Section 326 IAC 3-7-2 - Coal sampling and analysis methodsAuthority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11
Affected: IC 13-14-4-3; IC 13-15; IC 13-17
Sec. 2.
(a) Owners or operators of coal sampling systems for sources with total coal-fired capacity greater than or equal to one thousand five hundred (1,500) million British thermal units (Btu) per hour actual heat input shall follow procedures specified in ASTM D2234-89*, "Standard Methods for Collection of a Gross Sample of Coal", unless otherwise provided in section 3 of this rule. Additionally, the coal sampling system shall meet the following requirements: (1) The coal sample acquisition point shall be at a location where representative samples of the total coal flow to be combusted by the emissions unit may be obtained. A single as-bunkered sampling station may be used to represent the coal to be combusted by multiple emissions units using the same stockpile feed system.(2) The increment collection method to be used is specified in ASTM D2234-89*, Table 1, I-A-1, I-B-1, or I-C-1.(3) The opening of the sampling device shall be at least two and one-half (2.5) times the top-size of the coal and not less than one and one-fourth (1.25) inches.(4) The sampling device shall have sufficient capacity to completely retain or entirely pass the increment without loss or spillage.(5) The velocity with which the cross-stream cutting instrument travels through the stream shall not exceed eighteen (18) inches per second. The velocity requirement shall not apply to a swing-arm sampler or to a sampler whose cutter opening is perpendicular to the stream of coal. Owners or operators of all coal sampling systems shall detail the proper operating procedures in the standard operating procedures document required under section 5 of this rule.(6) Increments obtained during the sampling period shall be protected from changes in composition to maintain the integrity of constituent characteristics required to convert sample sulfur content to units of the applicable emission standard.(7) A comparison of weight or volume of collected sample with that of the total flow of coal shall be conducted at a minimum of one (1) time every two (2) weeks to assure a constant sampling ratio is maintained for increments composited into a sample representing a single twenty-four (24) hour period.(8) A routine inspection of the sampling system shall be established to meet requirements and guidelines specified in ASTM D4702-87*, "Guide for Inspecting Mechanical Coal Sampling Systems that Use Cross-Cut Sample Cutters for Conformance with Current ASTM Methods".(9) Composite samples shall be collected for analysis at a minimum of one (1) time per twenty-four (24) hour period.(b) Owners or operators of coal sampling systems for sources with total coal-fired capacity between one hundred (100) and one thousand five hundred (1,500) million Btu per hour actual heat input shall comply with requirements: (2) in section 3 of this rule; or(3) shall meet the following minimum requirements:(A) The coal sample acquisition point shall be at a location where representative samples of the total coal flow to be combusted by the emissions unit may be obtained. A single as-bunkered or as-burned sampling station may be used to represent the coal to be combusted by multiple emissions units using the same stockpile feed system.(B) Coal shall be sampled at least three (3) times per day and at least one (1) time per eight (8) hour period unless no coal is bunkered during the preceding eight (8) hour period.(C) Minimum sample size shall be five hundred (500) grams.(D) Samples shall be composited and analyzed at the end of each calendar month.(c) Coal samples shall be prepared for analysis in accordance with procedures specified in ASTM D2013-86*, "Standard Method of Preparing Coal Samples for Analysis". The preparation of samples shall meet the following requirements: (1) Samples shall be prepared in accordance with ASTM D2013-86*, Procedure A or Procedure B.(2) Sample preparation shall be checked at weekly intervals by performing a split sample of the twenty-four (24) hour composite sample and preparing and analyzing these two (2) identically.(d) The heat content of coal samples shall be determined in accordance with procedures specified in ASTM D2015-95*, "Standard Test Method for Gross Calorific Value of Solid Fuel by the Adiabatic Bomb Calorimeter", or ASTM D3286-91A*, "Standard Test Method for Gross Calorific Value of Coal and Coke by the Isothermal Jacket Bomb Calorimeter". Restandardization requirements in Section 11 of both methods shall be followed. Precision requirements for repeatability shall be verified according to Section 16.1.1 of both methods at a minimum of once per week.(e) The sulfur content of coal samples shall be determined according to procedures specified in ASTM D3177-89*, "Standard Test Methods for Total Sulfur in the Analysis Sample of Coal and Coke", or ASTM D4239-94*, "Standard Test Methods for Sulfur in the Analysis Sample of Coal and Coke Using High Temperature Tube Furnace Combustion Methods". Precision requirements for repeatability shall be verified according to ASTM D3177-89*, Section 13, or ASTM D4239-94, Section 18*, at a minimum of one (1) time per week. The laboratory that performs the analysis shall participate in an interlaboratory audit program using coal samples supplied by the department.(f) The department may approve minor modifications to the coal sampling and analysis procedures at a source upon demonstration by the source owner or operator that the minor modifications are necessary to meet the requirements of this section. *These documents are incorporated by reference. Copies are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.
Air Pollution Control Board; 326 IAC 3-7-2; filed Jan 30, 1998, 4:00 p.m.: 21 IR 2075; readopted filed Jan 10, 2001, 3:20 p.m.: 24 IR 1477; errata filed Dec 12, 2002, 3:35 p.m.: 26 IR 1567; filed Aug 26, 2004, 11:30 a.m.: 28 IR 38; filed Aug 11, 2011, 1:54 p.m.: 20110907-IR-326050330FRA