Board	Specimen ID	Wood Core As (mg/kg)	Wood Core Cr (mg/kg)	Wood Core Cu (mg/kg)
C-AA	C-AA-BL2	2250	2381	1570
C-AA	C-AA-BL5	1509	1698	1273
C-AA	C-AA-X1	3271	3271	1935
C-AA	C-AA-X2	1713	1862	1291
	N	4	4	4
	Average	2185.7	2302.8	1517.3
	Std. Dev	787.9	707.9	309.9
	RSD	36.0%	30.7%	20.4%
C-AC	C-AC-BL2	2079	2165	1270
C-AC	C-AC-BL5	2493	2742	1745
C-AC	C-AC-X1	2320	2467	1557
C-AC	C-AC-X2	1314	1314	814
	N	4	4	4
	Average	2051.2	2171.9	1346.4
	Std. Dev	520.2	618.7	405.0
	RSD	25.4%	28.5%	30.1%
C-AD	C-AD-BL2	1460	1413	880
C-AD	C-AD-BL4	1956	2000	1296
C-AD	C-AD-BL6	1791	1838	1140
C-AD	C-AD-X1	1716	1665	984
	N	4	4	4
	Average	1730.6	1729.0	1075.2
	Std. Dev	206.5	250.8	182.0
	RSD	11.9%	14.5%	16.9%
C-AE	C-AE-BL2	2187	2153	1245
C-AE	C-AE-BL5	1594	1670	987
C-AE	C-AE-X1	3434	3148	21179
	N	3	3	3
	Average	2405.2	2323.8	7803.6
	Std. Dev	939.4	753.8	11584.3
	RSD	39.1%	32.4%	148.4%
C-AH	C-AH-BL2	1534	1534	869
C-AH	C-AH-BL5	1680	1786	1040
C-AH	C-AH-X1	1640	1594	970
C-AH	C-AH-X2	1333	1333	889
	N	4	4	4
	Average	1546.6	1561.7	941.9
	Std. Dev	155.1	186.6	78.4
	RSD	10.0%	12.0%	8.3%
C-AI	C-AI-BL2	2710	2710	1675
C-AI	C-AI-BL5	3045	3322	1938
C-AI	C-AI-X1	2195	2097	1209
	N	3	3	3
	Average	2650.3	2709.7	1607.3
	Std. Dev	428.2	612.8	369.4
	RSD	16.2%	22.6%	23.0%
C-AK	C-AK-BL2	66	96	57
C-AK	C-AK-BL5	235	258	162
C-AK	C-AK-X1	537	537	312
C-AK	C-AK-X2	65	103	76
	N	4	4	4
	Average	225.6	248.5	151.7
	Std. Dev	222.2	206.2	116.2
	RSD	98.5%	83.0%	76.6%
C-AM	C-AM-BL2	2313	2351	1251
C-AM	C-AM-BL5	2819	2789	1703
C-AM	C-AM-X1	2590	2622	1548
C-AM	C-AM-X2	2600	2627	1608
	N	4	4	4
	Average	2580.4	2597.1	1527.5
	Std. Dev	207.0	181.5	194.8
	RSD	8.0%	7.0%	12.8%
C-AN	C-AN-BL2	454	476	340
C-AN	C-AN-BL5	1379	1379	805
C-AN	C-AN-X1	466	517	336
C-AN	C-AN-X2	1198	1174	681
	N	4	4	4
	Average	874.1	886.8	540.6
	Std. Dev	484.3	458.3	239.0
	RSD	55.4%	51.7%	44.2%
C-AP	C-AP-BL2	2605	2865	1928
C-AP	C-AP-BL5	1995	2126	1339
C-AP	C-AP-X1	2144	2144	1423
C-AP	C-AP-X2	3478	3478	2137
	N	4	4	4
	Average	2555.5	2653.5	1706.5
	Std. Dev	667.7	648.8	387.1
	RSD	26.1%	24.5%	22.7%
