The rear storage area of the fluid lab trailer demonstrates its accessible storage capabilities through the large double doors. The rear storage area utilizes containment for diesel fuel for powering the generator, water tanks for interior lab clean up, water pumps, accumulators and a spare tire. The rear storage area of the fluid lab trailer is completely coated for weather-proofing. The doors can remain open in adverse weather conditions without compromising the operations and lab equipment in the forward compartment.