APPENDIX A dividers - California Public Utilities … Home-Shop Home-Other Commute Non-Work Customer...
56
APPENDIX A Air Quality Data
Transcript of APPENDIX A dividers - California Public Utilities … Home-Shop Home-Other Commute Non-Work Customer...
APPENDIX A Air Quality Data
APPENDIX A-1 URBEMIS2007 Output – Operational Worker
Trips
Prepared by Impact Sciences, Inc. August 2008
INTENTIONALLY LEFT BLANK
8/9/
2008
8:1
2:04
PM
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Wor
ker
Trip
s.ur
b924
Pro
ject
Nam
e: S
NG
S -
Wor
ker
Trip
s
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d S
umm
er E
mis
sion
s R
epor
ts (
Pou
nds/
Day
)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.13
0.04
0.82
0.00
0.11
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.13
0.04
0.82
0.00
0.11
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
Sum
mar
y R
epor
t:
8/9/
2008
8:1
2:04
PM
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Sum
mer
Pou
nds
Per
Day
, Unm
itiga
ted
Gen
eral
hea
vy in
dust
ry0.
130.
040.
820.
000.
11
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.13
0.04
0.82
0.00
0.11
Sou
rce
RO
GN
OX
CO
SO
2P
M10
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Ligh
t Tru
ck <
375
0 lb
s12
.54.
088
.08.
0
Ligh
t Aut
o59
.51.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
00.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
0.0
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
0.0
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
28.0
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Gen
eral
hea
vy in
dust
ry1.
5010
00 s
q ft
4.00
6.00
62.7
0
6.00
62.7
0
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
Ana
lysi
s Y
ear:
200
9 T
empe
ratu
re (
F):
95
Sea
son:
Sum
mer
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
8/9/
2008
8:1
2:04
PM
Pag
e: 3
% o
f Trip
s -
Res
iden
tial
100.
00.
00.
0
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Gen
eral
hea
vy in
dust
ry90
.05.
05.
0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Urb
an B
us0.
00.
00.
00.
0
Mot
or H
ome
0.0
11.1
77.8
11.1
Sch
ool B
us0.
00.
00.
010
0.0
Mot
orcy
cle
0.0
71.4
28.6
0.0
Oth
er B
us0.
00.
00.
010
0.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s0.
06.
218
.875
.0
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.0
0.0
20.0
80.0
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Pag
e: 1
8/9/
2008
08:
13:0
3 P
MU
rbem
is 2
007
Ver
sion
9.2
.4
Com
bine
d W
inte
r Em
issi
ons
Rep
orts
(Pou
nds/
Day
)
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Wor
ker T
rips.
urb9
24
Pro
ject
Nam
e: S
NG
S -
Wor
ker T
rips
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OFF
RO
AD
2007
Sum
mar
y R
epor
t:
RO
GN
Ox
CO
SO
2P
M10
OP
ER
ATI
ON
AL
(VE
HIC
LE) E
MIS
SIO
N E
STI
MA
TES
TOTA
LS (l
bs/d
ay, u
nmiti
gate
d)0.
060.
070.
640.
000.
11
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
ATI
ON
AL
EM
ISS
ION
ES
TIM
ATE
S
RO
GN
Ox
CO
SO
2P
M10
TOTA
LS (l
bs/d
ay, u
nmiti
gate
d)0.
060.
070.
640.
000.
11
Pag
e: 2
8/9/
2008
08:
13:0
3 P
M
Sou
rce
Gen
eral
hea
vy in
dust
ryTO
TALS
(lbs
/day
, unm
itiga
ted)
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
OP
ER
ATI
ON
AL
EM
ISS
ION
ES
TIM
ATE
S W
inte
r Pou
nds
Per
Day
, Unm
itiga
ted
RO
GN
OX
CO
SO
2P
M10
0.06
0.07
0.64
0.00
0.11
0.06
0.07
0.64
0.00
0.11
Ope
ratio
nal S
ettin
gs:
Doe
s no
t inc
lude
cor
rect
ion
for p
assb
y tri
ps
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ana
lysi
s Y
ear:
2009
Tem
pera
ture
(F):
50 S
easo
n: W
inte
r
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geTr
ip R
ate
Uni
t Typ
eN
o. U
nits
Tota
l Trip
sTo
tal V
MT
Gen
eral
hea
vy in
dust
ry1.
5010
00 s
q ft
4.00
6.00
62.7
0
6.00
62.7
0
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
0.4
Ligh
t Tru
ck <
375
0 lb
s12
.54.
088
.08.
0
Ligh
t Aut
o59
.51.
797
.9
0.4
Med
Tru
ck 5
751-
8500
lbs
0.0
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
28.0
0.9
98.7
23.8
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
00.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
0.0
0.0
76.2
Pag
e: 3
8/9/
2008
08:
13:0
3 P
M75
.0
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.0
0.0
20.0
80.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s0.
06.
218
.8
100.
0
Urb
an B
us0.
00.
00.
00.
0
Oth
er B
us0.
00.
00.
0
0.0
Sch
ool B
us0.
00.
00.
010
0.0
Mot
orcy
cle
0.0
71.4
28.6
11.1
Trav
el C
ondi
tions
Res
iden
tial
Com
mer
cial
Mot
or H
ome
0.0
11.1
77.8
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
% o
f Trip
s - R
esid
entia
l10
0.0
0.0
0.0
% o
f Trip
s - C
omm
erci
al (b
y la
nd u
se)
Gen
eral
hea
vy in
dust
ry90
.05.
05.
0
APPENDIX A-2 URBEMIS2007 Output – Operational Emissions
under Current Zoning
Prepared by Impact Sciences, Inc. August 2008
INTENTIONALLY LEFT BLANK
8/9/
2008
4:5
8:00
PM
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Exi
stin
g Z
onin
g F
AR
025
.urb
924
Pro
ject
Nam
e: E
xist
ing
Zon
ing
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d S
umm
er E
mis
sion
s R
epor
ts (
Pou
nds/
Day
)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
5.03
5.00
53.9
50.
045.
72
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
4.52
4.18
51.6
80.
045.
