Exhibit RC-4B Page 1 of 534 PHASE I ENVIRONMENTAL SITE ASSESSMENT 75 Acre Magellan Parcel El Paso, Texas AMEC REF. NO. 1167171140 Submitted To: El Paso Electric Company Environmental Affairs Department P.O. Box 982 El Paso, TX 79960 Submitted By: AMEC Environment & Infrastructure, Inc. 125 Montoya Road El Paso, Texas 79932 January 16, 2012 Exhibit RC-4B Page 2 of 534 January 16, 2012 AMEC Ref. No. 1167171140 El Paso Electric Company Environmental Affairs Department P.O. Box 982 El Paso, TX 79960 Attention: Mr. Mark Hoffman Re: Phase I Environmental Site Assessment 75 Acre Tract, Magellan Parcel El Paso, Texas Dear Mr. Hoffman: AMEC Environment & Infrastructure, Inc. (AMEC) is pleased to present our report documenting the results of a Phase I Environmental Site Assessment (ESA) of the above referenced property. This report includes discussions concerning our assessment methods, the scope of work performed, the history of development, a description of soil and groundwater conditions, and a discussion of the potential for regulated materials or conditions on or near the subject site. Should you have any questions concerning this report please contact us at your convenience. Respectfully submitted, AMEC Environment & Infrastructure, Inc. Reviewed by: Texas Registered Engineering Firm F-0012 Texas Registered Geoscience Firm 50184 Jamie Barnes, PG Mark Weatherly, PG Principal Project Manager
[email protected] [email protected] P:\ENG_data\2011 Jobs\1167171140 Phase I 75 Acre Magallen Parcel\Final Report\Phase I ESA_FINAL.doc AMEC Environment & Infrastructure, Inc. 125 Montoya Road El Paso, Texas 79932 USA Tel (915) 585-2472 Fax (915) 585-2626 www.amec.com/earthandenvironmental Exhibit RC-4B Page 3 of 534 AMEC Ref No.