DDBPE
Civil/Environmental
- May 30, 2013
- 51
We have an order to supply bedding material for a stream restoration project. The specifications indicates percentages of various size materials ranging from 3" up to 27". We are blending several commonly produced quarry materials to achieve the desired gradation.
The Environmental Engineer for the project has been on site and is rejecting some of the material for gradation after it has been placed. The Engineers method for sampling is to have several other staff members on site, they walk around, then look up, close there eyes and reach down and whichever rock they touch is part of the sample. Then they measure the rock. They perform this blind game until they have touched 100 rocks.
The Engineers initially claimed there was no 27" material, although they could see it, they did not touch it during the sampling game. Now they claim there is not enough smaller material, same game method.
Has anyone heard of this sampling method and if so, where is it written?
I have sent them a copy of ASTM D5519-07, Standard Test Methods for Particle Size Analysis of Natural and Man-Made Riprap Materials.
Thank you for any help.
The Environmental Engineer for the project has been on site and is rejecting some of the material for gradation after it has been placed. The Engineers method for sampling is to have several other staff members on site, they walk around, then look up, close there eyes and reach down and whichever rock they touch is part of the sample. Then they measure the rock. They perform this blind game until they have touched 100 rocks.
The Engineers initially claimed there was no 27" material, although they could see it, they did not touch it during the sampling game. Now they claim there is not enough smaller material, same game method.
Has anyone heard of this sampling method and if so, where is it written?
I have sent them a copy of ASTM D5519-07, Standard Test Methods for Particle Size Analysis of Natural and Man-Made Riprap Materials.
Thank you for any help.