72
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.51
0.82
2.27
0.00
0.00
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
Sum
mar
y R
epor
t:
8/9/
2008
4:5
8:00
PM
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Sum
mer
Pou
nds
Per
Day
, Unm
itiga
ted
Indu
stria
l par
k4.
524.
1851
.68
0.04
5.72
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
4.52
4.18
51.6
80.
045.
72
Sou
rce
RO
GN
OX
CO
SO
2P
M10
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Arc
hite
ctur
al C
oatin
gs0.
32
Con
sum
er P
rodu
cts
Hea
rth
Land
scap
e0.
130.
021.
600.
000.
00
Nat
ural
Gas
0.06
0.80
0.67
0.00
0.00
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.51
0.82
2.27
0.00
0.00
Sou
rce
RO
GN
Ox
CO
SO
2P
M10
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
Sum
mer
Pou
nds
Per
Day
, Unm
itiga
ted
Are
a S
ourc
e U
nmiti
gate
d D
etai
l Rep
ort:
Ana
lysi
s Y
ear:
200
9 T
empe
ratu
re (
F):
95
Sea
son:
Sum
mer
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
Are
a S
ourc
e C
hang
es to
Def
aults
8/9/
2008
4:5
8:00
PM
Pag
e: 3
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.5
0.0
20.0
80.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s1.
66.
218
.875
.0
Mot
or H
ome
0.9
11.1
77.8
11.1
Oth
er B
us0.
10.
00.
010
0.0
Sch
ool B
us0.
10.
00.
010
0.0
Mot
orcy
cle
3.5
71.4
28.6
0.0
Urb
an B
us0.
00.
00.
00.
0
Ligh
t Tru
ck <
375
0 lb
s10
.04.
088
.08.
0
Ligh
t Aut
o47
.71.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
90.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
2.1
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
10.1
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
22.5
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Indu
stria
l par
k6.
9610
00 s
q ft
54.4
537
8.97
3,31
6.95
378.
973,
316.
95
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
8/9/
2008
4:5
8:00
PM
Pag
e: 4
% o
f Trip
s -
Res
iden
tial
32.9
18.0
49.1
Indu
stria
l par
k41
.520
.837
.8
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
8/9/
2008
4:5
9:01
PM
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Exi
stin
g Z
onin
g F
AR
025
.urb
924
Pro
ject
Nam
e: E
xist
ing
Zon
ing
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d W
inte
r E
mis
sion
s R
epor
ts (
Pou
nds/
Day
)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
4.30
7.10
44.8
80.
035.
72
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
3.92
6.30
44.2
10.
035.
72
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.38
0.80
0.67
0.00
0.00
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
Sum
mar
y R
epor
t:
8/9/
2008
4:5
9:01
PM
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Win
ter
Pou
nds
Per
Day
, Unm
itiga
ted
Indu
stria
l par
k3.
926.
3044
.21
0.03
5.72
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
3.92
6.30
44.2
10.
035.
72
Sou
rce
RO
GN
OX
CO
SO
2P
M10
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Arc
hite
ctur
al C
oatin
gs0.
32
Con
sum
er P
rodu
cts
Hea
rth
Land
scap
ing
- N
o W
inte
r E
mis
sion
s
Nat
ural
Gas
0.06
0.80
0.67
0.00
0.00
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.38
0.80
0.67
0.00
0.00
Sou
rce
RO
GN
Ox
CO
SO
2P
M10
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
Win
ter
Pou
nds
Per
Day
, Unm
itiga
ted
Are
a S
ourc
e U
nmiti
gate
d D
etai
l Rep
ort:
Ana
lysi
s Y
ear:
200
9 T
empe
ratu
re (
F):
50
Sea
son:
Win
ter
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
Are
a S
ourc
e C
hang
es to
Def
aults
8/9/
2008
4:5
9:01
PM
Pag
e: 3
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.5
0.0
20.0
80.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s1.
66.
218
.875
.0
Mot
or H
ome
0.9
11.1
77.8
11.1
Oth
er B
us0.
10.
00.
010
0.0
Sch
ool B
us0.
10.
00.
010
0.0
Mot
orcy
cle
3.5
71.4
28.6
0.0
Urb
an B
us0.
00.
00.
00.
0
Ligh
t Tru
ck <
375
0 lb
s10
.04.
088
.08.
0
Ligh
t Aut
o47
.71.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
90.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
2.1
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
10.1
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
22.5
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Indu
stria
l par
k6.
9610
00 s
q ft
54.4
537
8.97
3,31
6.95
378.
973,
316.
95
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
8/9/
2008
4:5
9:01
PM
Pag
e: 4
% o
f Trip
s -
Res
iden
tial
32.9
18.0
49.1
Indu
stria
l par
k41
.520
.837
.8
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
8/9/
2008
4:5
3:24
PM
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Exi
stin
g Z
onin
g F
AR
050
.urb
924
Pro
ject
Nam
e: E
xist
ing
Zon
ing
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d S
umm
er E
mis
sion
s R
epor
ts (
Pou
nds/
Day
)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
9.88
9.18
105.
620.
0711
.44
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
9.05
8.36
103.
350.
0711
.44
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.83
0.82
2.27
0.00
0.00
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
Sum
mar
y R
epor
t:
8/9/
2008
4:5
3:24
PM
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Sum
mer
Pou
nds
Per
Day
, Unm
itiga
ted
Indu
stria
l par
k9.
058.
3610
3.35
0.07
11.4
4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
9.05
8.36
103.
350.
0711
.44
Sou
rce
RO
GN
OX
CO
SO
2P
M10
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Arc
hite
ctur
al C
oatin
gs0.
64
Con
sum
er P
rodu
cts
Hea
rth
Land
scap
e0.
130.
021.
600.
000.
00
Nat
ural
Gas
0.06
0.80
0.67
0.00
0.00
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.83
0.82
2.27
0.00
0.00
Sou
rce
RO
GN
Ox
CO
SO
2P
M10
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
Sum
mer
Pou
nds
Per
Day
, Unm
itiga
ted
Are
a S
ourc
e U
nmiti
gate
d D
etai
l Rep
ort:
Ana
lysi
s Y
ear:
200
9 T
empe
ratu
re (
F):
95
Sea
son:
Sum
mer
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
Are
a S
ourc
e C
hang
es to
Def
aults
8/9/
2008
4:5
3:24
PM
Pag
e: 3
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.5
0.0
20.0
80.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s1.
