

E 1. During the period beginning upon date of issuance and lasting through date of expiration, the permittee is; authorized to discharge low volume wastewater (*l) (011y Waste Treatment System] subject to the following effluent j j-limitations: ,g;

., r 3.2

• Effluent' Characteristic Discharoe Limitations- Minimum Self-Monitorina Reauirements E,!

Daily Avg Daily Max Single Grab Report Daily Avg. & Daily Max. E. t mg/l' mg/l- ag/l Measurement Frequency Sample Type m (Report) (Report) N/A 1/ day Estimate E.

Flow (MGD) 4, Total Suspended.

SolidsL 30 100 (*2) 100 1/ week Grab j**3) o ,

011 and Grease 15 20 (*2) 20 1/ week . Grab s 3) 8i i

t

(*1) See Other Requirements, paragraph 8.  ;

(*2) Instantaneous Maximum.

(*3) If more than one source is associated with this particular waste category, grab samples from each . source shall  ;

be analyzed and the analytical values combined on a flow weighted basis with the calculated values used to determine the Daily Average for the month. The highest analytical value of all grab samples for the monthly reporting period -

shall be reported as the Daily Maximum.

1 .

2. There shall-be no discharge of floating solids or visible foam in other than trace amounts and no discharge of visible oil. g i

3. Effluent monitoring samples shall. be taken at the following location (s): At sample point 201 where low volume j.  !

wastewater is discharged from the' Oily h'aste Treatment System prior to mixing with any other wastestream.

r I

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Outfall Numberfsl 301, 401 and 601 'E5

1. 5 7&

1. During the period beginning upon date of issuance and lasting through date of expiration, the permittee is - #"

f authorized to discharge treated sanitary sewage effluent- East Side Facility (301), treated sanitary sewage 5E

% effluent- West Side Fact'aity (401) and treated sanitary sewage effluent- Training Area Facility (601) subject to g

r the following effluent limitations: {"

uo Effluent Characteristic Discharoe timitations Minimum Self-Monitorino Recuirements E.

Daily Avg Daily Max Single Grab Report Daily Avg. & Daily Max. "E mg/l mofl mg/l Measurement Frequency Sample Type o 1/ day Estimate  ?

Flow (MGD) (Report) (Report) N/A A Biochemical Oxygen n Grab Demand - 5 day 20 45 (*i) 45 1/ week 8

Total Suspended Solids 20 45 (=1) 45 1/ week Grab ]

(*1) Instantaneous Maximum.

2. There shall be no discharge of floating solids or visible foam in other than trace amounts and no discharge of visible oil.

3. Effluent monitoring samples shall be taken at the following location (s): At Outfall 301 where treated sanitary sewage effluent is discharged from the sewage treatment plant prior to mixing with 'any other waste stream; At Outfall 401 where treated sanitary sewage effluent is discharged from the sewage treatment plant prior to mixing with any other waste stream; and at Outfall 601 where treated sanitary sewage effluent is discharged from the s sewage treatment plant prior to mixing with any other waste stream

• O

EFFLUENT LIMITATIONS AND MONITORING REOUIREMENTS Outfall Humberfs) 501'

,, y

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1. During the period beginning upon date of issuance and lasting through date of expiration, the permittee is 7-c authorized to discharge metal cleaning wastes (*1) subject to the following effluent limitations: ((E g

g7

. m =r -

. Effluent Characteristic Disciarcel limitations Minimum Self-Monitorina Recuirements ?E Daily Avg mg/l Daily Max mg/l Single Grab mg/l Report Daily Avg. & Daily ".ax.

Measurement Frequency Sample Type (5

gg F1ow;(MGD) .(Report) (Report) N/A 1/ day (*3) Estimate a Iron, Total 1.0 1.0 (*2) 1.0 1/ week (*3) Grab Copper, Total 0.5 1.0 (*2) 1.0 1/ week (*3) Grab g 5'

.E<

(*1) See Other Requirements, paragraph 9.

(*2) Instantaneous Maximum.

(*3) When discharging.

2. There shall be no discharge of floating solids or visible foam in other than trace amounts and no discharge of visible oil.

3. Effluent monitoring samples shall be taken at the following locaG7(s): At Outfall 501, where metal cleaning wastes are discharged prior to mixing with any other waste streat S

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Outfall Number (s) 002 jj EFFLUENT L1HITATIONS AND MONITORING REQUIREMENTS *E ea

% 'r-EE if

1. During the period beginning upon date of issuance and lasting through g[ date co 2 limitations:

million gallons per day (MGD). The total volume {[

The daily average flow of effluent shall not exceed 0.060 ng discharged during any 24-hour period shall not exceed 0.120 million gallons.

2 Minimum Self-Monitorina Reauirements {

Effluent Chartctfriit_iq Discharae Limitations Report Daily Avg. & Daily Max. n i

Daily Avg Daily Max Single Grab o mg/l Measurement Frequency Sample Type (LDs/ day) mg/l mg/l Estimate j i 1/ day.

(Report) (Report) N/A a i Flow (MG!4 l Biochemical Oxygen 45 1/wcek Grab Demand a 5 Gy (10) 20 45 (*1)

Total Fusp9nd%f Grab Solids (10) 20 45 (*l) 45 1/ week This waste stream shall be chlorinated sufficiently to maintain at least a 1.0 mg/l chlorine residual after at least 20 minutes contact time based on peak flow and sh&ll not exceed a 4.0 mg/l chlorine residual and shall be m 2/ week by grab sample. Alternate disinfection methods may be used upon prior approval Ly the permitting (ol) Instantaneous Maximum.

2. The pH shall not be less than 6.0 standard units lor greater than 9.0 standard uaits and shall be monitored 1/ week, by grab sample.

3. There shall be no discharge of floating solids or visible foam in other than trace amounts and no discharge of visible oil.

At Outfall 002, where the North Side

4. Effluent monitoring samples shall be taken at the following locatio.i(s):

Sewage Treatment Plant discharges prior to mixing with any other waste stream.

