HomeMy WebLinkAbout82-62 FILE #2 EIR BIDWELL HEIGHTS LAND CO. 6 OF 10i
REFERENCES`
Outte County
Butte County, Genernl Plan, Land Use Element, Noise Element, Zoning Ordinance
Zr Butter County ,Planning Department. (Sept;, 1, 1981) Memo to Board of Supervisors
3: (August 24, 1981) !demo to Doe Mill Ridge landowners
a
State of California
E
1: Air ,Resources Board. (May, 1980) Lecture Notes for Workshop on Estimating
Carbon.,yionoxi'de Concentrations for Not Spots An ysi5-_ CARB Researeb Division$
Air Quality Modeling Section
2. (June w, 1981) Predicted Calit'ornia Vehicles :Emissions (tYTAC 60
computer run far S€zCtarncnto Valley Air Basin, Butte County, 1990
3, (June, 1981)j ulgment'_2 to Procedure and'Basis for Estimating On-
Road i�ilotor Vehicle Emissions; GARB Stationary Source Control Division, Emission`
Inventory Branch, illotor Vehicle Emissions and Projections Section-
4, California Admin. Code, Title 25, Housing and Community Development, 'Chapter 1,
Subchapter 4, Selction'28, Article 4. "!Noise Insulation Standards"
5. California Highway 'Patrol. (October) 1977) Motor Vehicle Noise taws
60 Department of Healli,. Office of Xoisc Control; (inlay, 1975) Estimation of
Communit Notice Exposure in Terms of Day-i ht Average; Level noise Contours,
Draft
7. (AApril, 1977). Model Community noise Control Ordinance
S, Offieo of Pi�umning ,nd Research'•(1978), An_Urban Strategy for California
Misce1land6Us
Fara Applied Srienees; Inca (Aprils 1;971) Paradise Pines Surface later Quality Report
1
NOAA, Climatological Data, Annual'sumitavy
EMo-Ar�al19 2 EIRfar ciohyon, Park P - Rezone ,and ?"entat1-V
'.i
*ub '
ua04r1al yrsts. (Eeoxuary 1982) E1P To, aurtee : =f4iie as See PA-0 Retone aid
Butte C+,antY Planning l e'par tMexat. uprli ion E _ , for Chiido ,Area Lana: Us Plan..
;
r
77777-77777
Imo,
PERSONS AND; ORGANIZATIONS CONSUL` E
�. State of California
Michael 'Rederner
Air Resources Board
Ed Potter
Susan Scott,
Haiman, Professor,
Chico State University
Richard
Department -of Geagraptiy
t-
Fish and Game Department
Jim Snowien
Bob Mapes
Hector Reed
Forestry Department
Transportation Department (CAL VANS
Bob Burrow
Sam Johnson
•
Gene Abshier.
Bill. Wells'
Dick Dyer
Ro'be�,t gkidmore
Health Department:: -Office of Noise Control
Jerome Lukas
aunty of Butte
Air Pollution Control District
Richitri Booth
Enviranfiental HeaithDepartment'
.Tom Rpid
iloward; Sndr
Dan Costeho
Fire Depw tment
Chief Dick Tiller,
Charles Woods, ,A,dwance,
Planning Department
Planner
Steve Streeter
PhWorks Department
Robert Jones
Stuart Edell,`
wiiJ'i'aM che: i
Richard Bruch, I;ieutennnt
Sheriff's Depactment'
w.p City of'rhieci
Torn Lando, Direc toy r
Planning Department
p'aZineci, Platnt cr
Urtiiied 5chooi District
Ben matthev s", i ireato o
Elementary Education,
.eimiib'A�
i
r
YDS
MAYBE . N0 r
h.
Exposure of or pzopetty
4 - --
to geologic hazard,s such as
earthquakes, landslides, mod,-
slides; .ground £az pure, or
h
s-imilar hazards?
.�
2.; Air. Wi11the proposal result in:
a.
Substantial deterioration of
ambient or local air quality?
_ �X
b-.
The cr eationof objectionable
odors, smoke or fum, eS
c
ai;gr).if.c:ant alteration of air
mOVeqxent, moisture or, terr_per,ature
or any change in climate, either`
10ca11,IY 0r regionally'
3'. Water, Wilrl the p-roposswl result in :substantial:
a a.
Changes in currents,, or tiie
course or direction of water
x
b.;
Changes ire;, absorption rates,
drainage a patterns, or.therate
and amount of sur- faca water
unff?
ro
X
c
Deed for offsite. star face
aminase improvements , including.
Vegetation removal,, channelza-
x
tion or culvert,-o,gtaLlation?
d.
Alterations: to the course or
x
flow Of flood w:ater'u
e
Change in e;he a i6utit of sur, lace
water %"n any wa't.er, body? ��
.X
f.
Discharge .110 o sur face Caters,
o� ,in anyal tet'atio of surface
water quality, inc31""Uding hub
not limited to �temperetixr, "
d'issol ped axyge?n or Turbidity?
:
g.