66.
218
.875
.0
Mot
or H
ome
0.9
11.1
77.8
11.1
Oth
er B
us0.
10.
00.
010
0.0
Sch
ool B
us0.
10.
00.
010
0.0
Mot
orcy
cle
3.5
71.4
28.6
0.0
Urb
an B
us0.
00.
00.
00.
0
Ligh
t Tru
ck <
375
0 lb
s10
.04.
088
.08.
0
Ligh
t Aut
o47
.71.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
90.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
2.1
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
10.1
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
22.5
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Indu
stria
l par
k6.
9610
00 s
q ft
108.
9075
7.94
6,63
3.91
757.
946,
633.
91
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
8/9/
2008
4:5
3:24
PM
Pag
e: 4
% o
f Trip
s -
Res
iden
tial
32.9
18.0
49.1
Indu
stria
l par
k41
.520
.837
.8
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
8/9/
2008
4:5
4:42
PM
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Exi
stin
g Z
onin
g F
AR
050
.urb
924
Pro
ject
Nam
e: E
xist
ing
Zon
ing
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d W
inte
r E
mis
sion
s R
epor
ts (
Pou
nds/
Day
)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
8.53
13.4
189
.09
0.06
11.4
4
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
7.83
12.6
188
.42
0.06
11.4
4
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.70
0.80
0.67
0.00
0.00
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
RO
GN
Ox
CO
SO
2P
M10
Sum
mar
y R
epor
t:
8/9/
2008
4:5
4:42
PM
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Win
ter
Pou
nds
Per
Day
, Unm
itiga
ted
Indu
stria
l par
k7.
8312
.61
88.4
20.
0611
.44
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
7.83
12.6
188
.42
0.06
11.4
4
Sou
rce
RO
GN
OX
CO
SO
2P
M10
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Arc
hite
ctur
al C
oatin
gs0.
64
Con
sum
er P
rodu
cts
Hea
rth
Land
scap
ing
- N
o W
inte
r E
mis
sion
s
Nat
ural
Gas
0.06
0.80
0.67
0.00
0.00
TO
TA
LS (
lbs/
day,
unm
itiga
ted)
0.70
0.80
0.67
0.00
0.00
Sou
rce
RO
GN
Ox
CO
SO
2P
M10
AR
EA
SO
UR
CE
EM
ISS
ION
ES
TIM
AT
ES
Win
ter
Pou
nds
Per
Day
, Unm
itiga
ted
Are
a S
ourc
e U
nmiti
gate
d D
etai
l Rep
ort:
Ana
lysi
s Y
ear:
200
9 T
empe
ratu
re (
F):
50
Sea
son:
Win
ter
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
Are
a S
ourc
e C
hang
es to
Def
aults
8/9/
2008
4:5
4:42
PM
Pag
e: 3
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.5
0.0
20.0
80.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s1.
66.
218
.875
.0
Mot
or H
ome
0.9
11.1
77.8
11.1
Oth
er B
us0.
10.
00.
010
0.0
Sch
ool B
us0.
10.
00.
010
0.0
Mot
orcy
cle
3.5
71.4
28.6
0.0
Urb
an B
us0.
00.
00.
00.
0
Ligh
t Tru
ck <
375
0 lb
s10
.04.
088
.08.
0
Ligh
t Aut
o47
.71.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
90.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
2.1
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
10.1
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
22.5
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Indu
stria
l par
k6.
9610
00 s
q ft
108.
9075
7.94
6,63
3.91
757.
946,
633.
91
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
8/9/
2008
4:5
4:42
PM
Pag
e: 4
% o
f Trip
s -
Res
iden
tial
32.9
18.0
49.1
Indu
stria
l par
k41
.520
.837
.8
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
APPENDIX A-3 Health Risk Screening Assessment
Prepared by Environ Corporation
March 2008
INTENTIONALLY LEFT BLANK
Marketplace Tower, 6001 Shellmound Street, Suite 700, Emeryville, CA 94608 Tel: 510. 655.7400 Fax: 510.655.9517
www.environcorp.com
March 25, 2008
Ms. Emily Keller Senior Scientist, Wetlands and Wildlife Biologist PBS&J 1200 Second Street Sacramento, CA 95814
RE: Health Risk Screening Analysis - Proposed Sacramento Natural Gas Storage Project, Florin Gas Field Facility
Dear Ms. Keller:
At the request of PBS&J, ENVIRON International Corporation (ENVIRON) performed an ambient air quality health risk screening analysis (HRSA) of the toxic air contaminant (TAC) emissions from a glycol dehydration unit associated with the Sacramento Natural Gas Storage Project at the Florin Gas Field (the “Project”) in Sacramento, California (the “Site”). Our analysis indicates that the proposed operations of the Project are not expected to have a significant human health risk impact as defined under Sacramento Metropolitan Air Quality Management District (SMAQMD) California Environmental Quality Act (CEQA) Guidelines.
Process
ENVIRON performed this HRSA using information obtained from PBS&J. This HRSA reflects the fact that we utilized conservative methodologies for:
1) the estimation of TAC emissions, 2) the calculation of screening-level airborne TAC concentrations at offsite receptors, and 3) the estimation of cancer risks and non-cancer hazards at these receptors.
Potential incremental health effects resulting from exposure to projected emissions of TAC associated with the Project were evaluated for hypothetical offsite workers and offsite residential receptors nearby the Site boundary. Two sensitive offsite receptors representing Still Water’s Academy and Elder Creek Elementary were also considered. ENVIRON evaluated potential exposures to TAC emission at these locations using conservative (i.e., health protective) exposure parameters consistent with the California Environmental Protection Agency (Cal/EPA) Office of Environmental Health Hazard Assessment (OEHHA) risk screening guidance.1
Using an established emission estimation model developed by the Gas Research Institute (GRI) for use in regulatory permitting projects (GRI-GLYCalc 4.0), ENVIRON estimated
1 California Environmental Protection Agency (Cal/EPA). 2003. The Air Toxics Hot Spots Program
Guidance Manual for Preparation of Health Risk Assessments. Office of Environmental Health Hazard Assessment. August.
