Reed College Canyon

Valuing the Benefits of Ecosystem Services Generated by the Reed Canyon Restoration Project: 1999-2009

Index | Executive Summary | 1 | 2 | 3 | 4 | References | Appendix A | Appendix B | Appendix C | Appendix D | Appendix E

Appendix E: Techniques and Particulate Sampling Data

Total suspended particulate data was collected using a handheld condensation particle counter borrowed from Jimmy Radney at PSU. Issues with this were: 1) the device measures only ultrafine particles (PM1), and so aren’t comparable to EPA standards that mandate PM2.5 and PM10, 2) it was difficult getting a consistent reading. The readings would flicker each time a car drove by. The attempt was made to record an average quantity, but a greater time period is suggested for future research.

Table 3: Atmospheric concentrations of total suspended particulate matter (less than one micrometer)

^a Sampling sites were selected randomly in an effort to create a distributive range of data inside and outside the canyon

^bGPS coordinates and elevation measured using a GPS; the coordinates used a WGS84 datum.

^c Measurements were done using a the hand-held Condensation Particle Counter, Model 3007; the TSP count is a direct recording of the device’s readings. The effort was made to choose an average reading over a 2-minute period at each site.

The average TSP measurement for the sampling sites inside the canyon is 8744 particles/cm³ is statistically lower than the average TSP measurement for the sampling sites outside of the canyon is 21134 particles/cm³ (ANOVA, F=3.8354, df=2, 26, P < 0.0347).

There was not a significant relationship between elevation and TSP (ANOVA, F=1.0643, df=1, 28, P < 0.3114). There is not a significant relationship between sampling site location inside or outside the canyon and elevation (ANOVA, F=1.1010, df=2, 28, P < 0.3476).

Index | Executive Summary | 1 | 2 | 3 | 4 | References | Appendix A | Appendix B | Appendix C | Appendix D | Appendix E