03 DIR-2006-04 Nelson Liu
CITY OF CUPERTINO
10300 Torre Avenue, Cupertino, California 95014
DEPARTMENT OF COMMUNITY DEVELOPMENT REPORT FORM
Application:
Agenda Date:
Applicant:
Owner:
Location:
DIR-2006-04, EA-2006-0S
March 15,2006
Nelson Lui (California Water Service)
California Water Service
North Portal Avenue, 100 feet North of Drake Drive
APPLICATION SUMMARY:
Director's Minor Modification with a referral to the Planning Commission to
install a new drinking water well in an existing drinking well station
BACKGROUND:
California Water Service owns an existing, .79 acre drinking well site at the north
terminus of Portal A venue, adjacent to 1-280. The site is accessed by an easement
off of Portal Avenue. A second well and supporting equipment are proposed to
provide additional water supply for the Cupertino area. The site is surrounded
by single-family residences to the west and south and 1-280 to the north (see
Exhibit A). The new well requires a modification to the original use permit, l-U-
65. The zoning is Agricultural (A-I), which allows quasi-public uses as
conditional uses.
DISCUSSION:
The plan set shows the existing and proposed site conditions. The existing site
consists of an underground well, concrete aerator basin, two chemical storage
sheds, a panel board, piping and landscaping (see Project Description and photos
in Exhibit B and the plan set). The proposed site conditions will add a new
underground well, piping, panel board and booster pumps with acoustical
shelters. Impacts connected with the project are:
Noise
A noise consultant prepared a report that identifies existing and project noise
impacts and mitigations (Exhibit C), which are summarized in the matrix below.
3--1
DIR-2006-04, EA-2006-05
Page 2
NOISE SOURCE
1-280
NOISE LEVEL dBA
(Cupertino noise standard
is 65 daytime and 55
ni htime*
67 (AM Highest Ambient)
59 M Hi est Ambient
54 (at Drake Avenue
property line)
47 (at Drake Avenue back
yards)
53 (at N. Portal Avenue
property lines)
PROPOSED
MITIGATION AND
NOISE LEVEL
NA
Oose the openings of
the pump enclosures,
reduces noise levels 4-
5 dB for existing units.
Absorbing materials of
rnetal enclosure
structures, reduces
noise levels 2-3 dB.
Oose the small
openings of the new
enclosures, reduces
noise levels 1-2 dB.
Barrier to wrap around
air-conditioning unit
on back of chemical
um enclosure.
Construction Not known Six measures are
e ui ment ro osed see re ort
*Noise consultant's report cites the standards as 60 daytime and 50 nightime. However,
Cupertino's code enforcement department interprets that the source of the noise, in this case non-
residential, sets the standard.
Existing
equipment
Existing and
proposed
equipment
57 (at Drake Avenue
property line)
50 (at Drake Avenue back
yards)
54 (at N. Portal Avenue
property lines)
The noise report concludes that, with the freeway noise, even at night the
minimum traffic noise is equivalent to or higher than the pumping equipment
noise. However, the consultant proposes mitigation measures that will reduce
noise emissions to cornply with Cupertino's noise ordinance, as shown above.
The Environmental Review Committee recommends that a construction
management plan be prepared that specifies construction hours, truck access
routes, noise mitigation and dust control measures. A condition to this effect has
been included in the model resolution.
Hazardous Materials
The hazardous materials of sodium hypochlorite and aqueous ammonia, used
for disinfectant of drinking water, are inside a chemical storage shed. The
hazardous nature of these chemicals is that they could come in contact with
3~;Z
DIR-2006-04, EA-2006-05
Page 3
personnel working on the property. The applicant states that experienced
trained operators will minimize the changes, and the chemicals are housed in a
locked structure.
Visual Impacts/Landscapin~
The new structures will have minimal visual impacts. However, not all the
landscaping that was originally approved along the west property line is
currently in place. Additional screening is proposed as part of this application.
In addition, staff believes that a solid wood fence would provide better visual
and acoustical mitigation for the properties on the west property line. A
condition is proposed requiring a solid wood fence on the west property line.
Three trees are proposed to be removed to provide access for construction of the
new well. The Environmental Review Committee recommends that tree removal
be further evaluated to determine if the trees could be saved, particularly the
large pine. Prior to issuance of grading or building permits, a condition of
approval requires an evaluation of the trees by the City's consulting arborist to
determine their health and options to removal, such as pruning.
Enclosures:
Model Resolution
Exhibit A - Aerial
Exhibit B - Project Description and Photos
Exhibit C - Noise Consultant Report
Initial Study and Recommendation of Environmental Review Committee
Plan Set
Prepared by: Ciddy Wordell, City Planner c::::::::. J
Approved by: Steve Piasecki, Director of Community Developme~
G:p1anningjPDREPORT j 2006jDIRjDIR-2006-04
3-3
DIR-2006-04 .
CITY OF CUPERTINO
10300 Torre Avenue
Cupertino, California 95014
MODEL RESOLUTION
OF THE PLANNING COMMISSION OF THE CITY OF CUPERTINO
APPROVING A REFERRAL OF A DIRECTOR'S MINOR MODIFICATION TO INSTALL A
NEW DRINKING WATER WELL IN AN EXISTING DRINKING WELL STATION
LOCATED AT N. PORTAL AVENUE 100 FEET NORTH OF DRAKE DRIVE
SECTION I: FINDINGS
WHEREAS, the Planning Commission of the City of Cupertino received a referral of a
Director's Minor Modification permit, as described in Section II of this Resolution; and
WHEREAS, the necessary public notices have been given in accordance with the Procedural
Ordinance of the City of Cupertino, and the Planning Commission has held one or more
public hearings on this matter; and
WHEREAS, the applicant has met the burden of proof required to support said application;
and has satisfied the following requirements:
1) The proposed use, at the proposed location, will not be detrimental or injurious to
property or improvements in the vicinity, and will not be detrimental to the public health,
safety, general weIfare, or convenience;
2) The proposed use will be located and conducted in a manner in accord with the
Cupertino Comprehensive General Plan and the purpose of this title.
NOW, THEREFORE, BE IT RESOLVED:
That after careful consideration of maps, facts, exhibits, testimony and other evidence
submitted in this matter, the application for Use Permit is hereby recommended for approval,
subject to the conditions which are enumerated in this Resolution beginning on Page 2 thereof;
and
That the subconclusions upon which the findings and conditions specified in this resolution
are based and contained in the public hearing record concerning Application No. DIR-200S-
17 as set forth in the Minutes of the Planning Commission Meeting of March 15, 2006 and are
incorporated by reference as though fully set forth herein.
?J~/
Resolution No.
Page 2
DIR-2006-04
March 15,2006
SECTION II: PROTECT DESCRIPTION
Application No.:
Applicant:
Location:
DlR-2006-04
Nelson Lui (California Water Service)
N Portal Avenue, 100 feet north of Drake Drive
SECTION III: CONDITIONS ADMINISTERED BY THE COMMUNITY DEVELOPMENT
DEPT.
