Appendix Table 1-3 

1

Appendix Table 1-3. Methods, reporting levels, and laboratories used for chemical analysis for the Deepwater Horizon oil spill, Gulf of Mexico, 2010: trace and major elements and nutrients in water.—Continued[Method codes are from the National Water Information System (NWIS) database, and are defined in Table 1-6. Abbreviations: a, no reporting level because analyte was detected in all samples; calc, calculated; CASRN, Chemical Abstracts Services Registry Number; N, nitrogen; na, not applicable; NH4, ammonia; NWQL, National Water-Quality Laboratory, Denver, Colorado; OCRL, Organic Carbon 

Research Laboratory, Boulder, Colorado; pcode, parameter code from the U.S. Geological Survey NWIS database; TAL-FL, TestAmerica Laboratory, Pensacola, Florida; USGS, U.S. Geological Survey; μg/L, microgram per liter; μS/cm, microSiemens per centimeter at 25 degrees Celsius; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mg/L as NH4, milligram per liter as ammonia; ʺ, cell is 

identical to the cell immediately above]

Analyte CASRN Pcode Laboratory Method code Reporting level1 Units

Aluminum 7429-90-5 01105 USGS NWQL PLA15 50 μg/L

 ʺ ʺ ʺ ʺ PLM48 5.6 ʺ

Ammonia as N na 00610 TAL-FL CL016 0.02 mg/L as N

 ʺ ʺ ʺ USGS NWQL CL017 0.04 ʺ

Ammonia as NH4 na 71845 calc ALGOR 0.026–0.052 mg/L as NH4

Ammonia plus organic nitrogen as N na 00625 TAL-FL KJ001 0.12–0.16 mg/L as N

 ʺ ʺ ʺ USGS NWQL KJ008 0.05–0.1 ʺ

Antimony 7440-36-0 01097 TAL-FL PLA17 10.0–100 μg/LArsenic 7440-38-2 01002 TAL-FL PLA17 4.0–40.0 μg/L

 ʺ ʺ ʺ USGS NWQL PLM11 0.18 ʺ

Barium 7440-39-3 01007 TAL-FL PLA17 1.0–10.0 μg/L

 ʺ ʺ ʺ USGS NWQL PLA15 0.6 ʺ

Beryllium 7440-41-7 01012 USGS NWQL PLA15 0.38 μg/LBoron 7440-42-8 00999 TAL-FL PLA17 5.0–50 μg/LCadmium 7440-43-9 01027 TAL-FL PLA17 1.0–10.0 μg/L

 ʺ ʺ ʺ USGS NWQL PLM47 0.04 ʺ

Calcium 7440-70-2 00916 TAL-FL PLA17 0.03–0.3 mg/L

 ʺ ʺ ʺ USGS NWQL PLA15 0.04 ʺ

Chromium 7440-47-3 01034 TAL-FL PLA17 2.0–20 μg/L

 ʺ ʺ ʺ USGS NWQL PLM11 0.42 ʺ

Cobalt 7440-48-4 01037 TAL-FL PLA17 3.0–30.0 μg/L

 ʺ ʺ ʺ USGS NWQL PLM11 0.04 ʺ

Copper 7440-50-8 01042 TAL-FL PLA17 2.0–20 μg/L

 ʺ ʺ ʺ USGS NWQL PLA15 3.8 ʺ

Dissolved nitrogen na 00602 calc ALGOR 0.14 mg/L

 ʺ ʺ ʺ USGS OCRL PCL01 a ʺ

Iron 7439-89-6 01045 USGS NWQL PLA15 9.2 μg/LLead 7439-92-1 01051 TAL-FL PLA17 2.0–20 μg/L

