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ENGINEERING STUDY for
THE GARDENS AT NORTH CAREFREE WASTEWATER SYSTEM IMPROVEMENTS
March 6, 2019
Prepared For:
Mule Deer Investments, LLC 2727 Glen Arbor Drive
Colorado Springs, CO 80920
Prepared By:
Stantec 5725 Mark Dabling Boulevard, Suite 190
Colorado Springs, CO 80919 719.432.6889
Project No. 187608744
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* * * * * * C O N T E N T S * * * * * *
1.0 EXECUTIVE SUMMARY .....................................................................................................1
2.0 INTRODUCTION ...................................................................................................................2 2.1 Purpose .....................................................................................................................2 2.2 Scope ........................................................................................................................2
3.0 EXISTING CONDITIONS ......................................................................................................3 3.1 Description of the Service Area ...............................................................................3 3.2 Land Use ..................................................................................................................3 3.3 Topography and Floodplains ...................................................................................3 3.4 Geology ....................................................................................................................3 3.5 Groundwater ............................................................................................................3 3.6 Climate .....................................................................................................................4 3.7 Natural Hazards Analysis ........................................................................................4 3.8 Organizational Context ............................................................................................4 3.9 Wastewater Facilities ...............................................................................................4 3.10 Relationship to Neighboring Water and Wastewater Facilities ...............................4 3.11 Wastewater Demand ................................................................................................4
4.0 DEVELOPED CONDITIONS .................................................................................................8 4.1 Land Use ..................................................................................................................8 4.2 Population and Employment ....................................................................................8 4.3 Wastewater Demand ................................................................................................8 4.4 Wastewater Treatment .............................................................................................8
5.0 WASTEWATER SYSTEM IMPROVEMENTS ....................................................................9 5.1 General .....................................................................................................................9 5.2 Wastewater Collection and Treatment .....................................................................9 5.3 Rates and Charges ....................................................................................................9
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* * * * * * A P P E N D I C E S * * * * * * Appendix A Cherokee Metropolitan District Report Appendix B Cherokee Metropolitan District letter of commitment * * * * * * L I S T O F F I G U R E S * * * * * * Figure 1 Vicinity Map Figure 2 1-Mile Radius Map Figure 3 Utility Plan
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1.0 EXECUTIVE SUMMARY This report presents the results of the engineering study for wastewater system improvements serving The Gardens at North Carefree, a proposed development located south of North Carefree and east of Akers Drive in El Paso County, Colorado. The Gardens at North Carefree consists of 71 single family lots on 11.56 acres. The service area is located within the Sand Creek Basin. The proposed development is within the Cherokee Metropolitan District service area. The average wastewater to be produced by The Gardens at North Carefree is estimated to be 15,718 gallons per day; the Cherokee Metropolitan District will treat this wastewater. The Cherokee Metropolitan District operates under a permit issued by the Colorado Water Quality Control Division, providing for discharge to the Black Squirrel Creek.
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2.0 INTRODUCTION
2.1 Purpose The purpose of this report is to present wastewater system improvements recommended to serve The Gardens at North Carefree, a land development project located in El Paso County. It is also intended to serve as a guideline for the ensuing design of recommended improvements.
2.2 Scope The scope of this report includes: 1. The definition of the service area as well as identification of significant physical and environmental
characteristics and constraints; 2. An analysis of available data to determine existing and to project future wastewater demands; and, 3. A description of legal, institutional and managerial arrangements that ensure adequate control of the
proposed improvements.
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3.0 EXISTING CONDITIONS
3.1 Description of the Service Area
The Gardens at North Carefree development consists of approximately 11.64 acres with a mixture of residential and open space uses and is located due south of North Carefree Circle and due east of Akers Drive within the East Half of Section 29, Township 13 South, Range 65 West.
Property west south and north of the site is currently being served by the Cherokee Metropolitan District for both water and sewer.
