PG&E Hunters Point Power Plant Cleanup Project
Pacific Gas & Electric
HUNTERS POINT POWER PLANT CLEANUP PROJECT
Naturally-Occurring Asbestos Air Monitoring Results October 21 through November 2, 2011
Running Total of Work Days during the Hunters Point Power Plant Project Cleanup Phase: 436 Running Total of Work Days with Results At or Above the Trigger Level: 56
Date |
Work Area & Air Monitor Above Trigger |
Results of All Air Monitors (s/cc) |
Min & Max Wind Speed / Wind Direction |
Activities in Area of Monitor(s) Above Trigger |
Activities in Other Areas |
Response Action |
Thu. 10/27 |
Area B |
AMS1= 0.0032 |
1-11 mph/ N, NW |
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AMS2= |
AMS2= 0.0176 |
2-11 mph/ N, NW |
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0.0176 |
AMS3= 0.0022 |
0-12 mph/ NW |
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AMS4= 0.0056 |
3-16 mph/ W, NW |
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Area A |
AMS6U= 0.0493 |
1-11 mph/ NW |
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AMS6U= |
AMS6D= 0.0077 |
0-11 mph/ NW |
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0.0493 |
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Fri. 10/28 |
No Results Above the Trigger Level. |
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Sat 10/29 |
Area A |
AMS1= 0.0021 |
0-4 mph/ E, NE |
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AMS6U= |
AMS2= 0.0043 |
0-6 mph/ N, NW |
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0.0162 |
AMS3= 0.0010 |
0-3mph/ SE |
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AMS4= 0.0042 |
1-9 mph/ NE |
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AMS6U= 0.0162 |
0-5 mph/ N, NW |
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AMS6D= 0.0021 |
0-5 mph/ N, NW |
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Mon. 10/31 |
Area A |
AMS1= 0.0011 |
2-15 mph/ N, NW |
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AMS6U= |
AMS2= 0.0043 |
1-17 mph/ N, NW |
activities. |
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0.0268 |
AMS3= 0.0044 |
2-17 mph/ N, NW |
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AMS4= 0.0011 |
0-17 mph/ NW |
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AMS6U= 0.0268 |
2-15 mph/ N, NW |
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AMS6D= 0.0068 |
2-15 mph/ N, NW |
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Tue. 11/1 |
Area C/D |
AMS1= 0.0011 |
0-17 mph/ N, NW |
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(2) application of soiltac at the end of each shift.
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AMS4= |
AMS2= 0.0075 |
0-11 mph/ N, NW |
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0.0161 |
AMS3= 0.0011 |
0-12 mph/ NE |
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AMS4= 0.00161 |
0-11 mph/ NW |
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Area A |
AMS6U= 0.0043 |
0-15 mph/ N, NW |
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AMS6D= |
AMS6D= 0.5422 |
0-15 mph/ N, NW |
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0.5422 |
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Wed. 11/2 |
No Results Above the Trigger Level |
Glossary & Notes
- Trigger level –0.016 structures per cubic centimeter (s/cc). When results above the trigger level necessitate adaptation of on-site dust control measures, work is only resumed in an area once air monitoring results for a full work day demonstrate conditions in the area are back under the trigger level.
- Air monitoring now takes place on a 24-hour basis. Results are taken beginning at 5 p.m. on the day prior to the day indicated on the chart. For example, data for Friday is measured from 5 p.m. on Thursday to 5 p.m. on Friday.
- Site maintenance activities such as daily dust mitigation activities, air monitoring activities and storm water management are not listed in the table. Wind direction is relative to plant north (parallel to Evans Ave).
- On Wednesday, November 2, sampling time for one monitor (AMS4) is "from ~5 pm 11/1 to 3:30 pm 11/2" due to a disruption of power.
