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S A N J O A Q U I N Environmental Health Department <br /> COUNTY <br /> 4. After triple rinsing, inert UST with 30 pounds of dry ice per 1,000 gallon volume. <br /> 5. The owner or operator shall demonstrate to the satisfaction of the EHD that an unauthorized <br /> release has not occurred. This demonstration shall be based on soil sample analysis (and/or <br /> water analysis if water is present in the excavation). <br /> a. Sample analysis shall be performed during or immediately after closure activities. <br /> b. See `Sampling Protocols for Underground Storage Tank Removals'and `Minimum <br /> Verification Analyses For Underground Storage Tank Investigations'in the approved <br /> permit packet for required analytical tests and number of samples to be taken and <br /> witnessed by EHD. <br /> c. Soils shall be analyzed in accordance with CCR Title 23 section 2649 for all <br /> constituents of the previously stored hazardous substances and their breakdown or <br /> transformation products. If the checked analytes in the approved packet do not <br /> represent all constituents, additional analyses may be required. <br /> 6. The contractor shall provide the following: <br /> a. Combustible/Flammable gas detector (to verify the lower explosive limit (LEL) <br /> atmosphere and oxygen level of tank prior to lifting from excavation) <br /> b. Adequate number(s) and appropriate type(s) of fire extinguisher(s) <br /> c. Barriers to secure the area as necessary to minimize traffic and pedestrian interference <br /> d. Fluorescent spray paint to affix tank identification numbers <br /> 7. A copy of the following documents shall be available on site during all tank removal activities: <br /> a. The approved project Health and Safety Plan <br /> b. A copy of the fire permit for the closure in place <br /> c. A copy of this approval letter and the EHD permit approval packet <br /> 8. If the removed backfill material and soil is found to be contaminated it must be disposed of at <br /> an approved disposal location. A complete hazardous waste determination must be made in <br /> accordance with CCR Title 22 regulations prior to disposal. Treatment of soil on site can only <br /> be performed under a hazardous waste treatment permit. <br /> 9. The detection of any reportable unauthorized release shall require compliance with CCR Title <br /> 23 Article 5 release report and initial abatement requirements and Article 11 corrective action <br /> requirements. <br /> 10. The following information must be submitted within 30 days after the UST removal date: <br /> a. Analytical results: Only results that are sent directly to EHD from a third-party California <br /> accredited environmental laboratory with affixed chain of custody will be accepted <br /> b. Hazardous Waste Tank Closure Certification form (DTSC Form 1249) <br /> c. UST Disposition Tracking Record <br /> d. Hazardous waste manifest(s) for all hazardous wastes generated, including tank(s), <br /> piping, rinsate and residual product <br /> 11. The owner or operator shall maintain the analytical results of all soil and groundwater samples <br /> for at least 36 months after the UST system is properly closed. <br /> 2 of 3 <br />