Ms. Emily Keller - 2 - March 25, 2008 TAC emissions for the glycol dehydration unit. Parameters used for GRI-GLYCalc and emission estimates are shown in Table 1. GRI-GLYCalc estimates emissions of the BTEX compounds (i.e., benzene, toluene, ethyl benzene and xylenes) and n-hexane, all of which are considered TACs under OEHHA guidance.2
Consistent with SMAQMD-approved practices, TAC concentrations for estimated emissions at receptor locations were conservatively estimated using the United States Environmental Protection Agency (USEPA) air dispersion model SCREEN3, which represents worst-case scenario meteorological conditions. Parameters used in SCREEN3 modeling are shown in Table 2 and estimated one-hour maximum and annual average concentrations for BTEX and n-hexane are presented in Table 3. One-hour maximum concentrations estimated using SCREEN3 were converted to annual average concentrations using a conservative conversion factor of 0.1, per OEHHA guidance.3
Quantitative estimates of cancer risks and non-cancer health effects associated with potential offsite residential, offsite worker and offsite child exposure at nearby schools to TACs from the Project were then calculated based on the screening air dispersion modeling results. Exposure assumptions used in this analysis are presented in Table 4 and toxicity values are presented in Table 5. GRI-GLYCalc only estimates BTEX emissions as a composite, therefore all BTEX was assumed to be benzene as it has the highest toxicity of all BTEX compounds. This is a conservative assumption as BTEX emissions represent a mixture of compounds that have a composite toxicity lower than benzene.
As part of this HRSA, the estimated human health risks were compared to the thresholds for significance for TACs in the SMAQMD CEQA Guidelines for a maximally exposed individual (MEI). These results are shown in Table 6. The SMAQMD CEQA Guidelines thresholds correspond to the TAC concentration that would not pose an unacceptable health risk to offsite populations. According to the SMAQMD CEQA Guidelines, the threshold for significance for TACs is a cancer risk greater than ten in one million (1 x 10-5) and a non-cancer hazard index (HI) of greater than one for the MEI.4
Findings
The results of our analysis indicate that the estimated incremental cancer risks and non-cancer HIs for the offsite workers and offsite residents in the vicinity of Project and the offsite children at nearby schools are below the SMAQMD CEQA thresholds (i.e. an estimated cancer risk of less than ten in one million and an HI less than one), as summarized in Table 6. Thus, based on the results of this HRSA, the Project should not have a significant adverse impact on human health according to SMAQMD CEQA Guidelines.
2 Ibid. 3 Ibid. 4 Sacramento Metropolitan Air Quality Management District (SMAQMD). 2004. Guide to Air Quality
Assessment in Sacramento County. July.
Ms. Emily Keller - 3 - March 25, 2008 To provide perspective for the results of a HRSA, OEHHA indicates that the estimated cancer risks can be “compared to the overall risk of cancer in the general U.S. population” or “to the risk posed by all harmful chemicals in a particular medium, such as air. The cancer risk from breathing current levels of pollutants in California’s ambient air over a 70-year lifetime is estimated to be 760 in one million.”5 Furthermore, the California Department of Health Services (DHS) reports that two in five Californians will be diagnosed with cancer during their lifetime, corresponding to a background cancer risk of 400,000 in one million.6
The many conservative assumptions that have been used in this screening assessment regarding the identification of truck traffic routes and associated emissions, estimation of ambient air concentrations, and exposure assumptions likely lead to an overestimate of potential risks, the magnitude of which could likely be substantial. The USEPA explains the effect of using conservative parameters in regulatory risk assessments as follows: 7
“These values are upper-bound estimates of excess cancer risk potentially arising from lifetime exposure to the chemical in question. A number of assumptions have been made in the derivation of these values, many of which are likely to overestimate exposure and toxicity. The actual incidence of cancer is likely to be lower than these estimates and may be zero.”
Closing
Thank you for the opportunity to complete this assignment. If you have any questions about our analysis or need further information, please feel free to contact Liz Miesner at 415.796.1938 or [email protected] or Michael Keinath at 510.420.2539 or [email protected].
Sincerely,
Michael Keinath, P.E. Elizabeth A. Miesner, M.S. Manager Principal
5 Office of Environmental Health Hazard Assessment (OEHHA) 2001. A Guide to Health Risk Assessment.
California Environmental Protection Agency. 6 California Department of Health Services (DHS), California Cancer Registry. 2006. Available at
http://www.dhs.ca.gov/cdic. 7 USEPA. 1989. Risk Assessment Guidance for Superfund: Volume 1- Human Health Evaluation Manual
(Part A). Interim Final. Washington, D.C. December.
Ms. Emily Keller - 4 - March 25, 2008 Attachments:
Table 1: GRI-Glycalc 4.0 Inputs and Outputs
Table 2: SCREEN3 Modeling Parameters
Table 3: Summary of Receptor Concentrations
Table 4: OEHHA-Recommended Exposure Parameters for Evaluating Cancer Risk for Resident, Worker, and Child Receptors
Table 5: Inhalation Carcinogenic and Non-Carcinogenic Toxicity Values for Benzene and n-Hexane
Table 6: Summary of Carcinogenic Risks and Non-Cancer Hazard Indices
Inputs Units ValueAnnual Hours of Operation hours 3075.0Wet gas temperature degrees F 97.00Wet gas pressure psig 250.00Wet Gas Water Content Saturated Composition of the wet gas1
Methane volume % 99.97% n-Hexane volume % 0.03%
BTEX volume % <0.01%Dry Gas Flow Rate2 MMSCF / day 225-314Dry Gas Water Content lbs H2O / MMSCF 7.0Lean Glycol Type: TEG Lean Glycol Water Content: weight % H2O 1.0%Lean Glycol Recirculation Ratio: gallons/lb H2O 3.0Glycol Pump Type Electric/Pneumatic Flash Tank Control3 Vented to atmosphere Flash Tank Temperature: degrees F 200.0Flash Tank Pressure: psig 75.0
Output
Annual BTEX Emissions(at Average Dry Gas Flow Rate)
lbs/yr 976
Maximum Hourly BTEX Emissions(at Maximum Dry Gas Flow Rate)
lbs/hr 0.44
Annual n-Hexane Emissions(at Average Dry Gas Flow Rate) lbs/yr 9,614
Sacramento, CA
Table 1GRI-Glycalc 4.0 Inputs and Outputs
SNGS Florin Facility
Notes: 1. Client data specified BTEX concentrations <1 ppm. To be conservative, ENVIRON assumed a concentration of 1 ppm of BTEX. 2. The average flow rate is 225 MMSCF/day; the maximum flow rate is 314 MMSCF/day. 3. Assumed to be conservative.
