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SAMPLING PROTOCOL FOR ROUTINE PIPING/DISPENSER REMOVAL/REPLACEMENT <br />The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be <br />representative of native soils beneath the tank's invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. If <br />contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within <br />five (5) working days pursuant to California Health & Safety Code, Section 25295. <br />DISPENSER SAMPLES <br />AT LEAST ONE SAMPLE BELOW EACH DISPENSER <br />PIPING AND STOCKPILE <br />PIPING SOIL SAMPLES <br />1 Sample every 20 lineal feet <br />DISPENSER & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />