End Hour: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 

Coso Junction TEOM: 696 Great Basin Unified A.P.C.D. 

Hourly TEOM PM10 reading (μg/m3)

1/1/2010 6 7 6 4 5 6 6 6 7 7 5 5 6 6 6 6 4 5 5 6 7 7 1/2/2010 5 6 6 6 7 5 6 8 7 8 7 6 7 9 9 7 5 10 2 4 4 5 1/3/2010 6 7 7 6 7 6 8 7 8 7 6 5 6 13 12 5 15 1 ‐4 2 10 5 1/4/2010 4 5 5 5 5 8 8 19 15 9 9 6 23 10 9 19 5 0 ‐1 3 4 5 1/5/2010 7 10 9 11 14 12 11 9 21 16 8 7 ‐8 3 10 23 4 5 5 7 6 5 1/6/2010 6 8 8 6 6 9 9 7 9 10 14 7 13 14 20 10 5 3 2 5 8 8 1/7/2010 9 8 7 7 6 11 9 10 12 11 22 19 16 13 15 22 8 5 17 6 5 17 1/8/2010 6 6 6 6 6 6 6 9 11 22 15 6 10 20 21 12 26 11 9 6 7 6 1/9/2010 4 5 4 5 4 6 10 9 8 7 7 5 5 7 6 6 6 18 7 6 6 6 1/10/2010 5 8 7 6 6 7 6 8 9 10 7 5 5 6 6 5 4 12 6 7 5 10 1/11/2010 3 4 4 5 5 8 8 9 20 12 7 22 18 15 23 42 16 34 63 12 17 16 1/12/2010 4 6 4 6 16 25 44 28 43 23 34 18 48 23 45 23 22 13 25 10 11 11 1/13/2010 7 13 14 5 5 8 1 6 6 8 3 4 3 1 6 5 6 3 5 5 5 3 1/14/2010 3 3 4 4 4 5 6 5 6 6 2 3 4 4 6 5 5 4 3 4 8 1/15/2010 3 4 4 3 6 5 5 8 13 6 7 6 3 5 9 8 7 6 15 5 8 8 1/16/2010 5 4 4 4 5 5 6 5 6 4 8 3 7 7 7 10 16 6 10 10 6 7 1/17/2010 5 6 6 5 6 7 8 9 10 10 8 7 9 8 10 9 10 12 11 9 9 6 1/18/2010 3 4 4 4 2 7 4 6 5 4 2 1 1 6 5 ‐4 3 16 1/20/2010 16 12 7 6 5 5 3 4 2 3 4 5 1/21/2010 4 2 2 2 3 5 5 4 5 4 1 ‐13 1 3 2 3 3 3 3 4 4 4 1/22/2010 4 5 4 1 5 7 7 8 9 9 8 7 6 9 7 6 3 5 4 5 4 5 1/23/2010 6 5 5 5 6 ‐20 6 7 8 8 7 5 5 6 8 7 4 5 6 4 3 4 1/24/2010 4 4 3 3 5 4 4 6 7 7 6 4 4 5 8 8 5 3 5 6 5 7 1/25/2010 2 4 3 4 4 5 5 4 7 6 4 6 3 8 12 14 6 12 11 5 3 1/26/2010 5 4 3 4 2 5 5 7 6 8 4 5 6 6 6 5 7 6 6 6 7 6 1/27/2010 5 6 5 7 4 5 6 6 7 7 6 4 4 6 7 7 7 7 5 5 5 5 1/28/2010 3 4 4 4 6 4 5 8 7 6 4 5 4 5 5 6 5 5 8 6 6 1/29/2010 4 3 6 4 7 6 7 6 7 6 9 4 5 8 8 8 8 16 4 7 16 5 1/30/2010 4 5 5 4 9 6 14 9 8 8 7 5 6 7 7 7 6 3 6 7 5 6 1/31/2010 6 4 4 5 6 6 5 7 7 6 4 4 4 5 6 8 6 7 5 5 6 6 

Data capture: 94.2%

Hours in period: 744

Maintenance Valid hours: 701 Start Time End Time Ind Audit

Maintenance/Invalidations

1/14/2010 11:00 1/14/2010 11:10 Bi‐weekly Flow Check 2.99 3.05

1/18/2010 18:30 1/20/2010 9:30 Power Outage

1/25/2010 12:15 1/25/2010 12:25 District Audit1/28/2010 15:35 1/28/2010 15:45 Bi‐weekly Flow Check 2.99 3.04