1. APPROVED EXHIBITS
Approval is based on the plan set titled: Station 34 Plot Plan and Elevation, dated 9-21-
05, except as may be amended by the conditions contained in this resolution.
2. NOISE MITIGATION
Noise mitigation measures recommended in the Noise Consultant Report for the project
and its construction shall be provided. In addition, a solid wood fence shall be installed
on the west property line prior to issuance of grading or building permits.
A construction management plan shall be provided for approval by the Director of
Community Development that includes construction hours, truck access, noise
mitigation and dust control measures.
3. TREE PROTECTION AND LANDSCAPING
All the trees shown on the plan set in the vicinity of the new well shall be protected
during construction. Prior to any grading or building permit approval, a tree
protection bond in the amount of $10,000 is required for all protected trees. The bond
shall be released prior to final occupancy subject to a report from the City Arborist
indicating that the trees are in good condition.
Trees shown on the plan set for removal shall be evaluated by the City Arborist to
determine their health and options to removal. The Director of Community
Development shall determine if rernoval is necessary to implement the project.
Replacement trees shall be required for any tree removal, type and size to be
determined by the Director of Community Development.
4. NOTICE OF FEES, DEDICATIONS, RESERVATIONS OR OTHER EXACTIONS
The Conditions of Project Approval set forth herein may include certain fees, dedication
requirements, reservation requirements, and other exactions. Pursuant to Government
Code Section 66020(d) (1), these Conditions constitute written notice of a statement of
the amount of such fees, and a description of the dedications, reservations, and other
exactions. You are hereby further notified that the 90-day approval period in which you
may protest these fees, dedications, reservations, and other exactions, pursuant to
Government Code Section 66020(a), has begun. If you fail to file a protest within this 90-
day period complying with all of the requirements of Section 66020, you will be legally
barred from later challenging such exactions.
?r5
Exhibit B
Project Title: New Drinking Water Well
Project Location:
1. Station 34
2. N. Portal Avenue and lOO feet north of Drake Drive in Cupertino.
3. Latitue:37.3321 North, Longitude 122.0180 West
Project Sponsors Name and Address:
California Water Service Company
1720 North First Street
San Jose, CA 95112
Proiect Description:
California Water Service Company (CWSC) proposes to install a new well in an existing
well station in Cupertino, California to assist in meeting the municipal water supply for
the Cupertino area. The new will be drilled to an estimated 800 feet. The well is
estimated to produce approximately 1,500 to 2,000 gallon per minute of water.
The new well will include the following components and/or activities:
(I) There are two existing storage sheds that are 8 feet by 8 feet by 8 feet each, there are
on a cement foundation that is 18 feet by 10 feet.
(2) There will be minimum site grading. The site already developed as a well station.
There is base rock on a large section of the site.
(3) There is general landscaping on the site.
(4) The one of the existing storage sheds contains a 300 gallon of 12.5% by weight
sodium hypochlorite in a polyethylene tank which is secondary contained. The
sodium hypochlorite is compatible with the material of construction of the container.
(5) The second existing storage shed contains a 55 gallon stainless steel container of
19.5% by weight of aqueous ammonium hydroxide. The 55 gallon container is
within a secondarily contained structure. The aqueous ammonium hydroxide is
compatible with the material of construction.
(6) The site will include new electrical panel boards and two 4 feet wide by 4 feet long,
by 7 feet high booster pumps with acoustical shelters.
(7) There is an existing 40,000 gallon concrete aerator basin on site
The well will be equipped with a 150-200 horsepower motor running a vertical turbine
water lube pump. The well water will be deposited into the existing 40,000 gallon
concrete aerator basin. The well piping will be connected to the existing concrete basin
by saw cutting, drill and epoxy dowels, and cast in place piping. The portable water will
be distributed into the distribution system by a 100 horsepower vertical turbine booster.
The booster piping will also connect to the concrete aerator basin by the same method as
the production well piping above. Additional new piping will be reconfigured along with
the old piping to bring both the new well and the existing well sources to a modified
chlorine and ammonia injection point prior to distribution.
?;-/b
During the construction phase of the project best management practices will be used for
the discharge of the well development water. Since there are no known contaminants
other than sediments, two baker tanks with weirs will be on-site to filter out the sediments
generated during well development. The approximate size of the tanks are 16 feet high
by 30 feet in length by 10 feet in wide (18,000 gallon capacity). The tanks are temporary
and will located on the north side ofthe lot.
Surroundinl! Land and Uses:
The existing well site is located in a residential area. The property is surrounded by
residential properties and city streets. To the north and east of the property is interstate
280. To the south and west of the property is single family residential areas. The closest
cross streets are N. Portal Ave to the west of the property and Drake Drive 100 feet south
of the property.
Aesthetics:
The property is located in a developed residential area with no evidence of scenic vista
being impacted. The project site does not contain trees, rock outcroppings, and historice
buildings with a state ~cenic highway. The site is currently being used as a drinking
water pumping station and is located in a developed residential area. There will not be a
pennanent source oflight as a result of the project that will produce glare during the day
and nighttime views in the area.
Hazards and Hazardous Materials:
The site will contain 300 gallons of 12.5% by weight sodium hypochlorite and 19.5% by
weight aqueous ammonia used for disinfectant of drinking water. These chemicals will
be stored in secondary contained structures inside a chemical storage shed. These
chemicals are injected through a mechanical structure downstream of the well. Ifis
possible that the sodium hypochlorite and aqueous ammonium hydroxide may come in
contact with the environment and personnel working on the property. However, past
projects and experience, along with experienced trained operators will minimize the
chances. The chemicals are housed in a locked structure.
The project will not emit any hazardous materials, substances, or waste within one-
quarter mile of an existing or proposed school.
Traffic:
There will be a temporary increase in traffic during the construction phase due to material
being moved to and from the site. There will be a slight pennanent increase in traffic
because ofthe need to transport chemical the 12.5% sodium hypochlorite and the 19.5%
aqueous ammonium hydroxide. In addition, CWSC staff will visit the site on a daily
basis. The site will have adequate parking capacity anticipated to occur on a daily basis.
