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' A . The soil testing service must inspect and approve subgrades and fill layers <br /> before construction work is performed thereon . The OWNER will pay for <br /> ' soil testing services as specified in paragraph 1 . 4 . A . 1 . The CONTRACTOR <br /> shall order and schedule all tests . <br /> B . Density Tests Required for Areas That Will Receive Fill/Backfill and <br /> Compaction : These tests are required to be performed on earth that has <br /> been prepared to receive fill/backfill , prior to the fill/backfill being placed . <br /> Unless otherwise specified , take one ( 1 ) density test per every 10 , 000 <br /> square feet of surface area . The Modified Proctor Maximum Dry Density <br /> Test (ASTM D1557 ) shall be used for all density tests . <br /> ' C . Density Tests Required for Fill and Backfill Material : <br /> 1 . Each inherently different material to be used for compacted backfill , fill <br /> or embankment fill shall be tested for maximum dry density/optimum <br /> moisture content. The Modified Proctor Maximum Dry Density Test <br /> (ASTM D1557 ) shall be used for all density tests . <br /> 1 2 . A minimum of one test per 200 cubic yards of fill material shall be <br /> performed at the point of use . Tests shall be taken at locations <br /> designated by the ENGINEER or specified elsewhere . If any tests are <br /> unsatisfactory , the CONTRACTOR shall recompact the material , at his <br /> expense , until the required density is obtained . <br /> 3 . Footing Sub-grade : For each strata of soil on which footings will be <br /> placed , conduct at least one test to verify required design bearing <br /> capacities . Subsequent verification and approval of each footing <br /> subgrade may be based on a visual comparison of each subgrade with <br /> 1 related tested strata , when acceptable to ENGINEER . <br /> 4 . Paved Areas and Building Slab Subgrade : Make at least one field <br /> density test in each compacted layer of subgrade for every 2000 <br /> square feet of overlaying paved area or building slab , but in no case <br /> less than 3 tests per layer. <br /> 5 . Foundation Wall Backfill : Take at least 2 field density tests , at <br /> locations and elevations as directed . <br /> 6 . Density Test Locations for Pipelines : The compacted backfill/fill shall <br /> ' be tested for in - place density at the rate of one test location per 200 <br /> lineal feet (or fraction thereof) of trench , or as shown on the Drawings <br /> or as directed by the ENGINEER . The density tests shall be taken at <br /> each location in one-foot intervals beginning at the trench bottom and <br /> ending at the final grade . At road or pavement crossings , a minimum <br /> of two (2 ) density tests per crossing per lift is required . <br /> ' 7 . Density test locations for manholes and drainage structures : At least <br /> one test shall be taken at the center of the bottom of the excavation <br /> and subsequent tests shall be taken at one-foot intervals on at least <br /> ' Last revised 9/ 10/02 02220- 13 EAST GIFFORD <br /> RIPublic Works\KeithM\Stormweter Projects\Gifford East\construction Contract\Technical Specifications\Fnal Specifications\Division <br /> ' 2\02220 - Excavation and Backill .doc <br />