Time Event

Site Events:

1/5/2010 1:00:00 PM H2S Calibration

1/12/2010 11:00:00 AM H2S Calibration1/19/2010 1:00:00 PM H2S Calibration1/20/2010 9:30:00 AM Found power off; Powered ON1/25/2010 2:00:00 PM H2S Calibration

Site Operator: Dan Johnson Key: Hourly: PM10 > 400 Hourly: PM10 = 

PRELIMINARY
End Hour: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 

Coso Junction TEOM: 696 Great Basin Unified A.P.C.D. 

Hourly TEOM PM10 reading (μg/m3)

2/1/2010 4 8 10 4 6 5 7 6 7 6 7 7 9 15 16 13 17 9 8 7 6 5 2/2/2010 7 6 5 4 7 7 5 7 8 7 6 5 5 10 10 11 13 7 18 6 6 7 2/3/2010 12 7 6 26 5 7 7 7 9 7 8 5 6 5 7 7 8 6 7 8 16 37 2/4/2010 10 6 7 7 6 8 6 7 13 37 26 30 20 20 19 20 15 20 19 18 19 2/5/2010 14 12 13 10 10 10 10 10 10 9 8 8 7 7 7 7 6 5 6 7 8 8 2/6/2010 4 4 4 2 6 8 5 1 3 2 3 2 2 3 1 1 2 3 3 3 3 1 2/7/2010 4 3 2 3 5 2 3 4 5 4 5 5 3 4 6 8 4 4 4 5 4 4 2/8/2010 3 4 3 5 5 5 5 7 5 4 4 3 4 7 9 9 6 6 6 4 5 6 2/9/2010 6 6 4 4 5 8 10 10 10 9 8 7 10 8 7 9 11 5 4 4 5 4 2/10/2010 3 4 6 4 5 5 5 4 5 5 3 4 5 5 7 27 ‐8 3 3 2 4 2/11/2010 2 5 6 4 6 6 6 8 9 4 3 4 5 16 18 9 4 3 3 5 4 3 2/12/2010 7 5 5 5 4 5 5 6 6 8 5 7 9 12 16 13 11 ‐2 2 4 5 6 2/13/2010 4 4 5 8 5 5 5 7 9 7 6 5 9 10 10 10 11 3 6 6 6 7 2/14/2010 6 8 6 8 9 9 9 11 11 11 10 11 14 13 20 ‐11 29 10 5 6 7 7 2/15/2010 20 9 8 9 8 8 10 12 11 10 10 12 14 12 14 18 20 5 5 6 10 10 2/16/2010 9 9 10 9 9 11 11 13 13 12 12 15 18 17 18 20 19 13 14 8 9 14 2/17/2010 10 9 10 10 11 11 12 14 13 12 14 13 16 12 25 27 25 17 10 5 8 7 2/18/2010 7 9 8 8 9 9 10 11 10 12 11 20 23 31 17 18 28 8 21 6 17 9 2/19/2010 10 9 10 10 15 23 16 48 33 15 19 30 16 ‐24 47 46 81 27 32 63 19 99 2/20/2010 13 11 12 12 14 15 16 15 14 15 15 16 10 9 27 9 18 51 90 47 5 6 2/21/2010 5 4 5 6 6 5 6 7 11 7 8 13 18 113 174 0 3 10 6 1 3 4 2/22/2010 8 8 6 11 13 9 16 40 18 33 28 22 27 20 18 19 29 17 16 31 8 10 2/23/2010 24 8 10 9 8 19 42 36 19 10 14 13 13 14 15 11 10 11 13 11 18 8 2/24/2010 8 7 9 8 8 19 15 15 11 11 14 22 15 48 51 12 26 11 6 6 6 5 2/25/2010 ‐40 4 4 6 5 6 6 9 8 9 5 7 1 3 11 19 ‐21 37 23 2 29 2/26/2010 8 6 7 7 6 9 12 37 13 9 9 9 13 8 9 11 9 10 6 7 7 9 2/27/2010 15 12 26 12 8 5 5 2 3 3 4 3 2 4 2 3 4 4 4 5 4 2 2/28/2010 4 3 4 5 6 6 8 9 9 7 8 7 8 8 9 8 10 2 3 4 5 3 

