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