Abbreviations: BTEX - benzene, toluene, ethyl benzene, xylenes F - Fahrenheit hr - hour lb(s) - pound(s) MMSCF - million standard cubic feet ppm - parts per million TEG - triethylene glycol yr - year % - percent
Source: Inputs provided by client.
E N V I R O N
Parameter Units ValueBTEX Emission Rate (1-hr maximum) 1 g/s 0.056BTEX Emission Rate (annual) 2 g/s 0.014n-Hexane Emission Rate (annual) 2 g/s 0.14Stack Height m 6.1Stack Diameter m 0.356Exit Velocity m/s 4.91Exit Temperature K 644
Air Temperature K 293
Table 2SCREEN3 Modeling Parameters
Sacramento, CASNGS Florin Facility
Notes: 1. 1-hour maximum emission rate = hourly emissions (lbs/hr)*453.59 g/lb / (3600 s/hr) 2. Annual emission rate = annual emissions (lbs/yr)*453.59 g/lb / (8760 hr/yr * 3600 s/hr)
Abbreviations: BTEX - benzene, toluene, ethyl benzene, xylenes g - gram hr - hour K - Kelvin lb - pound m - meter s - second yr - year
E N V I R O N
BT
EX
1-H
our
Max
imum
C
once
ntra
tion1
BT
EX
Ann
ual A
vera
ge
Con
cent
ratio
n2n-
Hex
ane
Ann
ual A
vera
ge
Con
cent
ratio
n2
ug/m
3ug
/m3
ug/m
3
PMI
92 m
eter
s fro
m so
urce
180.
444.
4
ME
IW
Nea
rest
off
site
wor
ker i
dent
ified
at 1
50 m
eter
s nor
th o
r eas
t of s
ourc
e17
0.42
4.1
ME
IR
Nea
rest
resi
denc
e id
entif
ied
800
met
ers w
est o
f sou
rce
7.7
0.19
1.9
Still
Wat
er's
Aca
dem
y80
08 4
3rd
Ave
. (90
0 m
eter
s wes
t of s
ourc
e)6.
80.
171.
7
Eld
er C
reek
Ele
men
tary
7934
Lem
on H
ill A
ve. (
900
met
ers w
est o
f sou
rce)
6.8
0.17
1.7
Sacr
amen
to, C
A
Loc
atio
nR
ecep
tor
Tab
le 3
Sum
mar
y of
Rec
epto
r C
once
ntra
tions
SNG
S Fl
orin
Fac
ility
Not
es:
1. E
stim
ated
dire
ctly
usi
ng S
CR
EEN
3 w
ith th
e m
axim
um h
ourly
em
issi
on ra
te o
f BTE
X u
nder
the
max
imum
dry
gas
flow
rate
of 3
14 M
MSC
F/da
y. 2
. Est
imat
ed u
sing
SC
REE
N3
to e
stim
ate
a 1-
hour
max
imum
con
cent
ratio
n fo
r the
em
issi
ons o
f BTE
X a
nd n
-hex
ane
unde
r the
ave
rage
dry
gas
flow
rate
of 2
25 M
MSC
F/da
y an
d th
en sc
alin
g th
e 1-
hour
max
imum
co
ncen
tratio
n to
an
annu
al c
once
ntra
tion
usin
g th
e fa
ctor
0.1
, as r
ecom
men
ded
by O
EHH
A g
uida
nce.
Abb
revi
atio
ns:
BTE
X -
benz
ene,
tolu
ene,
eth
yl b
enze
ne, x
ylen
es M
EIR
- M
axim
ally
Exp
osed
Indi
vidu
al R
esid
ent
MEI
W -
Max
imal
ly E
xpos
ed In
divi
dual
Wor
ker
MM
SCF
- mill
ion
stan
dard
cub
ic fe
et O
EHH
A -
Off
ice
of E
nviro
nmen
tal H
ealth
Haz
ard
Ass
essm
ent
PM
I - P
oint
of M
axim
um Im
pact
ug/
m3 -
mic
rogr
am p
er c
ubic
met
er
Sour
ce:
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2003
. "A
ir To
xics
Hot
Spo
ts P
rogr
am R
isk
Ass
essm
ent G
uide
lines
, the
Air
Toxi
cs H
ot S
pots
Pro
gram
Gui
danc
e M
anua
l for
Pre
para
tions
of H
ealth
Ris
k A
sses
smen
ts,"
Off
ice
of E
nviro
nmen
tal H
ealth
Haz
ard
Ass
essm
ent,
Aug
ust.
E N
V I
R O
N
Exp
osur
e Pa
ram
eter
Uni
tsR
esid
ent
Wor
ker
Chi
ld
Dai
ly B
reat
hing
Rat
e 1[L
/kg-
day]
302
149
581
Expo
sure
Tim
e[h
ours
/day
]24
88
Expo
sure
Fre
quen
cy[d
ays/
year
]35
024
518
0Ex
posu
re D
urat
ion
[yea
rs]
7040
9C
onve
rsio
n Fa
ctor
(CF)
[m3 /L
]0.
001
0.00
10.
001
Ave
ragi
ng T
ime
[day
s]25
550
2555
025
550
Inta
ke F
acto
r, In
hala
tion
(IF i
nh)2
[m3 /k
g-da
y]0.
290.