Data capture: 99.6%

Hours in period: 672

Maintenance Valid hours: 669 Start Time End Time Ind Audit

Maintenance/Invalidations

2/4/2010 9:05 2/4/2010 9:15 Filter Change / Reset

2/10/2010 10:25 2/10/2010 10:25 Bi‐weekly Flow Check 2.99 3.062/25/2010 19:05 2/25/2010 19:15 Bi‐weekly Flow Check 2.99 3.06

Time Event

Site Events:

2/2/2010 12:45 Data dump.

Site Operator: Dan Johnson Key: Hourly: PM10 > 400 Hourly: PM10 = 

PRELIMINARY
End Hour: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 

Coso Junction TEOM: 696 Great Basin Unified A.P.C.D. 

Hourly TEOM PM10 reading (μg/m3)

3/1/2010 3 4 3 3 4 5 5 6 8 7 6 9 13 ‐5 15 13 5 4 6 7 5 4 3/2/2010 4 4 3 4 5 5 8 11 13 15 14 15 10 8 10 4 8 4 0 8 2 6 3/3/2010 4 5 3 4 4 7 14 11 8 7 8 10 4 1 14 15 17 4 5 27 7 32 3/4/2010 5 4 ‐3 5 5 0 3 12 8 7 7 7 5 6 11 16 11 1 5 24 9 2 3/5/2010 5 14 3 5 5 23 16 26 13 11 18 ‐83 ‐8 ‐6 7 12 9 37 95 45 5 3 3/6/2010 5 4 4 4 7 6 4 7 9 12 14 6 10 2 7 6 6 4 6 4 4 4 3/7/2010 5 5 6 7 10 4 9 13 7 10 6 3 ‐45 ‐36 1 6 11 32 79 25 5 3 3/8/2010 4 4 5 4 5 18 10 17 26 22 9 3 13 ‐30 ‐9 14 22 84 5 5 7 0 3/9/2010 249 3148 201 42 12 11 5 9 196 297 552 256 147 74 22 37 12 4 12 13 12 9 3/10/2010 4 5 3 7 5 7 23 17 61 14 8 27 10 10 15 20 15 20 15 14 14 11 3/11/2010 13 12 12 11 9 10 30 13 7 6 4 ‐37 ‐30 2 10 12 61 77 ‐1 15 12 3/12/2010 7 6 5 14 6 9 11 14 24 ‐99 1 14 20 12 18 22 12 24 116 17 5 6 3/13/2010 32 3 8 3 3 6 4 6 10 10 26 57 89 151 99 102 116 148 99 535 234 129 43/14/2010 28 116 80 88 66 49 17 33 26 23 31 21 24 24 20 21 5 45 6 13 12 10 3/15/2010 10 3 5 6 6 4 7 13 7 7 11 13 16 ‐31 ‐28 14 30 73 35 1 7 4 3/16/2010 7 19 9 10 17 39 37 16 12 9 11 14 8 9 12 9 11 13 12 32 7 7 3/17/2010 7 19 6 8 14 17 21 16 17 18 11 2 12 9 11 7 10 19 10 11 7 13 3/18/2010 8 7 6 10 9 12 16 14 15 19 15 20 20 13 10 38 1255 1323 227 66 210 147 103/19/2010 429 150 181 355 160 92 59 71 49 47 43 28 17 15 19 34 23 38 24 24 24 26 43/20/2010 36 23 20 21 21 20 25 36 29 28 29 20 16 14 16 20 17 18 21 20 15 13 3/21/2010 15 14 14 14 15 15 20 17 19 23 23 20 20 18 16 18 34 6 29 38 29 28 3/22/2010 22 23 22 20 34 45 28 29 22 25 69 61 48 36 38 34 28 29 27 24 21 43/23/2010 339 715 232 105 159 152 102 38 33 94 43 25 33 33 32 20 16 19 15 32 3/24/2010 14 13 15 16 40 33 18 17 23 18 20 22 22 20 20 18 22 30 21 25 33/25/2010 40 43 50 41 42 46 35 26 41 19 23 16 13 19 16 41 138 108 155 58 14 21 3/26/2010 18 13 15 68 111 90 29 11 9 23 46 31 15 9 12 17 22 25 14 15 13 12 3/27/2010 60 49 221 164 120 101 71 26 33 21 12 4 4 5 7 7 11 20 9 11 9 8 3/28/2010 8 6 7 9 10 8 12 5 7 6 8 7 8 7 8 15 18 18 14 15 12 13 3/29/2010 13 13 12 13 17 58 56 19 16 15 18 18 36 27 21 28 13 8 15 10 11 11 3/30/2010 19 15 14 147 139 90 83 20 59 56 235 1170 499 96 79 53 45 18 10 17 12 9 3/31/2010 17 24 9 17 11 23 20 45 5 3 4 6 27 92 72 21 14 4 2 19 19 9 

