Publication No. 73-e26

WA-35 1020

John Arnquist, John flodqson

Jim Armstrong

Asotin STP Survey

August 7, 1973

On Monday, July 16, 1973, a survey was run on the sewage treatmentplant for the Town of Asotin. The survey lasted from 0900 hours to1700 hours with samples taken every half hour.

The appearance of the grounds was good and the plant was well fenced.

The BOO reduction was 57% and total suspended solids reduction was

84%.

The chlorine contact chamber should be cleaned out as there is atleast a foot of settleable solids in the bottom. This is probablydue to poor settling of the solids in the clarifier,

The flow of sewage into the clarifier was not checked during thissurvey, It is advisable to check the flow in the near future tosee if the clarifier is being overloaded.

Due to the large amount of settleable solids in the chlorine contactchamber, there is a high chlorine demand resulting in Cl

2 residualsof less than 0.1 and fecal coliforms of more than forty thousand atthe existing flow and chlorination rate.

Provisions for removal of grit from the grit channel should be madesince at the present time it is simply washed into the system witha high pressure hose.

The operator of this plant should havement plant operation, as he has had no

some training in sewage treat-previous experience.

JA:bjj

TO

FROM

SOPJECT~

INFORMAl ‘)O

FOP ACTOlI

p~n~r

OTHER

OA~

State (

Oani~l J, Evans. cCvernor John A. Big~s. Director Olympia, Washington 98504 Telephone (206) 753~2800

STP SURVEY ~PORT FORM

(EvFIrcIExc’ STUDY~)

City Asotin

Receiving Water

Plant Type Primary

Snake River

Popu 1 at io n 745 DesignServed

Engineer Kennedy

Date 7/16 Survey Period 0900-1700 Survey Personnel Jim

Coup. Sampling Frequency 1/2 hour Weather Conditions(last 48 hours)

Clear, hot

Sampling Alequot

PLANT OPERATION

Total Flow 30 - 40 thousand gal, per day How Measured________________________________

Max. (Flow) Time of Max, 14Th. Time of Mm.

Pre Cl2 NA #/day Post Cl 8.5 #/day

2

FIELD RESULTS

In fluent Effluent

Temp.0C 124 I 22 1 22. 23 ~22 21 21.8 22

8.1 6.8 IPHConductivity 7.7 7.89 68 7,2’

.2K1 11

Set tleableSolids j13 2.51 6.6! 4.5 j . .1

Max. MTh. Mean Median Max.I

Mm. Mean Median

LABORATORY RESULTS ON COMPOSITE IN PPM

Laboratory er ~ Influent Effluent % Reduction

5—Day SOD 1 325 1 166 57COD I 748 1 279 641T,S. 1105 t 543 51

T.N,V,S. 588 329 44

T,S,S. 740 119 84N.V,~.S. 272 1 15 94p

11 7.1 1 7.1 0Conductivity 830 1 810 --Turbidity 1 175 50 I 72

Capacity2500

1,000 ml

Arms trong

Asotin

I3ACTERIOLOGICAI. RESULTS

sample before sample was taken

LAB ~ SAMPLI:.G TIME COLONIESflOO MLS (MF)

65 1000 >4 x l0~66 1 1200 22,50067 j 1530 400

rator s Name John Cox Phone L~ 509-243-4411

~cnts: last co1ifoum=~&s1aL

Cl Residual

ypn (after secs)

<.12.0 mm.I

N~ S 0223

added to

U.S. (IiE’AI’TMF MT ‘SF THE IOTF:F-IOM

F~OCF~AL VA I FEZ PCI LOTION COME POE AGEIFIST HATIOEE

SEWAG U TPEAT IPY EL/lIT OP U UATIG’U AIli) 2/Cl UT ENA?-~CE_____ P[ 01 IC US EU U ST I 0>1 1/i RE

CIIECiK ENE jD ATE OF A DI ~

g~.~=~AUOIT 71 PE—AMOET 7 /6

FOrEM APPIE’TVEL)(IMPEL ElUDE AU NO. 42—En 525

PLAtEr OESCFZIE-’TION COOM for Ol(icanl UsoOnly)

1. [‘NO.) FE T (SLID, ~ C-, r)

2.PL,~~?LOCA S o;~ (CI,. CON’)

I3A. FM;,CTION OF A-C FCCULArICN

SLEZV ED U%)

GFI4rRAL IOt=O’(Ii )TIO1

SEOC C PC. PHOCEC T (no~’ pI~nC. zIdd,t,ons, eec.)

