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Approximately 2 . 0 ft of subsoil excavation is required in sublateral canals . Cost of replacement embankment shall be included in cost of subsoil excavation . Contractor to coordinate with county representative prior to any subsoil excavation . D . Embankment - General Requirements for Embankment Materials : The following is added after the first paragraph of Subarticle 120 - 7 . 2 : Roadway Design Standard Index No . 505 , Embankment Utilization Details is modified by the addition of the following : Any stratum or stockpile or soil which contains obvious pockets of highly organic material may be designated as muck or unsuitable for construction of subgrade by the Owner . Backfill material containing more than 2 . 0% by weight of organic material , as determined by FM 1 -T 267 and by averaging the test results for three randomly selected samples from each stratum or stockpile of a particular material , shall not be used in construction of the reinforced volume . If an individual test value of the three samples exceeds 3 . 0 % , the stratum or stockpile will not be suitable for construction of the reinforced volume . No A- 8 material permitted in embankment . F . Payment shall be made under : Item No . 120 -3 — Lateral Ditch Excavation — Per Cubic Yard Item No . 120-4 - Subsoil Excavation - Per Cubic Yard " Item No . 120 - 6 - 1 - Embankment - Per Cubic Yard SECTION 00160 STABILIZING A . Sub Article 160 -5 . 1 ( Page 146 ) is modified by the addition of the following : " The stabilization thickness indicated on plans shall be considered a minimum thickness . Thickness will vary to conform to the lines , and grades shown in the plans . " Minimum L . B . R . = 40 - No under-tolerance . B . Payment shall be made under : Item No . 160 -4 - Type B Stabilization ( 12 " ) - Per Square Yard SECTION 00285 OPTIONAL BASE COURSE A . Sub Article 285 -4 is modified by the addition of the following : Base material , thickness and requirements are described in the construction plans . Only one type of alternate base material shall be used No additional payment will be made for base thickness in excess of the specified thickness B . Payment shall be made under : Item No . 285 - 701 - Base Group 1 - Per Square Yard Item No . 285 - 706 - Base Group 6 - Per Square Yard TECHNICAL PROVISIONS TP - 7 FAPublic Works\Capital Projects\Oslo Road Lateral J\BID DOCUMENTS\DIVISION 2 - Technical Provisions . doc