3.2 Land Use
The Gardens at North Carefree development is located in El Paso County on the eastern edge of the City of Colorado Springs urban development. Vacant land can be found east of the site. Most of the vacant land has been through City or County planning processes for development.
3.3 Topography and Floodplains
The topography of the service area is typical of a high desert, short grass prairie with primarily relatively flat slopes generally ranging from 2% to 4%. However, slopes in the 6% to 10% range can be found along the eastern boundary. The service area drains generally west to Akers Drive were existing water and sewer stubs are located.
The Flood Insurance Rate Map (FIRM No. 08041C0539-F dated 3/17/99) indicates that there is no floodplain in the vicinity of the proposed site as shown on Figure 2.
3.4 Geology The site is composed of a single soil type. From the NRCS report in Appendix A, the site falls into the following soil type: 97 – Truckton sandy loam (3-9%) – Type A Soil Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. Group A soil is defined by: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission.
3.5 Groundwater No shallow ground water has been identified on site.
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3.6 Climate The climate of the study area is characterized by mild summers and winters, light precipitation, high evaporation and moderately high wind velocities. The climate of the site is typical of a sub-humid to semiarid climate with mild summers and winters. The average temperature is 31 degrees F in the winter and 68.4 degrees in the summer. Total annual precipitation is 15.21 inches.
3.7 Natural Hazards Analysis Natural hazards analysis indicates that no unusual surface or subsurface hazards are located in the service area. However, because the soils are cohesionless, sloughing of steep banks during drilling and/or excavation could occur. By siting improvements in a manner that provides an opportunity to lay the banks of excavations back at a 1:1 slope during construction, the problems associated with sloughing soils can be minimized.
3.8 Organizational Context The Gardens at North Carefree is located in El Paso County and lies within the service area of the Cherokee Metropolitan District.
3.9 Wastewater Facilities Primary Wastewater Facilities are located outside of the boundaries of the Gardens at North Carefree development. Cherokee Metropolitan District facilities include:
Wastewater Treatment Facility Wastewater Collection and pumping facilities
3.10 Relationship to Neighboring Water and Wastewater Facilities
The location of other major water and wastewater facilities, relative to the Gardens at North Carefree Development, are shown on Figure 2.
Figure 2 identifies water wells and habitable buildings within a 1-mile radius of the center of The Gardens at North Carefree. No known wells are within the 1-mile radius.
3.11 Wastewater Demand The Gardens at North Carefree will be serviced by the Cherokee Metropolitan District and is assumed to have the same unit wastewater demands as the rest of the Cherokee Metropolitan District. Residential Demand within the District is estimated to be 80% of the water demand of 0.31 ac-ft./year per SFE or 22.01 ac-ft. or 19,648 GPD; Waste flow is estimated to be 15,718 GPD.
Figure No.
Client/Project
Title
MULE DEER INVESTMENTS, LLCGARDENS AT NORTH CAREFREE
VICINITY MAP
187608744
1.0
JANUARY, 2019
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5725 MARK DABLING BLVD, SUITE 190COLORADO SPRINGS, CO 80919
Figure No.
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Title
MULE DEER INVESTMENTS, LLCGARDENS AT NORTH CAREFREE
ONE MILE RADIUS MAP
181710214
1.0
JUNE, 2017
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5725 MARK DABLING BLVD, SUITE 190COLORADO SPRINGS, CO 80919
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THE GARDENS AT NORTH CAREFREE
MASTER UTILITY PLAN
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4.0 DEVELOPED CONDITIONS
4.1 Land Use
This report addresses The Gardens at North Carefree development anticipated to be submitted to El Paso County for review in August of 2018. The proposed use is for 71 single family lots.
4.2 Population and Employment By using the land use information noted above and applying standard unit densities of 2.9 persons per dwelling for single family residential uses, 2.5 persons per dwelling for multifamily residential uses and 600 square feet per employee for commercial/industrial uses, permanent resident, and employment forecasts for The Gardens at North Carefree are 206 permanent residence.
