CITY PROJECT - 1821 & 1823 E Chestnut Ave - Plan

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ASSOCIATED SOILS ENGINEERING, INC. Project No.: 7160.23 2860 Walnut Avenue, Signal Hill CA 90755 January 23, 2024 Tel: (562) 426 -7990 * Fax: (562) 426 -1842 Page 16 lateral distance from the existing structure or public right-of-ways equivalent to one (1) times the excavation depth. While the maximum width and sequence of slot-cuts should be evaluated in the field during grading operations based on conditions exposed during initial site grading adjacent to the existing structure, for preliminary planning purpose, the width per slot should not exceed six (6) feet. Increase of length per cut slot is possible upon inspection and evaluation of actual exposed slot cut condition by the Geotechnical Consultant during site grading. Care shall be exercised such that no soil is removed from underneath any existing shallow foundation. 5.2.5 Suitable Soils and Imported Soils: Any fill used for the completion of subgrade preparation for the building pad areas of the Building should consist of predominantly “Very Low” to “Low” expansive material exhibiting an EI not greater than 35, and should be exhibiting a relatively uniform gradation, free of debris, particles greater than 4 inches in maximum dimension, organic matter or other deleterious materials. Unless otherwise approved by the Geotechnical Consultant, the imported or blended fill materials should also comply with the following soil corrosivity criteria: Corrosivity Criteria for Select Fill and General Fill Soluble Sulfate (% by weight) (1) Soluble Chloride (ppm) (2) Resistivity Value (ohm-cm) (3) pH-Value (4) ≤ 0.1 ≤500 ≥ 2000 7.0 ~ 8.8 (1) California Test Method 417. (2) California Test Method 422. (3) ASTM G187-23 Test Method. (4) California Test Method 532. Imported fill soils or base materials should be examined by a representative of the Geotechnical Consultant and tested as necessary for evaluating their suitability for use as fill prior to being hauled to the Site. Final acceptance of any imported soil will be based upon review and testing of the soil actually delivered to the Site. All blended material to be used as fill must be tested and approved by the Geotechnical Consultant prior to being used for fill placement. 5.2.6 Backfilling and Compaction Requirements: Existing site soils at their present state and composition, unless indicated otherwise, are considered suitable for re-use as fill during site grading, provided they 1) free of debris, particles greater than 4 inches in maximum dimension, organic matter or other deleterious materials, 2) are not environmentally contaminated, and 3) adequately moisture conditioned to permit achieving the required compaction. No nesting of large particles (2 to 4-inch size) should be permitted during backfilling operations.