Lake Tahoe Atmospheric Deposition Study (LTADS)

This page updated March 6, 2007.

LTADS Monitoring Sites

Monitoring Network

LTADS enhanced monitoring efforts within the Tahoe Basin to provide air quality and meteorological data with comprehensive temporal and spatial coverage. The particulate matter data collected with the Two-Week-Samplers and the Mini-Volume-Samplers were also analyzed for composition (e.g., ions such as ammonium, nitrate, and phosphate; organic carbon, elemental carbon; metals, including phosphorus). Thus, LTADS generated a very extensive database suitable for additional analytical efforts. The general location of all the monitoring sites during LTADS can be seen on this map of the monitoring network.

 

Click on the image above or this link for a larger image.

The parameters monitored at each site are listed in the table below. The Site ID# relates back to the location map above. Clicking your mouse on the Site Name will provide a more detailed map of the site location. Clicking your mouse on an "x" in the Pic column will open up a photo providing additional insight into the local environment of that monitoring site. In addition, links in the Footnote/Legend section of the Table will provide photos of the monitoring equipment.

Site

Gasses

Particles

ID

Name

Pic

CO

O3

NOx

NOy

NO2

HNO3

NH3

2.5

10

TSP

Met

Dep

1

Big Hill

X

X

X

 

X

eL

DL

D

TB

T

T

SA

 

2

Echo Summit

X

X

X

X

 

e

         

S

 

3

SLT - Airport

X

                   

SA

 

4

Sandy Way

X

X

X

X

X

e

D

D

TBF

TBF

TB

S

 

5

SOLA

X

         

D

D

   

TB

S

 

6

Bliss

X

                 

M

S

 

7

Ward Creek (Upper)

                       

X

7

Ward Creek (Wallis Res.)

X

                 

M

 

X

8

Tahoe City

X

                   

SA

 

9

Lake Forest (TRG)

X

X

X

 

X

e

D

D

TB

TB

TB

   

10

Incline Village

   

X

                   

11

Incline Vlg GID

X

                   

SA

 

12

Thunderbird Lodge

X

         

D

D

TBI

TBI

TB

S

 

13

Cave Rock

X

 

X

             

B

S

 

14

Stateline (Harvey's)

 

X

                     

16

Grass Valley

                     

SA

 
 

Buoys

                         

15

TB1 (NE)

X

                 

M

S

X

15

TB4 (NW)

                   

M

S

X

15

TDR1 (SW)

                     

S

 

15

TDR2 (SSW)

                     

S

 
 

Piers

                         

15

Lake Forrest (USCG)

X

                 

M

S

 

15

Rubicaon Bay

                     

S

 

15

Sunnyside

                     

S

 

15

Tahoe Vista

                     

S

 

15

Timber Cove

X

                 

M

S

 

15

Wallis Pier

X

                 

M

   

15

Zepher Cove

X

                 

M

S

 
 

Aircraft / Boat

                         
 

Cessna (Aircraft)

   

X

 

X

 

D

D

C

   

A

 
 

LaConte (Boat)

   

X

 

X

     

C

   

S

 
Legend
  Parameters Measured:
    CO = carbon monoxide
    O3 = ozone
    NOx = oxides of nitrogen
    NOy = total reactive oxides of nitrogen
    NO2 = nitrogen dioxide
    HNO3 = nitric acid
    NH3 = ammonia
    2.5 = PM2.5 (particulate matter <2.5µ in diameter)
    10 = PM10 (particulate matter <10µ in diameter)
    TSP = total suspended particulate matter
    Met = meteorology (usually temperature, relative humidity, wind speed, wind direction)
    Dep = atmospheric deposition by surrogate surface methods (dry, wet, or bulk)
  Measurement Methods:
    e = estimated by difference method (NOy - NO or NOx - NO)
    A = aloft or above-ground (~10 meters) measurement with Radar Wind Profiler, Mini-SODAR or plane
    B = beta attenuation monitor (continuous (hourly) particulate matter mass measurement) (exterior / interior)
    C = particle counter (>0.4µ and >4µ)
    D = coated denuders method (analyzed by automated colorimetry)
    F = Federal Reference Method sampler (24-hour, every 6th day filter-based particle mass sample)
    I = IMPROVE filter-based sampler (PM2.5 mass and composition; PM10 mass)
    L = laser-induced fluorescence method (also measures alkyl- & peroxy-nitrates in addition to NO2 & HNO3)
    M = mini-volume sampler (filter-based particle mass; runs 24-hours on buoys but 1-2 weeks elsewhere)
    S = surface or near-ground (~10 meters) measurement
    T = Two-Week-Sampler (2-week filter-based particle mass and composition measurement; includes denuders)
 

For questions concerning the Lake Tahoe Atmospheric Deposition Study, please contact:

Mr. Leon Dolislager
Research Division
California Air Resources Board
P.O. Box 2815
Sacramento CA 95812
(916) 323-1533


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