Alteration of t ie direc,C 6 or
" ow o,i; ground waters?
rate: .o f x l,
x
h.:
Chari�,e-' in the quantity or
qu:a'lity of ground water , either
Gb'rougb di�eot ;cddi tions or'
withdra als, or: Ghror�gh , inter-
ce'ptioa of:.an aquifer by Cu
or excavationsexitavationsl
x
xis. �����taE
NO .
i. Reduction in the' amount of water,
otherwise availabl.e for public
or private water supplies?
j. I-xposure of people or property
to water related hazards such as
xc
flooding?
4., Plant Life Wilfl the proposal result in'
su stantial.:'
a.' Loss of vegetation or change in.
the diversity of species or number,
of any spet;: es of plants (including
trees) shrubs, grass, crops;; micro-
flora and aquatic plants)?
b. Reduction of the nutb,ers of any
unique, rare Or endangered
species of plants?
c.; Int=roduction of new species of
plants into an area, or in a
barrier to the normal replenish-
`
meat of existin=g species.
d. Red=uction in acreage of any
x;
agr icultural crop?
5. Animal ` Life.. Ll;ill the proposalresult in
substantial;
a. Change in the diversity of specie ,
or _nuttber's of an,y species of
animals, (birds, land animals,`
incltadi'ng reptiles, fish". and
shell:fi:sh; `benthIc organa sots, X-
i n Sa.c sor, °microfaur a)?
_.
b. Reduction of. the, nuubers. of any
unique,, rare or endangered
X,
species of animals?
c. Introduct.iod of neCa specie of
anir1als into ,an area or resLlt
in. °a barrier t'o the migr`atI.
or; move of animals?
d.: Redact El off, encroachare'nt upon,
.0
or_det6tioratioc► to exisng: -
is or wil:dl.ife havitat? x
6"WIlLil the proposal result in
substantial
Xc
a. Increases in noise levels?
YES
MAYBE NO
�- -
b. E�cposure of people to severe
x
noise levels"
7.
Light and Clare. Will the proposal
x
produc® signi,�icant. dight or -glare?
8.
Land Use. Will the proposal result
in a s 9nII i;cant
a Alteration of the planned land
use'of an area, or establish a
trend which will demonstrably'
lead to such, alterat,i,ona
—
b. Conflict w"ith uses o 11
adjoining properties, con-
.
nor
flict with establisher recrea-
tional, educational, religious
or scientific uses of an area?
9.
Natural 'Resources. Z�ill the proposal
1
l'E:S'`tJ t in su,Dstactti; is
a.: Demand For of increase in the
` rate. of use of any na.tural
x
re50utte:s?
b. Depletion of any non�tenewabLe
X
natural 'resource
ln,
Rusk of Uoset, Does the proposal.,`
involve a risk of an explosion or
the release . of hazardous' ,subs.tFnces
(including, ,but not Itmited CO. 011.1
pesticides, chemicals or radi:at.ion,),'
in the e4�ent of an aecidecit or upset
x'
coeditionsi
11.
Population.. Wi I'll the proposal
signs scantly Alter, the locati on;•
dist4ibtion,. densi.tyr or growth
rate of the,.'human. uopulabi,'o,n of an
area or 'physicalydvide. an
established combunor, ' f'ac.i`litat X.
develop orb adjoi'riano 'p,r,operties�
12.
HousIng dill the proposal sini;Li:..
Canftly alf cC eXbsting housings or
create a de�and :For ,adds b.iona;l
'
housin7
6,n•sp6t a t t onCC 4r, o.ut"at.ion. WL'. tiie
prppgsal, result tint
a. Generation of substantial
add 1, ti x* ta1 v'eh icul.$r MOVement? .
YDS
MAYBE NO
b. SignIficant effects on existing,
parking facilities, or':demand
for new parkin7
x
e'. Substantial impact upon existing
transportation systems?'
x
d. S' gnificant alterations to
present patterns of circulation
or movement of people and/or
goods? -
X
e. Alterations to Waterborne, rail,
or air traffic?
IX
f► increase im traffic congestion o,
hazards .to motor vehicles,
bicyclistsor pedestrians?
x
14. Public Services. Will the proposal
ave an errect upon, or result in a
substantia need z;or Hera or altered`
governmenfal services i'n, any of the r
foll.oWing areas:
a=
a. Fite protection?
x
b Police protection?
c; Schools?
X
d. Parks or. other'recr'eational`
facili`Cies'? -
X
e Maintenance of public faciFl%ties,
including roads?
X
f Other governmental 'services?
X
15 EnerC Will the proposal result ins
a, Use, of;,,substantial amounts of
fuel 1 or energy?` X
b. Substantial: increase in demand
upon. a List pg sources cf energy,
oz, req ii.re 't'he development of
nein sources' of energy?
"
.�_.
16 Utili.tes . tJill the prgpasal result
i,k1 a nezd Eor n:et� sys�teMS, Or,$u'b—
st;ant ial alter;at icsns to the following
utiIitzeq
Power or naltural, gas'?