Data capture: 99.2%

Hours in period: 744

Start Time End Time Maintenance Ind Audit Valid hours: 738

Maintenance/Invalidations

Inv Type

3/11/2010 11:15 3/11/2010 11:30 Bi‐weekly Flow Check 2.99 3.04 TEOM

3/22/2010 10:10 3/22/2010 10:35 Filter Change / Reset TEOM

3/23/2010 12:50 3/23/2010 13:01 Annual EPA Audit TEOM3/24/2010 10:00 3/24/2010 10:10 Bi‐weekly Flow Check 2.99 3.02 TEOM

Site Operator: Dan Johnson Key: Hourly: PM10 > 400 Hourly: PM10 = 

PRELIMINARY
End Hour: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Coso Junction TEOM: 696 Great Basin Unified A.P.C.D. Data for: Apr 2010

Hourly TEOM PM10 reading (μg/m3)

AVG HRS HI LOW

Run Time: 5/18/2010 7:33:56 AM

4/1/2010 16 9 8 9 31 22 16 6 5 7 29 33 36 61 39 13 14 12 15 11 11 19 21 61 5

4/2/2010 9 11 9 11 9 33 12 15 10 14 15 16 10 11 17 19 20 11 17 13 13 23 23 25 15 24 33 9

4/3/2010 22 18 20 24 23 21 28 28 27 26 30 33 37 40 90 81 74 48 38 37 32 26 23 26 35 24 90 18

4/4/2010 24 22 22 28 25 30 25 25 23 20 19 14 16 28 18 33 36 50 28 20 18 11 9 11 23 24 50 9

4/5/2010 9 3 6 5 4 6 6 8 7 7 11 12 7 8 10 7 10 6 3 8 7 7 5 6 7 24 12 3

4/6/2010 5 5 7 8 14 8 8 21 21 7 21 24 13 10 8 11 7 8 21 12 9 11 9 9 12 24 24 5

4/7/2010 7 7 7 8 22 9 11 10 22 6 6 12 9 44 77 67 115 186 13 9 8 11 7 29 23 186 6

4/8/2010 8 10 6 7 42 109 121 34 17 17 11 19 19 32 26 17 16 29 17 27 11 18 16 13 27 24 121 6

4/9/2010 9 9 11 12 16 15 15 74 123 122 107 70 54 40 18 29 30 35 43 38 21 17 16 15 39 24 123 9

4/10/2010 19 13 16 18 26 58 32 20 25 25 51 73 122 63 44 44 35 35 34 34 35 36 33 30 38 24 122 13

4/11/2010 28 30 29 29 32 48 44 32 29 28 27 25 25 33 28 28 27 20 19 19 14 15 8 3 26 24 48 3

4/12/2010 4 6 3 3 5 12 11 7 9 10 7 15 16 24 20 15 9 6 7 6 11 7 6 7 9 24 24 3

4/13/2010 10 9 7 10 32 34 40 15 33 12 10 33 20 163 24 21 21 41 19 9 10 11 9 7 25 24 163 7

4/14/2010 11 9 8 9 30 16 64 31 33 25 35 45 22 23 24 22 18 17 21 19 29 21 14 24 23 64 8

4/15/2010 14 11 13 16 15 152 41 24 17 10 16 26 19 18 22 26 24 45 41 27 71 43 26 21 31 24 152 10

4/16/2010 15 40 13 13 32 106 144 27 18 21 16 20 15 16 25 16 22 24 14 19 25 17 21 27 29 24 144 13

