Board Specimen ID Wood Core As (mg/kg) Wood Core Cr (mg/kg) Wood Core Cu (mg/kg)  
A-AB A-AB-BL2 2350 2930 1739  
A-AB A-AB-BL5 2006 2480 1758  
A-AB A-AB-X2 2089 2704 1598  
  N 3 3 3  
  Average 2148.4 2704.3 1698.4  
  Std. Dev 179.2 224.9 87.9  
  RSD 8.3% 8.3% 5.2%  
A-AC A-AC-BL2 1845 2194 1396  
A-AC A-AC-BL5 1622 2059 1261  
A-AC A-AC-X1 1068 1745 1146  
A-AC A-AC-X2 1465 1838 1093  
  N 4 4 4  
  Average 1499.9 1959.0 1224.0  
  Std. Dev 327.5 204.7 134.6  
  RSD 21.8% 10.5% 11.0%  
A-AD A-AD-BL2 2636 3217 1877  
A-AD A-AD-BL5 2592 3645 1782  
A-AD A-AD-X1 2761 3408 1977  
A-AD A-AD-X2 2712 2851 1530  
  N 4 4 4  
  Average 2675.3 3280.5 1791.4  
  Std. Dev 75.5 335.5 191.6  
  RSD 2.8% 10.2% 10.7%  
A-AE A-AE-BL2 640 832 480  
A-AE A-AE-BL5 441 465 318  
A-AE A-AE-X1 2271 2743 1563  
A-AE A-AE-X2 52 52 80  
  N 4 4 4  
  Average 851.1 1023.2 610.5  
  Std. Dev 977.9 1190.2 656.1  
  RSD 114.9% 116.3% 107.5%  
A-AF A-AF-BL2 1288 1545 927  
A-AF A-AF-X1 1414 1625 903  
A-AF A-AF-X2 1571 1905 1119  
  N 3 3 3  
  Average 1424.4 1691.5 982.9  
  Std. Dev 142.2 188.9 118.5  
  RSD 10.0% 11.2% 12.1%  
A-AG A-AG-BL2 1400 1680 887  
A-AG A-AG-BL5 1790 2314 1388  
A-AG A-AG-X1 1910 2235 1219  
A-AG A-AG-X2 2361 2680 1659  
  N 4 4 4  
  Average 1865.1 2227.3 1288.3  
  Std. Dev 395.9 413.3 323.4  
  RSD 21.2% 18.6% 25.1%  
A-AH A-AH-BL2 1454 1702 993  
A-AH A-AH-BL5 805 1014 566  
A-AH A-AH-X1 1926 2235 1376  
A-AH A-AH-X2 240 224 148  
  N 4 4 4  
  Average 1106.0 1293.7 770.8  
  Std. Dev 738.1 871.1 530.6  
  RSD 66.7% 67.3% 68.8%  
A-AJ A-AJ-BL2 1868 2210 1503  
A-AJ A-AJ-BL5 1053 1342 711  
A-AJ A-AJ-X1 1972 2478 1542  
A-AJ A-AJ-X2 61 2002 607  
  N 4 4 4  
  Average 1238.3 2007.8 1090.7  
  Std. Dev 886.2 484.7 501.1  
  RSD 71.6% 24.1% 45.9%  
A-AK A-AK-BL2 660 689 459  
A-AK A-AK-BL5 3213 3481 1954  
A-AK A-AK-X1 1605 1789 1000  
A-AK A-AK-X2 2557 2813 1611  
  N 4 4 4  
  Average 2008.6 2192.7 1256.0  
  Std. Dev 1115.4 1220.4 661.9  
  RSD 55.5% 55.7% 52.7%  
A-AN A-AN-BL2 2056 2656 1599  
A-AN A-AN-BL5 1925 2434 1635  
A-AN A-AN-X2 2369 2879 1769  
  N 3 3 3  
  Average 2116.7 2656.0 1667.6  