4.3 Wastewater Demand Residential Demand within the District is estimated to be 80% of the water demand of 0.31 ac-ft./year per SFE or 22.01 ac-ft. or 19,648 GPD; Waste flow is estimated to be 15,718 GPD.
4.4 Wastewater Treatment The Cherokee Metropolitan District has treatment facilities to meet Colorado Department of Health and Environment standards. This treatment process is outlined in the report in Appendix A.
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5.0 WASTEWATER SYSTEM IMPROVEMENTS
5.1 General The wastewater system operated by Cherokee Metropolitan District meets the applicable requirements of the Colorado Department of Health and Environment (CDHE). The wastewater treatment facility is located in the Black Squirrel Creek Basin and processes wastewater to CDHE and U.S. EPA standards prior to discharging.
5.2 Wastewater Collection and Treatment The wastewater is collected and conveyed to the Wastewater Treatment Facility via a series of underground pipe systems. All pipe and appurtenances will be designed to meet or exceed AWWA standards. The Wastewater Treatment Facility operates under a permit issued by the Colorado Water Quality Control division, providing for discharge to Black Squirrel Creek. Water quality testing indicates that the treated wastewater exceeds CDHE and U.S. EPA standards prior to discharge back. Specifics concerning treatment are provided in the District report in Appendix A.
5.3 Rates and Charges The Cherokee Metropolitan District will impose one-time charges to recoup the cost of constructing water system improvements as well as regular periodic billings to recoup continuing costs for operations, maintenance and equipment replacement. This system of rates and charts is outlined in the "Service Plan for the Cherokee Metropolitan District".
Appendix A Cherokee Metropolitan District Report
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97-5
080.
The
Sou
rce
Wat
er A
sses
smen
t Rep
ort p
rovi
des
a sc
reen
ing-
leve
l eva
luat
ion
of p
oten
tial
co
ntam
inat
ion
that
cou
ld o
ccur
. It d
oes n
ot m
ean
that
the
cont
amin
atio
n ha
s or w
ill o
ccur
. We
can
use
this
info
rmat
ion
to e
valu
ate
the
need
to im
prov
e ou
r cu
rren
t wat
er
trea
tmen
t cap
abil
itie
s an
d pr
epar
e fo
r fu
ture
con
tam
inat
ion
thre
ats.
Thi
s ca
n he
lp u
s en
sure
that
qua
lity
fin
ishe
d w
ater
is d
eliv
ered
to y
our
hom
es. I
n ad
diti
on, t
he s
ourc
e w
ater
as
sess
men
t res
ults
pro
vide
a s
tart
ing
poin
t for
dev
elop
ing
a so
urce
wat
er p
rote
ctio
n pl
an.
Pot
enti
al s
ourc
es o
f co
ntam
inat
ion
in o
ur s
ourc
e w
ater
are
a ar
e li
sted
on
the
next
pag
e.
Ple
ase
cont
act u
s to
lear
n m
ore
abou
t wha
t you
can
do
to h
elp
prot
ect y
our
drin
king
wat
er s
ourc
es, a
ny q
uest
ions
abo
ut th
e D
rink
ing
Wat
er Q
uali
ty R
epor
t, to
lear
n m
ore
abou
t ou
r sy
stem
, or
to a
tten
d sc
hedu
led
publ
ic m
eeti
ngs.
We
wan
t you
, our
val
ued
cust
omer
s, to
be
info
rmed
abo
ut th
e se
rvic
es w
e pr
ovid
e an
d th
e qu
alit
y w
ater
we
deli
ver
to y
ou
ever
y da
y.