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M*3nf15t$ im MPm togetMITIM W c# rt ain reguleu ens o;ver u st at4.r s Ct. enter s' 4. .

At feedred h Title li Temaa torvittintis la tauu discharge permite.

khirtist r Allative cme de!!nnions (fac) contaited to Sectacc h.001 of the fuu ninter (cos

&&liticmal dellrdums of words or tar mu s wo se apply % thle terskt and an locorpors ki battia by t of u ance ,

this potut att na follows:

a. Flor. Iteewinants the srtuseetic everage of all detarolutloos of the hilt discharge Att.is a ;ert:4

4. Catly evange flow - The onilt avstage f ices aetsisinatico shall carist of seterstraticess neoe on tw at of one enjendar mocth. If instantaneous measurements are uand to de t usite W dailt dis sat ge.

least four esparate ders.

detustanure shall be h everage of all it.st antanema measunanots Daily everage taken durig flow a 34 hourforpatied

$vterascenon or during the period of daily disebarge if less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

intumineet dischar9ms shall ccaelst of a minisun of three f1w detersinsucos ce date of discharge,

- the measured flow durirq be atM== tise required to epnte its flw si e r.ng

b. !wetanteosous flow device.

• & masisus flow egetaleed for a tus hour ;w e n s.

s. 2tsur pek (6:nesuc anatesotar treatamat plaats) khiple enamurganats . of itstantaboona masisue llcie vahit a dur ing the Mslod of daily discharge.

two hour period mey be nM* red to the putitted 2-tar pek f Joe.

d. fiallt eastman (Inv - N higreat total flee permitted for a 24 bour period.

7. rametratica naesuremants

- W erithmetic avera;re of all affluent s.argics, cugosite or gra:

c. imilF everege concentratim requi.ed by this permit, 4 thin fora& period of one calaodar mastic wastewater treatmentmonth, plants casisung

- hn four of%1es at least ue oct fou se pt.te repthseetet.tvo measurementa. (1) available in a calendar sooth, the arithentic average (welphted b3 ficm) of all values in tr.e prev;oss four anarcutive senth period nmetatlag For all of et lust otbar eastewetar four nnasurements trsatenot plants

- Whenshallfour to utilized serr,1.s .r ees rnotthe caur everage concsetretion. (11) evellable in esLlendar auth, the arithmetic evarego (weighted by flow) of all values taten uring the sci.th shall be st'.*11 sed as the daily avarnge n=rantnfice,

• the aritteentic avange of all effluent angles, cra m aite or gram, vathan a

b. 7-day eversos conceritratico period of me caleodar week, consisting of at least three separate anasurements.

===1== cerendratico asasured on a slogle dap (by compoalte samp4e),

c. Imil; mant== cmcentration - N

d. recal tc.liform bacterie the ruder of colonian par 100 millilitars offluent.

3. Swaple type t*gona t e masple - a saas,lo made up of a minintan of three efflaer.t porttons collected in a.r.:x;.:. W. .c.,

us a.

74 h:ur parted or durirq the priod of dailt disclarge if lass than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, ard cmttad pr W 1onal to flow collected no ejceer tMa two beurs; or a negle continuous 17 collected, frWintt to fb, in a etetinuous 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Mrted ts durlog the period of daily discharge if less than 24 bours,

b. Crab oseele - an individual sasele collected la less than n minutes.

Idasteweter facilitias used la the conveyance, storage, trsateent, reef:.anc. .astes

4. treetaset recility (facility) of- sumicipal sewege, inkstrial wastes, agricultural wastes, er iantce,recreauoeal reclaesuas and/or Ai apr=ai or owe wastas incl.silag sledge bandllag or disposal facilitana wAac the jurisdictice of the

• t a.n S. De toca " sludge" cNL11 mean the solids and precipitates seperated from westeweter by unit processes.

ese act regulated as hasardous imete.

MC9ftMIEC M4 HMTIBG

1. Sell lieporting 31 TLC $XS.125(17) Naltoring results shall to provided at the intervals spectiled in tbo parth.

te.less c h rvise opw.ified in this perait or otharvise ordered bt the Cwalsaico, the peruutee shall e ,nA ef fluent smglirq and rvporting to acenrdance with 3173C $$319.4-319.1.

Unlese otherwise specitled, a conthlr effluent report must be sutaitted each manth by tbe ?uth car of the discharge vtdch is dascribed b7 this persit wbethor or ret a diset.irov as maar fer foNvN that mrna. ocata for **chenAire an; falso stateau.nt cc any such report ear result in the intshaon et erte ;a.

Inovtrgir er4/or civil penalties as provided by State 1sw.

TWC 10/84 D::33 i - _ _ _ _ _ _ _ - _ _ __

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. ' . bst truewaiaru u. 4; TA p,llutacts shell c(gl) with J,r 0% res s pe c t f iv<t (cr the nnants,a of Test p neeArea Ik asut

• ment s, t e st s, otd calcolattas shall to sceurstelf ocerseushed in a rey eseeteti,e (6119.10 311.11.

emaner.

3. Pectada of toedtg 31 nc $%)'4111) haitori,wt ard reporting requitwents are es follows:

(a) hmitoring saeg-las abt omantomaats sha14 be ukan at times arra in o mar.re r so as to ce rep the ennnored actaviti. cAlit>r suon ard uw er.a:. e ,

incAuding rttip charts ard receros t.f (b) Nolt(, ring and riparung recer da, ccpl6s of all records tsquired by W pe rmit, and the esttification requred tg 40 Code w: ..e f eca r a.

se9uhuce.s 52ta.1)(b)l9) shall te retained at W forllity site for a perica or tene rust tre.

date of un record or 6awle. measurement , report, or certification. Tbl6 psicd mat s to uterded at we request of tte encvues director.