TT
X
b. (:'ominunicat:ions systems
r`
..�;,. _.��..
c; Water?
Sewer ,(Vill trunk line to
extended, proaa`idi g eapa ity
to -serve n4�w di,�velopmenC) 7
e tom water ,drainage? :'
x
l7
Huma i c l,:: „ Wi 11: twit proposal
res,ULt:
a: CrreatioLr cf any he-plth hazard
'J
C,!; po,tetit i;3I hr a,> wb hazard
"excluding mI4otal healtk't).?
b. Y,xposure of people to potential ,
hei.A th haz rd s?
x
18:
So1.id Waste. `fill the, proposal resti t
in any significant; impacts 'associated
with solid ,caste 4ispos,al or litter`
-
�^rr�ntvrt?�.'?
I';-
Aest betic;s . will thie propo tal tesu11t
u , pub 1%r�,
designate�or�recognized :scenic; 'v" s t:a
g ct�:
open to th,ei public? Will, the propos'a:l
°result` i,n the creation of an,
aesthetica11,Y offer sive site open tU
r�ublic vieWill the Proposal'
algnifarzan; 3-�y altar the charact —r or
-
the area?
,og,reatlia- l Will the proposal result
in, an, impact upwant the quality or
quantity of e; isi,-ing puhlzc e ear
tion flacilitzes? ,.
21,E
a�.rcha6o Ogtea i:�Htstoxic�l. tRill. the
propo>a . rosu ,t iii �a; a .�ratioh o
aslttl ficacit asci ae 1. gical or
b;tstor;icaI site, suptTOrt, object
lib
t andat'or idrts '' S�riicance
.
a. Dries the. g'roJect ha.vo the potential
to` d e, ede tete aqua lz.X of" he
en Vi -sbstwar►t%aLly -educ-
e.ducthe
t h hahit~at a,t a zsh o Oftd,IAfe
921ed s, C aU 15 it 01 1.:5� 0 �,J, 'Jfe
III. n
:
.f
a I {.t : a .dwell .He igh t J �, '� r� • • r � � �'. j VO f j y/Pages : 46
f: s " tH f dt # fI 82 --{)?i-0202 wz� 11 01 t
Project # 82-62
x �•
l : Specific plan, rezone and subdivision
, .
3,rj t:f L^ : t'` I' �j:'t t "' • ;: The project is a subdivision at about 1200 acres into around
330-385 ihomes,ites with appurtenant servide's
^:»
w -,',i iri, Fest side of Doe Mill. Ridge, 7 stiles N� of
, Chico, between Little Chico
_-_
Greek end Doe -fill. Ridge Road. Portions of sections 6, 7, and 18 of T.2 2R, R3E, MD24q
and a portion of Section 12 of T22N, VE 1.1DB&
tx .
PC'0 t IIt{It-;'1. ',y t i4 �,.>"tt l e i'tr.°.tt 1 DU/3 acres , avg.
.ltiOLJ I; Of ITIj ta'tyt'tt ue- .aLt21 . t'1tsl; Aopro 7' percent of ptoJett area
f
y+ xtd ;4'ii'1-�u112 ' Cx.c3,(. Access watild be from Highway 32.via Santos
Way extension through Isom -Hall property, Doe Mill. Midge Road lies to the east.
lip' thod L:ir j 'l*.osaj . • individual septic tanks..
Z
SbLlxIndividual wells.
.-�
PxO'.• � Otsr L] t.,or, Existing t ' ro 3ect site.
10.
oUtxrl.uJ't:t. xttx:i O ` .tc 4s . ,s :fit; u : ;'f. dk tilk,mG : Agricultural- Resi-_
dentia.l designation ,allows for 1--40 acres/DU. -
B.
P,s�,.cw r: FlI rr! n.wT�7
(sC7.4 ? o tr:; �t�M;. i. 1`ht4.`f'C : `Flat tri gently rolling,up-'lan8 wast of, Doe
..
Mill. Ridge, with smallsteepei, portions, as, land s°tppp es to Little :Chico :and Butte Creeks»
b. t'-�l cj;' Under SJx on -Hain upland portion L1:00% on eastern slope---. 30-45 at
north, test, south margi0s.,'
t� �• "*. ; ; Y 1160 1.640 feet; the flet up and .is at around 1460 feet.
^
P « " ! .�'°' ?'°av 1 tai"„, ; small area's or steep :!'lopar,
' w ,
r� �t..; .t,•A ct1'i w'° ,'.` : Toomes soils thin under -2. feat thick) to. 4
or. 5 .meet deep in 'same parts; a stony reddish brosm c1a loam: with lora to mod, -'rare
subsoil permaabilir-� anti shed uet to vapid ru_ r�ctf_ ”
!. "tui* `r� `', `►Seye.re limitat.iorgi rating for suitability:_ oi'seg it --tank
« l? -;C:"
leach fields.
r
y ,
f
« E'_`:t'1 t''� tk�t. € �.�alt,• : iodera;ce Earthquake Tntensa t.y zone VIx1
c,. I.I`O:'i;",I It�I.r °t!.'^ dight ; : t• i_" t • '•Irl: lii h
t•yx=:id.w'.# P,sGs„�.1 « Roderat Z.