Ý/'l
Environmental Consulting Services 18488 Prospect Road - Suite I, Saratoga, CA 95070
Phone: (408) 257-1045 stanshe1l99@toast.net FAX: (408) 257-7235
January 18,2006
Ms. Ciddy Wordell
City Planner
10300 Torre Avenue
Cupertino, CA 95014-3255
EXHIBIT C
Re: Noise Assessment and Mitigation Study - New pump installation,
California Water Service (CWS) Station 34, N. Portal Avenue, Cupertino
Dear Ms. Wordell,
At your request I have perfonned a study of the potential noise impacts 1T0m the new pump
equipment to be installed on the subject CWS property. This report includes:
· measurements of ambient noise and noise fTom the existing pump
equipment
· description of nearby residential receptor locations
· results of the noise analysis of the proposed new equipment installation
· relevant City of Cupertino noise ordinance standards
· general recommendations for mitigation measures to allow compliance
with the City noise ordinance for operation and construction
AMBIENT NOISE MEASUREMENTS
Ambient noise measurements were made on the property without any pump equipment running
during the morning of January 5, 2006, and again near the entrance to the property about midnight on
January 11,2006, with a CEL-440 Precision Noise Meter and Analyzer, calibrated with a B & K Model
4230 Sound Level Calibrator. The measurements are shown in Exhibit ¡ below. Noise levels were
measured and are reported using percentile noise descriptors: Ù)O (the background noise level exceeded 90
% of the time), L50 (the median noise level exceeded 50% of the time), L¡ (the peak level exceeded 1% of
the time), and Leq (the average energy-equivalent noise level). The measurements use A-weighting
(commonly abbreviated dBA) to de-emphasize the low fTequencies and high lTequencies to match human
hearing sensitivity. Community noise readings typically are taken using dBA, and most noise ordinance
standards are specified in dBA, including the City of Cupertino Noise Ordinance.
EXHIBIT 1
AMBIENT NOISE LEVELS (dBA)
Station 34 - Cal Water Service, Cupertino
Period 40 LSO Leq L¡
Mid-morning 63 64 64 67
Midnight 53 55 56 59
The ambient noise levels at the project location are produced almost entirely by traffic on the
adjacent 1-280 fTeeway, on the other side of a 10-foot property line masonry wall. From the lack of
3-1c;
Noise Impact and Mitigation Study, Cal Water Service, Cupertino
Page 2 of 4
variability in the noise level measurements, it is clear that a high-level relatively steady noise ambient exists
on the site throughout the day and night. Even late at night the minimum noise level, represented by L90, is
53 dBA
NEARBY RESIDENTIAL RECEPTORS
The CWS site is triangular, with the Junipero Serra channel and 1-280 ITeeway along the long
northeast side. Sharing the property line on the south side are several residential properties on Drake Drive.
The houses are set back approximately 25 feet ITom a 6-foot wood property line fence. Sharing the
property line on the west side are several residential properties at the north end of North Portal Avenue.
These houses are set back about 25 feet from a chain link property line fence.
MEASURED PUMP NOISE LEVELS
Because of the high background traffic noise on site, individual equipment measurements at
relatively close distances were necessary. Turning on all equipment and measuring at the property line
would not distinguish the equipment noise from the traffic noise. Hence noise levels for the existing
electrical water pumping equipment were made separately. The existing equipment includes a 75-HP well
pump and a 50-HP booster pump in partial enclosures (metal enclosures on two sides and grating on the
other two sides), and an air conditioning unit on the back of one of the two chemical pump installations in
full wooden enclosures. These well pump, booster pump, and AC units were measured individually in
nonnal operation. The two enclosed chemical pump installations could not be turned on and measured
individually. However, because of their full acoustic enclosures, the fàct that they never make continuous
noise, even when the other pumps are on continuously, and no changes are proposed for these two items, it
is felt that measuring them was not siguificant to the study. The results of the measurements perfonned are
shown in Exhibit 2 below.
EXHIBIT 2
STATION 34 PUMP NOISE LEVELS (dBA) -10 feet
Equipment Noise Level Distance to
property lines (ft.)
Well pump 70 85-90
Booster pump 68 45-50
AC on pump house 61 45
To detennine the overall noise levels ITom all equipment running, their separate noise levels were
calculated at the two property lines and added. Based on the distances and individual noise levels, the
worst-<:ase property line noise levels from the existing equipment operating together (without ambient
noise) would be 54 dBA at the Drake Avenue property line, and 47 dBA in the back yards behind the
wooden fence. Existing equipment noise levels without background noise would be 53 dBA at the property
line in the back yards on N. Portal Avenue (since there is no wood fence on the property line). So with the
ITeeway noise, even at night the minimum traffic noise is equivalent to or higher than the pumping
equipment noise.
Environmental Consulting Services
Saratoga
g~;2()
Noise Impact and Mitigation Study, Cal Water Service, Cupertino
Page 3 of 4
ANTICIPATED NEW EQUIPMENT NOISE LEVELS TO BE PRODUCED
The CWS proposal would add another well pump of 100-125 HP, located 42 feet from the Drake
residential property line and 160 feet from the North Portal residential property line. This pump will be
installed with a full acoustic enclosure having minimal openings, which is expected to reduce its noise level
to 63-65 dBA at 10 feet. In addition, a new 50 HP booster pump would be installed near the existing
booster pump, also in an acoustic enclosure, which would reduce its noise level to 55-56 dBA at 10 feet.
To detennine the overall noise levels from all equipment installed and running simultaneously, their
separate noise levels were added at the two property lines. The worst-case property line noise levels from
the equipment operating together (without ambient noise) would be 57 dBA on Drake Avenue property line,
and 50 dBA in the back yards behind the wooden fence. In the back yards on N. Portal Avenue, equipment
noise levels would be 54 dBA. So with the freeway noise levels, if all equipment was needed and
operating simultaneously at night, the minimum traffic noise would be equivalent to or higher than the
pumping equipment noise.
COMPLIANCE WITH CITY OF CUPERTINO NOISE ORDINANCE
ÜDerational Noise. Cupertino Noise Ordinance, section 10.48.040, requires noise sources to be 60
dBA or less on a residential property during daytime hours, 8 am to 8 pm, and 50 dBA during the remaining
nighttime period. The new CWS equipment would be fully in compliance with the 60 dBA daytime limit.
At night the equipment is calculated to be somewhat above the Noise Ordinance limit of 50 dBA, but since
the ambient traffic noise is approximately the same noise level or higher, the pump equipment would not be
expected to create a disturbance. However, it is my understanding that the City requires CWS to mitigate
the equipment noise levels to meet City night time ordinance standards. Note that measurement of
compliance with the ordinance in this type of situation would not be possible in the presence of the high
background noise.
Construction Noise. Section 10.48.053 requires that daytime demolition and construction activities
must have no equipment producing more than 87 dB at 25 feet, and the overall noise level at any nearby
property must be less than 80 dBA.
RECOMMENDED MITIGATION MEASURES - OPERATIONAL NOISE
To comply with Cupertino requirements, the following methods for mitigation of pump equipment
noise are recommended:
I. Close openings - Close the openings for the four existing and new pump enclosures on
the sides of the enclosures facing the two residential property lines. The openings can
be closed with at least 112" marine plywood, or heavy sheet metal (1/16"). In the case
of the existing metal partial enclosures, closing the openings on the sides facing the
residential properties can reduce the noise levels 4-5 dB for the existing units, and 1-2
dB for any small openings in the new enclosures.
