Sample Hold Times

(Click Hold Times to download PDF list)

Alkalinity……………………………..14 Days

Ammonia-N…………………………28 Days

BOD …………………………………48 Hours

Chloride……………………………..28 Days

COD…………………………………..28 Days

Coliform Bacteria, Total ………..24 Hours

Color………………………………….48 Hours

Conductivity…………………………28 Days

Cyanide, Free……………………..14 Days

Fecal Coliform/E. Coli MF……….8 Hours

Fluoride………………………………28 Days

Hardness…………………………….28 Days

Metals…………………………………28 Days

Metals (Dissolved)………………..48 Hours

Nitrate-N……………………………..48 Hours

Nitrite-N………………………………48 Hours

Oil & Grease (preserved)………28 Days

Oil & Grease (unpreserved)……4 Hours

Ortho Phosphate-P……………….48 Hours

pH………………………………………15 Minutes

Phosphorus, Total ………………..28 Days

Settleable Solids……………………7 Days

Sulfate…………………………………28 Days

TDS…………………………………….7 Days

TKN…………………………………….28 Days

TSS ……………………………………7 Days

Turbidity ……………………………..48 Hours

TVS…………………………………….7 Days

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