DENT N CATION OF AFLAS SERVED

( &~ /13. 20F’UF A,CE

~?~)5~U. PLANT 0 ESIGII po~ nLilu:l OqinC~CerM) ~3C. SEE VEIO lilY PL ANT (domo.,Dc)

4. TYPE OF COLECCTI - C S YC.T~M

4A.

K] COUFTINFO ~7 SE0A RATE LISOTH ~1..-~. ETC FTC-C -C-C,. CC-NT PIPUTED NY SC-EFFACE O~ CIEC.C’IDVATEC- (lIT [ILIAD ~n, o~d)

E..YEAEI CC.JNTYFE SATE.) F NT

SCC-,AN ~5’5•~ C. YEAH F REEF NT SYSTEM PC ACEC H OPErATION

~C. ANCILLARY ,CC-,ISCA. SEVEN ~o. PLANT

SA.SICEGF PLANT SITE ‘SIdeS) 70. APPNOXIMATE AREA LEFT FOR EXPANSION (osros)

IA. IN THE SPACE SPEW’ ~C EC-C.’I IE’N A SIV0CIFIE’C FEC.’. CA WIA’/ EN A •‘.RITT’M AGIEIRTION O~ ‘-‘F PLANT UNTS INFEOWSECEENCE ‘...W.C T’” C-’T~C-T’ CE .JETIF’ATF SEC.~E ‘~-E~AC- SRGF A~;’RO~I.IATE SU’ZAGE AREA5’IALILIZATICC ~ ‘.E. D~ C~ 1N .~A T~E’, FZ. TO AND CRC-N FLANT IS NY FCRFING OR GRAVITY.

L

/7

18. NOTE ANY SIGNIFICANT OR UNIGUE PROCESSING GONPITIONS.

S. R~cEIvINO 5”~AV

9A. NAME OF STHEA’A

Jp<=_ &±~-~u~gEl. STFEs~’ ‘..~os S

INTE Al””’ “‘ — I ~, NATURAL ~“““‘ EEOMLATEO

B. CEIEC-~iC-T OE cY’~o’ICE A’ DL -~ “CT LC()O”.’~ C~EC?TIAT0’I

tA. AN’..’JAL AVLS.SD’~: GAILY PLO?. “AE 1(‘ed) ~ INC-EAR FEC-.” ~A’G ‘—.41

CRY .ILA TIC-P

~. AVEHA”F oOO T.F - A,. S.~..’,A C..’) CAP -. c, ,‘NC-Il)

4. AVERAGE SUACED. N: :C.. CS CO NA,’. E..AZE (Fl,., I)

£~1NTERST.STE

COASTAL

INTFEASC- AC 5

IC. MIINEIUEI F LZV N ATE (I’4JE

r.ET •‘.FAT—E’S

3. ‘~.~CR.GE CETILES OLE SOLID) OF RAE SCA,’ . I.(m1

1 I)

-. A .1IA,. CC...E3’P.I DENSIT f GA RAP A2,,ACC “C-ClIl

~.I. PC.) IC-I ,CEII ,E~~Tl.E2Ju.. .OC.’C. ‘-.j’,C. C-u:’’ ~ C.. ~OC-.I.... ~.l .o. C-OF I-Cl’’’.

_________ — —.—.__________________ ——•—— -————— -—‘—— —““‘ “ —

F WPCA.12 ~ 4

‘7A. DO~ S I’t tNT IEAVI.’ GrANPOY POEI?R CF CURATORFOR MAJOR F’UEN’ItI’, F (CILITIMS’ I yL$I >~<~TJO

e. ARE-’ CHEOHICAT lOll F ATIHTIES PROVIDED’ L~~’YES Li NOIF YLG, ABS.’ICA 8A ‘I ,IOU 0

70. APE QUATE ALARN SYSTEM FOR

F’O’’’LR CIT LOCIPSIC. CII 1-AILUPES’ ~1 YES V~NOP Y ES. IS C HE OPINAT INC CON TRIO’S.) 5? ES I FED

IF’ NO, EXF’LAIN REASON FOR INTEMMITTE NT’ CHLORINATION

8A PUETF’OSE OF CEILOHINAT ICC

/ 1// 4) /.!~ I~ED. TYPE OF’ CH~OPINAT 00

OF APPEICATIC’l OF CHLORINE ED. CAN DY”ASSED SEWAGE F’E CHLORINATED’