2. Absorbing materials - The existing metal enclosure structures do not absorb much
pump noise, so noise now bounces around until it goes out an opening. To reduce
noise reverberation and hence the outside noise levels about 2-3 dB, the interior walls,
and ceiling should be covered with at least I 112" thick semi-rigid (stiff) fiberglass
panels (not batts). These can be obtained from several vendors, such as Owens
Coming Fiberglas (800-438-7465), or perhaps at Home Depot, Lowe's, or a similar
local construction supplies store.
Environmental Consulting Services
Saratoga
3~;Lf
Noise Impact and Mitigation Study, Cal Water Service, Cupertino
Page 4 of 4
3. Partial barrier - Construct a solid 7 foot high wood or masonry barrier about 15 feet
long that wraps partly around the air conditioning unit on the back of the chemical
pump enclosure. The barrier could be located about 6-8 feet from the AC unit between
it and the North Portal residential property line.
The mitigation measures described above would reduce the worst-case pump equipment noise to
strictly comply with Cupertino noise ordinance limits in both adjacent residential areas.
RECOMMENDED MITIGATION MEASURES - CONSTRUCTION NOISE
I. Choose construction equipment that is of quiet design, has a high- quality muffler system, and is
well maintained. This includes trucks used to haul materials.
2. Install superior mufflers and engine enclosure panels as needed on gas, diesel or pneumatic impact
machines.
3. Erect temporary plywood enclosures around equipment or activity areas that produce significant
noise at nearby receptors.
4. Restrict construction hours to nonnaI daytime hours.
5. Eliminate unnecessary idling of machines not in use.
6. If possible, locate equipment as far from sensitive receptors as possible.
If you require additional infonnation or assistance, please do not hesitate to contact me.
Respectfully submitted,
y~ ;;;(v.-e~
H. Stanton Shelly ~
Acoustical Consultant
Board Certified Member (1982)
Institute of Noise Control Engineering
Environmental Consulting Services
Saratoga
3 -,2::/
·
~
CITY OF
CUPEIQ1NO
City of Cupertino
1 0300 Torre Avenue
Cupertino, CA 95014
(408) 777-3251
FAX (408) 777-3333
Community Development Department
;'~1~~5~~I~1iI~~¡j~R~~Æ~~ýí~?i~M~~~,I~kl~~~~Ti9Æ~R~1E~ŒY~fJf~:z:¡:n
taff Use Only
EA File No.
EA-2006-05
ase File No. DIR-2006-04
ttachments Noise Report
PROJECT DESCRIPTION:
Project Title: Director's Minor Modification with a
referral to the Planninq Commission to install a new drinkinq water well in an
existinCl drinkinCl well station
Project Location: N. Portal Avenue. 100 feet North of Drake Drive
Project Description:
see above
Environmental Setting:
Existinq water well site. 1-280 to the north. sinqle familv residential in remaininq
directions
PROJECT DESCRIPTION:
Site Area (ac.) - .79 ac. Building Coverage - % Exist. Building -_sJ. Proposed
Bldg. - sJ. Zone - G.P. Designation-
Assessor's Parcel No. -
If Residential, UnitslGross Acre -
Total# RentallOwn Bdnns
Total sJ.
Price
Unit Type #1
Unit Type #2
Unit Type #3
Unit Type #4
Unit Type #5
Applicable Special Area Plans: (Check)
o Monta Vista Design Guidelines
o
S. De Anza Conceptual
o
N. De Anza Conceptual
o
S. Sara-Sunny Conceptual
o
Stevens Crk Blvd. Conceptual
o
Stevens Creek Blvd. SW & Landscape
If Non-Residential, Building Area - sJ. FAR - Max.
EmployeeslShift - _Parking Required Parking Provided
Project Site is Within Cupertino Urban Service Area - YES 0 NO 0
:?-~3
A. CUPERTINO GENERAL PLAN SOURCES
1. Land Use Element
2. Public Safety Element
3. Housing Element
4. Transportation Element
5. Environmental Resources
6. Appendix A- Hillside Development
7. Land Use Map
8. Noise Element Amendment
9. City Ridgeline Policy
10. Constraint Maps
B. CUPERTINO SOURCE DOCUMENTS
11. Tree Preservation ordinance 778
12. City Aerial Photography Maps
13. "Cupertino Chronicle" (Califomia History
Center, 1976)
14. Geological Report (site specific)
15. Parking Ordinance 1277
16. Zoning Map
17. Zoning Code/Specific Plan Documents
18. City Noise Ordinance
18b City of Cupertino Urban Runoff Pollution
Prevention Plan
C. CITY AGENCIES Site
19. Community Development Dept. List
20. Public Works Dept.
21. Parks & Recreation Department
22. Cupertino Water Utility
D. OUTSIDE AGENCIES
23. County Pianning Department
24. Adjacent Cities' Planning Departments
25. County Departmental of Environmental
Health
D. OUTSIDE AGENCIES (Continued)
26. Midpeninsula Regional Open Space District
27. County Parks and Recreation Department
28. Cupertino Sanitary District
29. Fremont Union High School District
30. Cupertino Union School District
31. Pacific Gas and Electric
32. Santa Clara County Fire Department
33. County Sheriff
34. CAL TRANS
35. County Transportation Agency
36. Santa Clara Valley Water District
36b Santa Clara Valley Urban Runoff Pollution
Prevention Program
36c San Jose Water Company
E. OUTSIDE AGENCY DOCUMENTS
37. BAAQMD Survey of Contaminant
Excesses
38. FEMA Flood Maps/SCVWD Flood Maps
39. USDA, "Soils of Santa Clara County"
40. County Hazardous Waste Management
Plan
41. County Heritage Resources Inventory
42. Santa Clara Valley Water District Fuel
leak Site
43. CalEPA Hazardous Waste and
Substances Site
43b National Pollutant Discharge Elimination
System (NPDES) Municipal Stormwater
Discharge Permit Issued to the City of
Cupertino by the San Francisco Bay
Regional Water Quality Control Board
43c Hydromodification Plan
F. OTHER SOURCES
44. Project Plan Set/Application Materials
45. Field Reconnaissance
46. Experience w/project of similar
scope/characteristics
47. ABAG Projection Series
A. Complete all information requested on the Initial Study Cover page. LEAVE BLANK SPACES
ONLY WHEN A SPECIFIC ITEM IS NOT APPLICABLE.
B. Consult the Initial Study Source List; use the materials listed therein to complete, the checklist
information in Categories A through O.
C. You are encouraged to cite other relevant sources; if such sources are used, job in their titie(s}
in the "Source" column next to the question to which they relate.
D. If you check any of the "YES" response to any questions, you must attach a sheet explaining the
potential impact and suggest mitigation if needed.
E. When explaining any yes response, label your answer clearly (Example "N - 3 Historical") Please
try to respond concisely, and place as many explanatory responses as possible on each Daae.