]Jo G7 ro ,Mod,erate'
,A small stock watering pond is lzicated near the ..center,1��
theP roperty.
'
a
h� d yell DISCUSSION, p, 2
_._ ..,
Lydon-- page two
october 13, 198
'
;
,proposed lots in bland having 'both parcels is devoid, of 9 at I.ea. st
some gentle slopes.
Little Chico Creek flaws southwest through the western
parcel. Tributaries fla;ving east and west, into the Creek, carry
water- intermittently, and account for the Canyon -acrd -ridge topo-
w
rap'rty that dominates the areas below the relatively -flat
upland ridges
81pvatjohs range from 6120 to 780 ft along Little Chic
Creek, and from 1360 to ft on the u:plind ridges,
SOILS
According to the Soil Conservation Service L961), tie
he oo,Mes-Pent. Assocz ion.
parcels are covered by soils of t`T'
Toones soil, which is dominant on t'he slopes of the s.iueW; is
;I
typically a )?to slightly hard, cobbly loam. it `tends 4G be
Nare present.
.g th
'Less than 2 ft thick, 'but pockets of greater dep
Clay content'is variable.
Taom es soil tends to have moderate subsoil permeability,
medium to rapid runoff, high erosion hazard, low shrink=well,
behavior; and; a 'severe limitation" rating far s�ifability iri
sept _=
hydon page four
Qctobez 13, 1981
through'thc? Tuscan Formation from near Pentzz to near Red Fluff.
1
A recent study of this zone (I a wood et al. 1981) leads to
these conclusions: (1) Faulting occurred after deposition of
the Tuscan Vormatlon,s and offset rocks that have been radio-
metrically dated at 1.1 million years,- (2) The age of the most
recent fault movement in the zone is not kno-�m; (3) I-towev'er,
the existence of -rauult scarps l meter high near Red Bluff
;
suggests that some fault movement "undoubtedly took place a_n
the'past million years" and () Folding of the Chico manocline
and formation of its rnarzy ';small faults probably occurred in .
response to movement on larger but deeply-buriedfaults.
GEOLOGY OF TH8 SITE
Three geological uniuq., all gently inclined toward the
southwestA are exposed on the parcels (see geological map)
Fromoldest, to youngest they are:
(1) Tan; sometimes sandy or pebbly, claystone and clayey
siltstone of the Chico Formation. This sort and easily --eroded
unit tends to be covered by rock and soil debris washed driven
onto it from adjacent. slopes.
k
(2) Fractured black .Lo.vejiey Basalt« This unit is hard and
cons uez tl ,_ it corms either stee bluffs
resistant to erosion . y -
where cut by a stream, or else broad, -I la.t benches, near LittIe
Chico Creek. The roes is hvilY fraGttzred,' bu.t nonetheless is
relatively imsrmea.ble, so that small soaps, springs, and boggy
spots farm at the base of the overlying Tuscan Formation.
(3) Tuscan Fortaion, consisting o.f alternating �aye;rs of
volcarIIIc-mudt,low ddbr19 (tuff bj, eccla) and volcan c sandstone
and cong] omera'e. Th1v;as ,are rel tiv6.l� impex ble and
intervening:
intervening layers of '°voica�iit �ed�.;ment 'aro relatively P0
a5 a resszlt, t,r:es and,:.brush a� ign t;herseives in alnrest- ;
horizontal ,s"t Canyon 1"'alls�'' following the pormeal Ie
rock, Volcanic -sediment layers predominate :in the lower ,part
of t'he Tuscan°"orration, whereas i�i�tcifloty ley'ers are dorr�.nar;t in
the upprizr part.
4
Lydon 9e six
October 13 �, 1981
are relativel- young (Movement within the last million
Years) ,
and ( a�cydorn recorded earthquake activity within the
zone shows
that browing of .rock--- at seas; at depths of a tew kilometers---
is art activity Occurring Ir
urring Irtemittently at the
present time.
HYDROLOGY
A hydrological assessment of the parcels will be made by
Jan �nclersan, so a few general remarks here will The
'Suffice.
only, permanent ,stream on the site is Little Chico � reek, but
-�
all the major inches and the
� many of 9 � e smaller ones can be
expected to carry law flows of water intermittently during the
razny season,.