[~~<“‘8E. AVEHACC FEED HA” F OF GrILOHIN (IR

1~!1,) SF. CHLO~ INC RCSIDUC-L IN E~~’ C~’NT

MINIFCC-C..iS.)nPLY OF ~ ‘“.1 AT END OF ~AINCTES80. C’,EC 1 NC STO~C CN PENISES (iS)

9. ARE FACILITIES PNIC-”..C-~C FOR COUPLE TE BYPASS OF F.A’.’,’ SV’.AOE’

L~~’ES K] NO F YES. ANSCER A ‘1 HOC 0 DELOW. ANSWER N IN FIT PER CASE.

FELOCONCY (tImeS m.ITCCCy) ]Y~- AVERAGE CICOATION (hours) SC. REASON FOR BYPASSING

/ ~E. DOES SEC,’IAGE OVERFLO’,’l IN DRY WEATHEN’

K] YES

ESTINATED FLOII RATE90. DUHING RYPASS IS

~~ITHIN HYDRAULIC CAFACITY OF PLANT

K] EJEYDOD NYDI

5A~EIC CAPACITY OF FEANT DY

fSG. AG >CICS NOTIFIED 0 HYFASS ACTION

—____________~

9F. TYPE OF OVERSION THCC TORE

/

9H 00 0 ITS HAVE CPTION TO PYPASS INDIVIDUAL PC-ANT UNITS’ (If no. ho tillS canseC ABE’ operolionui problems?)

YES K] NO

ICA. ARE BAG.. FED’?; DEVICES PROVICEB AT ALL CONNECTIONS TO CITY WATER SUPPLY’ (if no, exPlain)

K]YES

108. CHECK TYPE OF PACK F LOW PREVENTION DEVICE

K] DOUDLECHECEIVALVE r””~ PRESSURE OPERATED K]PNYSICAL DISCONNECT K]OTHERI’speCibC)

It. USES OF THEA TMERT PLANT PEE LUERT

/~ /1 ~‘~s ~ III

12. USES OF EECEIVING STRGAM WITHIN 10 MILES OF OUTFA EL

•‘~ 4A 1) 7’,1 9.V.IVF’l 4 ~ I ~x’~C- (~‘~ ~ ~~J¾~t4 ~/I~

IS. E~sE P EN ANY OCOFE COMPLAINTS DEYGlIC THE PEAIV’i PEOPEH 1 Y’ (if yes, eSplaln)HAVE~

~ Cpcfl’ik &//C~.iXJYES K] NO

flf~F

¶4. QOSENVED Ali-PEARANCr. AND CONDITION Or EFFLUENT. RECEIVING ;THEA’.F OR DRAINAGE WAY

FWPCA.—I2 (Oc?. 4—631 (P’,’je 2)

I!’. STAIIIFI I Al ‘CIII FiT.,,,

A. V;I.LC)’., CCI Ill’.) VE~~I.l AT I’1’EC C110’.’l’TH 115 1011115 LEIMIIJAT ID’ Cl. EIArII’.S AlSO CIl-.ES MAINlAIlIICO (cra.s~.III cC-C.)?

[7] YES K] NO [7] YES [1 NO

C’ FENCIIIC; Al. C ‘‘.‘..‘Iu;210 — ICILEBI i-CC 1,51 C LII 510115 . FHLGCLBCY OF INSFEC TIC-IN BYOF’E?IA 1011

AND IN 1,0CC Ill?’ AIII’ YES ND F’HEC-i.N’C11,1

IC. WAFEN UFI’ T B (feel)

HIGH Ii E DI U ‘.1

F. ADEQUAT E! C EN C- I~ CC OF BE HI H’ 0. SEE 1-lAG E RE 10,1 TED’

K] YES 73 HO K] YES [3 ~ok-IC. ANY ?IE.I’C~ IC- Ci- C-.’.CC-Il,C ‘Al IC- CC~2TAMINATICIN FROM i-’ONCo I~i yI.’A, ~II’C II,C-.IIh.)?

K] YES K] Ho

I.MOSGUITO ‘CIRIL DING IF YES. NAME (IF SHEC ES IF J. CAR SURF AC F iICN~GFF ENT CR POND?