057
0.01
2
Tab
le 4
OE
HH
A-R
ecom
men
ded
Exp
osur
e Pa
ram
eter
s for
Eva
luat
ing
Can
cer
Ris
k fo
r R
esid
ent,
Wor
ker,
and
Chi
ld R
ecep
tors
Sacr
amen
to, C
ASN
GS
Flor
in F
acili
ty
Not
es:
1. R
esid
ent u
ses 8
0th
perc
entil
e br
eath
ing
rate
use
d pe
r AR
B G
uida
nce.
Wor
ker a
nd c
hild
use
hig
h en
d va
lues
per
OEH
HA
. 2
. Res
iden
t and
wor
ker:
IFin
h =
(Bre
athi
ng R
ate*
Expo
sure
Fre
quen
cy*E
xpos
ure
Dur
atio
n*C
F)/(A
vera
ging
tim
e)
C
hild
: IF
inh
= (B
reat
hing
Rat
e*[E
xpos
ure
Tim
e/24
hou
rs]*
Expo
sure
Fre
quen
cy*E
xpos
ure
Dur
atio
n*C
F)/(A
vera
ging
tim
e)
Abb
revi
atio
ns:
CF
- con
vers
ion
fact
or I
Finh
- in
hala
tion
inta
ke fa
ctor
kg
- kilo
gram
l -
liter
m -
met
er O
EHH
A =
Off
ice
of E
nviro
nmen
tal H
ealth
Haz
ard
Ass
essm
ent
Sour
ce:
Cal
iforn
ia A
ir R
esou
rces
Boa
rd (A
RB
). 20
03.
"Air
Res
ourc
es B
oard
Rec
omm
ende
d In
terim
Ris
k M
anag
emen
t Pol
icy
for I
nhal
atio
n-B
ased
Res
iden
tial C
ance
r Ris
k."
Oct
ober
9.
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2003
. "A
ir To
xics
Hot
Spo
ts P
rogr
am R
isk
Ass
essm
ent G
uide
lines
, the
Air
Toxi
cs H
ot S
pots
Pro
gram
Gui
danc
e M
anua
l for
Pre
para
tions
of H
ealth
Ris
k A
sses
smen
ts,"
Off
ice
of E
nviro
nmen
tal H
ealth
Haz
ard
Ass
essm
ent,
Aug
ust .
E N
V I
R O
N
Che
mic
al
CPF
(mg/
kg-d
ay)-1
Sour
ce C
hron
ic R
EL
(u
g/m
3 ) R
efer
ence
A
cute
RE
L
(ug/
m3 )
Sour
ce
Ben
zene
10.
10 C
al/E
PA 2
007
60
Cal
/EPA
200
5
1300
Cal
/EPA
200
3n-
Hex
ane
7000
Cal
/EPA
200
5
Not
es:
CPF
= C
ance
r pot
ency
fact
orPM
= P
artic
ulat
e m
atte
r(m
g/kg
-day
)-1 =
per
mill
igra
m p
er k
ilogr
am-d
ayR
EL =
Ref
eren
ce e
xpos
ure
leve
lug
/m3 =
mic
rogr
am p
er c
ubic
met
er
Ref
eren
ces:
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2005
b. A
ll C
hron
ic R
efer
ence
Exp
osur
eLe
vels
Ado
pted
by
Off
ice
of E
nviro
nmen
tal H
ealth
Haz
ard
Ass
essm
ent (
OEH
HA
) . F
ebru
ary.
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2007
a. C
alifo
rnia
Can
cer P
oten
cy V
alue
s.O
ffic
e of
Env
ironm
enta
l Hea
lth H
azar
d A
sses
smen
t. A
pril
9.
NA
NA
Tab
le 5
Sacr
amen
to, C
A
Inha
latio
n C
arci
noge
nic
and
Non
-Car
cino
geni
c T
oxic
ity V
alue
s for
Ben
zene
and
n-H
exan
eSN
GS
Flor
in F
acili
ty
Not
es:
1.
BTE
X a
ssum
ed to
be
100%
ben
zene
as i
t has
the
high
est t
oxic
ity o
f BTE
X c
ompo
unds
.
Abb
revi
atio
n: B
TEX
- be
nzen
e, to
luen
e, e
thyl
ben
zene
, xyl
enes
CPF
- C
ance
r Pot
ency
Fac
tor
NA
- no
t app
licab
le R
EL -
Ref
eren
ce e
xpos
ure
leve
l (
mg/
kg-d
ay)-
1 - m
illig
ram
per
kilo
gram
-day
ug/
m3 -
mic
rogr
am p
er c
ubic
met
er
Sour
ce:
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2003
. Air
Toxi
cs H
ot S
pots
Pro
gram
Ris
k A
sses
smen
t G
uide
lines
, the
Air
Toxi
cs H
ot S
pots
Pro
gram
Gui
danc
e M
anua
l for
Pre
para
tions
of H
ealth
Ris
k A
sses
smen
ts,"
O
EHH
A, A
ugus
t.
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2005
. All
Chr
onic
Ref
eren
ce E
xpos
ure
Leve
ls A
dopt
ed b
y O
ffic
e of
Env
ironm
enta
l Hea
lth H
azar
d A
sses
smen
t (O
EHH
A).
Janu
ary.
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2007
. Cal
iforn
ia C
ance
r Pot
ency
Val
ues.
Off
ice
of
Envi
ronm
enta
l Hea
lth H
azar
d A
sses
smen
t. A
pril
9.
E N
V I
R O
N
Can
cer
Ris
kC
hron
ic H
I 1A
cute
HI
(in a
mill
ion)
PMI 2
92 m
eter
s fro
m so
urce
130.
008
0.01
4
ME
IW 3
Nea
rest
off
site
wor
ker i
dent
ified
at 1
50 m
eter
s nor
th o
r eas
t of s
ourc
e2
0.00
170.
013
ME
IRN
eare
st re
side
nce
iden
tifie
d 80
0 m
eter
s wes
t of s
ourc
e6
0.00
350.
0059
Still
Wat
er's
Aca
dem
y 4
8008
43r
d A
ve. (
900
met
ers w
est o
f sou
rce)
0.2
0.00
310.
0052
Eld
er C
reek
Ele
men
tary
479
34 L
emon
Hill
Ave
. (90
0 m
eter
s wes
t of s
ourc
e)0.
20.
