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Water Storage Pond Compacted Clay Liner <br />Parcel 1, V/2. 5WA, Section 35, T1S, R67W <br />Adams County, Colorado <br />Soil index property tests, including Atterberg limits (ASTM <br />D4318) and percent finer than the #200 Sieve (ASTM D422) to <br />be performed for each Proctor sample. <br />• In-place Dry Density and Moisture Content - Nuclear Gauge <br />(ASTM D2922 and D3017) <br />0 In-place Dry Density and Moisture Content- Sand Cone <br />(ASTM D1556) <br />• Hydraulic Conductivity Tests on the Liner Clay <br />(e.g., ASTM D5084) <br />1 test per 500 yd3 <br />1 test per 5,000 yd3 <br />1 test per 25,000 yd3 <br />Testing reports should.be prepared daily by engineering technicians. The handwritten <br />field copy(iss) of these reports should be submitted to the contractor and/or construction <br />manager daily. Test reports should include applicable specifications and descriptions, <br />test locations, date of testing, control requirements, pass/fail of the individual tests, test <br />results, and any re-tests or other methods taken by the Contractor to address <br />deficiencies. <br />Upon completion of construction of the liner, the geotechnical engineer should prepare a <br />summary report regarding the work done, a summary of the field and laboratory test data <br />obtained, resolution of deviations or deficiencies from project specifications, and a <br />professional engineering opinion regarding the compliance of the construction with the <br />plans and specifications. <br />CLOSURE <br />Geotechnical Review The poor performance of many earthworks and subsurface <br />structures has been directly attributed to inadequate geotechnical review and earthwork <br />quality control. Therefore, a geotechnical engineer should be retained to review project <br />plans and specifications to evaluate whether they comply with the intent of the <br />recommendations in this report. The author of this report and/or the reviewing engineer <br />should be contacted directly to provide this review. The review should be reported in <br />writing. <br />Project earthwork operations should be observed by a geotechnical engineer. All <br />excavations should be observed by the geotechnical engineer prior to placement of fill or <br />Job No. 09-3090 GROUND Engineering Consultants, Inc. Page 8