(t) R* cords of scaMoring activitle.s shall idelude b following (1 ) date, une and place of eenple or esasureseM (11 )

identity of irdavilhal who couected the soeple or meh the seasurement; date s,t at.alycis; (in) idenity of Oe irdividual ard laboratory who performed t.he acaltsis; (le)

(, ) tre technique or settod of awlysis; and

• 5 (v) ) the risdts of the arAljsis or seuurwesot. 1 ne priui durtog whic.h reen 6s are required to in kept shall be autout acauy uur4ed sc, ed i:.ru ' .e flhaJ disprauuce of any edainistrative or judicial anforement actico that mar te tr6st nuud ap;rm tre permittee. 9

4. naaltional tLehoring b) Permittee l if the parsince ecnitors any pel naet at the aslocatice(s) specified nieve, designated tbt essets herein (,f more tregmoup suca e:aaerbs (nat tthan od.s ca req.e ares or this p4wn wing approved a.alydw enthods calculation t.nd raporting of W value rJained on the r,q.'.r ed preit monucsipnance shan be results includedofinsuch the mordtering that todicate perun cosphoocs wf eass te repcited l monthly efilant report. Thelacrsamed frogmocy of anspling abau be indicated ce the report.

and locluded in calculaums,

5. Calibretire of irstruments 611 autcneue 11ov neuuring andhr recording devirss arwt/or totalising se(ars required by the 7:ts;t te sessaing perstt lialt ed flows shall ba accurately ralibrated by a uair+a paesco et pinot ctat tSt and as iJten thereat wr u neceAcarf to ensurel'uch aceuracy, peram but shnu tot less often verify in vtiting than annallt tre the crassa 3evice sa irbortatt t7 tr.e

crat;

;

taecutive Director for a lenger priod, Crpass of W verificauco ari.1 tw kept et the plant b.t r for at leut properly .sd gavitg accurate r+sults.

ihreo 7saia.

L. rtgliance Scbeduje Reports 31 The $305.125(18)any sepertscceplianesof coupliane scheduletirofnonctsellanes the permit abau wub, or any progress to sutrutted no later tha: report.s it uis on, in requitan=nts contauwd t r.

folleving anch scLedule date.

1. Buemophance botificatico

a. *1 T&C $30',.175(1) Dnlass specified otherwise, hueso boalth the permistee or safsty, or theshall report any occcasoliasca otr.roommet. Report of ra:r. to the executive director stach may nadaa9ar laformatica shall be petrridad assily within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> from the use the MrsWtee beamens aware of o m nipliance.

A wtuten suhaisaloo of such inforanths aban alsoThe be wrpro,16ed within five vorung dafs ntaa autmaaston shall contata a of the time the permittee becreas swers of the ==Tlianer.

owecripuen of the w= - ritance and its cause; the potectial danger to bunne health or safety, or N,t 19 environnects the parlod of ocraccupliance, including sanct dates and times; if the ococcagliance has been corrected, the anticipated time it is expoeted to continue; ord, step takaa or plar.ned to reda:s, elialaate, ard prevent recurrince 9f Oe wwmpMance, and to muigeta its eivues af fects,

b. inY ocsccess.11acca which is 40% over the permuted efflueet limiteuce sha M be reprted osa11T w bours and in writing to tre District Office within 5 votaing days of bomning aware of the cordation, 04- ata required c.

1 TLC $305.125(12) Ant enoccnpliance other than that speellied la this sectic'n, is. correct 3y, shan to resorted to the uerutiv. dirnt er u tafnimadon not autadtt ed r>r submitted provtly as possible. (This requirement omans to remrt the w types of norunpliance on the muntn;f meJ!-report iorm)

8. Signatorian To Ewports t., stree rr 31 T&C 5305.1s5(14) au re; orts and otrar ictormatico requarted by the executive director sr 11 its persco are in the e nnes required by 31 TAC $305.128 (relatizq to Signatories to Aw;crts#.

~-- . .- -- - ~ ~ - - - - - .-.- - . . - - - - - - - -

,it.C' ciatom 1ts .

1; *<i#r=1 e

s. il Mc $=n.u$(lv) ishuts s Wcejlsed p6tm,ttee beromes lacorrect ware thatinn are information fe41ed to surmat amlicatloa or erinresecutact r e (g,rt s e' . to a r.tre p rait og!Lcatlan, ce esmrtive director, it saajj pt:mptir sutstat such f acts or information,

b. This parsit is gear.ted oo W t4 sis of the lof erentit4,wrurgy suppJied ard caand repr necteu pleteosas or.s of that Lafanae oreauor. Lt t e1 r.e te r rharles ttn- applicatico pre m s and la reliance Liter actice acmi gportuni )upers it' or a heartre, this praat est tv mdift.c.

those repasseetsuons. -e with 31 ut 305.61 306 68, dur1Jg its ters 1:t p.speil,d, or revoked, to vncie or is part in acco cai,e Lacluding, tut na Iwed to, um fellcwing Violatice of enf terms or coodaticos of trtis pars'.t1 (1)

(!!) (Ataininrj this pr%h by alarspresentatie or f auure to discluso full! all relevant facts; or (111) L ran;ge tu act cor4Mion unt requires either a temporar3 er prisummet reduction ue authort ad discharps.,

upon request a4 . i t t.;, a

c. 31 76C $t05.U5(6) The parwttte stu21 furnish to the esecutive e _ m, reaanneble time, anf taf orwtian to detartine Tre permittee whether shall causeWesivu eM fursiars for em wiing, the pecuuve revoaung director, upon regen,- or, m.sg 4 or term 1Asting - the permat.

ay.es of acords required w te ten ey the permit.

2. e4wellence of the permit by the Mrson to whcm it as twes est. int e n a:

coe.;e: ar.

a. 31 T&C $30LINand AcceFtancs agreement wt mich ptson wiu casq:ly with all the tare v4 conasuor.:

w ow=ledgeannt Ha, parutt, and ne rulms ard other orders of the commassion.

ta:; e  :

b.

