PAO Accredited Laboratories (as of Dec. 2012) - DTI

Products/
Class of Test
Specific tests or
Measurements
Page 52 of 391
Standard Method/
Reference Standard
Chemical Oxygen Demand Titrimetry (APHA-AWWA) Open
Reflux Method
Dissolved Oxygen Azide modification (APHA-
AWWA) Method 4500-O C; DO
probe method
Temperature Thermometry (APHA-AWWA)
Turbidity Nephelometric method (APHA-
AWWA)
Antimony Hydride- AAS (USEPA 7000)
Arsenic Hydride- AAS (USEPA 7000)
Colorimetry (AOAC)
Mercury Cold Vapor AAS
Selenium Hydride AAS (USEPA 200.1)
Aluminum, Barium, Beryllium,
Cadmium, Chromium, Cobalt,
Copper, Iron, Lead, Manganese,
Nickel, Silver, Thallium, Vanadium,
Zinc
Flame AAS (USEPA 7000)
Boron Colorimetry (APHA-AWWA)
Method 4500B C
Magnesium
Calcium
Titrimetry (APHA-AWWA)
2.34 Gases and aerosols
.04 Industrial Fumes and Ammonia Indophenol Method
Emissions Hydrogen Sulfide Cadmium Sulfide method (US
CFR Part 60)
Nitrogen Dioxide, stack air Phenoldisulfonic acid method
(US CFR Part 60)
Particulate Matter Gravimetry (US CFR Part 60
Appendix A)
Sulfur Dioxide, stack air Barium-Thorin Titrimetry (US
CFR Part 60)
Sulfuric Acid Mist Barium-Thorin Titrimetry (US
CFR Part 60)
Antimony, Arsenic, Barium, Beryllium, Method 29 (US CFR Part 50
Cadmium, Chromium, Cobalt,
Copper, Lead , manganese, Mercury,
Phosphorus as P2O5, Nickel,
Selenium, Thallium, Vanadium, Zinc
and Part 60) AAS
.05 Atmospheric Pollution Ammonia Indophenol method
.06 Air in Confined Spaces Hydrogen Sulfide Methylene blue method (US
CFR part 50 and 51)
Nitrogen Dioxide, ambient air Griess-Saltzman Colorimetry
(Methods of Air Sampling &
Analysis 3 rd Ed
Total Suspended Particulates (TSP) Gravimetry (US CFR 40 Part 50
and PM10
to 51) Appendix B
2.36 Constituents of the environment
Sulfur Dioxide, ambient air Pararosaniline colorimetry (US
CFR Part 50 Appendix A)
.01 Water other than saline
pH Meter (APHA-AWWA),
.02 Saline waters
Meter (USEPA 9045 CSWS46)
.08 Leachate procedures
Color Visual Comparison Method
.12 Sampling
2120B (APHA-AWWA)
Chloride Titrimetry (APHA-AWWA)
4500Cl-B
Chlorine, free and chloroamines Colorimetry (APHA-AWWA)
Method 4500 Cl-G
Chlorine, residual DPD / Orthotolidine (APHA-
AWWA); PSM / SMEWW
Total suspended solids Gravimetry (APHA-AWWA)
Total dissolved solids Gravimetry (APHA-AWWA)
Total solids Gravimetry (APHA-AWWA)
Settleable solids Imhoff Cone method (APHA-
AWWA)