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t ; from the same mix design and the same production facility is less than the specified minimum R` plus two standard deviations , the maximum production quantity represented by the LOT will return to 50 yd3 . In order to reinitiate reduced frequency, a new set of strength test results will be required. k : f SUBARTICLE 346 - 9 . 4 (Pages 335 — 336) is deleted and the following substituted : 346-9 .4 Acceptance of Concrete : Accept or reject concrete on the basis of plastic property results in accordance with 346 - 6 .4 . Ensure that the hardened concrete strength test results are obtained in accordance with 346 -9 . 3 . Do not discard a cylinder strength test result based on low strength (strength below the specified minimum strength as h the provisions of this Section) . per When one of the three QC cylinders from a LOT is lost, damaged or destroyed, determination of compressive strength will be made by averaging the remaining two cylinders . If more than one QC cylinder from a LOT is lost, damaged or destroyed, the Contractor will core the structure at no additional expense to the Department to determine the compressive strength . [ Acceptance of LOT may be based on verification data at the discretion of the Engineer . Obtain the approval of the Engineer to core, and of the core location prior to coring. For each QC cylinder that is lost, damaged or destroyed, payment for that LOT will be reduced by $ 750 . 00 per 1 , 000 psi of the specified design strength [Example : loss of two Class IV (Drill Shaft) QC cylinders that has no verification data will require the element to be cored and a penalty will be assessed (4 , 000 psi / 1 , 000 psi) x $ 750 x 2 = $ 6 , 000 . This reduction will be in addition to any pay adjustment for low strength . When QC compressive strength test results are not verified, the resolution procedure will be used to accept or reject the concrete . Maintain the "hold" cylinders until the verification of the compressive strength test results . When QC test results are verified, the Engineer will accept the concrete based on QC test results . The Engineer will accept at full pay only LOTs of concrete represented by plastic property results which meet the requirements of the approved mix design and strength test results which equal or exceed the respective specified minimum strength . SUBARTICLE 346 - 9 . 6 (Page 337 ) is deleted and the following substituted : 346-9 . 6 Small Quantities of Concrete : When a project has a total plan quantity of less than 50 yd3 , that concrete will be accepted based on the satisfactory compressive strength of the QC cylinders . Provide certification to the Engineer that the concrete was batched and placed in accordance with the Contract Documents . Submit a quality control plan for the concrete placement operation in accordance with Section 105 . In addition, the Engineer may conduct Independent Verification (IV) testing as identified in 346 - 9 . Evaluate the concrete in accordance with 346- 10 at the discretion of the Engineer . - 125 - FPID ( S ) : 423186 - 1 - 58 -01