ON APRIL 2, 2008, A TRUCK TRACTOR PULLING THE TANDEM TRAILER LEFT TEH ROADWAY, STRUCK THE ROCK EMBANKMENTS AND OVERTURNED. APPROXIMATELY 6380 GALLONS OF GASOLINE WAS RELEASED FROM THE REAR TRAILER KNOWN AS A PUP TRAILER. THIS GASOLINE TRAVELED IN THE DITCH LINE A DISTANCE OF APPROXIMATELY 130 FEET TO THE SOUTH AND 75 FEET NORTH OF THE POINT WHERE THE TRAILER CAME REST. THE GASOLINE SEEPED INTO THE EARTH; NO FREE PRODUCT WAS ACCOMPLISHED. THE SPILL OCCURRED ON INDIAN COUNTRY ON LAND UNDER THE JURISDICTION OF THE CONFEDERATED SALISH AND KOOTENAI TRIBES ON THE FLATHEAD INDIAN RESERVATION.