  Std. Dev 228.0 222.4 89.7  
  RSD 10.8% 8.4% 5.4%  
A-AR A-AR-BL2 222 317 184  
A-AR A-AR-BL5 220 326 190  
A-AR A-AR-X1 1039 1260 685  
A-AR A-AR-X2 50 94 65  
  N 4 4 4  
  Average 382.8 499.1 281.1  
  Std. Dev 444.9 518.6 275.6  
  RSD 116.2% 103.9% 98.1%  
A-AT A-AT-BL2 2144 2647 1675  
A-AT A-AT-BL4 2053 2972 1810  
A-AT A-AT-X1 2361 2519 1574  
A-AZ A-AZ-BL2 3445 3732 2067  
  N 4 4 4  
  Average 2501.0 2967.5 1781.7  
  Std. Dev 642.6 544.5 213.5  
  RSD 25.7% 18.4% 12.0%  
A-BC A-BC-BL2 1680 2210 1304  
A-BC A-BC-BL4 1933 2770 1760  
A-BC A-BC-X1 1926 2652 1484  
  N 3 3 3  
  Average 1846.0 2543.7 1515.8  
  Std. Dev 144.2 295.1 229.7  
  RSD 7.8% 11.6% 15.2%  
A-BE A-BE-BL2 40 34 21  
A-BE A-BE-BL5 28 34 29  
A-BE A-BE-X1 39 42 33  
  N 3 3 3  
  Average 35.7 36.6 27.4  
  Std. Dev 6.4 4.6 6.2  
  RSD 18.1% 12.6% 22.5%  
A-BG A-BG-BL2 2641 2996 1774  
A-BG A-BG-BL5 1814 2409 1427  
A-BG A-BG-BL6 1970 2214 1328  
A-BG A-BG-X1 2327 2738 1643  
  N 4 4 4  
  Average 2188.1 2589.0 1543.0  
  Std. Dev 370.5 346.8 202.2  
  RSD 16.9% 13.4% 13.1%  
A-BN A-BN-X1 1521 1741 1079  
  N 1 1 1  
  Average 1521 1741 1079  
  Std. Dev - - -  
  RSD - - -  
A-BW A-BW-BL2 1363 1525 876  
A-BW A-BW-BL5 1541 1860 1150  
  N 2 2 2  
  Average 1452.3 1692.5 1013.2  
  Std. Dev 126.1 236.2 193.5  
  RSD 8.7% 14.0% 19.1%  
A-BY A-BY-BL2 1395 1594 963  
A-BY A-BY-BL5 968 1162 726  
A-BY A-BY-X1 1086 1456 888  
  N 3 3 3  
  Average 1149.7 1404.1 859.3  
  Std. Dev 220.3 220.7 121.1  
  RSD 19.2% 15.7% 14.1%  
A-I A-I-BL2 2356 2518 1381  
A-I A-I-BL4 1594 1958 1002  
A-I A-I-X1 1909 2334 1273  
  N 3 3 3  
  Average 1953.0 2270.1 1218.6  
  Std. Dev 382.9 285.5 195.3  
  RSD 19.6% 12.6% 16.0%  
A-L A-L-BL2 1850 2210 1394  
A-L A-L-X1 1435 1991 1263  
A-L A-L-X2 1246 1661 962  
  N 3 3 3  
  Average 1510.1 1954.2 1206.2  
  Std. Dev 309.2 276.7 221.6  
  RSD 20.5% 14.2% 18.4%  
A-N A-N-BL2 557 673 371  
A-N A-N-BL5 1985 2361 1556  
A-N A-N-X1 849 1083 615  
A-N A-N-X2 1080 1218 758  
  N 4 4 4  
  Average 1117.7 1333.5 825.0  
  Std. Dev 616.5 722.8 512.7  
  RSD 55.2% 54.2% 62.1%  
A-O A-O-BL5 1541 1859 1089  
A-O A-O-X1 1638 2434 1461  
