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E. Use of Stock �I: ed Soil as Backfill Materiaf <br /> Any stockpiled soil that we plan to use as backfill material will <br /> be sampled and analyzed as follows: discrete samples of the <br /> stockpiled soil will be collected at the rate of one sample for <br /> every 25 cubic yards and analyzed for TPA-Diesel and BTEX. Only <br /> soil which contains no detectable concentrations of BTEX and less <br /> than 100 ppm of TPH-Diesel will be used in backfilling the <br /> excavated area. <br /> es <br /> F. Backfilling Procedures <br /> w The excavated area will be backfilled in accordance with the <br /> procedures described in the San Joaquin County Development <br /> Department' s guidelines for backfilling. We will obtain a <br /> backfill certificate from this department to verify that the <br /> proper procedures were followed. <br /> G. Review of Analytical Results <br /> The analytical results from the sidewall and bottom samples <br /> collected after overexcavation will be submitted to the SJCEH <br /> Department, attention Mary Meays, for review and approval. We <br /> will not backfill the excavated area prior to receiving <br /> authorization to do so. <br /> H. Sampling Protocol - Composites <br /> v <br /> No composite samples of soil or groundwater will be collected or <br /> submitted for analysis during this project. Discrete samples of <br /> groundwater removed from the excavation will be collected at <br /> location(s) in the storage tank as specified by representatives <br /> from the Stockton wastewater treatment plant. <br /> v <br /> I. Disposal Documentation <br /> All disposal documentation will be submitted to the SJCEH <br /> Department in a report summarizing the work performed during this <br /> project. The report will be prepared under the direction of and <br /> signed by a Registered Geologist. A copy of this report will <br /> also be forwarded to Elizabeth Thayer of the Regional Water <br /> Quality Control Board. <br />