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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)