HomeMy WebLinkAboutExhibit 4EXHIBIT 4
Shuttle Analysis
qA
20RA53[f CI AIRS. !NC.
3C pX BCL`T!YB PARK. SUIYB 900
iRVF4E CALIFORNIA 9261,
November 6, 2007
Mr. Keeton Kretzer
Keeton Kretzer Consulting
17291 Irvine Boulevard, Suite 305
Tustin, California 92780
RF.RXP.LBY FORT COLLINS
949553.0666 TEL CARLSRAD PALM SPRING.
949.533.9076 FAX COL MA POINT RI<EMOAD
Subject: Hoag Health Center Shuttle Bus Trip Increase
Dear Mr. Kretzer:
R lv gR B!DH
HOCSL!N
SAN IV" 680610
LSA Associates, Inc. (LSA) has reviewed the potential effects on noise and air quality from the
increase in shuttle bus trips from two to four per hour between Hoag Health Center and Hoag Hospital.
The following summarizes LSA findings regarding the shuttle bus trip increase.
1. Proposed Change
The project proposes a shuttle service that will consist of a 20 passenger van that will provide shuttle
service for physicians and patients between Hoag Hospital and Hoag Health Center between the hours
of 7 :00 a.m. and 7:00 p.m. The shuttle shall be used only by physicians who have offices in the Hoag
Health Center and patients at Hoag Hospital. The shuttle shall be used by patients visiting physicians
at Hoag Health Center who require further medical services such as lab work, x -rays and medical tests
to be provided at Hoag Hospital. Originally the shuttle will be limited to two round trips per hour
between the two facilities. It is now proposed to have four shuttle trips per hour.
Due to the increase in shuttle trips, the number of private passenger vehicle trips would be reduced.
Assuming each shuttle trip would replace I private passenger vehicle trips from physicians and/or
patients, the additional two shuttle trips an hour would increase the daily shuttle trips by 24 but reduce
the private passenger vehicle trips by 120 trips per day.
2. Air Quality
The California Air Resources Board issued the latest emission prediction model, EMFAC2007, which
Provides the current and projected vehicle emissions in many areas of California. The EMFAC2007
model provides emission factors for criteria pollutants for current and future years.
Based on the above assumption, Table A shows that total emissions from the reduced private
passenger vehicle trips would be more than offset the increase in the increase associated with the
increase in the shuttle trips. There will be a reduction in all criteria pollutants as well as the greenhouse
vLey N[Nq I ENY-RONM6RTAL SCIENCRS I DESInN (RJtl
-4
LSA ASSOCIATES. ;NC.
gases (CO2) as a result of the increase in shuttle trips and reduction in private passenger vehicle trips
between Hoag Health Center and Hoag Hospital,
Tabby A: Emission Change Associated with Shuttle Trips and Private Passenger Vehicle Trips
Obsiday)
�uange w ` ROC NOx Sox PMio
in Daily
E.liii
rnva[e 14U- j I6 0.70 i 1.9 - 0.016 0.15 0.1I
Passenger II
— - - -v.vv -i.w - U.U133 -0.1
Assumes an increase of 2 shuttle trips per hour between 7 a.m. and 7 p.m.
2 Assumes a reduction of 10 vehicle trips per shuttle trip increase.
Source: LSA Associates, Inc.
3. Noise
Similarly, because of the potential with reduction of private passenger vehicle trips as a result of the
increase in shuttle trips between Hoag Health Center and Hoag Hospital, traffic noise associated with
project trips along the roadway segments between these two facilities would be slightly lower.
Similarly, the noise in the parking lot and loadinghutloading areas at these two facilities would also
change slightly. However, the difference would be small and not discernible by the human ear. No
change in the findings identified in the noise impact analysis (LSA, September 2007) would occur.
Please let me know if you have any questions regarding the above analysis on the shuttle bus trip
increase.
Sincerely,
LSA ASSOCIATES, INC.
TT62nung, P&
Principal
�o