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4.i <br />Ms. Margaret Lagorio <br />Page 2 of 2 <br />proper disposal. The excavated soil will be stockpiled on an impermeable paved surface and <br />covered with plastic. The estimated area of excavation is depicted on Figure 3. Excavation will be <br />conducted by OSHA -certified personnel of Elite IV Contractors under the technical supervision of <br />Ground Zero. <br />Collect soil samples from the backhoe bucket or with a drive sampling device at the limits of the <br />excavation including at least four sidewall samples and one sample from the floor of the excavation. <br />Soil samples will be field -screened for the presence of VOCs using a photoionization detector <br />(PID). Should field evidence (odors, discoloration, PID readings) indicate the presence of <br />significant concentrations of VOCs, additional samples may be collected. <br />• Submit the samples to a state -certified hazardous waste testing laboratory for analysis of TPHg by <br />EPA Method 8015K BTEX by EPA Method 8020 and oxygenates by EPA Method 8260. <br />• Collect a composite sample from the stockpiled soil in order to characterize the soil for disposal. <br />Submit these samples to a state -certified laboratory for analysis of TPHg, BTEX and oxygenates. <br />Prepare a technical report summarizing the findings of the investigation for submittal to EHD. The <br />report will include an evaluation of the magnitude of contamination, discuss disposal of the <br />stockpiled soil, and will propose appropriate steps to further define or remediate the contamination <br />as appropriate. <br />All work will be conducted in accordance with Ground Zeros Quality Assurance/Quality Control Plan <br />(Attachment B) and our Site Specific Health and Safety Plan (Attachment C). <br />If you have any questions or comments please contact Ground Zero at your earliest convenience. <br />Respectfully, x <br />Ground Zero Analysis I C.G£O�O <br />GREGORY P. <br />Gregory P. Stahl, RG 5023 STAFIL <br />CA Certified Hydrogeologist No. 264 No. 5023 <br />Attachments OF CAO NN" <br />cc: Dr. Allen Wall, WLM <br />Mr. Chuck Dowdy, Elite IV Contractors <br />Mr. Dennis Catanyag, San Joaquin Co. EHD <br />