F. Upon completing the checklist, sign and date the Preparer's Affidavit.
G. Please attach the following materials before submitting the Initial Study to the City.
'/Project Plan Set of Legislative Document
'/Location map with site clearly marked
(when applicable)
BE SURE YOUR INITIAL STUDY SUBMITTAL
IS COMPLETE - INCOMPLETE MATERIALS
MAY CAUSE PROCESSING DELAY
'3-:2'f
EVALUATION OF ENVIRONMENTAL IMPACTS:
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I. AESTHETICS .- Would the project:
a) Have a substantial adverse effect on a 0 0 0 ŒJ
scenic vista? [5,9,24,41,44]
b) Substantially damage scenic resources, 0 0 0 ŒJ
including, but not limited to, trees, rock
outcroppings, and historic buildings within a
state scenic highway? [5,9,11,24,34,41,44]
c) Substantially degrade the existing visual 0 0 0 ŒJ
character or quality of the site and its
surroundings? [1,17,19,44]
d) Create a new source of substantial light or 0 0 0 ŒJ
glare, which would adversely affect day or
nighttime views in the area? [1,16,44]
II. AGRICULTURE RESOURCES: In
determining whether impacts to agricultural
resources are significant environmental
effects, lead agencies may refer to the
California Agricultural Land Evaluation and
Site Assessment Model (1997) prepared by
the California Dept. of Conservation as an
optional model to use in assessing impacts
on agriculture and farmland. Would the
project:
a) Convert Prime Farmland, Unique 0 0 0 ŒJ
Farmland, or Farmland of Statewide
Importance (Farmland), as shown on the
maps prepared pursuant to the Farmland
Mapping and Monitoring Program of the
California Resources Agency, to non-
agricultural use? [5,7,39]
b) Conflict with existing zoning for 0 0 0 ŒJ
agricultural use, or a Williamson Act
contract? [5,7,23]
c) Involve other changes in the existing 0 0 0 ŒJ
environment which, due to their location or
nature, could result in conversion of
Farmland, to non-agricultural use? [5,7,39] --
3 -:;25
~--_. ._-~-,.._~- - -- :----
>0'" C'" 0 cë
_c c: c: ..
-01'" 0101 001 0101'" 't)
.!! u u .c (.) ._.... .cuu
ISSUES: ...¡¡::~ 1-;;1åO I- .- 01 o 01
C ._ rþ.-'- Clc.. U):: Q. zc..
[and Supporting Information Sources] ,ScE rþ c iit.-.. rþ c E E
o CI_ G)CI ~o G) .21-
..J.- ::ãiE U
Q.II) II) .E ..JII)
III. AIR QUALITY - Where available, the
significance criteria established by the
applicable air quality management or air
pollution control district may be relied upon
to make the following determinations. Would
the project:
a) Conflict with or obstruct implementation of 0 0 0 ŒJ
the applicable air quality plan? [5,37,42,44]
b) Violate any air quality standard or 0 0 0 ŒJ
contribute substantially to an existing or
projected air quality violation? [5,37,42,44]
c) Result in a cumulatively considerable net 0 0 0 ŒJ
increase of any criteria pollutant for which
the project region is non-attainment under an
applicable federal or state ambient air quality
standard (including releasing emissions
which exceed quantitative thresholds for
ozone precursors)? [4,37,44]
d) Expose sensitive receptors to substantial 0 0 0 ŒJ
pollutant concentrations? [4,37,44]
e) Create objectionable odors affecting a 0 0 0 ŒJ
substantial number of people? [4,37,44]
IV. BIOLOGICAL RESOURCES -- Would
the project:
a) Have a substantial adverse effect, either 0 0 0 ŒJ
directly or through habitat modifications, on
any species identified as a candidate,
sensitive, or special status species in local or
regional plans, policies, or regulations, or by
the California Department of Fish and Game
or U.S. Fish and Wildlife Service?
[5,10,27,44]
b) Have a substantial adverse effect on any 0 0 0 ŒJ
riparian habitat or other sensitive natural
community identified in local or regional
plans, policies, regulations or by the
California Department of Fish and Game or
US Fish and Wildlife Service? [5,10,27,44]
c) Have a substantial adverse effect on 0 0 0 ŒJ
l(;¡Qe!~IIY.l'!.~ected_wetland~~s defifled..b1____ --.--- -~_.- n_________________ .. - ------.- -------------
3-X
..-----------..- - ~.._-- ~._.__.,----~-- ~-
»- 0 cë
_c c'E c:;:
-01- 01 01 0 01 0101_ -
.!!! u u ..c u..c.- ... .cuu u
ISSUES: -r¡::~ 1-¡¡:....1išO 1-.- 01 o 01
C ._ tJ .-.- CIc- CI) ~ Q, ZC-
[and Supporting Information Sources] CD c E tJ c 3=.-'" tJ C E E
Õ .2'- G)tD ~o CD.~-
...J'- :::iE U
!I..(/) (/) C ...J(/)
Section 404 of the Clean Water Act
(including, but not limited to, marsh, vernal
pool, coastal, etc.) through direct removal,
filling, hydrological interruption, or other
means? [20,36,44]
d) Interfere substantially with the movement 0 0 0 ŒJ
of any native resident or migratory fish or
wildlife species or with established native
resident or migratory wildlife corridors, or
impede the use of native wildlife nursery
sites? [5,10,12,21,26]
e) Conflict with any local policies or 0 0 0 ŒJ
ordinances protecting biological resources,
such as a tree preservation policy or
ordinance? [11,12,41]
f) Conflict with the provisions of an adopted
Habitat Conservation Plan, Natural 0 0 0 ŒJ
Community Conservation Plan, or other
approved local, regional, or state habitat
conservation plan? [5,10,26,27]
V. CULTURAL RESOURCES -- Would the
project:
a) Cause a substantial adverse change in 0 0 0 ŒJ
the significance of a historical resource as
defined in §15064.5? [5,13,41]
b) Cause a substantial adverse change in 0 0 0 ŒJ
the significance of an archaeological
resource pursuant to §15064.5? [5,13,41]
c) Directly or indirectly destroy a unique 0 0 0 ŒJ
paleontological resource or site or unique
geologic feature? [5,13,41]
d) Disturb any human remains, including 0 0 0 ŒJ
those interred outside of formal cemeteries?
[1,5]
VI. GEOLOGY AND SOILS - Would the
project:
a) Expose people or structures to potential
substantial adverse effects, including the risk
of loss, injury, or death involving:
i) Rupture of a known earthquake fault, as 0 0 0 ŒJ
?J'27
í-----·--m ---~..-.._~~_._-- ,- ~--
>0'" c'" 0 c'"
_c c c; C
-01'" 01 01 001 ns ca .... ...
.!!! u u .cu .-.... .cUU U
ISSUES: ....- ~ 1-¡¡::=1ao .....- 01 001
c~ 1/)'-.- CIIC. I/):!:c. zc.
