My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
SU0007300
EnvironmentalHealth
>
EHD Program Facility Records by Street Name
>
R
>
RIVER
>
26292
>
2600 - Land Use Program
>
QX-89-0002
>
SU0007300
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
10/29/2020 3:08:38 PM
Creation date
9/9/2019 9:06:31 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
RECORD_ID
SU0007300
PE
2656
FACILITY_NAME
QX-89-0002
STREET_NUMBER
26292
Direction
E
STREET_NAME
RIVER
STREET_TYPE
RD
City
ESCALON
APN
24722019
ENTERED_DATE
7/29/2008 12:00:00 AM
SITE_LOCATION
26292 E RIVER RD
RECEIVED_DATE
7/28/2008 12:00:00 AM
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
Scanner
SJGOV\wng
Supplemental fields
FilePath
\MIGRATIONS\R\RIVER\26292\QX-890002\SU0007300\CORRESPOND.PDF
Tags
EHD - Public
Jump to thumbnail
< previous set
next set >
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
629
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
SCANNED <br /> the potential for sleep disturbance. It establishes a threshold for a single event for <br /> which the A-weighted sound exposure level (ASEL) which occurs within a room <br /> at 50 dBA and not 65 dBA as described in the report. The ANSI procedure <br /> calculates the probability of awakening based upon the interior mean SEL and the <br /> number of events which occur during the nighttime hours (10:00 p.m. — 7:00 <br /> a.m.). The ANSI procedure for estimating the probability of awakening calculates <br /> a 97% probability of awakening, based upon an exterior SEL of 79 dBA and 182 <br /> truck trips during the nighttime period, as indicated in the BAC report. This is <br /> clearly a major difference in the overall analysis. <br /> The potential for 182 heavy truck trips passing by at a distance of less than 60 feet <br /> from a residence during a typical night, and not having a major impact on sleep <br /> disturbance does not pass the test of being an intuitively reasonable analysis. <br /> B. The BAC report utilizes the noise measurement data collected at Sites A and B to <br /> isolate the asphalt plant noise levels. This process was used to determine the <br /> potential noise levels during nighttime operations. The report concludes that the <br /> asphalt plant noise levels will be between 35 and 45 dB Leq. First off, the noise <br /> measurement locations do not accurately represent potential noise levels at the <br /> elevated residences. This is due to the fact that the noise measurement sites used <br /> for evaluating the asphalt plant operations were located in depressions. <br /> In addition,since the noise measurement data used to extrapolate the asphalt plant <br /> operations were due to daytime asphalt plant operations, and were collected at a <br /> distance of over 2,000 feet from the plant, the expected nighttime noise levels, <br /> due to atmospheric conditions could increase by as much as 5 dBA to 10 dBA. <br /> j.c. brennan & associates, Inc. staff have had first-hand experience in measuring <br /> industrial noise sources during the daytime and nighttime hours. It has been well <br /> documented that industrial noise sources during the daytime hours may not even <br /> be audible at distances of 2,000 feet. However, during the nighttime hours, the <br /> noise levels associated with these sources will increase by 10 dBA due to <br /> atmospheric conditions. Therefore, we do not believe that the asphalt batch plant <br /> noise levels have accurately been identified. An accurate method for evaluating <br /> asphalt plant noise levels is to run the plant during the nighttime hours, and <br /> collect noise level data during the operations. This would provide an accurate <br /> representation of potential noise impacts. At the very least, reference noise level <br /> measurements of the asphalt plant should have been conducted on the Munn <br /> Perkins site. These reference measurements could have been used to generate <br /> noise contours associated with the operations. The noise level data can be used as <br /> direct inputs into a model which can account for prevailing wind direction, wind <br /> speed, temperature,atmospheric conditions and topography. <br /> C. The BAC report provides a discussion on "Optimization of Heavy Truck <br /> Operating Parameters to Minimize Passby Noise". This analysis provides <br /> good insight into the variations in operating conditions and how they affect the <br /> noise generated by the trucks. However, the education of individuals on the use <br /> 2 <br />
The URL can be used to link to this page
Your browser does not support the video tag.