Reference Library

Soilworks products are the industry’s top standard due to our insistence on creating high performance soil stabilization and dust control products that stand up to rigorous testing – both in the lab and in the field. Our commitment to quality and performance has led to our involvement and testing in hundreds of real-world situations. The following library of reports, presentations, specifications, approvals and other similar documents provide you, our customer, the transparency and dependable assurance that is expected from Soilworks.

Orange Coast College Interdisciplinary Complex (TPD1307134)





A.            Regulatory Requirements: Comply with applicable portions of codes and regulations of governmental agencies having jurisdiction, including applicable portions of CBC Chapter 33. Where those requirements conflict with the Contract Drawings, comply with the more stringent provisions.

1.            Soils Report: Comply with recommendations of the Geotechnical Investigation report referenced. Grading, backfill, and compaction provisions stated in this Section are minimum recommendations.

2.            Geotechnical Engineer: The Owner will retain the Project Geotechnical Engineer who will have the responsibilities of observing the performance of the work of this Section, making supplementary recommendations, and approving or rejecting import materials pro-posed for use.

a.            Conform to the recommendations of the Geotechnical Engineer.

3.            Work not covered by governing agency standards shall conform to Contract Drawings and Project Manual, in that order.

4.            Comply with appropriate provisions of the Storm Water Pollution Prevention Plan regarding cleaning and protection.


A.            LEED Goals: For information on LEED goal requirements, refer to Section 018113. Contractor shall provide a narrative for the following LEED goals:

1.            MR Credit 2.1 and MR Credit 2.2: Facilitate the reduction of waste generated by building occupants that is hauled to and disposed of in landfills.

a.            The actual dollar cost of the amount of this product used on the project must be tracked. The actual dollar cost shall be separated into the amount that meets the requirements of Section 018119 and amount that does not meet the requirements (for the amount of product allowed for use as a substitution as de-scribed above and in Section 018119).

2.            MR Credit 4.1 and MR Credit 4.2: Use materials with recycled con-tent that the sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes 20 percent of the total value of the materials in the project.

3.            MR Credit 5.1 and MR Credit 5.2: Use building materials or products that have been extracted, harvested or recovered, as well as manufactured, within 500 miles of the project site for 20 percent of the total materials value.



A.            Performance Requirements: Classification of soils when made in connection with the work of this Contract shall be in accordance with the applicable requirements of ASTM D 2487 and ASTM D 2488.



A.            General: Provide borrow soil materials when sufficient satisfactory soil materials are not available from excavations.

B.            Structural Fill: Provide native soils approved for backfill by the Geotechnical Engineer, or when required, or when required, granular, non-expansive import fill material approved for soil-fills, soil-rock fills, or rock fills by the Geotechnical Engineer.

1.            Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand conforming to ASTM D 2940, with at least 90 percent passing a 1-1/2-inch sieve and not more than 12 percent passing a No. 200 sieve.

2.            Fill material should not contain more than 30% gravel and rock sized particles (material larger than 3/4-inch).

*a. If more than 30% rock is used, the fill material is classified as a rock fill and is subject to special handling and placement criteria.

b. Soils that have an expansion index greater than 20 should not be used within the upper 4 feet of finish building pad or within the upper 2 feet of finish hardscaping subgrade.

C.            Backfill Material: Provide native soils approved for backfill by the Geotechnical Engineer, or when required, granular, non-expansive import backfill material, having the following characteristics:

1.            Liquid Limit: Not greater than 30, as determined in accordance with ASTM D 4318.

2.            Plasticity Index: Not greater than 12, as determined in accordance with ASTM D 4318.

3.            Expansion Index: Not greater than 20, as determined in accordance with UBC Standard 18-2.

4.            Gradation: Fill material shall not contain rocks or lumps over 6 inches in any dimension and not more than 15 percent larger than 2-1/2 inches. Comply with the following:

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D.           Subslab Base (Sand):

1.            Provide clean, free-draining sand having a Sand Equivalent of not less than 30, as determined in accordance with ASTM D 2419.

2.            ASTM C 33 having a Sand Equivalent of not less than 30 as deter-mined in accordance with ASTM D 2419.

E.            Subslab Base (Aggregate):

1.            Provide clean, free-draining aggregate, having a gradation equal to the following:

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F.            Utility Trench Pipe Bedding: Clean, free-draining sand, gravel, crushed aggregate, or native materials having a Sand Equivalent of not less than 30, as determined in accordance with ASTM D 2419.

G.           Porous Fill: 3/8 inch to 1/2-inch washed, uncrushed pea gravel.

H.           Water: Clean and free from deleterious amounts of acids, alkalis, salts, and organic matter.

I.             Geotextile Tensile Fabric: Mirafi 600X, or equal.

J.             Filter Fabric: Mirafi 140N, or equal.

K.            Vapor Retarder: Refer to Section 033100.

L.            Shoring Materials: Provide materials for shoring and bracing in good and serviceable condition.

M.           Synthetic Soil Binder: Durasoil® synthetic organic dust control agent, as manufactured by Soilworks®, LLC, or other standard manufacturer’s spray on adhesives designed for dust suppression.

1.            Product shall be non-toxic, non dissapating, non-curing, colorless, and odorless.

2.            Product shall be capable of being applied in any weather conditions.

N.           Rock Blanket: Clean, smooth Carol Canyon cobble, obtained from KRC Rock, or equal single source, of color and type as indicated on Contract Drawings. Rock shall have an average size of 8 inches to12 inches, none smaller than 6 inches.



A.            Import fill material shall be tested by laboratory and approved by Geo-technical Engineer prior to importing.

1.            Notify Geotechnical Engineer of location of material proposed for use at least 72 hours in advance of import operations.

B.            Contractor shall comply with the sampling requirements in the guidelines and will be required to pay for removal and disposal costs of any soil brought on site determined not to conform to Department of Toxic Sub-stance Control (DTSC) requirements and standards for school sites. Refer to the document Clean Imported Fill Material dated October 2001 issued by DTSC.



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