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SA"WLING PROTOCOL FOR ROUTINE TANK REMOVALS The fallowing represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative of native sods beneath the ranles invert (taal's bottom) at a collection depth not to exceed 2 -4 feet. If contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within five (5) working days pursuant to California Health &Safety Code,Section 25295. WATER NOT PRESENT IN THE TANK PIT TANK TANK S= NMM UM NUMBER LOCATION OF SOIL SAMPLES II (Gallons) of SOIL SAWLES < 1,000 1 per TankFill OR Pump End of Tank I,CCO IO,CCO 2 per Tank 1 at each End of Tank �I > 10,000 3 or More Ends and Middle OR generally per Tank spaced along the length of the Tank II PIPING AND STOCKPILE EKPLDING SOIL SAbLDLES I Sample every 20 lineal feet I VII T.�-,K & PIPING 570C.K?= SA.MPLcS I 2 Samples every 50 cubic yards WATER IS PRESENT iN TANK PIT TANK TAY-,<SiZ MLNLtifUM NUM9ER LOC?.TION of SOIL ML`M 9-TM NUM3ER Of (Gallons) I of SOLI SAbkPL�S I SAMPLES I WAicR SA,NCOL=S j < 10,000 Fromwall nett to tank Single Tank I 2 I ends at soil/groundwater I 1 ince;ace > 10,000 ORFrom wall nen cc Link Tank CIuster I 4 I ends at soil! I 1 groundwater interface SLAB PRESDT IN THE TANK PIT Soil samples shall be Obtained beneath the slab within native soils. Penetration through the obstruction will be required in order to collect the samples. (Physical removal of the obstrucioa will allow sampling according to the above condiions.) TANK TANK SIZE M�f NUMBERI LOCATION of SOIL SANTLES —I (Gallons) of SOIL SA��iPLES < 1,000 3 per Tank Center and Ends OR Sides of Tank 1,CC0 - 10,000 5 per Tank Center and Ends OR Sides Of Tank > 10,000 5 OR More per Tank Ends and Middle and generally spaced along the length of the Tank E:-I 23 047 (Revised 7/10/92) Page 7