[and Supporting Information Sources] GI c E I/) c ;:.- .. I/) C E E
õ.~- DC) ::0 GI CII_ -
...J.- :æ U
a. I/) I/) .5 ...JI/)
delineated on the most recent Alquist-Priolo
Earthquake Fault Zoning Map issued by the
State Geologist for the area or based on
other substantial evidence of a known fault?
Refer to Division of Mines and Geology
Special Publication 42. [2,14,44]
--
ii) Strong seismic ground shaking? 0 0 0 ŒJ
[2,5,10,44]
iii) Seismic-related ground failure, including 0 0 0 ŒJ
liquefaction? [2,5,10,39,44]
iv) Landslides? [2,5,10,39,44] 0 0 0 ŒJ
b) Result in substantial soil erosion or the 0 0 0 ŒJ
loss of topsoil? [2,5,10,44]
c) Be located on a geologic unit or soil that is 0 0 0 ŒJ
unstable, or that would become unstable as
a result of the project, and potentially result
in on- or off-site landslide, lateral spreading,
subsidence, liquefaction or collapse?
[2,5,10,39]
d) Be located on expansive soil, as defined 0 0 0 ŒJ
in Table 18-1-B of the Uniform Building Code
(1997), creating substantial risks to life or
property? [2,5,10]
e) Have soils incapable of adequately 0 0 0 ŒJ
supporting the use of septic tanks or
alternative waste water disposal systems
where sewers are not available for the
disposal of waste water? [6,9,36,39]
VII. HAZARDS AND HAZARDOUS
MATERIALS - Would the project:
a) Create a significant hazard to the public or 0 0 ŒJ 0
the environment through the routine
transport, use, or disposal of hazardous
materials? [32,40,42,43,44]
b) Create a significant hazard to the public or 0 0 0 ŒJ
the environment through reasonably
foreseeable upset and accident conditions
involving the release of hazardous materials
into the environment? [32,40,42,43,44]
c) Emit hazardous emissions or handle 0 0 0 ŒJ
3~7D
-------~- --_._._~---,------ ~._- __,"u.u_ u_
>0,- 0 c~
_c c ~ c +::
-os- os OS 0 OS os os- -
.!!! u u .cu .-.. .cuU to)
ISSUES: -.- ~ 1-c¡::;'So I- .- os o os
c:t: 11)'-.- ClC. U) :t: Q. zc.
[and Supporting Information Sources) CD C E t/) C ;;=._"- II) C E E
Õ .21- CD CI :!::: 0 CD .21-
.....- :¡¡u
0..1/) I/) C ....1/)
hazardous or acutely hazardous materials,
substances, or waste within one-quarter mile
of an existing or proposed school?
[2,29,30,40,44]
d) Be located on a site which is included on a D D D ŒJ
list of hazardous materials sites compiled
pursuant to Government Code Section
65962.5 and, as a result. would it create a
significant hazard to the public or the
environment? [2,42,40,43]
e) For a project located within an airport land D D D ŒJ
use plan or, where such a plan has not been
adopted, within two miles of a public airport
or public use airport, would the project result
in a safety hazard for people residing or
working in the project area? [ ]
f) For a project within the vicinity of a private D D D ŒJ
airstrip, would the project result in a safety
hazard for people residing or working in the
project area? [ ]
g) Impair implementation of or physically D D D ŒJ
interfere with an adopted emergency
response plan or emergency evacuation
plan? [2,32,33,44]
h) Expose people or structures to a D D D ŒJ
significant risk of loss, injury or death
involving wildland fires, including where
wildlands are adjacent to urbanized areas or
where residences are intermixed with
wildlands?[1,2,44]
VIII. HYDROLOGY AND WATER QUALITY
-- Would the project:
a) Violate any water quality standards or D D D ŒJ
waste discharge requirements? [20,36,37]
g ~;;2f¡
~...__.._~~._~-----,.._---_._----_.- ~~ ---..- . ~___~__ ~m_
».... c.... 0 c....
- c c c;: C
-«G1:) «G«G O«G «G«G.... 1:)
.! u -Cu .-... .cuu
ISSUES: ....;;:: ~ I-cc=ßiO I-;;::«G o «G
c._ U¡.-.- tIICL u¡.- CL ZCL
[and Supporting Information Sources] III C E u¡ C ;;=.-.. u¡ C E E
Õ .2'- III tII ~ 0 III.!:!'-
..J .- :æ; U
o..rJ rJ .= ..JrJ
.
b) Substantially deplete groundwater 0 0 ŒJ 0
supplies or interfere substantially with
groundwater recharge such that there would
be a net deficit in aquifer volume or a
lowering of the local groundwater table level
(e.g., the production rate of pre-existing
nearby wells would drop to a level
which would not support existing land uses
or planned uses for which permits have been
granted)? [20,36,42]
e) Create or contribute runoff water which 0 0 0 ŒJ
would exceed the capacity of existing or
planned stormwater drainage systems or
provide substantial additional sources of
polluted runoff? [20,36,42]
f) Otherwise substantially degrade water 0 0 0 ŒJ
quality? [20,36,37]
g) Place housing within a 100-year flood 0 0 0 ŒJ
hazard area as mapped on a federal Flood
Hazard Boundary or Flood Insurance Rate
Map or other flood hazard delineation map?
[2,38] .
h) Place within a 1 DO-year flood hazard area 0 0 0 ŒJ
structures which would impede or redirect
flood flows? [2,38]
i) Expose people or structures to a significant 0 0 0 ŒJ
risk of loss, injury or death involving flooding,
including flooding as a result of the failure of
a levee or dam? [2,36,38]
j) Inundation by seiche, tsunami, or 0 0 0 ŒJ
mudflow? [2,36,38]
IX. LAND USE AND PLANNING - Would
the project:
a) Physically divide an established 0 0 0 ŒJ
community? [7,12,22,41]
b) Conflict with any applicable land use plan, 0 0 0 ŒJ
policy, or regulation of an agency with
jurisdiction over the project (including, but
not limited to the general plan, specific plan,
local coastal program, or zoning ordinance)
~Etec for t~~se of avoidi~ .--.- L~_____.._._.. _......_.~_-'_______._ -----.--..
:? - 3.)
-- n -----0 -r
»-
_C cë c:¡:: cë
-01- cans OftS CUea... ...
.!!! u u ..c (.) .-... .c (.) CJ (.)
ISSUES: -.- ~ I-¡¡::;'œ 0 J-¡¡: ca 0 co
t:~ 1I)·-·!iClQ. II).-Q. zQ.
[and Supporting Information Sources] CII C E II)C :;:¡(¡ II)cE E
õ.!2'- CII CI .- U CII CI_ -
11.(/ ..J ¡¡) :æ C ..J ¡¡)
mitigating an environmental effect?
[1,1,8,16,17,18,44]
c) Conflict with any applicable habitat D D D ŒJ
conservation plan or natural community
conservation plan? [1,5,6,9,26]
X. MINERAL RESOURCES -- Would the
project:
a) Result in the loss of availability of a known D D D ŒJ
mineral resource that would be of value to
the region and the residents of the state?