)) ** 5'20L125(1) Tne nraittee has a a outr to cayJr with sti condjtece.s of str prut , N= cc tS e g ly with any pernat - condhian cous.itutes a violatite of the persjt ord the Was unter Tesa, sw11d Waste DLapuaal &ct,pera and Le grounds n rerewal for enfartenant applacation or of action, an oppitcation for persat for amendmect, a perr t !ar re

(* suspension, et for darual of a another faciuty.

g. 31 Tnr. p0012513) h sbau not to a defanas for a prmittee in an enforceamat action that ;t tem mata vow.r.

twee accessert to belt or reduce the petit.itted activity in order to melotaan caspa, at.ce

-osstu3ter.s of the petien.

I ar., ab ,:,e

d. 31 TRf 5300 125( O The permittee 61.au take au reaaor.able steps a mialaise or cornet .w <s.t e s tspect on tne envirorum.nt rasulting irts ococcupa tance vitahethe peret erivist. nan, t.and ahna) carry out s e:P.

as are ra6amable tc, prevent sagrJicata advsree 1 spec a on hiaman health or 45 re i -e.

Tn* $33%171(t) AJttcrtratjoc frae no ocumission is reqdred before togtcrung act aatge p=rsitted facilatt or actuity wt unld rsault in oceccoupliance vnh other pemat regairements.  :

7 .e f.,;s; 31 TAC $4L12',(15) & M m h ear be amarded, suspended and retsaued, or revded for aase. e e a r eque.-t bf the p e tittee for a reimh aantdemt, suspension and re t asuar.ca , or terst unor.,

I.

rottlicataos of planned caanges or actacipated nonecachance, dans act star act permat conditloc.

e.

Ther, sbali av un cathorazed bypssas of mastewater. For purposes of taas po m t a cigs4

y. cos.sla red the discharge of untrasted or partially treated wasteater which escends the ar.permi Acutlag wastaustar around a treatment unit or ur ts ren.t;:n is eat ca ead solair by an act of God. In tM evoet t!.st a c.s:narpe ,!

i 4 4 A harge .which does not exceed parait 1.iaits la not a bypaae.

p stially or s'reated wastewater Ccamission is enticipted for authorustira to cause to discharge a violatica untreated or partial); of pruit trusteolimits applicat wasteweter he sutsnitted to the purmanos to Sectim 26.0191 of t.be Tamas Water Code and 31 ftc 30021305.30.

3. taspectia s and tatry

s. 3. Tnt $300125(10) Inspectico and entry sha n be allound as prescribed 4471 7, 57.in the Tomas unter Co 26, 77 and 28, and the femas Solid Waste Disposal act, Tomas Civil Stautes,1rticle b..

Ytw enders of ne saudasion and esplurens and agents of the a=iantre are actitled to enter ont p ur private preparty at any roescomble timeNrgbers, for the esployens, purpose of or incpoeting agents actingani investigatira under this autharstreno relating to the quality of water la the state.

wM enter private }.reparty abau observe the establishment's rslas and regulatione coccarnarc saf

' anternal securatt, and fire patectjes, and if the property has - 9= - t in a nswance, shan!!not:ff a:t m=-t or the perste tren la charge of his preserwe and shau entGau proper cred+ntaals.

enseher, esploree. or seent is refue=d the right to enter in or on pubuc or private presertf urd.r ttus authoritt, tre esecutive director mer invoke the remedies authorised in Taras Water Code Sectson 26.1

_ m

4. Fe .ut na r&*ot

t. bas) give nours to the e secuu ve director prior to u n ic.) .

t ina pc%)N1) N serCtue

=)t er some or soit t ims to tha perwt W1 leenlltf if wch altatettons or w11t ama swi d r egar e a piW. .m,4de.nt car - result in a valedon of prsit reqdrisesota, .ig; b.

A bir to eng f ac1ht? eoit!!ca t loc.s , Mdiucm and/orthe esu;ers1Mee naaonseurtof aappl p rw9 ufored facilit, ano erat ou san pr ote r luct aaee tte plant catwelty terood ne perN tted f e ev, sauur.wuce item tha Crussiaston t=f ore cusevncibg ctm* rvc11ce.

c. M TLC 9 0 % )25(2) N p=rsittee esart app); for an emardmant or rerewal prior to erptration of tre estau ng praat in west to continue s termited activity after the aspiratico date of ne ;e rs t .

1sWrh.etica, to coetuon such estivat viu tars 1Jante upe We ef f ediv's dania) of said application, ti- e d.

Prior to screpttng vast u vtich are not daset tled La the persh applicadon or wtuch would r ua;'.

gipmfleast ctange in the quantity or qualty Tbe of the prelttee nisting naast awaydischarpe, for a persu neanordemet prunt6e sust repcrt ur reflecting '.: e pecpeed etages to the Casaission.

recasanry chagas is pruit conditions, inchmilag offluant unitauona for pollutact.s not 16eou!\ed ed limited tg stis prsit. ta.

Na, Wetar ccde t>26.029(b) Liter e public heartM, notlos of which

c. Camissica sief reqJ1re We peruhtee, fica time to time, for paad w uee, te corJors toot+w stall tu given to the p rx' t ee ,

treorrev 6 2.u;t.a.

or

- ccoillions.

b Cassisaton abad allow W prmutee a roastmable time to cor.fors adtitional cond;ucns, mut oc swM;atico of the pars 1No, the Ccumalsaico est grant 6dditiotal unne.

5. Peru n Trnestat N Ccreeassion sna;. x N estarion opprtwaJ pust be obte ned.

b trior to any trsnsfar of this perm t, rrsui ted, in vr t utig, ot eni craNo in ccadtt4 c owoorship of f oc uhles outberttad of t r.. a F r* t .

Tsh ristification should be stat to the Pers41 ipplirauco Onit in Go Water bout? Division.

74* W . e.t

b. 31 ins

• 9001/503) A pwtsit wf to transfertsd cedt according to the pr wis tor.s of 31 (reintM to linnafar of Persits) and M TLC 30L91 (relettag tu &ctivo cm Appucation for Trsruter).

6. neleucuship in llatardaras Waste Activities d.; s ,x>.a. .ra c e This prut &aes not auttmar ite act activitt of basardcus solid waste storage, processtag, or requires e Ptsit or ottar auuorisation pursuant to the Texas Solid Waste Disp., sal het , truc;e + C Vertee's Lnnotated Texas Civu Statutas.

