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Below Grade Leak InvestigationObservation at the AXIS San Jose

12-19-2011and 12-20-2011

Observations by Michael Hathhorn

Waterproofing Engineer Webcor Builders

Day one 12/19/2011 consisted of investigating the condition of the garage to determine

locations to be tested. The surfaces of the walls of the garage were skim coated with a

concrete product that appeared to have been applied after previous injections. This top

coat was mechanically removed exposing the Shot-Crete wall. Harvey with Harvey Haynes

and Associates made a determination of the locations acceptability for testing.

Below are pictures of the pre-testing investigations: Note -- effervescence and

mineralization samples being removed from one possible test location.

Day two (12-20-2011) consisted of the final selection of the test areas, eight locations werechosen. Following the determination of test locations core samples were removed. The

diameter and depth of the core samples varied based on the intent of the testing and

rebar locations. Rebar was located using a hand scanner. Cores were removed using a

diamond abrasive tubular bit lubricated with water. After the cores were removed the

voids created were patched by Harvey Haynes and Associates.

Eight test locations

1. B3 - @ Space # 372-3732. B3 - @ Space # 378-3793. B3 - @ Space # 3874. B3 - @ Space # 390-3915. B3 - @ Space # 357-3586. B3 - @ Space # 348-3497. B2 - @ Space # 2828. B2 - @ Space # 226

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Test location #1 -- B3 @ Space # 372-373: Harvey stated that this test location was chosen

to show general condition of previous repairs.

Core sample -- The wet line shows the location of the crack in the test sample. Urethane

grout was present in the crack; the grout was viewed with a 40 power gaugingmicroscope.

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Test location #2 -- B3 @ Space # 378-379: Harvey stated that this test location was chosen

to show the condition of the rebar and to see if rusting had occurred.

View of test area -- Rebar is exposed with no rusting visible.

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Test location #3B3 @ Space # 387 Harvey stated that this test location was chosen to

determine if the crack had been previously repaired.

The outcome of the testing was not known in the field.

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Test location #4 -- B3 @ Space # 390-391: Test purpose not known.

View of the coreOutcome of the testing unknown. Urethane grout injection ports were

visible in the test sample.

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Test location #5B3 @ Space # 357-358: The purpose of the test was not stated.

Water intrusion is shown flowing from rear of test area.

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Test location #6 -- B3 @ Space # 348-349: Harvey stated that this test location was chosen

to show if cracking was shallow (above the rebar) or deep (continuing beyond the rebar).

View of the test sample: Crack is shown the continuing the full depth of the core.

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Test location #7 -- B2 @ Space # 282: Active leak exposed when the coating was removed

at the test area. Harvey stated that this test location was chosen to expose the rebar at

the test area.

Water intrusion is shown flowing from test area.

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Test #8 -- B2 @ Space # 226: Purpose of testing not stated.

Test sample no field conclusion was stated based on the test sample.