Ou
r W
ater
Sou
rces
Sou
rce
Sou
rce
Typ
e W
ater
Typ
e P
oten
tial
Sou
rce(
s) o
f C
onta
min
atio
n
WE
LL
S 1
TH
RO
UG
H 1
3 W
ell
Gro
undw
ater
R
ow c
rops
, fal
low
, sm
all g
rain
s, p
astu
re/h
ay,
sept
ic s
yste
ms,
roa
d m
iles
WE
LL
S 1
5 T
HR
OU
GH
20
Wel
l G
roun
dwat
er
WE
LL
21
AR
-1
Wel
l G
roun
dwat
er
WE
LL
22
DN
-4
Wel
l G
roun
dwat
er
CH
ER
OK
EE
MD
, PW
S ID
: CO
0121
125
2
018
CC
R P
age
3 of
7
Ter
ms
and
Ab
bre
viat
ions
M
axim
um
Con
tam
inan
t L
evel
(M
CL
) −
The
hig
hest
leve
l of
a co
ntam
inan
t all
owed
in d
rink
ing
wat
er.
T
reat
men
t T
ech
niq
ue
(TT
) −
A r
equi
red
proc
ess
inte
nded
to r
educ
e th
e le
vel o
f a
cont
amin
ant i
n dr
inki
ng w
ater
.
H
ealt
h-B
ased
− A
vio
lati
on o
f ei
ther
a M
CL
or
TT
.
N
on-H
ealt
h-B
ased
− A
vio
lati
on th
at is
not
a M
CL
or
TT
.
A
ctio
n L
evel
(A
L) −
The
conc
entra
tion
of a
con
tam
inan
t whi
ch, i
f exc
eede
d, tr
igge
rs tr
eatm
ent a
nd o
ther
reg
ulat
ory
requ
irem
ents
.
M
axim
um
Res
idu
al D
isin
fect
ant
Lev
el (
MR
DL
) −
The
high
est l
evel
of a
dis
infe
ctan
t allo
wed
in d
rinki
ng w
ater
. The
re is
con
vinc
ing
evid
ence
that
add
ition
of a
di
sinf
ecta
nt is
nec
essa
ry f
or c
ontr
ol o
f m
icro
bial
con
tam
inan
ts.
M
axim
um
Con
tam
inan
t L
evel
Goa
l (M
CL
G) −
The
leve
l of
a co
ntam
inan
t in
drin
king
wat
er b
elow
whi
ch th
ere
is n
o kn
own
or e
xpec
ted
risk
to h
ealt
h. M
CL
Gs
allo
w
for
a m
argi
n of
saf
ety.
M
axim
um
Res
idu
al D
isin
fect
ant
Lev
el G
oal (
MR
DL
G) −
The
leve
l of a
drin
king
wat
er d
isin
fect
ant,
belo
w w
hich
ther
e is
no
know
n or
exp
ecte
d ris
k to
hea
lth.
M
RD
LG
s do
not
ref
lect
the
bene
fits
of
the
use
of d
isin
fect
ants
to c
ontr
ol m
icro
bial
con
tam
inan
ts.
V
iola
tion
(N
o A
bb
revi
atio
n) −
Fai
lure
to m
eet a
Col
orad
o P
rim
ary
Dri
nkin
g W
ater
Reg
ulat
ion.
F
orm
al E
nfo
rcem
ent
Act
ion
(N
o A
bb
revi
atio
n) −
Esc
alat
ed a
ctio
n ta
ken
by th
e S
tate
(du
e to
the
risk
to p
ubli
c he
alth
, or
num
ber
or s
ever
ity
of v
iola
tion
s) to
bri
ng a
no
n-co
mpl
iant
wat
er s
yste
m b
ack
into
com
plia
nce.
V
aria
nce
an
d E
xem
pti
ons
(V/E
) −
Dep
artm
ent p
erm
issi
on n
ot to
mee
t a M
CL
or
trea
tmen
t tec
hniq
ue u
nder
cer
tain
con
diti
ons.
G
ross
Alp
ha
(No
Ab
bre
viat
ion
) −
Gro
ss a
lpha
par
ticl
e ac
tivi
ty c
ompl
ianc
e va
lue.
It i
nclu
des
radi
um-2
26, b
ut e
xclu
des
rado
n 22
2, a
nd u
rani
um.
P
icoc
uri
es p
er li
ter
(pC
i/L
) −
Mea
sure
of
the
radi
oact
ivit
y in
wat
er.