1, telnimstdp to Wetu tights Dupeaal of trsated efflusot by arar esas.s otber tLas discharge directl; to the veters in toe .austcc r  : :. or cultical'43 autbcrited in this pornu and mai reqdre e perun pursuant to Chapter u of tte W as Code.

W. hoperty ligtne 11 TLC 90L125t16) L paridt doas coat conver any propert; rights of eat mart, or ar t esclus:.ve ortvtlege.

9. htmit taforenabi3hy 4. ,

%e rtalhlucs of Gia prsit are sevetable, amt if sof provisico of th16 ;=rmit, or the ap;;1utu ;;r. m er d pinvlsion el this peran to any circumstances, is held irw alid, W eppu tauen of nach prcv a m.

citruestaccas, erd tbo rama%e of this permit, shall not be af fected tharsby.

[ H A m cal tit D EMDr?S a r sterv 1.

M Tir, 90L125(5) h parsittee shall at all times prtgarly ope sts ard mal.otain all faciMuss a .d .cr.. e v ,

af treatment and control (and related appurtenancas) ubich are installed or used by the prsattoe to caspliance with W condutons of W permit. -

2.

te. lass othervies spec 1!)ed in this -parmit 319.29or otharvise ccmcorning theordered byofum disc 2ntpe Ccsudulon, certain has.ardous W parsittee estals, and aposr.a . . . :x. ;y with all previstma of 31 TAC %319.23 ropmd of the executive dir ector, the parshtee atall taka saeplas of W final efflwant and provide prcer erslysis of such samples la ordar to Amm,metrate ,vapliaDce vlO t.beto ru.las.

3. In n cortlancs eith 31 TLC 935.6:

s. h permittee shau notify the Czecutive Director in vt ating of act cJoente acuvity or t a:a ht y e=Tanalen at least 90 days prior to corducting such activity.

b.

Clorws activities include those assaciated with act pit, pond, lagocm, or surf ace Ampouratont re g o ed by u n s pe2 mit. I.

16 serpnne,bie f or tratallity pisor to past st ar t up, and nut s+qwnt ly wanteintN. coep .e 4, add eg,44 gw. ni t t.

da to , r e vnt the discharg= of urarnated or tr % telt treated c.;te s dwrtre electrical sowu failutna W asard of alterwte power wurces, st ardtry geoerators, and/or retection of ir g icir treet 4 mete nter, Aer, a roodily . eccessable sanpatog point and.

b.

Ord cs othervise specified, the permittee shall provide ep$ 1 cable, ao elfimot !)ow sensuring 6evnes or a so ns by which ef flwot !)ow may te det e mire 1

infloot anaturing.

Tbe pruittee shall realt na annual waste trsetnabot irepection fee to the ccrgussacri as required M 31 ut 45

c. f ailuze to Mr th1J foe met issult in tsvocatice of tAls pumit.

( M cbeptor R).

1. Donarettuan st4. .

for a)) citt u notifications to the Ccumisalon req. tired of the permittee by this pamit, the peru tt ee keep and anAs availabla a copf of each such tott!1catice, u;cc the same baals as self-sor.ntor ing date ar e required to be kept mod ende evallable.

6

^ - - - - - - - - - . - - - - - - - _ _ _ _____ __

llouston Lighting snd Power Company 01908 South Texas Project bTHERREOUIREMENTS

1. Rainfall _ runoff discharged from any point source from the plant area not identifiable oy outfall shell not: (a) contain floating solids, visible oil cr visible foam in ot'ner than trace amounts, (b) have a pil less than 6.0 nor greater than 9.0 standard units at any time, or (c) exceed L chemical oxygen demand of 200 mg/l nor an oil and grease concentration of 15 mg/l on a grab sample. This provision applies to plant drainage ditches and include plant site dewatering and/or fire training water discharges which discharge to sters in the State.

2. Di .harges from sources such as reservoir relief wells, reservoir spillway gate leakage, condenser box drainage ard any ground water monitoring wells are autherized. These sources may discharge to tne Colorado River, to the West Branch of the Colorado River, to little Robbins Slough and the East Fork of Little Rokbins Slough.

3. For Out'all 001, the discharge from the cooling pond shall not exceed 12.5

% of the not flow of the Colorado River at the discharge p61nt and there shall be no discharge from Outfall 001 when the receiving water flow adjacent to the plant tite is less than 800 cubic feet /second.

4. The samoling locations for all Outfalls shall be chosen (and constructed) by the company after discussion and mutual agreement between the company and the TWC District Office personnel.

S. There shall be no discharge of polychlnrinated biphenyl transformer fluid.

6. Daily average temperature is defined is the flow weighted average '

t mperature (FWAT) and shall be computed and recorded on a daily basis.

FwAT shall be computed at equal tim: intervals not greater than two hours.

The tathod of calculating FWAT is as follows:

TWAT = SUMMATION (INSTANTANE0klS fl0W X INSTANTANEOUS TEMPE%U)RE1 SUMMATION (INSTANTANEOUS FLOW)

" Daily average temperature shall be the arithmetic nerage of all fWAT's calculated during the calendar month.

" Daily maximum temperature (also known as the maximum daily value) shall be the highest fWAT calculated during the calendar month.

7. The term " total residual chlorine" (or total residual oxidants for intake means the value obtained using the amperometric method water with for total bromides) residual c hlorine described in 40 CFR Part 136.

8. The term low volume waste sources" means, wastewaters from, but not limited to: wet scrubber air pollution control systems, ion exchange water treatment system, water treatment, evaporator and boiler blowdown, laboratury and sampling streams, floor drainage, cooling tower basin cleaning wastes and blowdown from recirculating house service water systems.

