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SAN JOAQUIN COUNTY PUBLIC HEALTH SERVICES SAMPLING PROTOCAL FOR ROUTINE TANK REMOVALS The following repre@ents minimum sampling criterion required for oloaure compliance. Soil samples collected @hall be representative of native soils beneath tha tank'" invert (tank`s bottoml at a collection depth not to exceed 2 - 4 feet If contamLnatiois is documented during closure, an Unauthorized Release Notification must be completed dud submitted within S working days. California Health & Safety code-Sec 25295. WATER NOT PRESENT IN THE TANK PIT TANK SIZE MINIMUM NUMBER Qf LOCATION of SOIL. SAMPLE SOIL. SAMPLES � * ;.1144 T 4#000 NAIWHII,_t 110Cwt4flk pill or pump Nod of tank 1,000 - 10,000 GALLONS TWO par tank One at each and of tank 10,001 GALLONS and UP THREE or MORE Ends and Middle or per tank generally spaced along the length of the tank PIPING ONE per EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT TANK SIZE MINIMUM NO. of LOCATION of SOIL MINIMUM NUMBER SOIL SAMPLES SAMPLES of WAEWR shmVLbs 10,000 GALLONS From wall next to or LESS tank ends at soil/ (Single Tank) Two groundwater ONE interface GREATER THAN From wall next to 10,000 GALLONS FOUR tank ends at soil/ or groundwater ONE TANK CLUSTER interface SLAB PRESENT IN 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 sample". (Physical removal of the Obstruction will allow sampling according to the above conditions. ) TANK SIZE MINIMUM NUMBER of LOCATION Of SOIL SAMPLES SOIL SAMPLES LESS THAN 1,000 GALLONS THREE per tank center and ends or aides 14000 - 10,000 GALLONS FIVE per tank Center and ends or aide@ 10,000 GALLONS and UP FIVE or MORE per Enda and Middle and tank generally spaced along the length of the tank Eli 23 047 (Rev 2/8/91) ft Page 7