Mag:-.a4= nTVITa:' I.L'MN AT NUM

mm4vater 1.26 611,J;AN:i.

a haying 00,4ium eemimftli oatio at. 1 a r:;00r valityt

an& a .t..er? Of Wac,rAe. goad uat; a olaiDm ckwixaM Ax0d

Yt5A4, tWO brionr

i at prem, abstractioa hemei is detcad alVe,!:g..t -1 put

.Thr ftftre ab-' .Altm tha taLt

ig5Now .r4hen

wium 512

A4

3,00

omIrverf

303. Cal:am

fed

30 AMSATITI„:

01 Une

Uge ef at

ztudo 1A25.,,CW

30

4o r;;;J'Ai- TotAl ar,0

50

60

nramealotz

oWnv tha Laoalt ol• Nkedu

imc,maanay

=O.

3,k':ildt tha mrt1,4 z'ate,,, of.

cweolopment ane at Nobn

3...opto,,,fett

5, iry,2,4 ; th: =an x1.1..ad to tz low

of tQt-er LY.1

lea to PiPt

i.,-;44,70.1.0n Of , ana at

the ftua] ow,:gra oaline , addititn. g'=C VV:

the tA7

5:umnavigs

war. OW,"-;e, reww.Paldatiol= to mkt An

amko

Lwata mand.-torvm to

200 ft thick and 14

ffediN,mta, ottooted t6

%ore ig 1,s. data r.sno5onaft. wagmter

Valloy$,

zuppn.1-A

144100q.41 , txto

Of oat*oics exohgla..- , t=1: tyylif=,

Oenerany Ilf,e v.otqfkiz ,,?-itioE.1,0. .::0'.-:n , .,:i !;4!:.1”.'zi,,;.1s11 ,

.iirmility..va, .7. ..*d on ope..oi-n4:; ,,::: ity a,i,,:, 9 4C,C ad /ft, :7,7e‹.:.:

Itabai oT

_,fir at. ra w., and yiolet vla Int,bably d poi**

Atm *Vim arnleOg va.T.Y,y gram U,4.- ham 700

ft, M/3-z %many mv?

aft eftw .01mr withift a ohtA: , :?4ftlx4 ;;Ize

M6md

part co,- 8tunscr,- qugai,tf,: iake

imr had alraa67 t.?-41:1&4

a'Z'om FOruaryq (G/0 512)44 At thg? th

W6Itue) ftrthm,,, sm*:1:z viern onlIeotoa frnmm tha

A'am.arsim duftn6: n'anl- r 1972 (' 560) et. 110

ovo tho ztuay anetmon*

fmm tho outlei=

vad* tot 164.44

t_th Ivon mangan&ze and min..1.* 0.2 the walym a,Y4'..4A given

Appmfaix: 1 we ftmarlot1 fto a tvilint ('.gig4 2) aaa mar.

(ngoo 3 and 6) at 1g25 0000 bv.400ial wem raft&

exoept X207. tho mAjor anion and gtbdi

ft mmdtg. ax,m on

135, at L51,..0, to the Ttabtl have a, mive

tleAg (*Ulm ia -4=*fai;

thdoo to the tro.t1-4 ar Ngeml r.Y.f

Tha div.A.MJv liao ftftg -oaat,,,Ogiut aPrZtaielY 'ne

hendqvarters to z.itm

302 alumulr - v.12 eicAeA

jat'Aat aqaftrzo'amm

Pigo o

th

▪

ugt-, WWW,

te T*Lwat

minenIize

▪

to

tthe dor41214.„-ot'4',

33 NIP g ne1 aeV010Pw'

6f me:10 e4 p.ropotiomf..

aro ntme0. ,

s elo. ou t trilinearga 01184J 2) ana the (gmae

wnpagitiOlk found a % the dige ot vaI10y‹, the.

diffeweYaloa.Wswthlo t-T. that of the lwAh.

4g

ara

f AYth aVO

71,,w taAk an. flow from

2t00. avdA,

thn tq '4000 gall m. tank at

density heADint.::. iE cravi

thb ,:!:sto Vb. r:...e::Tmett is carried 0.ut, en t.evo

data na.. give in Ag., To

,-. - -.11tAte, from D.44. exA Ane ftamthek::: POint• into the

tato 2 %Apple ucx tAen ft-cm tawer

to t -'ng

:ftlev RDI(q n490

%o a CMG,

7 .:::.CA,',.''A -4r8voLtrod Ceig 2) z.7.4 the

inkweao n'om t.101 and D44 tvaals Ai 78 e'a,sest, wdtea, it$ in

that

.f;n long are OneetAVO and in. terms of

a x4Of

aceptaTZIKr gim kr the 40,1-1 1:1U

J'Omen David,% az0 D65 , tte6 si2)

(40E EEk Lam ifAUs

-ems tourmov

3311 at 1V403 f;0. at A1714

the. potAnitY rpm Aest)0

aIcf1m4 oohl mderat Xc.2 ft.tw

is the iewa4 3C

cr.: eAor vwdat:I.J.on mi,dium is um,4 6/ v (4178 tts46 11, 0P

oalit .SOP C.1.;.deinget

..iiih

• iron ;1f:-.J,T; oazift.c.

iS :tem: 042 that iron

rg

0* htating FA? eaam:f

Tiauaa 8.108ging piptso fowA

the higb. rye ts L

_(. 1rittnt* ' liv4t0 of -po

Atr in aDlo3 lc V ppiy,-,, t 'AJ.:42t Qr

0:e 45 pjx.p thzs

Aroe X'wom ptelUt

borephole '

give

id0 ppm , 0*5 In 4. -

aovation an ta4to

,

•

aloe has the hiehet e 044 1-:!