ancient crystalline rocks of the .sierra the Chico Formation:,
and the Lo,t,ejoy Basalt generally yield no. or only small flow*s
Of water to wells, chiefly from intersecting Fracturesor
perm-
eaksle layers of liMited extent, Because the Chico Formation
was
deposited in an ;Oce:an, contained -rater might, be saline IOr brack-
ish, although Llushling o- any permeable layers by groundwater
movEmerrt Might:have replacedsome of ;theoriginal salt
wager with fresh wat.r, y pore
The Tu' scan �"orMation contains nterlayerede
p rmeable (sedi =
menta.ry) and, impemeable (mudflo�r) layers, with the permeable
ones being °more abundant in the 16ifer, part ofthe unit. Because
the' underZyirtg Lovejoy Basalt tends to ,be imperxeable, water int
the l owst part cif the Tuscan usually w,i11 nal leak hraugh the
ovejoy, but wi1Z bt? transmi teed latera; 11until it ,intercepts
canyon galls: This general observation is borne out by the
presence of sevarai's maIl ,s"17, Fns rx the to ner part of the
Tuscan,rithin and ouside.the parcels, and by the fact that a
well neab the. paneIn �a 1/4 sec. � yi:eids a s��bstantial flaw.`
of water .For a depth o 70€J ft .'iys v oral cittimuiait~a ti
October 19£l .� nce the we 5 l is at arl elevation c�z' about 1600,
ft,, it Penetrated to within IPO f El of thepyo jetted subsurface
elevation of the Loi e cry BasaI r or, within ?00,+ Ift Of the pro,
jet:tion of the Chico zormatian, J
4
Lydon page ten
'
October .13:! 1981
+either
by a rock type tbat is impermeable.or, if fractured
sufficiently, lacks absorptive capacity. Soil derived from. the
Chico Formation probably is unsuitable for leach fields because
of Its high clay content.
mitigations that can be used in soils that are only marginal-
r
ly suitable for leach fields include using greater; length of
leach pipe than ot,hexwise would' be done, excavation of theLeach
field to a greeter11 depth, than assumed by the Sail Conder,,>ation
Service Criter,i,a, and, if n , essazy, use of imported fill tc°
i reprove filtration characteristics.
Landslides and rockfalls. The County General Plan rates the
relative risk from' 14ndslides on the site as. "moderate
Examination of low-level air photos, and coverage of most of the,
-T
property an the ground; failed to reveal any, evidence of land-
slides, Even on the steeper parts of canyon galls, the strength
of rock units appears to be great enough to prevent slides from
developing.
Rockfalls do occur, however. o rockfall is the rapid fall; -
at Least partly through air, of ;single or multiple blocks of
--
rock, erosion-ressta'ht, cliff -forming lad=ere of mudloE,* debris
in the Tuscan Formation' are underlain by °,'soft,er morey-erodible
P
sedime' ntary layers; AS erosion of the soft material undercuts
the hard layers; material in sma"ll cliffs breaks away aleirig
near -vertical fractures grid ,tumbles downhill.
I -n places: small boulder -sized pieces of triva :low%' matera1
are scattered over the surface of the lotrter , gently-slr�ping
sedimentary layers; such rock debris mu:5t Have fallen `and' then°
rollpel or :.slid,'to its present positi;onr
Larne "roc3a.11 bioc3.s' 1+>ererioted at two places west of
L,ttl.,e Chico t�reek. {T`h'ey are above tie a'cces:s road to the: l�rah,e
property, abo k 1200 t! a17OP ft southl"rest of its junc io�i'viit'
the flays-p,rope;rty acces's road. The northerly spat has twro large
blocks (the lar er is about ` 10 x 12 x 8 ft) resting a t the dog -
k ill edge ,of a.; small f+1at bench.' Thi slope lea,rl�n�, �o lie r+aaci
b;eloa'is moderatel steep. dudg'ngro►�a ,:the grciwrtli of trees at,,
Lydon page twelve
pctober '3, 1981
ds mainlyon the distance
The severity of gro�xnei shaping depends
to the causative earthquake the strength. of the earthquake,
and the nature 0,-P the sail and, .rock at the affected site, The
strength of care"hauakos is expressed as magnitude (Richter
scale) , and the 801er%ty of damage in inhabited `areas is express-
scale))
as in tensity (modified scale)
:gignx ficant earthquakes within Fxbaut 27 mi of the site in-
clude one of 14 (magnitude) 5.7'' near Stirling City in 1 4p, xf 4.6
north of Bidwell,' .Park. east of ChIco in 1966, and.M 5,7 at Palermo
In 1.97'5. in, addition, earthquakes having an in��nsity of vi at
their source (macnituc e not recardci) occurred 'n 1342 east of
�tirlinc City and 194 south of paradise (Real of al. 1978, f)I.Y.
i•fines and Geology 19,78).
[paraphrasing part of the Viodifieei mercalli scale:
x ; '�7eaY p.lastez and unreil�fokced adobe crack;zindowrs
break.
V11: Weak masonry damaged., some cracks in Mood but unrein£orc--
ed masonry",
VIZI: Good but unreinfor"ced masonry damaged; 'some damage to
reinLorceci. structures. with good mortar and workmanship;.,
Loose panel Walls thrown out.
�.