N
eph
elom
etri
c T
urb
idit
y U
nit
(N
TU
) −
Mea
sure
of
the
clar
ity
or c
loud
ines
s of
wat
er. T
urbi
dity
in e
xces
s of
5 N
TU
is ju
st n
otic
eabl
e to
the
typi
cal p
erso
n.
C
omp
lian
ce V
alu
e (N
o A
bb
revi
atio
n)
– S
ingl
e or
cal
cula
ted
valu
e us
ed to
det
erm
ine
if r
egul
ator
y co
ntam
inan
t lev
el (
e.g.
MC
L)
is m
et. E
xam
ples
of
calc
ulat
ed v
alue
s ar
e th
e 90
th P
erce
ntil
e, R
unni
ng A
nnua
l Ave
rage
(R
AA
) an
d L
ocat
iona
l Run
ning
Ann
ual A
vera
ge (
LR
AA
).
A
vera
ge (
x-b
ar) −
Typi
cal v
alue
.
R
ange
(R
) −
Low
est v
alue
to th
e hi
ghes
t val
ue.
S
amp
le S
ize
(n) −
Num
ber
or c
ount
of
valu
es (
i.e. n
umbe
r of
wat
er s
ampl
es c
olle
cted
).
P
arts
per
mil
lion
= M
illi
gram
s p
er li
ter
(pp
m =
mg/
L) −
One
par
t per
mill
ion
corr
espo
nds t
o on
e m
inut
e in
two
year
s or
a s
ingl
e pe
nny
in $
10,0
00.
P
arts
per
bil
lion
= M
icro
gram
s p
er li
ter
(pp
b =
ug/
L) −
One
par
t per
bill
ion
corr
espo
nds t
o on
e m
inut
e in
2,0
00 y
ears
, or a
sin
gle
penn
y in
$10
,000
,000
.
N
ot A
pp
lica
ble
(N
/A)
– D
oes
not a
pply
or
not a
vail
able
.
L
evel
1 A
sses
smen
t –
A s
tudy
of
the
wat
er s
yste
m to
iden
tify
pot
enti
al p
robl
ems
and
dete
rmin
e (i
f po
ssib
le)
why
tota
l col
ifor
m b
acte
ria
have
bee
n fo
und
in o
ur w
ater
sys
tem
.
L
evel
2 A
sses
smen
t –
A v
ery
deta
iled
stu
dy o
f th
e w
ater
sys
tem
to id
entif
y po
tent
ial p
robl
ems
and
dete
rmin
e (i
f po
ssib
le)
why
an
E. c
oli M
CL
vio
lati
on h
as o
ccur
red
and/
or
why
tota
l col
ifor
m b
acte
ria
have
bee
n fo
und
in o
ur w
ater
sys
tem
on
mul
tipl
e oc
casi
ons.
CH
ER
OK
EE
MD
, PW
S ID
: CO
0121
125
2
018
CC
R P
age
4 of
7
Det
ecte
d C
onta
min
ants
CH
ER
OK
EE
MD
rou
tine
ly m
onit
ors
for
cont
amin
ants
in y
our
drin
king
wat
er a
ccor
ding
to F
eder
al a
nd S
tate
law
s. T
he f
ollo
win
g ta
ble(
s) s
how
all
det
ecti
ons
foun
d in
the
peri
od
of J
anua
ry 1
to D
ecem
ber
31, 2
017
unle
ss o
ther
wis
e no
ted.