0031
0.00
52
101
1SM
AQ
MD
Sig
nific
ance
Thr
esho
ld
Loc
atio
nR
ecep
tor
Tab
le 6
Sum
mar
y of
Car
cino
geni
c R
isks
and
Non
-Can
cer
Haz
ard
Indi
ces
SNG
S Fl
orin
Fac
ility
Sacr
amen
to, C
A
Not
es:
1.
Chr
onic
HI =
HQ
benz
ene +
HQ
n-he
xane
2.
The
PM
I ref
lect
s res
iden
t exp
osur
e as
sum
ptio
ns, t
houg
h th
ere
are
no re
side
nces
at t
his l
ocat
ion.
The
refo
re, t
he S
MA
QM
D S
igni
fican
ce T
hres
hold
is n
ot
exce
eded
. 3
. Pe
r OEH
HA
gui
danc
e, th
e ai
r con
cent
ratio
n us
ed in
eva
luat
ion
of th
e ch
roni
c H
I for
the
MEI
W w
as a
djus
ted
to a
ccou
nt fo
r non
-con
tinuo
us e
xpos
ure
(e.g
., 24
5 da
ys/3
65 d
ays a
nd 8
hou
rs/2
4 ho
urs)
. 4
. A
s a c
onse
rvat
ive
estim
ate,
no
adju
stem
nt w
as m
ade
for e
xpos
ure
dura
tion
at th
e sc
hool
rece
ptor
s. A
bbre
viat
ions
: H
I - H
azar
d In
dex
HQ
- H
azar
d Q
uotie
nt M
EIR
- M
axim
ally
Exp
osed
Indi
vidu
al R
esid
ent
MEI
W -
Max
imal
ly E
xpos
ed In
divi
dual
Wor
ker
PM
I - P
oint
of M
axim
um Im
pact
SM
AQ
MD
- Sa
cram
ento
Met
ropo
litan
Air
Qua
lity
Man
agem
ent D
istri
ct
Sour
ce:
Cal
iforn
ia E
nviro
nmen
tal P
rote
ctio
n A
genc
y (C
al/E
PA).
2003
. Air
Toxi
cs H
ot S
pots
Pro
gram
Ris
k A
sses
smen
t Gui
delin
es, t
he A
ir To
xics
Hot
Spo
ts P
rogr
am
Gui
danc
e M
anua
l for
Pre
para
tions
of H
ealth
Ris
k A
sses
smen
ts,"
OEH
HA
, Aug
ust.
Sac
ram
ento
Met
ropo
litan
Air
Qua
lity
Man
agem
ent D
istri
ct (S
MA
QM
D).
200
4. G
uide
to A
ir Q
ualit
y A
sses
smen
t in
Sacr
amen
to C
ount
y. J
uly.
E N
V I
R O
N
APPENDIX A-4 Odor Analysis
Prepared by Impact Sciences, Inc.
August 2008
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APPENDIX A-5 Greenhouse Gas Emissions—Construction
Prepared by Dudek
August 2008
INTENTIONALLY LEFT BLANK
Adjustment of Estimated Construction Emissionsto Account for Other GHG Emissions
from Construction Worker Vehicle Trips
Emission SourceData
SourceWorker Trips 1 392 tons CO2
2 413 tons CO2E
Project Total 1 979 tons CO2
Diesel Equipment and Vehicles calc 587 tons CO2
Adjusted Total calc 1,000 tons CO2Ecalc 907 metric tons CO2E
Notes:1. tons of CO2 from SNGS, Supplemental PEA (2007).2. US EPA, Office of Transportation and Air Quality, Greenhouse Gas Emissions from a Typical Passenger Vehicle (EPA420-F-05-004) , (2005) 4
Project Construction Emissions
INTENTIONALLY LEFT BLANK
APPENDIX A-6 Greenhouse Gas Emissions—Operational
Prepared by Dudek and Impact Sciences, Inc.
August 2008
INTENTIONALLY LEFT BLANK
Sac
ram
ento
Nat
ural
Gas
Sto
rage
Com
pari
son
of G
reen
hous
e G
as E
mis
sion
s fr
om E
lect
ric
Mot
ors
and
Nat
ural
Gas
-Fir
ed In
tern
al C
ombu
stio
n E
ngin
es
CO
2EC
O2E
Em
issi
onE
mis
sion
Ann
ual C
O2E
Ann
ual C
O2E
Fact
or 3
Fact
or 4
Em
issi
ons
Em
issi
ons
Sou
rce
Ann
ual E
nerg
y U
sage
(lbs
CO
2E/k
W-h
r)(lb
s C
O2E
/MM
Btu
)(t
ons
CO
2E/y
r)(M
T C
O2E
/yr)
Ele
ctric
Mot
or-D
riven
Com
pres
sors
16,
222,
000
kWh/
yr0.
714
2,22
1
2,01
5
Eng
ine-
Driv
en C
ompr
esso
rs 2
63,1
93M
MB
tu/y
r11
7.3
3,70
7
3,36
3
Diff
eren
ce in
GH
G E
mis
sion
s(1
,486
)
(1,3
48)
Sou
rces
:1.
SN
GS
est
imat
es th
at th
e el
ectri
c-po
wer
ed c
ompr
esso
rs w
ould
use
6,2
22,0
00 k
Wh/
yr fo
r inj
ectin
g ga
s in
to th
e re
serv
oir.
2. A
ssum
ptio
ns fo
r eng
ine-
pow
ered
com
pres
sors
Com
pres
sors
wou
ld b
e dr
iven
by
two
Cat
erpi
llar 3
612
engi
nes
rate
d at
3,5
50 H
P e
ach.
Eng
ines
wou
ld c
ombu
st 7
,470
Btu
/HP
-hr a
t HH
V.
Eng
ines
wou
ld o
pera
te a
t equ
ival
ent l
evel
s (h
ours
and
load
) to
that
for e
lect
ric-p
ower
ed c
ompr
esso
rs.
3. S
MU
D. A
nnua
l Em
issi
ons
Rep
ort.
http
s://w
ww
.clim
ater
egis
try.o
rg/C
AR
RO
T/p
ublic
/Rep
orts
.asp
x (R
epor
t is
for 2
006,
but
it a
lso
repo
rts d
ata
for 2
007)
.