- -s ` thin 6 mi of the. site , _ma in;ly
to h
several smaller earhqual�e� n
to the east,; occurred folio zing the x.975 Groville earthquake
�
(Marks and 'tindh 197$) . ;+r'hilo, not significant in terrr,s of
z ,
vantage, ' the-' ind,ca�te that the zone 'of lineam.nts within which
the site lies is, an area of ongoing seismic activity:
1 n :%nferr�'c% aul sho afi on Diaz) ill of the bounty ��rie�al
Flan is the sats;e. as 'the lincament that extends southwest fta
the ceptor of tho north line 13:
Sec- use ''the sits 1 iras i' hiorthern _Xtension of the
foothills" pule �Rstem, attd, hc'cattso t 10 ",�ytem s, n,
considered afaable� of prodttciog a :��a��gtzitude G. ea rt iq�aaCe
` �F1aliC studao5 La SUC�imarixed
+ nc:� f 4�M nj'j ct4''roos � 1 ttii t E' c" n
I)iv.dines and O'Oolo'gy itahf zea, sohab e Planning. t�?
ci�pec� hc� pito to be s;fi octed to a na ;'ttitL�de C5.5 ea rt quake
page 4
t
Based on the information developed in the course of this reconn-
assance, there should
be no severe geotechnical problemiw
s end
{other than those
delineated in the :stated limitations} in
providing structurally -sound residential. foundations within the
project (where vertic9
foundation pressures are expected to be
lass than 1,000 psf ars
lateral bearings to be less than 100 psf
per foot of depth bel6W natural grade). EXCept, as stated, the
provisions of Chapters,
29 and 70'of the Uniform Building Code will
serve to adequately mitigate normal geotechnical hazards,.
it is my recommendation,
and hereby requested, that the soils/
geotechnical report for
'these lands be waived as Provided -in
Paragraph. 20-72 of the
Butte: County Subdivision Ordinance of
October 1976.
Please feelfree to' contact
me if additional, i,nformat on is
required._
sincerely,:_
Joh M. And,e,, soy .'
RCB 25788
Enclosures.:
File No. 176
MA/d,
C`
B. Trucks (LDT)
27,0,0 trips/day x,0.2 (96 'trucks) --.540
540 x 0.519 (from p. E-7) = 28003 cold start trips/day
540 x 0.49 = 259S hot start grips/day
2,
Running Exhaust,Emissions Vactors (g/mi) - from pp,..E-143.148
CO THC
Cars 4.05 0:30
1,06
Trucks 413 0.30
1.12
3:
Hot -Start Incremental Emissions Factors (g/trip) - rom p, l' . 50
Cars 12.20 4.09
0.,46
Trucks* 13.02 4.13
0,49
4.
Cold -Start Ineremental Emissions Factors, (g/trip) - .from p E-151
Cars 103.67 7.32.
1.38
Trucks 111.06 7.41
1,45
5.
Hot Soak Emissions Factoxs (gm/trip) -,from p E-153
Cars
Trucks 0 0.88
0.
unciae 2 -ton trucks,
-2�
ldCli.EMENTAL HOT AND COLD START EMISSIONS
First
cars (LOP), then pickup
trucks (LDT)
CABS 1 tripi (cold Start or hot start
+ running exhaust 4 -bot soak)'
CO
THC
NOx
UNITS,
Cold Start Trips
1: Cold Start103.61
7.32
1.38
2. Running Exhaust
40.5
30.0
10.6
{gm/mix 16 mi/trip)
3. Hat soak
144.1'
3$.15
gm/tr. p
1138.3 cold start
trips/day =
164110$.7
12,692.0
13,636.8,
gm/daft
Hot Start 'Trips
1. Hot Start
12.20
4.09.
0.46
2., Running Exhaust
40.5
30.0
10.6
i
3. Hot souk
_
0.$3
52,10
34.92
11.D6
gm/trip
1021,7 hot start
trips/day =
53,$43.6
35,677,8,
xj,300.0
9M/day;
TOTAL CARS
2Z7;9a2.3'
79,103.9
24,936.'8
rf�
gm/day",
_3_
PICKUP TRUCKS
co
THONO.
'
-UNITS
Cold Start Trips
1. Cold Start
111.00
7.41
1.45
2. Auning Exhaust
43.3
30.0
11.2
3. iiotSoak;
-
0.88
-
154.36
38.29'
12.65
gm/trip
280.3 cold start
trips /day =
43,251.6'
:10,732.7
3,545.8:
gm/day
-Plot StattLTrip
-
1 riot Start
13.02
4.13
0.49
2; L Running Exhaust
43,3
30.0
11.2
3 Hat Soak
-
0.88
56.32 L
35.01
11.69
gm/trip
259.7 hot start
tris/day'=
14,626.3
9092'.1
3,0.35.9
gm/day
TOTAL ,rAUCKS
57,883;5.