C-AS	C-AS-BL2	739	739	514
C-AS	C-AS-BL5	2690	2733	1649
C-AS	C-AS-X1	2422	2338	1420
C-AS	C-AS-X2	110	173	102
	N	4	4	4
	Average	1490.2	1495.9	921.2
	Std. Dev	1261.6	1233.2	733.4
	RSD	84.7%	82.4%	79.6%
C-BE	C-BE-BL2	3154	2867	1749
C-BE	C-BE-BL5	2932	2868	1753
C-BE	C-BE-X1	2578	2451	1496
C-BE	C-BE-X2	2475	2413	1454
	N	4	4	4
	Average	2784.7	2649.8	1612.9
	Std. Dev	314.3	251.9	160.1
	RSD	11.3%	9.5%	9.9%
C-BI	C-BI-BL1	1199	1074	599
C-BI	C-BI-BL4	1360	1332	777
	N	2	2	2
	Average	1279.4	1203.1	688.3
	Std. Dev	114.0	182.6	125.7
	RSD	8.9%	15.2%	18.3%
C-BJ	C-BJ-BL2	2304	2270	1355
C-BJ	C-BJ-BL5	2595	2565	1740
C-BJ	C-BJ-X1	1215	1152	685
	N	3	3	3
	Average	2037.8	1995.6	1260.2
	Std. Dev	727.8	745.1	534.0
	RSD	35.7%	37.3%	42.4%
C-BL	C-BL-BL1	3822	3503	2166
C-BL	C-BL-BL4	3448	3448	2146
C-BL	C-BL-X1	2620	2714	1778
C-BL	C-BL-X2	2741	2985	1828
	N	4	4	4
	Average	3157.9	3162.5	1979.2
	Std. Dev	573.8	378.9	204.9
	RSD	18.2%	12.0%	10.4%
C-BM	C-BM-BL4	172	195	118
C-BM	C-BM-BL7	2806	2806	1888
C-BM	C-BM-X1	1413	1354	795
	N	3	3	3
	Average	1463.8	1451.8	933.4
	Std. Dev	1317.7	1308.3	893.2
	RSD	90.0%	90.1%	95.7%
C-BN	C-BN-BL2	2544	2602	1648
	N	1	1	1
	Average	2544.1	2544.1	2544.1
	Std. Dev	-	-	-
	RSD	-	-	-
C-BO	C-BO-BL1	2288	2179	1308
C-BO	C-BO-BL4	1560	1560	887
C-BO	C-BO-X1	632	599	333
C-BO	C-BO-X2	1595	1616	1028
	N	4	4	4
	Average	1518.7	1488.4	888.8
	Std. Dev	679.7	655.8	410.0
	RSD	44.8%	44.1%	46.1%
C-BP	C-BP-BL2	3189	3479	2175
C-BP	C-BP-BL5	1857	1770	1102
C-BP	C-BP-X1	2765	2995	1889
	N	3	3	3
	Average	2603.7	2748.1	1722.1
	Std. Dev	680.8	881.2	555.3
	RSD	26.1%	32.1%	32.2%
C-BR	C-BR-BL2	1309	1261	727
C-BR	C-BR-X1	1389	1343	764
C-BR	C-BR-X2	1598	1538	939
	N	3	3	3
	Average	1431.9	1380.3	809.9
	Std. Dev	149.1	142.4	113.0
	RSD	10.4%	10.3%	13.9%
C-BT	C-BT-BL2	1386	1367	831
	N	1	1	1
	Average	1385.8	1385.8	1385.8
	Std. Dev	-	-	-
	RSD	-	-	-
C-BU	C-BU-BL2	2770	3001	1682
C-BU	C-BU-X1	2313	2517	1599
C-BU	C-BU-X2	3482	3868	2321
	N	3	3	3
	Average	2855.0	3128.9	1867.3
	Std. Dev	588.9	684.7	395.2
	RSD	20.6%	21.9%	21.2%
C-BW	C-BW-BL2	658	658	400
