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Environmental Technical Information Holding Times
     
     
       
     
 
 

 

I. AQUEOUS SAMPLES

 

 

 

Parameter

Holding Time

Total Coliform (drinking water)

30 hours

Total Coliform (water / wastewater)

6 hours

Fecal Coliform (drinking water)

30 hours

Fecal Coliform (water / wastewater)

6 hours

Fecal Streptococci

6 hours

Acidity

14 days

Alkalinity

14 days

Base Neutral / Acid Extractables

7 days [2]

Biochemical Oxygen Demand (BOD 5 )

48 hours

Soluble BOD 5

48 hours

Carbonaceous BOD 5

48 hours

Carbonaceous BOD 20

48 hours

Chemical Oxygen Demand (COD)

28 days

Chloride

28 days

Color

48 hours

Cyanide, Total

14 days

Dissolved Oxygen (Azide Mod.)

4-8 hours

Fluoride (drinking water)

28 days

Fluoride (water / wastewater)

28 days

Haloacetic Acids

28 days

Hardness

6 months

Metals (total)

6 months

Metals (dissolved)

6 months

Mercury (drinking water)

28 days

Mercury (water / wastewater)

28 days

Minerals (total)

6 months

Minerals (dissolved)

6 months

Nitrogen:

 

Ammonia-N

28 days

Nitrite-N

48 hours

Nitrate + Nitrite-N (drinking water)

14 days

Nitrate + Nitrite-N (water / wastewater)

28 days

Total Kjeldahl-N

28 days

Oil and Grease

28 days

Odor

24 hours

Pesticides, Chlorinated

7 days [2]

Petroleum Hydrocarbons (EPA 418.1)

7 days

pH

15 minutes

Phenols, Total Recoverable

28 days

Phosphorus:

 

Hydrolyzable

7 days

Orthophosphate

48 hours

Total

28 days

 

II. NON-AQUEOUS SAMPLES

 

Parameter

Holding Time

Base Neutral/Acid Extractables

14 days

Chemical Oxygen Demand (COD)

28 days

Cyanides

14 days

Metals

6 months

Chromium, Hexavalent

24 hours

Petroleum Hydrocarbons

(EPA 418.1, modified)

28 days

pH

24 hours

Phenols, Total Recoverable

7 days

Phosphorus, Total

7 days

Pesticides / PCBs

14 days

Total Nitrogen Series

7 days

Total Organic Carbon

14 days

Volatile Organics

14 days

 

RCRA Characteristics

TCLP / SPLP Full

48 hours

14 days

Polychlorinated Biphenyls (PCBs)

7 days

Radiological

48 hours

Residues:

 

Filterable (Dissolved Solids)

7 days

Non-filterable (Suspended Solids)

7 days

Total (Total Solids)

7 days

Settleable Solids

48 hours

Specific Conductance

28 days

Sulfate

28 days

Sulfide (Hydrogen Sulfide)

7 days

Total Organic Carbon

28 days

Trihalomethanes (THMs)

14 days

Turbidity (drinking water)

48 hours

Turbidity (water / wastewater)

48 hours

Volatile Organics

14 days

Depending upon analyses and deliverables requested, QC's standard turnaround time (TAT) for reporting analytical results is approximately two weeks; many samples require less time for reporting, and reports are released upon completion of all analyses. Expedited reporting of results is available at a 10% daily surcharge.

The following table lists QC's surcharges for expedited TATs:

Turnaround Time *

Surcharge **

Turnaround Time *

Surcharge **

 

 

 

 

1 Day *

100%

6 days *

50%

2 Days *

90%

7 Days *

40%

3 Days *

80%

8 days *

30%

4 Days *

70%

9 Days *

20%

5 Days *

60%

10 Days *

Standard

* Working Days

** Surcharge rates subject to change

 

 
QC Laboratories cannot assume responsibility for holding times that are exceeded due to delivery of samples past 4:30 PM or on weekends without prior arrangements for receipt.

Compound Lists
Holding Times
Methods
Sample Shipping