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Jul 31 02 07: 12p K Curtis Construction F �1-234-2411 p. 4 r %a/ fin/ r SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS t. The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative of native soils beneath the tank's inert(tank'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. r WATER NOT PRESENT IN THE TANK PIT TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES k (Gallons) of SOIL SAMPLES < 1,000 I per Tank Fill OR Pump End of Tank 1,000- 10,000 2 Er Tank 1 at each End of Tank r t > 10,000 3 or More Ends and Middle OR generally 1 Z+� per Tank spaced along the length of the Tank t. PIPING AND STOCKPILE aTA:N:K&�:P17P1NG PING SOIL SAMPLES 1 Sam le eve 20 lineal fy�a�rds et STOCKPILE SAMPLES 7 Samples every 50 cubic WATER IS PRESENT IN TANK PIT TANK [TANKSIZE MINIMUM NUMBER LOCATION of SOIL [MINIMUM NUMBERq allons) of SOIL SAMPLES SAMPLES WATER SAMPLES L < 10,000 2 from wall next to tank Single Tank 3 ends at soil/groundwater 1 `IIII interface& 1 below tank > 10,000 OR 4 from wall next to tank ends at soil/groundwater Tank Cluster 5 or more interface& 1 below each 1 I tank L SLAB PRESENT 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 obstruction will allow sampling according to the above conditions.) - TANK TANK SIZE MINIM=SAMPL=ES LOCATION of SOIL SAMPLES 4 M (Gallons) of SOI < 1.000 3 per Tank Center and Ends OR Sides of Tank 1.00()- 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 V along the length of the Tank EH 23 046(Revised 08/13/99) Page 7 a.. t.