Sanitary and air conditioning wa.stes are not included.

i Page 8

l llouston Lighting and Power Company 01900 South Texas Project OTHER REQUlf?tiMIS

10. The permittee shall conduct effluent sampling and reporting in accordance I with 31 TAC 319.5 319.6. A monthly effluent report must be submitted each I

month by the 25th day of the following month for each discharge which is i described by this permit whether or not a discharge is made for that month.  !

Knowingly making any false statement on any such report may result in the imposition of criminal and/or civil penalties as provided by State law.

This provision supercedes and replaces Provision 1 Self Reporting as defined on Page 3 of this permit.

11. Mixing Zone Chronic toxic criteria apply at the edga of the mixing zone. The mixing zone for Outfall 001 (for each jet port) is defined as a volume within a radius ,

of 60 feet extending over the receiving waters from the point where the discharge from each jet port enters the Colorado River.

12. Blomonitoring Requirements:

Since the discharge from Outfall 001 is intermittent, the biomonitoring requirements shall remain in effect until four biomonitoring tests have been completed.

I l

l l

Page 9 ,

u.,_ _ _ _ . _ ._ _ ., . _ . . . . _ . _ , _ _ . _ . _ . _ _ . _ . _ _ _ _ _ . _

llouston Lighting and Pocer Company 01908 South Texas Project CHRONIC B10 MONITORING REOUIREMENTS MARINE

a. The provisions of this section apply to Outfall(s) 001,

b. The permittee shall test the effluent for toxicity in accordance, with the provisions in this section. Such testing will determine if an ,

appropriately- dilute effluent sample affects the survival and/or  ;

reproduction or growth of the appropriate test organism.  ;

Toxicity is herein defined as a statistically significant difference at the 95% confidence level between survival and/or reproduction or growth ,

of the appropriate test organism in a specified effluent concentration and the control (0% effluent). ,

Lethality, a component of toxicity, is herein defined as a statistically significant difference at the 95% confidence level between survival of the appropriate test organism in a specified effluent concentration and ,

the control (0% effluent). .. t Significant nonlethal effect, a component of toxicity, is herein defined as a statistically significant difference at the 95% confidence level between reproduction or growth of the app,'opriate test organism in a s)ecified effluent concentration and the control (0% effluent .

T1e permittee shall initiate the following series of tests with)in 90 da of the effective date of this permit. All test organisms, procedures, and quality assurance requirements used shall be in accordance with  !

"Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters-to Marino and Estuarine Organisms (EPA 600/4 87/028),"

or the latest revision- of this document. The TWC may require the permittee to repeat a test, including the control and all effluent dilutions, if the test acceptability criteria, procedures, and quality assurance requirements defined in the test methods are not satisfied. The following tests shall be used:

1) Chronic static renewal 7-day survival, growth and fecundity test usingMysidoosisbahia(Method _1007.0).

2) Chronic static renewal 7 day larval survival and growth test using sheepshead minnow (Cyorinodon varieaatus) (Method 1004.0),

c. Five effluent concentrations in addition to an appropriate control (0%

effluent) shall be used in the toxicity test. These additional effluent concentrations shall be 100%, 50%, 25%, 13%, and 6%. The low flow is defined as 25% effluent and effluent the 1/2 low concentration (critical dilution)2 flow effluent concentration ( times the critical-dilution) is defined as 50% effluent if more than 20% of the test organisms in any control die, that test, including the control and all effluent dilutions.

-shall be- repeated,

d. The samples shall be collected at a point following the last treatment unit. Dilution water used in the toxicity tests will be the receiving water collected as close- to the point of discharge as possible but unaffected by the discharge.

Page 10

- Ifous'tonLightingandPowerCompany 01908 South Texas Project QIRONIC B10 MONITORING RE00lpfMENTS: MARIff[

If the -receiving water is unsatisfactory as a result of preexisting instream toxicity (greater than 20% mortality in the control), the permittee shall substitute synthetic dilution water for the receiving water in the rotest required in item c. above provided the following stipulations are met: (a) a synthetic dilution water control was run in addition to the receiving water control; (b) the synthetic dilution water had 20% or less mortality, whereas the receiving water control had greater than 20% mortality; (c) the permitteo submits all test results on the receiving water with the report and information required by items k.

and 1. below and the Blomonitoring Report Forms for the reporting period and (d) the synthetic dilution water has a pil, and salinity similar to that of the recet,ving water.

The permittee may substitute other appropriate dilution water with chemical and physin1 characteristics similar to that of the receiving water if approved by the permitting authority. Synthetic dilution water may be used exclusively for the control in a11' subsequent tests provided all of the above stipulations are met,

e. A minimum of three (3) flow weighted 24-hour composite samples representative of dry weather flows during normal operation will be collected from Outfall(s) 001. The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> composite sample consists of a minimum of twelve (12) effluent portions collected at equal time intervals and combined proportional to flow or a sample continuously collected poortional to flow over a 24-hour operating day.

The maximum holding time for any effluent sample shall not exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The toxicity test must be initiated within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> after collection of tne last portion of the first 24-hour composite' sample.

Samples shall be chilled to 4 degrees centigrade during collection, shipping and/or storage.

The 24-hour composite samples must be collected such that the samples are representative of any periodic episode of chlorination, biocido usage, or other potentially toxic substance discharged on an intermittent basis.

If flow from the outra11(s) being tested ceases during the collection of effluent samples, the requirements for the minimum number of effluent samples, the minimum number of effluent portions, and the sample holding time, are waived during that sampling period. llowever, the permittee must collect an effluent composite sample volume that is sufficient to complete the required toxicity tests with daily renewal of the effluent.

Where possible, the effluent samples used for the toxicity tests shall be collected on separate days if the discharge occurs over multiple days.