T
able
s C
.6 a
nd C
.7.
Whe
re:
CO
2EC
arbo
n di
oxid
e eq
uiva
lent
kW-h
rki
low
att-h
our
lbs
poun
dsM
Tm
etric
tons
(= 2
,204
.623
lbs)
yrye
ar
4. C
alifo
rnia
Clim
ate
Act
ion
Reg
istry
, Gen
eral
Rep
ortin
g P
roto
col:
Rep
ortin
g E
ntity
-Wid
e G
reen
hous
e G
as E
mis
sion
s V
ersi
on 3
.0, (
2008
)
Sacramento Natural Gas Storage
Heat Input Rating 3.0 MMBtu/hrOperating Hours 3,075 hr/yr
CO2 CH4 N2OEmission Factor kg/MMBtu 53.06 0.0059 0.0001Global Warming Potential 1 21 310
Greenhouse Gas Emissions metric ton/yr 491tons/yr 541
Source:Operating Hours: Environ, Health Risk Assessment Screening Analysis - ProposedSNGS Project, 3/25/08.Emission Factors for Natural Gas Combustion: CCAR, General Reporting Protocol, 2008.
Greenhouse Gas Emissions from Glycol Reboiler
Impact Sciences, Inc. August 2008
8/11
/200
8 1:
23:1
5 P
M
Pag
e: 1
File
Nam
e: C
:\Doc
umen
ts a
nd S
ettin
gs\d
deck
man
\App
licat
ion
Dat
a\U
rbem
is\V
ersi
on9a
\Pro
ject
s\S
NG
S -
Wor
ker
Trip
s.ur
b924
Pro
ject
Nam
e: S
NG
S -
Wor
ker
Trip
s
Pro
ject
Loc
atio
n: S
acra
men
to C
ount
y A
QM
D
On-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Off-
Roa
d V
ehic
le E
mis
sion
s B
ased
on:
OF
FR
OA
D20
07
Com
bine
d A
nnua
l Em
issi
ons
Rep
orts
(T
ons/
Yea
r)
Urb
emis
200
7 V
ersi
on 9
.2.4
TO
TA
LS (
tons
/yea
r, u
nmiti
gate
d)10
.57
SU
M O
F A
RE
A S
OU
RC
E A
ND
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES CO
2
TO
TA
LS (
tons
/yea
r, u
nmiti
gate
d)10
.57
OP
ER
AT
ION
AL
(VE
HIC
LE)
EM
ISS
ION
ES
TIM
AT
ES
CO
2
Sum
mar
y R
epor
t:
8/11
/200
8 1:
23:1
5 P
M
Pag
e: 2
OP
ER
AT
ION
AL
EM
ISS
ION
ES
TIM
AT
ES
Ann
ual T
ons
Per
Yea
r, U
nmiti
gate
d
Gen
eral
hea
vy in
dust
ry10
.57
TO
TA
LS (
tons
/yea
r, u
nmiti
gate
d)10
.57
Sou
rce
CO
2
Ope
ratio
nal U
nmiti
gate
d D
etai
l Rep
ort:
Ligh
t Tru
ck <
375
0 lb
s12
.54.
088
.08.
0
Ligh
t Aut
o59
.51.
797
.90.
4
Lite
-Hea
vy T
ruck
10,
001-
14,0
00 lb
s0.
00.
055
.644
.4
Lite
-Hea
vy T
ruck
850
1-10
,000
lbs
0.0
0.0
76.2
23.8
Med
Tru
ck 5
751-
8500
lbs
0.0
1.0
99.0
0.0
Ligh
t Tru
ck 3
751-
5750
lbs
28.0
0.9
98.7
0.4
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
Gen
eral
hea
vy in
dust
ry1.
5010
00 s
q ft
4.00
6.00
62.7
0
6.00
62.7
0
Sum
mar
y of
Lan
d U
ses
Land
Use
Typ
eA
crea
geT
rip R
ate
Uni
t Typ
eN
o. U
nits
Tot
al T
rips
Tot
al V
MT
Ana
lysi
s Y
ear:
200
9 S
easo
n: A
nnua
l
Em
fac:
Ver
sion
: E
mfa
c200
7 V
2.3
Nov
1 2
006
Doe
s no
t inc
lude
cor
rect
ion
for
pass
by tr
ips
Doe
s no
t inc
lude
dou
ble
coun
ting
adju
stm
ent f
or in
tern
al tr
ips
Ope
ratio
nal S
ettin
gs:
8/11
/200
8 1:
23:1
5 P
M
Pag
e: 3
% o
f Trip
s -
Res
iden
tial
100.
00.
00.
0
Trip
spe
eds
(mph
)35
.035
.035
.035
.035
.035
.0
% o
f Trip
s -
Com
mer
cial
(by
land
use
)
Gen
eral
hea
vy in
dust
ry90
.05.
05.
0
Rur
al T
rip L
engt
h (m
iles)
15.0
10.0
10.0
15.0
10.0
10.0
Urb
an T
rip L
engt
h (m
iles)
10.8
7.3
7.5
10.8
7.3
7.3
Tra
vel C
ondi
tions
Hom
e-W
ork
Hom
e-S
hop
Hom
e-O
ther
Com
mut
eN
on-W
ork
Cus
tom
er
Res
iden
tial
Com
mer
cial
Urb
an B
us0.
00.
00.
00.
0
Mot
or H
ome
0.0
11.1
77.8
11.1
Sch
ool B
us0.
00.
00.
010
0.0
Mot
orcy
cle
0.0
71.4
28.6
0.0
Oth
er B
us0.
00.
00.
010
0.0
Med
-Hea
vy T
ruck
14,
001-
33,0
00 lb
s0.
06.
218
.875
.0
Hea
vy-H
eavy
Tru
ck 3
3,00
1-60
,000
lbs
0.0
0.0
20.0
80.0
Veh
icle
Fle
et M
ix
Veh
icle
Typ
eP
erce
nt T
ype
Non
-Cat
alys
tC
atal
yst
Die
sel
INTENTIONALLY LEFT BLANK
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