The
Sta
te o
f C
olor
ado
requ
ires
us
to m
onit
or f
or c
erta
in c
onta
min
ants
less
than
onc
e pe
r ye
ar b
ecau
se th
e co
ncen
trat
ions
of
thes
e co
ntam
inan
ts a
re n
ot e
xpec
ted
to v
ary
sign
ific
antl
y fr
om y
ear
to y
ear,
or
the
syst
em is
not
con
side
red
vuln
erab
le to
this
type
of
cont
amin
atio
n. T
here
fore
, so
me
of o
ur d
ata,
thou
gh r
epre
sent
ativ
e, m
ay b
e m
ore
than
one
yea
r ol
d. V
iola
tion
s an
d F
orm
al E
nfor
cem
ent A
ctio
ns, i
f an
y, a
re r
epor
ted
in th
e ne
xt s
ecti
on o
f th
is r
epor
t. N
ote:
Onl
y de
tect
ed c
onta
min
ants
sam
pled
wit
hin
the
last
5 y
ears
app
ear
in th
is r
epor
t. If
no
tabl
es a
ppea
r in
this
sec
tion
then
no
cont
amin
ants
wer
e de
tect
ed in
the
last
rou
nd o
f m
onit
orin
g.
Dis
infe
ctan
ts S
amp
led
in t
he
Dis
trib
uti
on S
yste
m
TT
Req
uire
men
t: A
t lea
st 9
5% o
f sa
mpl
es p
er p
erio
d (m
onth
or
quar
ter)
mus
t be
at le
ast 0
.2 p
pm O
R If
sam
ple
size
is le
ss th
an 4
0 no
mor
e th
an 1
sam
ple
is b
elow
0.2
ppm
T
ypic
al S
ourc
es:
Wat
er a
ddit
ive
used
to c
ontr
ol m
icro
bes
Dis
infe
ctan
t N
ame
Tim
e P
erio
d
Res
ults
N
um
ber
of
Sam
ple
s B
elow
Lev
el
Sam
ple
Siz
e T
T
Vio
lati
on
MR
DL
Chl
orin
e 01
/01/
2017
to 1
2/31
/201
7 L
owes
t per
iod
perc
enta
ge o
f sa
mpl
es m
eeti
ng
TT
req
uire
men
t: 9
6%
0 25
5 N
o 4.
0 pp
m
Lea
d a
nd
Cop
per
Sam
ple
d in
th
e D
istr
ibu
tion
Sys
tem
Con
tam
inan
t N
ame
Tim
e P
erio
d
90th
Per
cent
ile
S
ampl
e S
ize
Uni
t of
M
easu
re
90th
P
erce
ntile
A
L
Sam
ple
Sit
es
Abo
ve A
L
90th
Per
cent
ile
AL
E
xcee
dan
ce
Typ
ical
Sou
rces
Cop
per
06/1
3/20
17 to
06
/15/
2017
0.
42
30
ppm
1.
3 0
No
Cor
rosi
on o
f ho
useh
old
plum
bing
sys
tem
s; E
rosi
on o
f na
tura
l dep
osit
s
Lea
d 06
/13/
2017
to
06/1
5/20
17
4 30
pp
b 15
2
No
Cor
rosi
on o
f ho
useh
old
plum
bing
sys
tem
s; E
rosi
on o
f na
tura
l dep
osit
s
CH
ER
OK
EE
MD
, PW
S ID
: CO
0121
125
2
018
CC
R P
age
5 of
7
Dis
infe
ctio
n B
ypro
du
cts
Sam
ple
d in
th
e D
istr
ibu
tion
Sys
tem
Nam
e Y
ear
Ave
rage
R
ange
L
ow –
Hig
h S
ampl
e S
ize
Uni
t of
M
easu
re
MC
L
MC
LG
H
ighe
st
Com
pli
ance
V
alu
e
MC
L
Vio
lati
on
Typ
ical
Sou
rces
Tot
al H
aloa
ceti
c A
cids
(H
AA
5)
2017
4.
46
0 to
8.5
16
pp
b 60
N
/A
8.5
No
Byp
rodu
ct o
f dr
inki
ng
wat
er d
isin
fect
ion
Tot
al T
riha
lom
etha
nes
(TT
HM
) 20
17
19.0
3 5.
6 to
34.
