Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Naturally Occurring Asbestos
El Dorado Hills
Multimedia Exposure Assessment
Preliminary Assessment and Site Inspection Report Interim Final
5.0 Summary of Investigative Efforts (cont'd)
5.4 Air Sampling
5.4.2.6 Jackson Elementary School
The START conducted activity-based air sampling during three scenarios at the garden and outdoor classroom, the grass-covered playing field, and two paved play areas. Because the paved play areas selected for the activity were physically separate from one another, the START placed additional high-flow air sample pumps in stationary positions in each area, but only operated them within each area for the 1 hour of the scenario when activity was conducted there.
Table 5-26 New York Creek Nature Trail Jogging/Walking Scenario B Air Sample Summary Results |
||||||
Sample ID | Location | Location Description | Date | PCME Structures (s/cc) | AHERA-like Total Structures (s/cc) | Sensitivity (s/cc) |
JOGB-H2-1TR-100704 | JOGB-1TR | trail position #JOG1 hi-vol | 10/07/04 | 0.00290 | 0.00484 | 0.000968 |
JOGB-H2-2TR-100704 | JOGB-2TR | trail position #JOG2 hi-vol | 10/07/04 | 0.00288 | 0.00288 | 0.000959 |
JOGB-H2-12TR-100704 | JOGB-2TR | duplicate of trail position #JOG2 hi-vol | 10/07/04 | <0.00291 | 0.00292 | 0.000974 |
JOGB-H2-3TR-100704 | JOGB-3TR | trail position #JOG3 hi-vol | 10/07/04 | 0.000975 | 0.000975 | 0.000975 |
JOGB-H2-4TR-100704 | JOGB-4TR | trail position #JOG4 hi-vol | 10/07/04 | <0.00293 | 0.00393 | 0.000982 |
JOGB-H2-5TR-100704 | JOGB-5TR | trail position #JOG5 hi-vol | 10/07/04 | 0.000980 | 0.00490 | 0.000980 |
JOGB-L2-1AD-100704 | JOGB-1AD | adult #1 | 10/07/04 | 0.00701 | 0.0280 | 0.00100 |
JOGB-L2-2AD-100704 | JOGB-2AD | adult #2 | 10/07/04 | 0.0159 | 0.0458 | 0.000995 |
JOGB-L2-12AD-100704 | JOGB-2AD | duplicate of adult #2 | 10/07/04 | 0.0110 | 0.0330 | 0.00100 |
JOGB-L2-3AD-100704 | JOGB-3AD | adult #3 | 10/07/04 | 0.0441 | 0.123 | 0.00227 |
JOGB-L2-4AD-100704 | JOGB-4AD | adult #4 | 10/07/04 | 0.00792 | 0.0158 | 0.000990 |
JOGB-L2-5AD-100704 | JOGB-5AD | adult #5 | 10/07/04 | 0.00598 | 0.0179 | 0.000997 |
JOGB-L2-1NA-100704 | JOGB-1NA | non-active adult | 10/07/04 | <0.00295 | 0.00591 | 0.000985 |
PCME fibers = fibers longer than 5 microns with a width between 0.25 and 3 microns, and an aspect ratio (length to width) greater than 3:1 AHERA-like total structures = structures longer than 0.5 microns with an aspect ratio greater than 3:1 (Note this differs somewhat from the strict AHERA structure definition) Sensitivity = the sample-specific lowest concentration of asbestos the laboratory can reliably detect s/cc = structures per cubic centimeter |
Garden and Outdoor Classroom. The START collected samples to test the moisture level of the soil just prior to conducting the scenario at the Garden and Outdoor Classroom (see Table 5-7: Moisture Levels in Activity Area Soils).
Region 9 NewsroomRegion 9 Programs | Grants & FundingUS-Mexico Border | Media CenterCareers | About Region 9A-Z Index |