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TAG provides:  
·         Phase I   - Due Diligence Investigation 
·         Phase II  - Subsurface Investigation
.         Phase III - Risk-Based Corrective Action 
·         Transaction Screening 

Environmental Site Assessments (ESA) are typically required by financial lending institutions to determine if their are any environmental liability associated with funding the purchase of an commerical or industrial property to create an "Innocent Purchaser Defense" pursuant to the EPA's Final Rule for conducting an "All Appropriate Inquiries" effective November 1st, 2006 under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)  § § 101(40) and 107(r) as amended by the Small Business Liability Relief and Brownfields Revitalization Act, (SABRA or the 2002 Brownfield Ammendments to CERCLA).

To create the Innocent Purchaser Defense in the State of Oregon under the Public Practice of Geology Rules pursuant to the EPA's Final Rule for conducting an All Appropriate Inquiries under the EPA' s definition of Environmental Professionals, only a Registered Geologist or Certified Engineering Geologist is qualified to testify as an expert wittiness when geological or hydrogeological information is required to be sumitted as admissable evidence in litigation.

Click HERE to view the EPA website for the Final Rule for conducting an All Appropriate Inquiries.

Phase I ESA is an investigation that determines the potential for contamination of soil, water, buildings, etc. on a property. The Phase I ESA process involves a thorough examination of current and past use of the site as well as surrounding activities. This includes reviewing historical information such as aerial photography, land titles, deeds and site maps; obtaining government records; an onsite visit; and personal interviews.

The Phase I ESA is to determine the presence or likely presence of any hazardous substances or petroleum products on the property under conditions that indicate an existing release, a past release, or a materials threat of a release of any hazardous substances or petroleum products into the ground, groundwater, or surface water of the property.

In some case, the findings of a Phase I ESA may determine that a Phase II ESA is warranted. A Phase II ESA entails a more in depth investigation of the site and can include a drilling program to collect soil and groundwater samples for laboratory analysis.

TAG has completed numerous ESA's at former gasoline service stations, paint manufacturing, bulk-oil and chemical storage facilities, office and apartment buildings, including various commercial and industrial business site settings.

TAG incorporates within all our ESA's the ASTM International Standards, (formerly American Society for Testing Materials Standards) listed below:

Phase I   - E1527- 05 
Phase II  - E1903- 97
Phase III - E2081- 00
Transaction Screening - E1528 - 06

Phase II ESA's confirm or deny Phase I ESA findings through subsurface soil, soil gas survey, groundwater monitoring and/or other material investigation, sampling and analysis. The scope-of-work may include performing a site characterization, collecting and interpreting fate and transport data and/or determining site specific cleanup levels through a State’s Policy or ASTM’s Risk-Based Corrective Action Publication.

TAG specializes in Phase II ESA's and Phase III Risk-Based Corrective Action for releases from underground storage tanks at gasoline service stations, paint manufacturing plants, bulk-oil and chemical storage facilities and other potentially higher risk commercial real estate.

TAG has experience conducting Phase II Subsurface Investigations and Phase III Risk-Based Corrective Action in Oregon, California, Arizona, and Idaho to evaluate the nature, extent, and impact of release from a variety of sources, including waste management facilities, underground storage tanks, process spills and uncontrolled hazardous waste spills.

TAG is well versed in the various drilling techniques listed below:

Ingersoll Rand and Speedstar Rotary:
 
Air rotary equipped to do air rotary casing hammer, air rotary under-ream, mud rotary wireline coring or with sampling through the drill rods. Support equipment includes threaded casing from 16” to 7” diam., support trucks with hydraulic cranes, mud systems & pumps, casing jacks, forklifts, auxiliary air compressors, etc.

Ingersoll Rand and Gus Pech Rotary:

Long-stroke Mud Rotary designed for high production wireline coring. Coring tools available from 1.5” to 5”. Equipped with mud pumps, water trucks, etc.

Sonic CS-500:

The Roto-sonic 500 offer an unparalleled ability to collect continuous core samples in many conditions. Includes hydraulic rod spinners, threaded casing from 5” to 12”, support trucks with cranes, water tanks, etc.

RO Completion: 

RO well completion rigs can nearly double productivity of air rotary or sonic by positioning over the hole to set the well once total depth has been reached.

CME 75 High Torque, CME 85 High Torque, CME 95 High Torque:

These late model rigs are truck mounted and equipped for hollow-stem auger, mud rotary drilling, and rock coring with high torque configuration for difficult drilling conditions; most have 140 lb. and 300 lb. auto-hammers and are capable of drilling at angle. Auger sizes range from 4” to 18” O.D.

Track Rigs - CME 75:

Equipped for hollow stem auger , mud rotary, and rock coring. High Torque configuration capable of angle drilling and available with 140 and 300 lb. auto-hammer w/ auger sizes range from 4” to 18” O.D.

Limited Access Track CME 55, CME 75:

Powerful, self-propelled hollow-stem auger, mud rotary drilling in close quarters, under canopies, and inside buildings. Minimum clearances range from 12’ overhead, 6’ width. Wells up to 8” diameter.

Direct Push (Probe) - Full size & Limited Access Track Probe:

Capable of angle probe, small diam auger drilling, to collect soil, soil vapor, and groundwater samples.

Smeal Development:

Four wheel drive truck mounted to surge, bail, and pump 2” to 8” wells, up to 300’ deep w/ pumps and flow meters available.

Vac/Air Knife:

Vac-N-Dig System 3 for hole clearance to safely locate utilities. Vacuumed soils safely retained for backfill or disposal.