4/17/2010 34 23 14 15 13 17 17 17 13 27 13 18 14 11 19 23 34 22 25 27 22 24 19 18 20 24 34 11

4/18/2010 17 14 15 24 16 18 22 18 13 13 13 22 10 22 20 33 38 23 55 27 25 24 32 30 23 24 55 10

4/19/2010 25 27 27 35 41 37 33 42 34 35 50 36 40 39 31 30 26 28 42 19 24 23 28 22 32 24 50 19

4/20/2010 23 22 23 18 42 88 35 19 33 16 180 108 61 12 -4 14 7 2 5 2 3 4 1 5 30 24 180 -4

4/21/2010 26 2 2 1 -358 329 0 -3 1 5 10 8 3 6 5 1 9 4 10 9 7 6 9 13 4 24 329 -358

4/22/2010 5 8 3 19 17 32 11 7 10 13 9 0 11 11 10 4 14 8 15 10 8 6 5 10 23 32 0

4/23/2010 6 6 5 5 10 33 13 15 13 45 71 33 6 19 33 21 32 27 27 29 18 16 17 16 21 24 71 5

4/24/2010 13 8 9 8 9 12 15 6 10 10 7 18 14 13 14 13 17 15 22 30 17 16 16 14 13 24 30 6

4/25/2010 10 14 16 16 16 16 16 15 18 18 13 15 11 14 15 13 18 18 29 18 17 15 16 12 16 24 29 10

4/26/2010 16 17 17 20 23 18 18 19 18 16 20 23 28 23 19 24 30 32 30 14 18 19 20 15 21 24 32 14

4/27/2010 15 15 13 12 39 43 34 27 42 20 109 109 28 40 305 1394 108 68 28 12 9 118 21 1394 9

4/28/2010 8 16 21 11 -1 18 32 18 35 25 9 19 30 23 144 176 33 19 29 13 7 8 4 5 29 24 176 -1

4/29/2010 3 7 -1 2 6 15 11 46 56 24 20 18 7 13 28 21 7 11 40 15 18 16 18 17 23 56 -1

4/30/2010 19 17 14 12 9 13 13 16 22 50 28 35 30 23 18 12 10 11 9 10 14 25 66 35 21 24 66 9

Highest Hourly Value: 1394

Data capture: 98.6%

Hours in period: 720

Start Time End Time Maintenance Ind Audit Valid hours: 710

Maintenance/Invalidation

Inv Type

4/1/2010 10:45 4/1/2010 12:15 Filter Change / Reset TEOM

4/7/2010 9:01 4/7/2010 9:06 Bi-weekly Flow Check 2.99 3.04 TEOM

4/14/2010 11:40 4/14/2010 11:45 District Audit TEOM

4/22/2010 16:45 4/22/2010 16:50 Bi-weekly Flow Check 2.99 3.07 TEOM

4/27/2010 15:45 4/27/2010 17:50 Power Outage TEOM

4/29/2010 18:20 4/29/2010 18:35 Filter Change / Reset TEOM

Time Event

Site Events:

4/27/2010 16:00 Power outage during dust event.

Key: Avg Daily PM10 > 150; 

Max Daily > 800

Hourly: PM10 = 0 Invalid hour or 

no data

Avg Daily PM10 > 50 and < 150; 

Daily Max > 400 and < 800; Hourly PM10 > 400

Site Operator: Dan Johnson

PRELIMINARY
End Hour: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 

Coso Junction TEOM: 696 Great Basin Unified A.P.C.D. 

Hourly TEOM PM10 reading (μg/m3)

