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CORRESPONDENCE_2008 (1/08 TO 6/08)
Environmental Health - Public
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EHD Program Facility Records by Street Name
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4400 - Solid Waste Program
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PR0440003
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CORRESPONDENCE_2008 (1/08 TO 6/08)
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Last modified
4/27/2021 2:38:57 PM
Creation date
7/3/2020 11:06:28 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
4400 - Solid Waste Program
File Section
CORRESPONDENCE
FileName_PostFix
2008 (1/08 TO 6/08)
RECORD_ID
PR0440003
PE
4434
FACILITY_ID
FA0003698
FACILITY_NAME
CORRAL HOLLOW LANDFILL
STREET_NUMBER
31130
STREET_NAME
CORRAL HOLLOW
STREET_TYPE
RD
City
TRACY
Zip
95376
APN
25303010
CURRENT_STATUS
01
SITE_LOCATION
31130 CORRAL HOLLOW RD
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
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SJGOV\cfield
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FilePath
\MIGRATIONS\SW\SW_4434_PR0440003_31130 CORRAL HOLLOW_2008.tif
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EHD - Public
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Mr. Dan Johnson <br />December 21, 2007 <br />Page 2 <br />At higher concentrations, methane is flammable. However, the presence of methane gas in site <br />soil does not mean there is an immediate threat of explosion because flames cannot typically <br />propagate through soil. <br />SURFACE EMISSIONS MONITORING <br />On November 14, 2007, surface emissions monitoring was performed over the surface of the <br />subject site. The intent of the monitoring was to identify any specific locations or areas of the <br />landfill surface with organic compound concentrations exceeding SJVAPCD Rule 4642 <br />threshold limit value of 1,000 ppmv measured as methane. <br />EMISSIONS TESTING INSTRUMENTATION/CALIBRATION <br />Instruments used to perform the landfill surface emission testing consisted of the following: <br />Landtec SEM -500 portable Flame Ionization Detector (FID). This instrument <br />measures methane in air over a range of 1 to 50,000 ppmv. The SEM -500 meets <br />SJVAPCD requirements and was calibrated in accordance with Rule 4642 Section <br />6.1.1.1 test methods. <br />Instrument calibration logs are shown in Attachment 1. <br />SURFACE EMISSIONS MONITORING PROCEDURES <br />Surface emissions monitoring was conducted in accordance with SJVAPCD Rule 4642 Section <br />6.1.1.2. Monitoring was performed with the SEM -500 inlet held within 3 inches of the landfill <br />surface while a technician walked a grid in parallel paths not more than 90 feet apart over the <br />surface of the landfill. Cracks, holes and other breaks in the surface were also tested. Surface <br />emissions readings were monitored approximately every 30 seconds and recorded if they exceed <br />1,000 ppmv. <br />Recorded wind speed results are shown in Attachment 2. Wind speed averages were observed to <br />remain below 10 miles per hour and no instantaneous speeds exceeded 15 miles per hour. No <br />rainfall had occurred within 72 hours of the monitoring events. Therefore, site meteorological <br />conditions were within modified Rule 4642 requirements on the test date (see attached waiver <br />letter). <br />TESTING RESULTS <br />Landfill surface emissions monitoring showed no exceedance of Rule 4642 threshold limit of <br />1,000 ppmv. The highest reading detected was 398 ppmv (Near LFG Extraction Well No. EW - <br />37), which is well below the 1,000 ppmv limit. Results of monitoring are shown on Figure 2 in <br />Attachment 2. Based on these results no additional testing is recommended at this time. <br />
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