19,824.5
6,581.6
gm/day
TOTAL CARS
(fromp.3)
21?952:3
79;103'.9
24,96.8
Trucks + Cars
TOTAL VEHICLE
Ei ISS;ION in gmlday
2750835.8
980 8,4
581
3:r0;4
All Y, 6.�ices nli trips
'
in 16fts day
0.3;034
0. 088
0.0347
4
r,
EMI&9IONS IMPACT OF BUTTE 1;, 1W ITY EMISSIONS
(Sac Valley AHt Pasin, :RMFA1 A ; Data)
l'r} :(ct Ineremei+
9b Project of
Air Basin, - Vcij °) > Emissions, of
fir Basin
1`090 Prediction ° )0 Cale. Es`in'
(T/day) Wday)
Butte County
CO82413 0,3034
0,037
THC 8-43 0.1088
x.29,1
NOX 13,77 0.0347
0.252'
Source: CARB ENIFAC60 run of Predicted California Vehicle Emissions for Butte
Co., Sacramento Valley Air Basil
Conversion I kg = .45 kg' x 20:00 lb > = 909.1 kg
.-- —_
(gm/day - T/day)' 2.21b lb T'
g' x 1 kg x IT = T
day --U g' 9094' aay
Factor - 1
5
r
Amai!
INT AIR QUALITY STAND BDS
pollutant
AVeregfng TfmO
California Stgnda�dsl
National stenderdex I
Concentration'
Method<
PrImaryj
Secondary; "
MethoO
Oxidantl4
1 hour
0 1a ppm
Ultraviolet
--
(200;ug/10
Photometry
ozone
i hour
--
--
240 ug./mt
Same as arttriary
Chetniluminescent
_.
(0 12 pprn)
Standard _
Method
Carbon Monoxide
12 hour
10 ppm
J
(11 mg/m3)
8 hour
Non-Dispersive
Infrared
it? mg.+mt
Sam o as
Primary
Non-Dispersive
infrared
Spectroscopy
(g Ppm)
Standards
Spectroscopy
1 hour
40anm
0 g
(46 mg/ml)
ppm)7
Nitrogen Dioxide
Annual Average
—
100 trg/ml
Gas Phase
1 hour
0 2$ ppnl
Saltzman Method
1 05 ppm)
Sema as Primary
Chcrnifuminescence
{470 ,ugem)l,
—
Standards
Sulfur Pioxide'
Annual Average
KW3 p0m)
24 flour
0.05 ppm
365 ug/m,3
031 ug/m))0
Cond'uctimetho
(0 f4 parol
Paraosao111ne
Method
Method' .
3 bout
r
1300 u9/m3
_
(0 5 Pprh)
1 h our
05 ppm
'31 10 ugamtf
Suspended "
Annual Geometric
60 ug.rmt
75 ug/m3
60 ug/W
Particulate
Matter
Mean
High Volume
High' Volume
�4 hour
100 ug/m3260
Sampling
ug °m
150 ug/mJ
Sam piing
S'uffates
24 hour
25 'tug/m!
AWL Method
--
_
No 61
-
Lead
3() day
i 5 ug/en3
AIHL Method
-
Average
f to. 54
Calendar,
�uacter
-
-
T:5 ttg/ms
1,5 ug/ntt
Atomic
Absorption
Hydrogen
1 hour
V03 fpm
-- - ---mom ---
Suffide
f42trg1A
ydra+erdeStracta
Method
Nydrlyenrbrsris -
(Corrected for
hour
f ti 9 a m 1
1 E0 ug/m
10,2 ; ppmx
Same as
primary
Flame 1onlzauon
Detection Using'
Methane)
Standards
Gas Chromatography.
Vinyf Chfortde
.24 hour
0�010 pom
Gas Chromatog•
(G`hloroethene)
rtohy,,rARk1-staff
rt'Por� ?f}-i3�1
EtfxylAne
8 hcux
4y ��d
1: hour
0 S
Vlsibittty
1.,otiservahon
In sufficient 04%ount to tS1
Reducing
redace its pravii(�r#q+�asrbtirty
Particles
to Irss:fhan 1)' ft-, Ps 'he thr»
--
reftt , t� umidlty� s test ifran ?q-I.'
F. .,.
,4t'PLICABLE ONLY I "Y.fiE`LAK TAH0 AIR:OA$IN.-..
CaodnMonoxide; hour .�
Gppnx® 1f.D;Fi
�fn
.�s
Vrstif,ty
1 otrservt n
suttr.Cfonto ounf to Is) '
Reducmg
rrdurG+:thc� nrry; +i ng v;`,i7rt ik
Particles
`.,
to task Khan SMS rni�vi whet, the -
rCtairtL h
n urttsrhtY`tStI=SIIh.tn �0�
�
f GbiPtO r�:S ON REEVERS SIDS)i
I O L i
.:
1.-
California standards are values that are
6
National Secondary,Standards: The
not to be equaled or exceeded
levels of air -_quality necessary to;
protect the public welfare from any
2.
'National standards; other than those
known, or'anticipated adverse
j
based on, annual averages: or annual,effects
of a pollutant. Each state
geometric means, are not to be
must attain the secondary standards
exceeded more than once per 'Year.
4rithin a "reasonable time" after
implementation plan. is approved by
3.
