COLLECTION OF SAMPLES FROM WAGONS (Rail and MGR a) For the purpose of sampling each lot as per Clause 5.
COLLECTION OF SAMPLES FROM WAGONS (Rail and MGR a) For the purpose of sampling each lot as per Clause 5.6.1(b) of Coal supplied from one Delivery Point shall be considered as a lot.
b) Each day’s supply as per Clause 5.6.1
COLLECTION OF SAMPLES FROM WAGONS (Rail and MGR a) For the purpose of sampling each lot as per Clause 5.6.1(b) of Coal supplied from one Delivery Point shall be considered as a lot.
b) Each day‟s supply as per Clause 5.6.1(c) shall be considered as one lot for the purpose of sampling in case of coal supplies by MGR.
c) Each lot shall be divided into sub-lots in a manner that the quantity of Coal/number of wagons in such sub-lots is more or less equal. The number of sub-lots shall be determined as under:
d) From each of the sub-lots, one (1) wagon each shall be selected as per random table of IS: 436 (Part I/Section I) 1964 for collection of increments.
e) In each wagon selected for sampling, the sample will be drawn from the spot in a manner so that if in one (1) wagon the sample is collected at one end, in the next wagon the spot will be in the middle of the wagon and in the third wagon at the other end and this sampling procedure will be repeated for subsequent wagons.
f) Before collecting the samples, the spot will be leveled and at least 25 cm of Coal surface shall be removed/scrapped from the top and the place will be leveled for an area of 50 cm by 50 cm.
g) About 50 kg of sample shall be collected from each selected wagon in the lot by drawing 10 increments of approx. 5 kg each with the help of shovel/ scoop.
h) Any stone/shale of size more than that indicated in Schedule II shall be removed/discarded, however all stones/shale of size in terms of Schedule II shall form part of the sample collected.
i) Samples collected from all the selected wagons in a lot shall be mixed separately to form gross sample accordingly.
j) Item (d) to (g) above shall be applicable for Coal supplied in box wagons as well as BOBR wagons where there is no live overhead traction line.
k) In case of having live overhead traction line, TPA shall ensure that the power supply in the overhead traction is switched off to facilitate collection of joint samples from BOX/BOBR wagons pursuant to point 2.2d) to point 2.2g) above.