5/1/2010 13 16 9 6 6 8 9 8 8 10 7 5 5 8 14 9 11 20 17 15 14 13 5/2/2010 19 35 112 203 212 122 109 41 61 53 97 62 50 52 32 16 21 21 34 24 27 24 35/3/2010 23 16 13 16 35 40 43 24 21 24 28 26 25 25 38 26 20 20 14 23 21 16 5/4/2010 15 13 14 14 14 15 17 13 10 10 17 22 14 12 19 84 75 25 89 12 5/5/2010 16 11 14 13 13 11 11 5 3 ‐6 6 7 12 33 101 39 16 19 9 13 13 13 5/6/2010 8 14 14 48 85 117 154 186 81 79 77 60 55 47 45 44 42 40 41 49 41 5/7/2010 8 9 10 14 7 13 3 10 10 12 6 17 38 26 19 20 18 17 31 26 16 14 5/8/2010 12 13 15 17 16 18 19 16 18 12 7 2 16 4 5 22 21 23 21 26 4 35 5/9/2010 16 23 23 22 22 20 18 19 17 7 16 16 45 30 37 25 1075 3253 302 94 8 9 5/10/2010 12 12 9 12 14 15 10 4 6 14 23 20 25 38 77 101 122 138 41 21 6 32 5/11/2010 62 6 8 2 7 20 9 49 137 76 13 14 7 11 9 3 11 44 31 48 135 592 435/12/2010 14 26 33 31 23 20 14 13 7 5 8 8 6 19 12 10 11 17 34 14 15 5/13/2010 8 9 11 17 13 21 7 9 11 6 12 10 11 11 14 10 15 10 63 22 35 28 5/14/2010 16 8 15 13 15 22 10 11 13 8 6 8 9 14 11 18 34 8 39 29 26 16 5/15/2010 10 14 8 18 22 27 8 14 15 10 0 10 14 15 15 22 14 16 103 33 22 16 5/16/2010 16 15 18 17 22 29 23 13 16 7 21 17 49 13 12 24 35 31 31 22 28 32 5/17/2010 20 14 15 26 28 34 40 42 33 52 28 15 38 11 11 4 8 54 4 3 9 9 5/18/2010 4 3 11 11 14 15 15 5 ‐1 0 ‐2 11 16 10 13 14 13 7 45 32 19 10 5/19/2010 16 8 9 14 11 20 9 5 1 15 14 9 16 9 15 12 31 32 19 18 10 5 5/20/2010 2 1 23 7 15 22 17 7 9 9 42 49 29 31 21 25 37 25 27 17 5/21/2010 17 12 16 16 17 22 33 15 12 12 18 18 108 234 159 82 138 141 145 19 40 60 45/22/2010 16 14 11 10 9 12 9 9 4 5 5 4 5 4 9 10 17 8 9 9 23 57 65/23/2010 34 33 34 9 6 5 12 94 42 46 44 30 15 11 9 10 12 5 11 8 7 9 5/24/2010 7 6 6 7 7 17 7 6 6 9 15 15 22 9 16 9 11 12 27 15 19 14 5/25/2010 22 15 15 16 13 22 21 18 12 10 13 13 13 16 18 18 17 17 30 53 36 24 5/26/2010 13 8 7 8 7 9 12 9 11 9 8 10 7 11 9 11 15 22 26 28 17 15 5/27/2010 17 22 16 16 14 13 14 7 11 14 16 12 10 12 23 33 23 29 42 15 16 11 5/28/2010 9 8 7 8 2 11 11 10 10 6 7 6 6 7 6 7 6 5 13 163 108 131 435/29/2010 87 19 15 6 8 7 9 10 22 3 5 6 4 5 3 5 29 7 8 10 30 16 5/30/2010 10 11 11 10 11 12 11 11 10 11 6 6 7 8 10 18 21 16 26 34 56 27 5/31/2010 13 13 14 15 22 22 18 12 14 12 13 11 26 16 21 25 18 20 16 21 18 20 

Data capture: 99.2%

Hours in period: 744

Start Time End Time Maintenance Ind Audit Valid hours: 738

Maintenance/Invalidations

Inv Type

5/4/2010 10:05 5/4/2010 11:40 Filter Change / Reset TEOM

5/6/2010 17:35 5/6/2010 17:40 Filter Change / Reset TEOM

5/12/2010 15:50 5/12/2010 15:55 Filter Change / Reset TEOM5/20/2010 10:45 5/20/2010 11:05 Bi‐weekly Flow Check 2.99 3.03 TEOM

Time Event

Site Events:

5/1/2010 1:00 TEOM: Presumed Invalid Quarter (Q2 20

Federal exceedance on 5/9/2010 caused 

Owens Lake. ‐CBH

5/9/2010 18:00

Key: Avg Daily PM10 > 150;

Max Daily > 800

Avg Daily PM10 > 50 and < 150;

Daily Max > 400 and < 800; Hourly PM10 > 400

Site Operator: Dan Johnson

PRELIMINARY