depends on moisture and other elements
600 lbs = 12lbs / gallon not so good;
water = 8 lbs / gallon
Shipping usually brings some of the coolant to the top. We remove this excess top oil before sampling.
When your shipment arrives, core samples are taken and sent to an independent lab for analysis.
This is the proper way, as the heavier--and thus more valuable--material will have settled to the bottom. When the analysis comes back it might read something like:
If a drum of your sludge, before analysis, weighed 2,000 lbs, and if — as an example only — our offered price were $10.00/lb tungsten contained we would pay as follows:
Day 0: Phone for a price; written confirmation and terms emailed.
Day 1: FedEx truck scheduled for pickup at your convenience; bill of lading and other paperwork emailed or faxed to you.
2&3: FedEx picks up and delivers shipment.
Locations west of the Rockies, Canada or Mexico add a day or two.
We use FedEx Trade Networks to broker your shipment across the border.
Day 4: Contents weighed and inspected.
Excess oil and coolant removed & weighed
Core samples taken and sent to the lab for analysis
Day 25: Lab analysis back; check mailed
Day 28: You receive the check in the mail.