F’RDEILE’.’ 1 FCNOY’N

[7 YES K] YES [7 NO

C. SUEEEVISOOY $EE’’rES

1 IS A CONSUET I ID ENGIN WE Fl RET AllIED OR AVAIL AGE E FOR COME.) ETAT ION ON 00 GRATING AND MAIII TEN ANCE P f-DDE EI.IS’

~KF.S [7] NO IF YES IS IT ON: <ONTINUiNG OASIS OR K] UPON REQUEST ITASIS

IF CONTINUING OASIS. WHAT IS THE FREQUENCY oy VISITS:

2. [10 OPERATORS ANDOTHEN PEPSC:~NEE NOUTICCELY ATTEND SNORT COURSES SCHOOLS OR OTHER TRAINING ACT I’,NTIES?

K]YES ~~4o

IF YES, CITE COLIRSE SPONSOR AND DATE OF’ LAST COURSE ATTENDED

IF NO, DO YOU KNOW OF ANY COURSES AVAILADEE TO SERVE THIS AREA”

/ / 1 / ..~ / I /~

t’V “-? ~ /(‘C’ J~ ~‘#~‘ 6. r ~k t.’. k . ~ ~ (~E~

3A. ARE ALE LQ’JU’ C-lENT AND F’Ar.3 O~ THE F’FICS’NT PLANT ST EL IN OF’ERATION~ EKES i..~i‘1 NO (If n~, exp loin)

B. ARE PROCESS1NG UNITS OPERATING AT DESIGN EFFICIENCY? ~4~ES K] HO (if no. exploit?)

4. j’IAVE THEN’ &E1’N ANY DIFFICULTIES WITH THE SEWAGE TREATFIENT PLANT?

A. STRUCTURAL. K] YES ~ ~‘:i y~ explain)

B MECHANICAL ~ YES NO (if yes. ex;II.”in)

CC. OPERA’IIONAE YES ~f’NO (it yes, esplo in)

~/• (‘(~“~‘ C - ~ ‘ Y~t&>;T,C ~ (K ‘ ~ v<>c ~ :7~>

0. BASED ON D~

1! RATIIG EXOEPIE’ICE TO DATE WHAT F ANYCHAMCE~V;OUE’G YOU RECOMMEND TO IMPROVE O’~.~OATIO1l)OF THE PLANT’

FWE’CA~i’2 (FEs. 4—63) ~Pa~e 3)

5 -___lB r’CRBC- IC-’ IS, YES [7] 110ARE 011 TINIT HF ‘IA IIITAIIR --IIt’~I, ClI,’CI, C,’fII’i’1I 1 111,114 j,ICIIIOCC)

HLF’ORI FR’ ‘ [~<“YES - NO“‘0 W1IRHI’ ~)c~i /. /,~: /~

/F-S

rREOJENCY ‘NAT Fl IT FEOlSEUDGO

RANGES DCR1 ‘IIOAC- S

USED IIGEST’CR11

FIAIIDLEDELEC.USED

COST

DATA

AIR

USED

MAIN —

‘1 LNARCE OTHER

DAILY ~$I~” ~

ViE EEL Y

MONTHLY ~7

ANNUALLY

6. ARE LAEORATOF.Y RECORDS I.IAIM TAiII ED’ (cilcck (IpIlrSprIaIC bsx)

K] NOT AT ALE L~4AILY K] WEEKLY K] MONTHLY K] ANNUALLY

IF MAINTAINED CHECK EOiC-?,l OF PEGORD PELOW:

[7] LOG BOOR ~T~DULAR SHEET [7] SEPARATE BY OPERATION K] CONTF1OL CR ARTS K] GRAPHS

WHAT PLANT AND/OR LAF”DCIA’?OO’I’ EQUIPMENT. GAGES ARC ‘ICTERS ARE CAEIORATEO PERIOD1CALLY?