 ʺ ʺ ʺ USGS NWQL PLM48 0.06 ʺ

Lithium 7439-93-2 01132 USGS NWQL PLA15 0.08 μg/L

Magnesium 7439-95-4 00927 USGS NWQL PLA15 0.0080 mg/L

Manganese 7439-96-5 01055 TAL-FL PLA17 1.0–10.0 μg/L

 ʺ ʺ ʺ USGS NWQL PLA15 0.5 ʺ

Mercury 7439-97-6 71900 TAL-FL CV021 0.07 μg/LMolybdenum 7439-98-7 01062 TAL-FL PLA17 2.0–20 μg/L

 ʺ ʺ ʺ USGS NWQL PLM48 0.1 ʺ

Appendix Table 1-3. Methods, reporting levels, and laboratories used for chemical analysis for the Deepwater Horizon oil spill, Gulf of Mexico, 2010: trace and major elements and nutrients in water.
2 Contaminants in Water and Sediment Sampled in Response to the Deepwater Horizon Oil Spill Appendix Table 1-3. Methods, reporting levels, and laboratories used for chemical analysis for the Deepwater Horizon oil spill, Gulf of Mexico, 2010: trace and major elements and nutrients in water.—Continued [Method codes are from the National Water Information System (NWIS) database, and are defined in Table 1-6. Abbreviations: a, no reporting level because analyte was detected in all samples; calc, calculated; CASRN, Chemical Abstracts Services Registry Number; N, nitrogen; na, not applicable; NH4, ammonia; NWQL, National Water-Quality Laboratory, Denver, Colorado; OCRL, Organic Carbon Research Laboratory, Boulder, Colorado; pcode, parameter code from the U.S. Geological Survey NWIS database; TAL-FL, TestAmerica Laboratory, Pensacola, Florida; USGS, U.S. Geological Survey; μg/L, microgram per liter; μS/cm, microSiemens per centimeter at 25 degrees Celsius; mg/L, milligram per liter; mg/L as N, milligram per liter as nitrogen; mg/L as NH4, milligram per liter as ammonia; ʺ, cell is identical to the cell immediately above] Analyte CASRN Pcode Laboratory Method code Reporting level1 Units Nickel 7440-02-0 01067 TAL-FL PLA17 3.0–75.0 μg/L ʺ ʺ ʺ USGS NWQL PLM11 0.36 ʺ Organic nitrogen na 00605 calc ALGOR 0.05–3.1 mg/L Phosphorus as P 7723-14-0 00665 TAL-FL CL159 0.032 mg/L ʺ ʺ ʺ USGS NWQL AKP01 0.02 ʺ ʺ ʺ ʺ ʺ CL021 0.0040 ʺ ʺ ʺ ʺ ʺ KJ009 0.04 ʺ Potassium 7440-09-7 00937 TAL-FL PLA17 0.1–20 mg/L ʺ ʺ ʺ USGS NWQL PLO01 0.08 ʺ Selenium 7782-49-2 01147 TAL-FL PLA17 4.0–40.0 μg/L ʺ ʺ ʺ USGS NWQL PLM11 0.1 ʺ Silver 7440-22-4 01077 TAL-FL PLA17 2.0–20 μg/L ʺ ʺ ʺ USGS NWQL PLM48 0.016 ʺ Sodium 7440-23-5 00929 USGS NWQL PLA15 0.24 mg/L Specific conductance na 90095 USGS NWQL WHT03 5.0 μS/cm Strontium 7440-24-6 01082 USGS NWQL PLA15 0.6 μg/L Thallium 7440-28-0 01059 TAL-FL PLA17 4.0–40.0 μg/L Vanadium 7440-62-2 00985 TAL-FL PLA17 2.0–20 μg/L Zinc 7440-66-6 01092 TAL-FL PLA17 8.0–80.0 μg/L ʺ ʺ ʺ USGS NWQL PLA15 4.0 ʺ

1Range in reporting levels for that analyte, analyzed by that method and laboratory. Reporting level is defined as the concentration set by a laboratory and used for reporting analytical results that are 

determined to be less than the detection level.