Phase I Environmental Site Assessments

OGI Environmental LLC personnel have performed well over 10,000 environmental site assessments in Clark County and have successfully conducted environmental site assessments and resolved environmental liability issues throughout the United States. OGI Environmental LLC's environmental site assessments meet or exceed the requirements of ASTM Standard Practice E1527-05 including site inspection, off-site reconnaissance, regulatory records review, review of ownership/usage history, and data evaluation and recommendations.

Pole-Mounted Transformers

OGI Environmental LLC's in-house research library contains complete and current databases, historical fire insurance maps, current and historical aerial photography and topographic maps, and geologic and soils reference materials. OGI Environmental LLC maintains computerized databases, including available state and federal lists of hazardous and/or regulated facilities. OGI Environmental LLC also maintains a current list of Nevada Division of Environmental Protection (NDEP) and Southern Nevada Health District (SNHD) citations and enforcement actions.

The purpose of a Phase I Environmental Site Assessment (ESA) is to accumulate non-intrusive data to be used in evaluating the level of environmental risk associated with a given site and in identifying Recognized Environmental Conditions. The Phase I ESA scope of work is performed in general accordance with the ASTM E 1527-05 for conducting environmental site assessments. A Phase I ESA consists primarily of the following components:

• An on-site reconnaissance of the property, including a cursory observation of adjacent properties;
• Interviews with owners/occupants and local government officials to obtain information indicating recognized environmental conditions in connection with the property;
• A review of various records to help identify recognized environmental conditions in connection with the subject property and nearby properties; and
• Preparation of a final report which details the assessment findings and includes supporting documentation.

OGI Environmental LLC's scope of service for a Phase I ESA is described in more detail in the following paragraphs.

• Consistent with ASTM E 1527-05, outlined below are the following federal and state records which are typically reviewed for indications of an environmental concern, and the approximate minimum search distance of the review from the nearest property boundary.

• Additional state or local information sources may also be checked depending on site specific circumstances. All of the above sources generally provide names and locations of sites which have been reported to regulatory agencies because of certain environmental conditions or hazardous substances which currently exist or have at one time existed at a site. Additional or more detailed information is not typically given in the listings. If sites are identified as being within the specified search distance, these sites will be reported. In some cases we will check with regulatory agencies or property owners concerning sites with reported environmental problems or incidents.
• Key individuals, who may have knowledge of the subject property and/or pertinent facility operations, will be contacted for interviewing. Interviews may take place during the site visit or at another time by telephone or in person. The Client and/or OGI Environmental LLC should identify a person for interviewing who is knowledgeable of the uses and physical characteristics of the subject property. The person interviewed will be asked questions regarding a number of concerns as outlined in ASTM E 1527-05.
• Prior to the site visit, pertinent individuals will be asked to provide copies of helpful documents (if they exist) for OGI Environmental LLC to review. If the required documents are available, OGI Environmental LLC will need to review the documents prior to conducting the site visit. Also prior to the site visit specific questions regarding environmental litigation, administrative proceedings, and governmental notices will be asked of pertinent individuals. The report user will also be asked to provide the following:

1. Specialized knowledge or experience material to recognized environmental conditions in connection with the site.
2. Actual knowledge of environmental liens or activity and use limitations encumbering the site or in connection with the site.
3. Reason for significantly lower purchase price due to the presence of hazardous substances or petroleum products.
4. Commonly known or reasonably ascertainable information within the local community about the site that is material to recognized environmental conditions in connection with the site.
5. Proceedings involving the site including pending, threatened or past environmental litigation, proceedings or notices of possible violations of environmental laws or liability in connection with the site.
6. Recorded land title records and lien records recorded against the site to identify environmental liens and activity and use limitations.

• OGI Environmental LLC will review historic sources which date back to approximately 1940 or, if the property was developed prior to 1940, dating back to the time when the property was undeveloped. Such information will be reviewed provided that the information is reasonably ascertainable. These historic sources will include one or more of the following: aerial photographs, fire insurance (Sanborn) maps, tax assessor files, land-title records, street directories, United States Geological Survey topographic maps, and interview responses.
• A site reconnaissance will be conducted at the subject property by an OGI Environmental LLC representative to identify relevant environmental concerns. The subject property and structures (if present) will be visually observed, as well as accessible common areas within these structures. The general site setting including current and past property usage, geologic and topographic conditions, and surrounding property usage will be noted to the extent which they are readily identifiable. Indications of the usage, treatment, storage, disposal or generation of hazardous substances and petroleum products will also be noted. These may include such items as storage tanks, drums, stained soil, chemical odors, and pooled liquids.

55-Gallon Drums

• In addition, a cursory observation of adjoining properties will be performed. Adjoining property will be assessed based on what is readily observable from the subject site or public rights-of-way.
• A final report will be prepared which details the results of this assessment, based upon the scope of work described herein. Although not required by the standard, OGI Environmental LLC may provide recommendations, where appropriate, should environmental concerns be identified during the assessment.