Xcel Energy - Gas Transportation Service

WestGas InterState
| GAS QUALITY |

DAY	HIGH HV(BTU/CF)	SPEC GRAVITY	WOBBE	CARBON DIOXIDE	NITROGEN	METHANE	ETHANE	PROPANE	I-BUTANE	N-BUTANE	I-PENTANE	N-PENTANE	HEXANES PLUS	TOTAL
11/1/2009	1000.8	0.575	1319.8	1.156	0.965	96.969	0.806	0.076	0.011	0.011	0.002	0.001	0.003	100
11/2/2009	1001.4	0.5745	1321.2	1.119	0.944	97.047	0.781	0.078	0.011	0.012	0.003	0.001	0.004	100
11/3/2009	1000.3	0.5772	1316.6	1.261	1.044	96.663	0.899	0.094	0.014	0.015	0.004	0.002	0.004	100
11/4/2009	997	0.5796	1309.6	1.44	1.196	96.334	0.883	0.103	0.015	0.017	0.004	0.003	0.005	100
11/5/2009	1006.4	0.5827	1318.4	1.346	1.067	95.858	1.415	0.232	0.03	0.031	0.008	0.005	0.008	100
11/6/2009	992.8	0.5881	1294.6	1.901	1.548	95.096	1.224	0.17	0.024	0.023	0.006	0.003	0.005	100
11/7/2009	987	0.5847	1290.8	1.877	1.617	95.617	0.764	0.093	0.012	0.013	0.003	0.001	0.003	100
11/8/2009	987.7	0.5841	1292.4	1.85	1.56	95.722	0.737	0.097	0.013	0.014	0.003	0.001	0.003	100
11/9/2009	991.5	0.5817	1300	1.651	1.404	96.082	0.718	0.103	0.015	0.017	0.004	0.002	0.004	100
11/10/2009	1002.5	0.5761	1320.8	1.161	0.954	96.866	0.849	0.115	0.018	0.021	0.006	0.004	0.006	100
11/11/2009	1002.5	0.5782	1318.4	1.25	1.024	96.566	0.949	0.14	0.024	0.026	0.007	0.006	0.008	100
11/12/2009	996.7	0.5812	1307.4	1.508	1.258	96.137	0.909	0.129	0.021	0.022	0.006	0.004	0.006	100
11/13/2009	1001.9	0.5784	1317.4	1.286	1.026	96.552	0.929	0.136	0.023	0.026	0.008	0.006	0.008	100
11/14/2009	1003.1	0.5762	1321.5	1.155	0.943	96.866	0.842	0.128	0.022	0.025	0.007	0.005	0.007	100
11/15/2009	1005.6	0.5784	1322.2	1.197	0.931	96.604	0.986	0.183	0.034	0.036	0.011	0.008	0.01	100
11/16/2009	1004.1	0.5766	1322.3	1.148	0.927	96.827	0.883	0.142	0.024	0.027	0.008	0.006	0.008	100