C-BW	C-BW-X1	233	233	177
C-BW	C-BW-X2	795	823	466
	N	3	3	3
	Average	562.0	571.1	347.5
	Std. Dev	293.5	304.6	151.6
	RSD	52.2%	53.3%	43.6%
C-BX	C-BX-BL2	995	995	676
C-BX	C-BX-BL5	3239	3239	2068
C-BX	C-BX-X1	2879	2879	1859
C-BX	C-BX-X2	2094	2126	1276
	N	4	4	4
	Average	2301.4	2309.6	1469.8
	Std. Dev	993.6	991.5	626.1
	RSD	43.2%	42.9%	42.6%
C-BY	C-BY-BL2	2296	2296	1571
C-BY	C-BY-X1	2118	2330	1652
C-BY	C-BY-X2	3109	3109	2148
	N	3	3	3
	Average	2507.9	2578.5	1790.5
	Std. Dev	528.2	459.8	312.3
	RSD	21.1%	17.8%	17.4%
C-BZ	C-BZ-BL2	1213	1244	698
C-BZ	C-BZ-BL4	1593	2108	1218
C-BZ	C-BZ-BL7	1780	1755	1017
C-BZ	C-BZ-X1	787	838	457
	N	4	4	4
	Average	1343.2	1486.0	847.4
	Std. Dev	439.5	559.1	337.1
	RSD	32.7%	37.6%	39.8%
C-CA	C-CA-BL2	3439	3439	2157
C-CA	C-CA-X1	3571	3571	2143
C-CA	C-CA-X2	2504	2664	1652
	N	3	3	3
	Average	3171.3	3224.6	1983.8
	Std. Dev	581.7	490.2	287.8
	RSD	18.3%	15.2%	14.5%
C-CC	C-CC-BL2	1427	1379	809
C-CC	C-CC-X1	1445	1334	806
	N	2	2	2
	Average	1435.9	1356.5	807.2
	Std. Dev	12.7	32.2	2.0
	RSD	0.9%	2.4%	0.2%
C-CD	C-CD-BL2	1672	1616	947
C-CD	C-CD-BL4	1508	1485	835
C-CD	C-CD-M1	0	0	0
C-CD	C-CD-X1	1596	1550	902
	N	4	4	4
	Average	1194.1	1162.8	671.2
	Std. Dev	798.9	777.0	449.8
	RSD	66.9%	66.8%	67.0%
C-CE	C-CE-BL2	2734	2734	1722
C-CE	C-CE-X1	2117	2117	1319
	N	2	2	2
	Average	2425.5	2425.5	1520.8
	Std. Dev	435.9	435.9	284.8
	RSD	18.0%	18.0%	18.7%
C-E	C-E-BL2	4362	4362	2114
C-E	C-E-BL4	2084	1940	1222
C-E	C-E-X1	2392	2195	1548
	N	3	3	3
	Average	2946.3	2832.7	1627.9
	Std. Dev	1236.1	1330.9	451.5
	RSD	42.0%	47.0%	27.7%
C-N	C-N-BL2	2516	2410	1404
C-N	C-N-BL4	3592	3633	2327
C-N	C-N-X1	2857	2857	1766
	N	3	3	3
	Average	2988.3	2966.6	1832.1
	Std. Dev	549.8	618.7	465.0
	RSD	18.4%	20.9%	25.4%
C-S	C-S-BL2	3915	3781	2046
C-S	C-S-BL5	3986	3941	2373
C-S	C-S-X1	2180	2600	1797
C-S	C-S-X2	4624	4624	2477
	N	4	4	4
	Average	3675.9	3736.5	2173.5
	Std. Dev	1047.1	840.9	310.8
	RSD	28.5%	22.5%	14.3%
	ALL C Boards
	N	107	107	107
	Average	2074.2	2095.8	1465.0
	Std. Dev	990.1	997.4	2016.1
	RSD	48.9%	48.8%	138.6%
	Min	65	96	57
	Max	4624	4624	21179