[5,10]
b) Result in the loss of availability of a D D D ŒJ
locally-important mineral resource recovery
site delineated on a local general plan,
specific plan or other land use plan? [5,10]
XI. NOISE -- Would the project result in:
a) Exposure of persons to, or generation of, D ŒJ D D
noise levels in excess of standards
established in the local general plan or noise
ordinance, or applicable standards of other
agencies? [8,18,44]
b) Exposure of persons to or generation of D D D ŒJ
excessive groundborne vibration or
groundborne noise levels? [8,18,44]
c) A substantial permanent increase in D D ŒJ D
ambient noise levels in the project vicinity
above levels existing without the project?
[8,18]
d) A substantial temporary or periodic D D D ŒJ
increase in ambient noise levels in the
project vicinity above levels existing without
the project? [8,18,44]
e) For a project located within an airport land D D D ŒJ
use plan or, where such a plan has not been
adopted, within two miles of a public airport
or public use airport, would the project
expose people residing or working in the
project area to excessive noise levels?
[8,18,44]
f) For a project within the vicinity of a private D D D ŒJ
:8~:3
~_._._--~_.._._--- ----,.- ,-----.- -~_._--- '---,
>0," 0
_C c:~ c;; c~
-",.. «I «I 0 «I co: tiS ..., ..
.!!! u u .l:u .-- .l:UU u
ISSUES: "¡¡:a J-t¡:=1ã 0 I-t¡: co: o '"
C ._ II)·-·i Cl)c. 11).- c. zc.
[and Supporting Information Sources] GI C E II)c .-- cE E
õ.~- at C> ~ 0 fh c>_
o.( ) ..J¡¡j ::¡¡; g j¡¡j
airstrip, would the project expose people
residing or working in the project area to
excessive noise levels? [8,18]
XII. POPULATION AND HOUSING -- Would
the project:
,
a) Induce substantial population growth in an D D D ŒJ
area, either directly (for example, by
proposing new homes and businesses) or
indirectly (for example, through extension of
roads or other infrastructure)? [3,16,47,44]
b) Displace substantial numbers of existing D D D ŒJ
housing, necessitating the construction of
replacement housing elsewhere? [3,16,44]
c) Displace substantial numbers of people, D D D ŒJ
necessitating the construction of
replacement housing elsewhere? [3,16,44]
XIII. PUBLIC SERVICES
a) Would the project result in substantial
adverse physical impacts associated with the
provision of new or physically altered
governmental facilities, need for new or
physically altered governmental facilities, the
construction of which could cause significant
environmental impacts, in order to maintain
acceptable service ratios, response times or
other performance objectives for any of the
public services:
Fire protection? [19,32,44] D D D ŒJ
Police protection? [33,44] D D D ŒJ
Schools? [29,30,44] D D D ŒJ
Parks? [5,17,19,21,26,27,44] D D D ŒJ
Other public facilities? [19,20,44] D D D ŒJ
XIV. RECREATION --
a) Would the project increase the use of D D D ŒJ
existing neighborhood and regional parks or
other recreational facilities such that
substantial physical deterioration of the
~~Ii!y_v.t()uld occur or be ac~~lerated? --- -
3-3:)
,--------. .--...------
;>,... c'" 0 cë
_c c c;:
-tV... tV tV 0 tV tV tV... ...
.!!! u u .c (.) ._... .cuU u
ISSUES: ....- ~ J-;;1Go ~.- tV o tV
C~ (/).-.- tIIc. CI)~ c.. zc.
[and Supporting Information Sources] CD c E (/) c == ._ ... I/ c E E
õ.!a'- (þCD =0 CD .E'-
Q.(/) ....1.- ::¡¡; U ....I(/)
(/) c
[5,17,19,21,26,27,44]
b) Does the project include recreational 0 0 0 ŒJ
facilities or require the construction or
expansion of recreational facilities which
might have an adverse physical effect on the
environment? [5,44]
XV. TRANSPORTATION/TRAFFIC-
Would the project:
a) Cause an increase in traffic which is 0 0 0 ŒJ
substantial in relation to the existing traffic
load and capacity of the street system (i.e.,
result in a substantial increase in either the
number of vehicle trips, the volume to
capacity ratio on roads, or congestion at
intersections)? [4,20,35,44]
b) Exceed, either individually or cumulatively, 0 0 0 ŒJ
a level of service standard established by the
county congestion management agency for
designated roads or highways? [4,20,44]
c) Result in a change in air traffic patterns, 0 0 0
including either an increase· in traffic levels or ŒJ
a change in location that results in
substantial safety risks? [4,?]
d) Substantially increase hazards due to a 0 0 0 ŒJ
design feature (e.g., sharp curves or
dangerous intersections) or incompatible
uses (e.g., farm equipment)? [20,35,44]
e) Result in inadequate emergency access? 0 0 0 ŒJ
[2,19,32,33,44]
f) Result in inadequate parking capacity? 0 0 0 ŒJ
[17,44]
g) Conflict with adopted policies, plans, or 0 0 0 ŒJ
programs supporting alternative
transportation (e.g., bus turnouts, bicycle
racks)? [4,34]
XVI. UTiliTIES AND SERVICE SYSTEMS -
Would the project:
a) Exceed wastewater treatment 0 0 0 ŒJ
requirements of the applicable Regional
Water Quality Control Board? [5,22,28,36,44]
3-33
-~ - ~-
»- 0 cë
_c c~. 1:;-
-"'- '" '" 0 '" "'",- ~I
.!!! u u .c (.) ._... .cuu
ISSUES: -I;:! 1-;;1ãO 1-... '" o '"
c ... en·"·- ClQ. U)~Q. zQ.
[and Supporting Information Sources] CII c E en c ;:._"- en C E E
õ.!a'- CII CI :!:: 8 CII.!a'-
o.(/) ..Jii) ~ C ...J(/)
. b) Require or result in the construction of 0 0 0 [8]
new water or wastewater treatment facilities
or expansion of existing facilities, the
construction of which could cause significant
environmental effects? [36,22,28,36]
c) Require or result in the construction of 0 0 0 [8]
new storm water drainage facilities or
expansion of existing facilities, the
construction of which could cause significant
environmental effects? [5,22,28,36,44]
e) Result in a determination by the 0 0 0
wastewater treatment provider which serves [8]
or may serve the project that it has adequate
capacity to serve the project's projected
demand in addition to the provider's existing
commitments? [5,22,28,36,44]
f) Be served by a landfill with sufficient 0 0 0 [8]
permitted capacity to accommodate the
project's solid waste disposal needs? I?]
g) Comply with federal, state, and local 0 0 0 [8]
statutes and regulations related to solid
waste? I?]
