Schedule 2750

Description: NAWQA, Major Inorganics, Filtered

Analyzing Laboratory(s):

USGS - National Water Quality Laboratory, Denver, CO

Analyte

CAS Number

RL

Unit

bromide

24959-67-9

0.02

mg/L

Calcium

7440-70-2

0.02

mg/L

Chloride

16887-00-6

0.2

mg/L

fluoride

16984-48-8

0.1

mg/L

Inductively coupled plasma (ICP) setup

unsp

Iron

7439-89-6

6

ug/L

Magnesium

7439-95-4

0.008

mg/L

Manganese

7439-96-5

0.6

ug/L

pH, laboratory

0.1

pH

Potassium

9/7/7440

0.16

mg/L

residue, 180 degrees Celsius

10

mg/L

Silica

7631-86-9

0.04

mg/L

Sodium

7440-23-5

0.2

mg/L

specific conductance, laboratory

2.6

uS/cm

Sulfate

14808-79-8

0.18

mg/L

Lab Code 69 may only be deleted when the field conductivity value is provided.

Container Requirements

Quantity

Bottle

1

250mL FA

Description: 250 mL Polyethylene bottle, acid-rinsed

Treatment and Preservation: , Filter through 0.45-um filter, use filtered sample to rinse containers and acidify sample with nitric acid (HNO3) to pH < 2

1

250mL FU

Description: 250 or 500 mL Polyethylene bottle,

Treatment and Preservation: Filter through 0.45-um filter. Use filtered sample to rinse containers

1

250mL RU

Description:

Treatment and Preservation: 250 or 500 mL Polyethylene bottle, Use unfiltered sample to rinse bottles

References

1. OFR 93-125

Fishman, M.J., ed., 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of inorganic and organic constituents in water and fluvial sediments: U.S. Geological Survey Open-File Report 93-125, 217 p.

Method ID: I-1472-87

2. TWRI B5-A1/89

Fishman, M.J., and Friedman, L.C., 1989, Methods for determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey Techniques of Water-Resources Investigations, book 5, chap. A1, 545 p.

Method ID: I-1750-89 , I-2057-85 , I-2129-89 , I-2327-89 , I-2587-89 , I-2781-89

3. Std Meth 20th Edition - 3120

American Public Health Association, 1998, Standard methods for the examination of water and wastewater (20th ed.); Washington, D.C., American Public Health Association, American Water Works Association, and Water Environment Federation, p.3-37 - 3-43.

Method ID: 3120-ICP

4. TWRI B5-A1/89

Fishman, M.J., and Friedman, L.C., 1989, Methods for determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey Techniques of Water-Resources Investigations, book 5, chap. A1, 545 p.

Method ID: I-1750-89 , I-2057-85 , I-2129-89 , I-2327-89 , I-2587-89 , I-2781-89