Please call us in advance of BOD sampling to co-ordinate a schedule for sampling and delivery.

The Maine Department of Environmental Protection's maximum holding time for BOD5 and CBOD5 analysis is 24-hours from completion of grab sampling or 24-hours from completion of composite sampling to incubation of samples.  Data from samples analyzed outside the 24-hour holding time must be “flagged” when reported.


DAY OF WEEK: BOD and CBOD analyses require a 5-day incubation period.  To avoid having the fifth day fall on a weekend, samples must be taken from Tuesday afternoons through Friday.  If Monday sampling is unavoidable, please contact us in advance for possible options.

TIME OF DAY: Samples taken before 8:00 AM must be delivered to the laboratory as early as possible on the same day.  Please call us in advance if it is necessary to sample early in the day.


Clients shipping samples to the lab should sample as late in the day as possible for afternoon shipping.  Then ship "Overnight for Morning Delivery" to the laboratory.  UPS or FEDEX Next Day Air arrives 10:00 - 11:00 am.


You may want to discuss the following with your Maine DEP compliance officer:  CFR40 Part 136 Table II states, “Samples may be held for longer (holding time) periods only if the permittee, or monitoring laboratory, has data on file that for the specific types of samples under study, the analyses are stable for the longer time and has received a variance from the Regional Administrator…” 

2023 BOD Calendar

(pdf, 1 pg.)

BOD wrangler Dan Connolly