7. IS LAUGRAT DRY TEST INC ACECC-1A3 C FOR THE CONTROL RCQ,CIFICD FOR TFIIS SIZE AND TYPE OF PLANT’

K] YES K] NO (If no, explain)

8. INDUSTRIAL WASTES DISCHARGED TO lIUIIICIPAL SYSTE.¶.A. NUMBER AND TYPES OF INDUSTRIES DISCi-IAHOINO TO SYSTF.’S

B’ POPULATION FOCIVALENT (iC-GO) OF INDUSTRIAL ?.ASTES (pe) C. POPULATION EQUIVALENT (SSI OF INDUSTRIAL WASTES ~pc)

I). VOLUME OF INBUSTHIAL WAST ES IFI6d~ E. COMFO~ITIDN AND CHAHAC TEHISTIGS OF INDUSTRIAL A ASTES

~. MAIN Dli- FICCE S Y C/PS HIEC-ICEC ~C-I Ti-I INDUSTRIAL ~‘.ASTE (elIpImBy

G. HAVE INDUSTRIAL EFFLUENT PROBLEMS BEEN SOLVED’ K] YES K] NO (If yes, hoIIC’?)

SA. METHOD OR EIETSIDCS USED TO ASSESS INDUSTRIAL BASTE TREATMENT COST (check app-opt,ate Sax)

K] NO CHARGE BY CITY K] PROPERi Y TAX K] WATER USC ASSESSIIENT K] CHARGE BASED ON FED’S

K] CHARGED BASED ON COD K]CHARGE BASED ON SS K] OTHER METHODS (dcscrihe)

COMMENT ON NOW CHARGE IS COLLECTED (f:xad cha,~e, slidinD sCale. etC.)

9B. IS INDUSTRIAL BASTE ORDINA’ICE IN EFFECT AND ENFORCED’ F”1 Y0S K]NO

I0. WH

2~,PRCVICCD NITIAL INSTRUC CITATION OF T1,E PLANT’

1NINTH ~>.c 4 /

Ii. IS A lIANUAL Ge PRACTICE OH INS”’ITUCTIOMS AVAILABLE’ I~ YES. WHO WROTE AND PROVIDED IT’

F’$ES “‘mo ~ %fK ‘~. / 9~ / ; ~‘ ~, A - 7

12. ESTIMATE OF SIAN-nOUTS PER “cEK DE~OTCDTG LACORATOCY BOjCK AND I.lAINC-F’CANCE”5’/R~E’DRC S AND H5 ~‘UH’

r

JOB CATEGORY

1. SUPE PINTE’ICC’I

2. ORER-STQ”’S

3. LACORATO~Y TCG~IIIC-I.\M-T

4. LAEGE

t ITS

S. PART-TO-li. CC ~OC-’FCC~CS

6. TOTAl.

‘JWPCA—I2 I PC’.’’ S C’?.Irap~ a;

0. PLANT PERSONNEL’ 4,’n’III .-1

1IC’CI.?’, SIJC f.~ l?,J’B FC’.,’s’,I Y”.I, K’S ICI,’U It? S,’CII~rI ‘‘F’’)

NUMBER

I

TOTAL MAN FIDUPSPER

WEEK

/0

TOTAL NC””j C0

CEITTI CC DRLIT CC 520

‘1

ISA’I’C-C ~‘; lEAFSL’FEC”” cOAT

I’IPE.CIIT FE/NT

E. LANOBATONY CORTPICOL

IAntL’r test eode~ o;’pes~ Ic OpprolTri ~Tte tESTS. If any of the below tests arc used t~ ‘IlOBi tor jBdBSIrjOl V~’CIStL’S P10CC On ‘l.’’ in

~,dditioiT to the test CCdC,

CODhS

— 7 Or BTOrC per V.’Rek 3 — 1, 2, or 3 per week 5 — 2 or 3 per montb 7 —‘ Quarterly 9 — Annually

2 — 4, 5 or 6 per weeD 4 — OS re~uircd 6 — I per month 8 — Semi—Annually

1. BOO

ITEM

2. SUSPEMUCO SOLIDS

3. SETTLEAREC SOLIDS

4. SUSPENDED VOLATILE

7. VOLATILE SOLIDS

8.

9. TEMPERATURE

10. COLIFORM DENSITY

11. RESIDUAL CHLORINE

12. VOLATILE ACIO$

13. 1.1. B. STADILITY

5. DISSOLVED OXYGCN

6. TOTAL SOLIDS

14. ALICAL

IS.

16.

17.

18.

19.