,1 C1_7 than 0,1,L w,„H44'6 givo C.4,1 ppm eAA th0 f e AbOW

affl 0i,nzt clv.=a0los tUe mter :Dam", :;,hayz. 00Zf A e

ctritag mease04:46 1w the nixe oavle

mad atin

pre.

me. net

k-raualm: r4a1:.:J1 laundry am. tittik;o eb:.n p

the :Aowth baglteriA4, Ta obtain a o s6 qufatty this vahle bt

"4) , a Q*1 ppm or even 0005 Pre.

Zin‹g in the 1 - lose bot

iv the Wxo&

•

At:* t0 with . tho

tWar. " the

It ia sugjostea therefore that ace is nace Of *xi inip bal'ohole/ oither

the- west et "tabu within the Ca,sdominant atne or at Vgaba itse120

kLe.S.IL10- 01401111142.&1110 Tho of a clalY -

low density housing area are high and mIine mtor °sours at X1146 l*aving 4R37,

029A342 and OM a alternative supplio04 Bsrehole Q237 im the nearest available

site and has a gooa ie/d. of 750 aph it is wh R similar °beam' eo*ocition to

the present supply at ?tabu but has a higher total lift (90B pp m) and ig a harder

water with Li silica and iron (20 pp) and thou of poorer quality.

Z042 and 129 at the A4D4M4308404 builaingo. are a/mi-t on the prasent pig

linemnd tIme pi aline costs would btu °hove They have lower total -Ngtlide# but

alec lower yielasj, and.a very hara watern0 Q129 also hn a nitrate valuez. of

45 Moo

Another alternative is Q3020 againv a Ca..Kg4100 water, Thiz.i a yoga

similar in chemistry although greater hardnezzo. to the oroaent Ugabu wurte and

has a end;yield of ii000 b* It has ra. hidhor iron centent Of 2,0 Wm* linter*.

tunately, a longer pipeline mould be needed. to bring this into the present eystem4

The iNtjOr problem with all these boreholes is their tilArd react 4 the

iron can be prooipitated out of the water from the four boreheassfl. Q237 is consi

derea bestl and could be pumpea straight to the tank at the low density area

with none sertoing gent before or after the tank&

5,2 91...tp.x.e.1,212,,..40.1414 Bert- bolo 1449 ligebn ca4 be disregardea

elm to its high CaDe03 Content and excessive nitrts (29 ppm)t aternativeo

ulteo with low pipeline coot would than be 14205 or 144034

roth of these atm have geed yields!, i4 50C gph and 1%200 spia$9. aad areater

yields uId. be obtained by deepening (as also with 1)44)4 Their ohatkistry is

similar to D44 particularly end probably all three tap the nano avitert which

may be ratahaVged from the Nyakamba stream,

If D444 A17 W205 and 111103 were all used v. a total yield on the basin of

pumping toast could be as sueh cm 0,1 pgdm.-zoffioiont for a population of 21000

at a consumption rate of 4 1:1-, /head or two to four timsa as may :people n the

high density housing arm, It in unlikely that such a large Dupply wcul6 be

requiredt and it would only be noosscary to utilize. either W205 or 1111030

MIUre ht aisoest

txtent oAlroi Ult ,

q.7te ,vvei aw3:14: rezdvtd In thr.!..

an aaditiongl th(oo fitt*..1.1

t D44 locAtia

Sim faYad. Geg; -At:54N esal(f.i...n 6

20 nm. arid bitwacnate to !:90 1966 p.0 t

Plaa be'l'oro Xow demaity 1101. have to

A 1?.Qt imn in. the

At Itgaba oo,:m tho 7 1MtdV ic- the

was,y hari 1.1a R..:oczraU:

Oxvmdm:01' it4 of lover:, ;:.!:uaIi7 a.-:4 the

toe --atid and the ivz

The 6V,,:t rIlling aney,

o ptmp 1m a wge.vb-ed

1=.." N342) pft.mta le2.; 5.1.istalledtc.

Mad 6:11W cope. vtth

44 pmapWs 405 ad'forf:

ibriration. of, a mativio izatmace.

Co be attmvimd. by proporlx 09...a pulping t..2.

:ilAd& MAO; bo AAainee de6l*nige h, st

4s;•6• v,--

r-.5.41e of conaiti6E aininOu

punpi2v.;