Concentration expressed first in
the EPA,
units in which it *was ,promulgated.
Equivalent units given in parentheses
7,.
Reference method as described. by
are based upon a r-ference temperature
the EPA: An "equivalent method"
of 250C: and a reference pressure of
of measurement may be used but must
760 mm of mercury; All Measurements;
have a "consistent relationship to
of air quality are'.o be corrected tbthe
reference: method" and must be
a reference temperature of 25500 and a
approved by the EPA.
reference pressure or" 760 mm of Hg
a
(l, 013.2 millibar); l.pm in this table
8,.
Prevailing visibility is defined as
ref e$ toL ppm by vol=,e, or micromoles
the greatest visibility which is
of Pollutant per mole of gas;;
attained or surpassed.around, at
n
least half of the horiton circle,
4
Any equivalent procedure which, can ;be
but not necessarily in continuous
shown to ;the Satisfaction of the Air
sectors.
Resources Board to ',give=_, oquival,ent
results at or near the lavel of the
9,.
At locations Where the state
air quality standard may be used.
standards for oxidant and/or
suspended particulate matter are
5.
National Primary Standa;,ds: The levels
violated National standards
of air'quality neeassa,ry with an
apply elsewhere.
adequate margin of safety; to, 'Pt tett
the public healthi Each state must
10.
!%ensured as ozone.
attain the: primary standards no later
than three years: after that staters
implementation plan is approved by the
Environmental 'T'rotecti,an ;agency: (E�Aj .
S®c« 24-126. PA-C (Planne.d Area-Cluster)one.
(A.�tll' it
), pose; `The sr PA-C axone is iritended td tocilitate the
development of ventexs
of resldential or light cammercixl
activities or a combination thereof and related uses without
regard to the traditional li nitatiol>s on lot size, road frontage,
setback, side yards and: rear yards. Said Zane is to ba applied
only to areas determined to be suitable for suchh uses, a,s,
evidenced by a developmentplan to be submitted ley the;appli-,
"
rant to the p4inning commission, and tc) be evaluated bys
reference to existing and proposed Mnd uses, the county gen-
'
eral plan and any appheable precise ,filatls„ The final develop- _
rnent plan, as approved, by the board of supervisors, shall be
binding on the developer or subsequent Ovnera as regulations
fox land uses within the zone. Deviations from the said plan
(except minor deviations -which do tloi increase the density:
or intensity of any use, change the character ;of any use
or introduce any ,neir uses) shall require rezoning in accord-
ante with an amended development plri,n. Further, said zone'`
should be applied' only where its peripheral boundaries can `
be adequately into -rated with the surrounding public road
system. and surrounding zones without creating; nuisances
from noise,; fumes, C019estlo i or other causes:
- (B) Uses per'Mitted. .
1
() Those uses vilich are pLrinitted in the C-X (Light Com-
mercaal) District without the.necessity of securing a use
T
permit;
(9—.) Service stations.
(G) Uses Vroliit "ited:.All other uses of land riot specifically '
authorized under .section 24-1,26(A) above ate pt`e+hibited
`
(1)) Lot There shall be no setbaelk, side yard,
^
rear yard, .or lot width or front:tire, requirements in areas
zoned PA-G, Provide(,however, that Where a Pei-C zone
abuts asingle- or meiltill-f, anilyr residential zone, elle setljacl:
requirements of the abutting residential zone in: existence
at the timPIA
-C the P -G z6ne application is acted upon 'by,' the
planning. commission snail apply. to that,porti on of the cluster
zotltY ;ilnng the boundarycomrtYon to the cluster and resideuti-al
xono; provided fu,rthor, ho0 0vor, thst 110 Structu:I°e ti-itItill
a VA-C zoie shall be located vVIthin ten (1,O)� canlTlian
_a
property line: between the P A-C' zone and an abutting single
pr multiple residential .gone.
,
()lccess'retZttireats; Access to each lot ar to the co1n-
anon area serving said" Tait shall be pror�ideo in accordan, ee
t�•itlt tilt rerluiremCxrts of 'Ohaptet the Putte 'Comity
Coda including 0101 imprvenlettt staiidards set forth in';the
resolution of standtsa•rls adopted purs�ian the eta.
Vehiclilar tend pedestrlanmovenjent in said cluster parcel
adtquale� for' nth* use intended slxlli be, evidenced by rights-
of-Away or easemenl�S granted on .n finial SlkbtllVislaI7 nlap:or
rights-of-ways' or emi:6ingli granted by sellnl�:tte i ,�trument
pursuant to approval of the boa d, of -:x �nerr cars. t3i�siraiale
rhinimqm width, bf ai:y such ease �'ietlt is twenty, (�(7) feet. ;.
(r) Lot co e'Auge XO lot 0010:1i considererl tog'oth6r tiv th
its prol).Ortionate sharo of tiny eontmon spacep shill( be per-
tnittevl building; coverage greater' than that permitted in the
-1 Zane for art tqual sI; lot used for the slime ptlrpase.'
m,.