YEAR OF OPERATION jSALARI ES:WAOES

MOST CUE~ENT YEAR 19

ELECTRICITY CHEMICALS MAINTENANCE OTHER ITEMS TOTAL

PRIOR YEAR 19

PRIOR YEAR 19PRIOR YEAR 19

EVALUATION PERFOPRED BY TITLE ORGANIZATION

F. OPERATIQO AND i-IAIIITENAtICE COST ROR PLANT

A ‘ --

IN FO1’I’.IATI.””I FURNIS”’EG SY

FWPC\—12 (Pew. 4—61) (Pa-~~ 5)

TI ‘IL E ORGANIZATION I DAT 9

— A; -

G. NOTATfOOS DY EVA LUATOP

1. ADDI TOOAL N EM A RICS (It ,ernnl’ks reI,2r to 0 pB~’I~C ,,I,~’ iDro, ,CenI iy by’ non~bcr)

2. GENERAL COMMENTS 014 HOUSEKEEPING AND MAINTENANCE

3. REQUIREMENTS OF NIGRER AUTHORITY

3A. DOS THE PLANT PROVIDE THE DEGREE OF TREATMENT PRESENTLY REQUIRED BY THE STATE? (finn. exp!ein)

LI YES [jNO

3B. ARE THERE ANY PENDING ACTIONS fenforeee,enl conferenceS. chance in wOler qBatity standards. dc.) THAT WOULDPEQUIRCUPGRADING OF TREATMENT bY THIS PLANT?

PEli YES Eli NO (If yes. explain)

/ K

3G. NUMBER OF STATE INSPECTIONS OF PRESENT PLANT TO DATE.

4. IS ANY FOLLOW—THOU ACTION R5OJI~D TO (II CORRECT DaFI~I~’NCIES IN THE PLANT OR ITS OPERATION OR

(21 RESOLVE INDUSTRIAL WASTE PRObLEMS? (If yes, describe ,ee,o,r~d correctD.’e actiOn) L YES NO

FWPCA— 12 (Rev. 4 —65) (P~~)e 6)

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S

STATE OF WASHINGTON

DEPARTMENT OF ECOLOGY

WATER QUALITY LABORATORY

DATA SUMMARY

ORIGINAL TO:

COPlBS TO:A ~*~/~/

LAB

Source /150T

Date Collected 7 i~/z~

Log Number: ?3~ 2S~

Collected By YP

Goal, Pro./Obj,

Station: 71io

~PH j,7(Turbidity (JTU) 7

~mhOs/cm~@2~cj~ 3o

COD

BOO (5 da ) 5~9

Total Coliform (Col./lOOml)

71 -T___L) ~QO 70

Conductivity C

00340

00310

f~ ~ZLL--_

31504

Fecal Coliform (Col./lOOml) to 2 -~ 31616

N03—N (Filtered) 00620

N02-=N (Filtered) 00615

NH3—N(Unfiltered) 00610

T. Kjeldahl-~N (Unfiltered) 00625

O-~PO4--P Filtered 00671

Total Phos~ -P (Unfiltered) 00665

Total Solids b-S 141

2L

1L

J5jj

00500

Total Non Vol. Solids j~CTotal Suspended Solids 00530

Total Sos. Non Vol. Solids 27

Note: All results are in PPM unless otnerwise specif~ed. ND is “None Detected”Convert those marked with a * to PPB (PPM X 10 ) prior to entry into STORET

Summary By ___________ Date / SC’

Table IV 6RESULTS OF DOE’s EFFICIENCY SURVEYON ASOTIN’S S~T.P.

FIELI) RESULTS

Parameters INFLUENT EFFLUENTTested Max. Mm. Mean Median Max. Mm. Mean Median

Temp. 0C 24 22 22.9 23 22 21 21.8 22

p1-1 8.1 6.8 7.7 T8 6.8 7.2

Conductivity(j~mhos/cm)

SettleableSolids 13 2.5 6.6 4S 02 0.1 0.1 0.1

LABORATORY RESULTS ON COMPOSITEIN PPM

Parameters Influent Effluent % ReductionTested

5-Day BOD 385 166 57

C.O.D. 748 279 64

T.S. 1105 543 51

T.N.V.S. 588 329 44

T.S.S. 740 119 84

N.y.S.E. 272 15 94

pH 7.1 7.1 0

Conductivity 830 810

Turbidity 175 50 27

BACTERIOLOGICAL RESULTS(*)

Samplin5 Time Colonies/100 MLS (MF) Cl Residual

ppm Time elapsed

1000 >40,000 <0.1 3 Mm.

1200 22,500 <0.1 3Mm.

1530 400 20 3 Mm.

1’) (Ne2 S~ O~ added 10 s~impIe before earnp!ing)