5 16
pp
b 80
N
/A
34.5
N
o B
ypro
duct
of
drin
king
w
ater
dis
infe
ctio
n
R
adio
nu
clid
es S
amp
led
at
the
En
try
Poi
nt
to t
he
Dis
trib
uti
on S
yste
m
Typ
ical
Sou
rces
Y
ear
Ave
rage
R
ange
L
ow –
Hig
h S
ampl
e S
ize
Uni
t of
M
easu
re
MC
L
MC
LG
M
CL
V
iola
tion
Gro
ss A
lpha
20
17
1.1
1.1
to 1
.1
1 pC
i/L
15
0
No
Ero
sion
of
natu
ral d
epos
its
Com
bine
d R
adiu
m
2017
3.
4 3.
4 to
3.4
1
pCi/
L
5 0
No
Ero
sion
of
natu
ral d
epos
its
Gro
ss B
eta
Par
ticl
e A
ctiv
ity
2016
0.
1 0.
1 to
0.1
1
pCi/
L*
50
0 N
o D
ecay
of
natu
ral a
nd m
an-m
ade
depo
sits
*The
MC
L f
or G
ross
Bet
a P
arti
cle
Act
ivit
y is
4 m
rem
/yea
r. S
ince
ther
e is
no
sim
ple
conv
ersi
on b
etw
een
mre
m/y
ear
and
pCi/
L E
PA
con
side
rs 5
0 pC
i/L
to b
e th
e le
vel o
f co
ncer
n fo
r G
ross
Bet
a P
arti
cle
Act
ivit
y.
CH
ER
OK
EE
MD
, PW
S ID
: CO
0121
125
2
018
CC
R P
age
6 of
7
Inor
gan
ic C
onta
min
ants
Sam
ple
d a
t th
e E
ntr
y P
oin
t to
th
e D
istr
ibu
tion
Sys
tem
Con
tam
inan
t N
ame
Yea
r A
vera
ge
Ran
ge
Low
– H
igh
Sam
ple
Siz
e U
nit
of
Mea
sure
M
CL
M
CL
G
MC
L
Vio
lati
on
Typ
ical
Sou
rces
Ars
enic
20
17
0.33
0
to 2
6
ppb
10
0 N
o E
rosi
on o
f na
tura
l dep
osit
s; r
unof
f fr
om
orch
ards
; run
off
from
gla
ss a
nd e
lect
roni
cs
prod
uctio
n w
aste
s
Bar
ium
20
17
0.06
0.
04 to
0.0
7 6
ppm
2
2 N
o D
isch
arge
of
dril
ling
was
tes;
dis
char
ge f
rom
m
etal
ref
iner
ies;
ero
sion
of
natu
ral d
epos
its
Flu
orid
e 20
17
0.74
0.
31 to
1.6
3
ppm
4
4 N
o E
rosi
on o
f na
tura
l dep
osit
s; w
ater
add
itiv
e w
hich
pr
omot
es s
tron
g te
eth;
dis
char
ge f
rom
fer
tili
zer
and
alum
inum
fac
tori
es
Nit
rate
20
17
6.94
0
to 9
.3
9 pp
m
10
10
No
Run
off
from
fer
tili
zer
use;
leac
hing
fro
m s
epti
c ta
nks,
sew
age;
ero
sion
of
natu
ral d
epos
its
Sel
eniu
m
2017
4.
33
0 to
8
6 pp
b 50
50
N
o D
isch
arge
fro
m p
etro
leum
and
met
al r
efin
erie
s;
eros
ion
of n
atur
al d
epos
its; d
isch
arge
fro
m m
ines
Nit
rate
: Nitr
ate
in d
rink
ing
wat
er a
t lev
els a
bove
10
ppm
is a
hea
lth
risk
for
infa
nts
of le
ss th
an s
ix m
onth
s of
age
. Hig
h ni
trat
e le
vels
in d
rink
ing
wat
er c
an c
ause
blu
e ba
by
synd
rom
e. N
itra
te le
vels
may
ris
e qu
ickl
y fo
r sh
ort p
erio
ds o
f tim
e be
caus
e of
rai
nfal
l or
agri
cult
ural
act
ivit
y. I
f yo
u ar
e ca
ring
for
an
infa
nt y
ou s
houl
d as
k ad
vice
fro
m y
our
heal
th
care
pro
vide
r.