-.. .---.----- -~- -....-.---
3-3t/
---- ~~------
XVII. MANDATORY FINDINGS OF.SIGNIFICANCE
(To. be cOn\þletedby CitySf:aff) .
a) Does the project have the potential to 0 0 0 ŒJ
degrade the quality of the environment.
substantially reduce the habitat of a fish or
wildlife species. cause a fish or wildlife
population to drop below self-sustaining
levels, threaten to eliminate a plant or animal
community. reduce the number or restrict the
range of a rare or endangered plant or
animal or eliminate important examples of
the major periods of California history or
prehistory? D
b) Does the project have impacts that are 0 0 0 ŒJ
individually limited, but cumulatively
considerable? ("Cumulatively
considerable" means that the incremental
effects of a project are considerable when
viewed in connection with the effects of past
projects, the effects of other current projects.
and the effects of probable future projects)?
D
c) Does the project have environmental 0 0 0 ŒJ
effects which will cause substantial adverse
effects on human beings, either directly or
indirectly? D
PREPARER'S AFFIDAVIT
I hereby certify that the information provided in this Initial Study is true and correct to the
best of my knowledge and belief; I certify that I have used proper diligence in responding
accurately to all questions herein, and have consulted appropriate source references
when necessary to ensure full and complete disclosure of relevant environmental data. I
hereby acknowledge than any substantial errors dated within this Initial Study may cause
delay or discontinuance of related project review procedures, and hereby agree to hold
harmless the City of Cupertino, its staff and authorized agents, from the consequences of
such delay or discontinuance.
Preparer's Signature
.~
(2~ J' /1~1 2{)o?£Jl¿¿:
I
[.i/¿) k! ./Yê ¿¿.
1\"
'?
l//D¡)L¡
tI
Print Preparer's Name
3<36
ENVIRONMENTAL EVALUATION (To be Completed by City Staff)
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED:
The environmental factors checked below would be potentially affected by this project,
involving at least one impact that is a "Potentially Significant Impact" as indicated by the
checklist on the following pages.
0 Aesthetics 0 Agriculture Resources 0 Air Quality
0 Biological Resources 0 Cultural Resources 0 Geology ISoils
ŒJ Hazards & Hazardous ŒJ Hydrology I Water 0 Land Use I Planning
Materials Quality
0 Mineral Resources ŒJ Noise (see attached) 0 Population I Housing
0 Public Services 0 Recreation 0 TransportationlTraffic
0 Utilities I Service 0 Mandatory Findings of
Systems Significance
DETERMINATION:
On the basis of this initial evaluation the Environmental Review Committee (ERC) finds that:
0 The proposed project COULD NOT have a significant effect on the environment, and
a NEGATIVE DECLARATION will be prepared.
ŒJ Although the proposed project could have a significant effect on the environment,
there will not be a significant effect in this case because revisions in the project have
been made by or agreed to by the project proponent. A MITIGATED NEGATIVE
DECLARATION will be prepared. (see attached)
0 The proposed project MAY have a significant effect on the environment, and an
ENVIRONMENTAL IMPACT REPORT is required.
0 The proposed project MAY have a "potentially significant impact" or "potentially
significant unless mitigated" impact on the environment, but at least one effect 1) has
been adequately analyzed in an earlier document pursuant to applicable legal
standards, and 2) has been addressed by mitigation measures based on the earlier
analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT
is required, but it must analyze only the effects that remain to be addressed.
0 Although the proposed project could have a significant effect on the environment,
because all potentially significant effects (a) have been analyzed adequately in an
earlier EIR or NEGATIVE DECLARATION pursuant to applicable standards, and (b)
have been avoided or mitigated pursuant to that earlier EIR or NEGATIVE
DECLARATION, including revisions or mitigation measures that are imposed upon the
proposed project, nothing further is required.
. f // /.'£1 7~ )o-zA¿[fl
Staff Evaluator I
j{J
ERC . airperson
I
3/,p/D0
,
Date
S/~6
Date (
3-3&
MITIGATED NEGATIVE DECLARATION
POTENTIAL ENVIRONMENTAL IMPACTS
Hazardous Materials
The chemicals of sodium hypochlorite and aqueous ammonia are stored on site
for disinfecting the water. They could potentially come in contact with personnel
servicing the site, but the likelihood of prolonged contact is less than significant.
No mitigation required.
Hydrology and Water Quality
The additional well is proposed to supply more water and provide redundancy.
It is not expected to lower the groundwater level; records show that the water
table has been rising since the demise of agricultural uses.
No mitigation required.
Noise
A noise study was conducted to evaluate ambient, existing and projected noise
levels. The project does not exceed that ambient noise level. However, it slightly
exceeds Cupertino's noise standard of 55 dBA nighttime with a 57 dBA
projection at the Drake Avenue property line.
Proposed Mitigation:
~ Close the openings of the pump enclosures
~ Install absorbing materials in the metal enclosure structures
~ Construct a barrier to wrap around the air-conditioning unit on the back
of the chemical pump enclosure
~ Construct a wood fence along the west property line
Six mitigation measures are proposed to reduce construction noise:
~ Choose construction equipment that is of quiet design, has a high-quality
muffler system, and is well maintained. This includes trucks used to haul
materials.
~ Install superior muffles and engine enclosure panels as needed on gas,
. diesel or pneumatic impact machines.
~ Erect temporary plywood enclosures around equipment or activity areas
that produce significant noise at nearby receptors.
~ Restrict construction hours to normal daytime hours.
~ Eliminate unnecessary idling of machines not in use.
~ If possible, locate equipment as far form sensitive receptors as possible.
G:plarming/misc/MmGATED NEGATNE DECLARATION EA-2006-05
3-37
CITY OF CUPERTINO
RECOMMENDATION OF ENVIRONMENTAL REVIEW COMMITTEE
March 8, 2006
As provided by the Environmental Assessment Procedure, adopted by the City Council
of the City of Cupertino on May 27, 1983, as amended, the following described project
was reviewed by the Environmental Review Committee of the City of Cupertino on
March 8, 2006.
PROTECT DESCRIPTION AND LOCATION
Application No.:
Applicant:
Location:
DIR-2006-04 (EA-2006-0S)
Nelson Lui (California Water Service)
N Portal Ave, 100 feet north of Drake Drive
DISCRETIONARY ACTION REQUEST
Director's Minor Modification with a referral to the Planning Commission to install a
new drinking water well in an existing drinking well station
FINDINGS OF THE ENVIRONMENTAL REVIEW COMMITTEE
The Environmental Review Committee recommends the granting of a Mitigated
Negative Declaration finding that the project is consistent with the General Plan and
has no significant environmental impacts. The Environmental Review Committee
recommends additional mitigation rneasures of 1) evaluating the trees proposed for
removal to determine if they can be retained and 2) a construction management plan.
/ s/Steve Piasecki
Steve Piasecki
Director of Community Development
glercjREC EA-2006-05
3 ~3t3
ENGINEERING
o
DEPARTMENT
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