Table 2

TABLE 2
REQUIRED CONTAINERS, PRESERVATION TECHNIQUES, AND HOLDING TIME FOR SOIL OR SEDIMENT SAMPLES
PARAMETER SAMPLE CONTAINER1 SAMPLE PRESERVATION2,3 RECOMMENDED HOLDING TIMES4
Cyanide 500-mL P Cool, 4°C 14 days
Sulfide 500-mL P Cool, 4°C 7 days
Oil & grease, Total petroleum hydrocarbons 500-mL G Cool, 4°C 28 days
Nutrients/TOC 500-mL P Cool, 4°C 28 days
Metals (except Mercury) 500-mL P None required 6 months
Semivolatile organics,
pesticides, etc.
500-ml G with Teflonlined Lid Dark, Cool, 4°C Extraction – 14 days
Analysis- within 40 days of extraction
Volatile organics 125-ml amber  with Teflonlined lid Dark, Cool, 4°C 14 days
Mercury 500-mL P Cool, 4°C 28 days

Environmental Images

A typical closed landfill requires continuous maintenance. Here the area in the foreground has been reseeded and mulched to maintain an adequate vegetative cover.A typical closed landfill requires continuous maintenance. Here the area in the foreground has been reseeded and mulched to maintain an adequate vegetative cover.
A typical closed landfill requires continuous maintenance. Here the area in the foreground has been reseeded and mulched to maintain an adequate vegetative cover.