A-O A-O-X2 1617 2281 1327  
  N 3 3 3  
  Average 1598.4 2191.4 1292.2  
  Std. Dev 51.2 297.7 188.2  
  RSD 3.2% 13.6% 14.6%  
A-P A-P-BL2 1925 2567 1412  
A-P A-P-BL5 1920 2259 1280  
A-P A-P-X1 1446 1743 935  
  N 3 3 3  
  Average 1763.6 2189.6 1209.0  
  Std. Dev 275.4 416.1 245.9  
  RSD 15.6% 19.0% 20.3%  
A-Q A-Q-BL2 3036 3806 2186  
A-Q A-Q-BL5 2405 2969 2167  
A-Q A-Q-X1 2206 2758 1655  
  N 3 3 3  
  Average 2549.2 3177.5 2002.8  
  Std. Dev 433.5 554.1 301.6  
  RSD 17.0% 17.4% 15.1%  
A-R A-R-BL2 2265 2741 1669  
A-R A-R-BL5 1427 2470 1392  
A-R A-R-X2 2050 2609 1615  
  N 3 3 3  
  Average 1913.6 2606.8 1558.4  
  Std. Dev 435.3 135.5 146.8  
  RSD 22.7% 5.2% 9.4%  
A-S A-S-BL2 1662 1977 1146  
A-S A-S-BL5 1534 1790 1001  
A-S A-S-X1 1483 1707 935  
  N 3 3 3  
  Average 1559.7 1824.3 1027.1  
  Std. Dev 92.3 138.3 107.8  
  RSD 5.9% 7.6% 10.5%  
A-T A-T-BL2 1911 2357 1335  
A-T A-T-X1 1831 2160 1338  
A-T A-T-X2 2041 2432 1454  
  N 3 3 3  
  Average 1927.8 2316.2 1375.7  
  Std. Dev 105.9 140.7 67.6  
  RSD 5.5% 6.1% 4.9%  
A-U A-U-BL2 41 38 44  
A-U A-U-X1 1729 2255 1378  
  N 2 2 2  
  Average 885.0 1146.3 711.3  
  Std. Dev 1193.5 1568.0 943.0  
  RSD 134.9% 136.8% 132.6%  
A-V A-V-BL2 678 945 484  
A-V A-V-X1 503 686 366  
A-V A-V-X2 1098 1407 755  
  N 3 3 3  
  Average 759.8 1012.6 535.1  
  Std. Dev 305.4 364.8 199.2  
  RSD 40.2% 36.0% 37.2%  
A-X A-X-BL2 2304 2823 1584  
A-X A-X-BL5 1335 2328 1583  
A-X A-X-X1 1714 2034 1278  
A-X A-X-X2 1494 2365 1401  
  N 4 4 4  
  Average 1711.8 2387.5 1461.6  
  Std. Dev 424.4 325.8 149.6  
  RSD 24.8% 13.6% 10.2%  
A-Y A-Y-BL2 2704 3075 1791  
A-Y A-Y-BL5 2169 2742 1571  
A-Y A-Y-X1 3218 3933 2181  
  N 3 3 3  
  Average 2696.8 3250.2 1847.6  
  Std. Dev 524.4 614.1 309.0  
  RSD 19.4% 18.9% 16.7%  
A-Z A-Z-BL5 1818 2392 1388  
A-Z A-Z-X1 3234 3594 1993  
A-Z A-Z-X2 2436 2779 1475  
  N 3 3 3  
  Average 2496.0 2921.6 1618.5  
  Std. Dev 710.0 613.2 327.1  
  RSD 28.4% 21.0% 20.2%  
For All A Boards For All A Boards  
  N 104 104 104  
  Average 1645.4 2045.3 1203.4  
  Std. Dev 787.7 917.0 543.5  
  RSD 47.9% 44.8% 45.2%  
  Min 28 34 21  
  Max 3445 3933 2186