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f i 11 . Certificationfindemnifiction statement signed by the generator In addition to the generator, the document(s) which provides items 1 through 10 above must be signed by a professional geologist or engineer registered in California. The minimum analyses required for any soil considered for acceptance at the Facility are: 1. Total Petroleum Hydrocarbons (tPH) defining the gasoline, diesel and oil contents of the soil based on EPA Method 8015M 2. Benzene, toluene, ethylbenzene and xylene (BTEX) based on EPA Method 8020 3. 'Total Recoverable Petroleum Hydrocarbons per EPA Method 418. 1 If the historical uses of the contaminated site are not known or if the characterization of the site is not conclusive in the opinion of WSR personnel, some of the following additional laboratory results may be required: 1 . Aquatic bioassay per CCR 66696(a) (4) 2. Total Organic lead per DHS-LUFT Method 3. Total concentrations of cadmium, lead, chromium, zinc, and nickel per EPA Method 6010 4. Soluble metals for all metals whose total concentration exceeds 10 times the STLC value defined in CCR 66699(b) per the California Waste Extraction Test (WET) 5. Chlorinated hydrocarbons per EPA Method 8010 6. Oil and Grease per EPA Method' 5520 E&F 7. Poly-nuclear aromatics (PA' s) and/or poly-chlorinated biphenyls (PCB's) per EPA Method 8270 Within five (5) working days after receipt of all requested information, WSR will notify the generator regarding the acceptability of the soil . If the soil is acceptable, a letter authorizing shipment of the soil to the Facility will be issued to the generator. A copy of this letter must accompany each load of soil received at the Facility Procedures for Checking IndomIng Contaminated Soil Prior to off loading any contaminated soil at the Facility, incoming loads will be screened at the gate to further ensure the soil is non-hazardous, representative of the pre-accepted soil and is suitable for treatment by the thermal processing unit. If the number of loads from a given site is three or less, each load will be screened. If the number of loads from a given site is four or more, the first load, the last load and at least twenty (20) percent of the loads in between will be screened.