The effluent composite sample collection duration and the static renewal protocol associated with the abbreviated sample . collection must be documented in the full report required in item k.

f. The toxicity tests specified above shall be conducted once per quarter.

page 11

Houston Lightin and power Company -

01908

', South Texas Pro ect QEhlt 810 MONITORING R{0VIREMENTS MARINE.

g. Lethality Testino - Special Condit.igni

1. If any toxicity test at the 25% effluent concentration demonstrates lethality, the permittee shall resample and again cor. duct the toxicity ,

test (s) for the species that showed lethality within fifteen (15) days of test completion. There shall be a total of three (3) consecutive toxicity tests during a forty five (45) day period. If one or more of the retests show lethality in the 25% offluent concentration, the

, permittee may suspend additional retesting for this reporting period and shall notify the TWC in writing and submit all test results within fifteen (15) days. ,

The permittee may be required to conduct further monitoring studies if biomonitoring, data indicate multiple numbers of unconfirmed toxicity events.

2. If the testing frequency in item f above is monthly, the permittee may substitute the biomonitoring conducted during a retest for the next monthly routine biomonitoring if the time of the retest coincides with the next monthly biomonitoring. Concurrently with the retest, the permittee must also conduct the next month's required biomonitoring for the species that did not demonstrate significant lethality at the 25% effluent concentration.

3. Within thirty (30) days after submitting the test results which demonstrate lethality in one or more of the retests, the permittee shall submit to the TWC a Reduction Evaluation (TRE)The .

general outline outline shallfor initiating include, buta is Toxicity not limited to, such things as: assigning project personnel; a time schedule for obtaining consultants, if needed; a discussion of avrilable influent / effluent data available for review, and specify an initiatien date for the TRE with a proposed schedule of specified activities / testing.

days after initiating the TRE, the permittee shall submit

4. Ninety a specific(90) detailed plan and schedule for performing the TRE. The TRE shall be designed to determine the general cause of toxicity, possible action to eliminate or reduce the toxicity and develop a corrective action schedule. The permittee is required to implement the TRE with due diligence and shall submit quarterly summaries to the WC concerning the project results.

If after initiating the TRE, the effluent ceases to induce lethal responses in the test organisms, the permittee may discontinue the TRE requirements and continue with the remainder of the biomonitoring testing required in sections f. through J. A cessation of lethality is defined as no lethality at the 25% effluent concentration, using the test procedures required in sections b. through e., for a period of four (4) consecutive months with at least monthly sampling and testing. Such evidence shall be submitted to the TWC with a statement of intent to cease the TRE.

Page 12

NoustonLightingandPowerCompany 01908 South Texas Project

.(HRONIC B10 MONITORING REQUlpfMENTS: MARINE l This permit may be amended to require a compliance schedule for i implementaticn of corrective actions and/or permit limits based upon I the results of the TRE and proposed corrective actions.

5. The provisions of g.1. and g.3, are suspended upon submittal of the l TRE Plan.

6. If any rotest in, item g.1 indicates lethality at the 25% effluent concentration, th6 permittee shall continue biomonitoring c:uarterly (as a minimum) during the TRE, using the most sensitive species. The biomonitoring procedures epecified in items b through e above shall be utilized.

h. Honlethal Effects Testing _,Soccial Condition!

1. If the testing frequency w Med % item f. above is quarterly and '

if any toxicity test ioquired in 8'.ams b:-f. above demonstrates a significant nonlethal eFed 4 he 25% effluent concentration, the permittee shall biomonitor e per month, for an additional twelve (1 ) consecutiva months follow'ag the tcxicity test iaf'.ially showing si nificant nenlethal effer'.:e If only one species demonstrated a si nificant nonlethal effect at the 25% effluent concentration, the permittee may perform the additional 12 consecutive biomonitoring tests utilizing that species only, in this event, the permittee shall continue the first year's quarterly biomonitoring tests for the species that did not demonstrate a significant nonlethal effect. Upon completion of the additional testing requirements, the permittee shall continue biomonitoring utilizing both species specified in item b. once per six (6) months until the expiration date of the parmit. The same procedures specified in items b. - e, above shall be used during the monthly, quarterly, and twice yearly testing.

This permit may be amended to require effluent limits, additional testing and/or other appropriate action to address non lethal toxic effects.

2. If the testing. frequency specified in item f above is monthly and if any toxicity test required in items b. - f. above demonstrates a significant nonlethal effect at the 25% effluent concentration during the first year of testing, the permittee shall continue biomonitoring after the first year of testing- at a frequency of onw per six (6) months until the expiration date of the permit. The same procedures specified in items b.- e. above shall be used.

1. If lethality is shown at the 50% effluent concentration and toxicity is not shown at the 25% effluent concentration during the first year of testing, the permittee shall continue biomonitoring after the first year of testing at a frequency of once every six (6) months until expiration of this permit utilizing the same procedure as specified in b. - e.

above.

This permit may be amended to require offluent limits, additional testing and/or other appropriate action to address toxic effects.

Page 13

ilouston Lighting and Power Company 01908  :

South Texas Project CHR0t41C B10M0t41TORifiG RE0VlREMEf4TS: MARltiE

j. If the toxicity tests do not indicate toxicity at the 25% effluent concentration and lethality at the 50% effluent concentration during the first year, the permittee shall certify this information in writing to the TWC and these blon.onitoring requirements shall expire,

k. The permittee shall prepare a full report of the results according to EPA i 600/4 87/028, Section 10 Report Preparation. The full report must be submitted with the first biomonitoring test results, but need not be submitted for subsequent testing unless requested and shall be retained for 3 years at the plant site.

1. The permittee shall submit the toxicity testing information contained in Table 1 of' this permit to the Wastewater Permits Section of the Water Quality Division, fa. If monthly biomonitoring is required, the biomonitoring test reports are dus on or before the 25th day of the month following sampling,

n. If quarterly biomonitoring is required, the biomonitoring test results are due on or before April 25th, July 25th, October 25th, and January 25th, for biomonitoring conducted during each calendar quarter.

o. If semi-annual biomonitoring is required, test results are due on or before July 20th and January 20th for biomonitoring conducted during the previous 6 month period,

p. The percent coefficient of variation (standard deviation x 100/ mean) for the mean percent survival shall be 40% or less for the control (0%

effluent), low flow dilution and 1/2 low flow dilution.

