Table 4 - Calendar Days

Table 4 - Calendar Days

SAMPLING INTERVAL

ALLOWABLE RANGE

60 Days

54 - 66 Days

90 Days

81 - 99 Days

180 Days

162 - 198 Days

365 Days

329 - 401 Days

b. Occasionally, the laboratory will request samples be submitted more frequently in order to

maintain a component under closer surveillance. When a special sampling interval has been

instituted, it should be followed until the laboratory informs the operating unit to return the

component to the normal sampling interval.

c. The allowable range above should not interfere with sampling on a scheduled basis.

Scheduling should be established in accordance with the sampling intervals listed in appendices

A and B. This should normally reduce equipment downtime by permitting sampling of

components while performing other scheduled inspections or services. Scheduling will permit

the operator, crew, AOAP monitor, and other interested individuals to easily determine when the

next AOAP sampling is required.

d. If the equipment does not have a functioning hour meter use the formula, 10 miles or 16

kilometers = 1 hour of operation to calculate operating time. For example, a truck

should be sampled every 90 days or 100 hours, you should sample every 90 days or 1,000 miles

if there is no hour meter. (The sampling interval varies for different categories of equipment.)

6-5. Mailing and Delivery Instructions. When samples are to be mailed and the number is four

or less, use the shipping sack. Insert the oil sample bottle(s) into the plastic bag and seal. Place

the completed Oil Analysis Request forms into the shipping sack along with the plastic bag(s).

Send it by first-class mail to your supporting laboratory. Do not use bulk mail or parcel post.

When the number of samples is five or more, use the boxes from which the empty bottles came

in. Place the Oil Analysis Request forms in a plastic bag and lay it on top of the bottles. When

delivering a sample directly to the laboratory, fold the completed Oil Analysis Request form in

half, wrap it around the sample bottle and secure it with a rubber band.