Sec
ond
ary
Con
tam
inan
ts**
**
Sec
onda
ry s
tand
ards
are
non
-enf
orce
able
gui
deli
nes
for
cont
amin
ants
that
may
cau
se c
osm
etic
eff
ects
(su
ch a
s sk
in, o
r to
oth
disc
olor
atio
n) o
r ae
sthe
tic
effe
cts
(suc
h as
tast
e, o
dor,
or
colo
r) in
dri
nkin
g w
ater
.
Con
tam
inan
t N
ame
Yea
r A
vera
ge
Ran
ge
Low
– H
igh
Sam
ple
Siz
e U
nit
of M
easu
re
Sec
ond
ary
Sta
nda
rd
Sod
ium
20
17
49.8
2 21
.1 to
73.
2 6
ppm
N
/A
Tot
al D
isso
lved
Sol
ids
2017
33
7.7
248
- 47
2 16
pp
m
500
CH
ER
OK
EE
MD
, PW
S ID
: CO
0121
125
2
018
CC
R P
age
7 of
7
Vio
lati
ons,
Sig
nif
ican
t D
efic
ien
cies
, Bac
kflo
w/C
ross
-Con
nec
tion
, an
d F
orm
al E
nfo
rcem
ent
Act
ions
Vio
lati
ons
Nam
e C
ateg
ory
Tim
e P
erio
d
Hea
lth
Eff
ects
C
omp
lian
ce
Val
ue
TT
Lev
el o
r M
CL
CR
OS
S C
ON
NE
CT
ION
RU
LE
F
AIL
UR
E T
O M
EE
T C
RO
SS
C
ON
NE
CT
ION
/BA
CK
FL
OW
R
EQ
UIR
EM
EN
TS
- H
EA
LT
H-
BA
SE
D
01/0
1/20
17 -
06/
12/2
017
May
pos
e a
risk
to p
ubli
c he
alth
. N
/A
N/A
Ad
dit
ion
al V
iola
tion
Inf
orm
atio
n
*Ple
ase
shar
e th
is in
form
atio
n w
ith
all t
he o
ther
peo
ple
who
dri
nk th
is w
ater
, esp
ecia
lly
thos
e w
ho m
ay n
ot h
ave
rece
ived
this
not
ice
dire
ctly
(fo
r ex
ampl
e, p
eopl
e in
apa
rtm
ents
, nur
sing
ho
mes
, sch
ools
, and
bus
ines
ses)
. You
can
do
this
by
post
ing
this
not
ice
in a
pub
lic
plac
e or
dis
trib
utin
g co
pies
by
hand
or
mai
l.*
Exp
lana
tion
of
the
viol
atio
n(s)
, the
ste
ps ta
ken
to r
esol
ve th
em, a
nd th
e an
tici
pate
d re
solv
ed d
ate:
Bac
kflo
w a
nd
Cro
ss-C
onn
ecti
on
Che
roke
e M
etro
poli
tan
Dis
tric
t had
an
inad
equa
te b
ackf
low
pre
vent
ion
and
cros
s-co
nnec
tion
con
trol
pro
gram
in 2
016
and
fail
ed to
mee
t the
spe
cifi
ed p
erce
ntag
e of
bac
kflo
w
devi
ce te
stin
g re
quir
ed b
y th
e C
olor
ado
Dep
artm
ent o
f P
ubli
c H
ealt
h an
d E
nvir
onm
ent.
The
Dis
tric
t is
curr
entl
y in
com
plia
nce
wit
h th
e C
ross
Con
nect
ion
Rul
e. U
ncon
trol
led
cros
s co
nnec
tion
s ca
n le
ad to
inad
vert
ent c
onta
min
atio
n of
the
drin
king
wat
er.
Appendix B
Cherokee Metropolitan District letter of commitment
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