Reed College Canyon

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

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)

Sampling sitea

Canyon

GPS coordinates (W,N)b

Elevation (ft)

Particulate count (particles/cm3)c

2

No

45.47940,-122.62923

137

57154

3

No

45.47902,-122.62846

142

21251

4

No

45.47927,-122.62753

135

9061

5

No

45.47933,-122.62592

139

10369

6

No

45.47936,-122.62374

163

12107

7

No

45.47939,-122.62288

171

53184

8

No

45.47985,-122.62283

198

9754

9

Yes

45.48132,-122.62375

193

9439

10

Yes

45.48119,-122.62411

175

8924

11

Yes

45.48094,-122.62443

175

8362

12

Yes

45.48101,-122.62469

138

8702

13

Yes

45.48109,-122.62518

114

8072

14

Yes

45.48091,-122.62550

166

9560

15

Yes

45.48101,-122.62608

157

9086

16

Yes

45.48124,-122.62640

141

9158

17

Yes

5.48144,-122.62665

144

9159

18

Yes

45.48160,-122.62650

127

8608

19

Yes

45.48207,-122.62614

105

8544

20

Yes

45.48220,-122.62624

115

9262

21

No

45.48119,-122.63284

126

8791

22

No

45.48242,-122.62505

131

8548

23

Yes

5.48252,-122.62641

93

7730

24

Yes

45.48249,-122.62688

86

8713

25

Yes

45.48208,-122.62954

81

8723

26

Yes

45.48214,-122.63039

73

8457

27

Yes

45.48249,-122.63167

121

8958

28

Yes

45.48240,-122.63242

104

7936

29

No

45.48191,-122.63290

123

16071

30

No

45.48119,-122.63284

126

8791

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).