Our Certifications
We are accredited under NELAP by the Texas Commission on Environmental Quality.
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EPA Method Number
Texas Method Number
Method EPA SM 9221 C / 9221 E
State of Texas Method ID: 20037403
Fecal coliforms (enumeration) (2530)
Method EPA SM 2540 G
State of Texas Method ID: 20005203
Residue-total (total solids) (1950)
Method EPA SM 9223 B
State of Texas Method ID: 20211205
Escherichia coli (enumeration) (2525)
Method EPA SN 5220 D
State of Texas Method ID: 20027809
Chemical oxygen demand (COD) (1565)
Method EPA SM 4500-H+ B
State of Texas Method ID: 20104603
pH (1900)
Method EPA SM 4500-CN E
State of Texas Method ID: 20021209
Total cyanide (1645)
Method EPA SM 4500-CN C
State of Texas Method ID: 20020808
Total cyanide (1645)
Method EPA IDEXX Laboratories Colilert
State of Texas Method ID: 60002600
Escherichia coli (enumeration) (2525)
Method EPA EPA 300.0
State of Texas Method ID: 10053200
Bromide (1540), Chloride (1575), Chlorite (1595), Flouride (1730), Nitrate -nitrite (1820), Nitrate as N (1810), Nitrite as N (1840), Orthophosphate as P (1870), Sulfate (2000)
Method EPA SM 2510 B
State of Texas Method ID: 20048004
Conductivity (1610)
Method EPA SM 2540 C
State of Texas Method ID: 20049803
Residue-filterable (1955)
Method EPA SM 2540 D
State of Texas Method ID: 20004802
Residue-nonfilterable (TSS) (1960)
Method EPA SM 9223-IDEXX Laboratories Colilert Quanti-Tray Test
State of Texas Method ID: 20211603
Escherichia coli (enumeration) (2525), Total coliforms (enumeration) (2500)
Method EPA EPA 150.1
State of Texas Method ID: 10008409
pH (1900)
Method EPA EPA 1664
State of Texas Method ID: 10127807
n-Hexane Extractable Material (HEM) (O&G) (1803)
Method EPA EPA 180.1
State of Texas Method ID: 10127807
Turbidity (2055)
Method EPA HACH 8000
State of Texas Method ID: 60003001
Chemical oxygen demand (COD)
Method EPA EPA 335.4
State of Texas Method ID: 10061402
Total cyanide (1645)
Method EPA IDEXX
Method EPA SM 9223-IDEXX Laboratories Colilert Test
State of Texas Method ID: 20212413
Total coliforms and E. coli (P/A) (2502)
Method EPA SM 2310 B (4A)
State of Texas Method ID: 20002806
Acidity, as CaCO3 (1500)
Method EPA SM 2320 B
State of Texas Method ID: 20045005
Alkalinity as CaCO3 (1505)
Method EPA SM 2540 B
State of Texas Method ID: 20004608
Residue-total (total solids) (1950)
Method EPA SM 2540 F
State of Texas Method ID: 20005009
Residue-settleable (1965)
Method EPA SM 3500-CR B
State of Texas Method ID: 20065809
Chromium (VI) (1045)
Method EPA SM 4500-CI G
State of Texas Method ID: 20020604
Total residual chlorine (1940)
Method EPA SM 4500-NH3 D
State of Texas Method ID: 20108809
Ammonia as N (1515), Kjeldahl Nitrogen (Total Kjeldahl Nitrogen-TKN) (1790)
Method EPA SM 4500-O G
State of Texas Method ID: 20025405
Oxygen dissolved (1880)
Method EPA SM 4500-S2 D
State of Texas Method ID: 20125400
Sulfide (2005)
Method EPA SM 5210 B
State of Texas Method ID: 20027401
Biochemical oxygen demand (BOD) (1530), Carbonaceous BOD, CBOD (1555)
Method EPA SM 9222 D
State of Texas Method ID: 20037405
Fecal coliforms (enumeration) (2530)
Method EPA SM 4500-P E
State of Texas Method ID: 20025803
Phosphorus (1910)
Method EPA EPA 9095
State of Texas Method ID: 10204009
Paint Filter Liquids Test (10312)