Should the percent coefficient of variation be greater than 40%, the toxicity test, including control and all effluent dilutions shall be repeated. If significant lethality was shown at the low flow effluent dilution or half low flow effluent dilution, this coefficient of variation requirement shall not apply.

l Page 14

~

1

' 01908 Houston Lighting and Power Company

' South Texas Project .

TABLE 1 (SHEET 1 0F 6)

MYSIDOPSIS BAHIA SURVIVAt., GROWTH AND FECUNDl'lY Dat.e Composites No. 1 FROM: 10:

Collected No. 2 FROM: 10:

No. 3 FROM: TO:

Test initiated: am/pm date Dilution water used: >

teeiving Reconstituted water water ,

PERCENT SU8 HYAL Percent Effluent Time of Reading 0%  %  %  %  %  %

24h 48h 7 day DATA TABLE FOR GROW'fH OF M. BAHIA Average Dry Weight in milligrams in replicate chambers Effluent Conc. {%) A B C D E F G

~

0%

~

I Page 15 l

e Houston Lighting and Power Company 01908

. South Texas Project .

Table 1 (SHEET 2 Of 6) tiyllDOPSIS BAHIA SURVIVAL, GROWTil AND FECUNDITY DATA TABLE FOR GROWTil OF [L_,Wla 0%  %  %  %  %  %

~~~

Mean Dry Weight (mg)

CV (%)*

• coefficient of variation - standard deviation x 100/mean NUMBER OF FEHALES WITH EGGS 0 7 DAYS Percent effluent (%)

REP 0%  %  %  %  %  %

A B

C 0

F

~C~

H I

~

J Mean %

Fecundity Page 16

. . . . . . . . . . - . . . ' H

i Nouston Lighting and Power Company 01908

' South Texas Project ,

TABLE 1 (SilEET 3 0F 6)

MYSIDOPSIS BAHIA SURVIVAL, GROWTH AND FECUNDITY

1. Dunnett's Procedure or Steel's Many One Rank Test as oppropriate:

Is the mean survival at 7 tiays significantly less () 0.05) than the control survival for the % et' fluent corresponding to (' ethality):

a.) LOW FLOW OR CRITICAL DILUTION (25%): YES NO b.) 1/2 LOW FLOW or 2 x CRITICALDILUTION(50%): _

YES NO

2. Dunnett's Procedure or Steel's Many One Pank Test as appropriato:

Is the mean dry weight (growth) at 7 days significantly less (p=0.05) than the control's dry weight (growth) for the % offluent corresponding to (significant non-lethal effects):-

YES NO a.) LOW FLOW OR CRITICAL DILUTION (25%):

b.) 1/2 LOW FLOW or 2 x CRITICAL DILUTION (50%): YES NO

3. Dynnett's Procedure or Steel's Many One Rank Test as appropriate:

Is the mean number of females with eggs (fecundity) significantly less (p=0.05) than the control's number of females with eggs for the %

effluent corresponding to (significant non-lethal effects):

a.) LOW FLOW OR CRITICAL DILUTION (25%): YES N0 b.) 1/2 LOW FLOW or 2 x CRITICAL DILUTION (50%): YES N0

4. Enttir percent effluent cor esponding to each N0EL (no observed effect level) below and circle lowest number:

a.) N0EL survival =  % effluent b.) N0EL growth -  % effluent c.) NOEL fecundity-  % effluent Page 17

llouston Lighting and Power Company 01908

o'uth Texas Project TABLE 1 (SilEET 4 0F 6)

SilEEPSilEAD MllitiOW LARVAL SURVIVAL AND GROWill TEST (der.inodon var _teg_algi)

Date Composites No. 1 FROM: ,,

10:

Co11ceted No. 2 FROM:_ 10:

No. 3 FROM: 10: ,__,

Test initiated: am/pm date Dilution water used: Receiving Reconstituted ,

water water DATA TABLE FOR SHEEPSHEAD HINf10W SVRVIVAL Effluent Percent Survival in Mean Percent Conc. % Replicate Chambers Survival ,

A B C D 24h 48h 7 days

~~

07.

7.

7.

~

7.

• coefficient of variation - standard deviation x 100/mean Page 18

. l e

Houston Lighting and Power Company 01908

< South Texas Project ,

TADLE 1 (SilEET 5 0F 6) 010 MONITORING REPORTlHG SilEEPSilEAD HINNOW LARVAL SURV! VAL AND GROWill TEST (C.yfrinodonvarieaatus)

DATA TABLE FOR GROWTil 0F SHEEPSilEAD MljiRQ)$

Effluent Average Dry Weight HEAN Cone (%) in milligrams in ORY replicate chambers WEIGili CV%*

A B C D (MG) 0% ,

~

~

• coefficient of variation standard deviation x 100/mean ,

1. Dunnett's Procedure or Stet..'s Many-One Rank Test as appropriate:

Is - the mean- survival at 7 days significantly less ()=0.05) than the control survival for the % effluent corresponding to (Lethality):

a.) LOW FLOW OR CR111 CAL DILUTION (25%): YES N0 b.) 1/2 LOW FLOW or 2 x CRITICAL DILUTION (50%): YES NO Page 19

Ho'Jston lighting and Power Company 01908 South Texas Project ,

TABLE 1 (SHEET 6 0F 6) 810 MON 110 RING REPORTING SHEEPSHEAD MINNOW LARVAL SURVIVAL AND GROWTH TEST (Cyprinodon.varieaat.n)

2. Dunnett's Procedure or Steel's Many-One Rank Test as appropriato:

Is the mean dry weight (growth) at 7 days significantly less (p 6.05) than the control's dry weight (growth) for the % effluent corresponding to (significant non lethal effects):

a.) LOW FLOW OR CRITICAL DILUTION (25%): YES NO b.) 1/2 LOW FLOW or 2 x CRITICAL DILUTION (50%): YES NO

3. Enter percent effluent corresponding to each N0EL (no observed effect level) below and circle lowest number:

a.) NOEL survival -  % effluent b.) N0EL growth -  % effluent Page 20

- - . - - - . - . - - . , - , _ - - . - . . . . _- . . . _.