36E77618B0090-0005005.pdf

Alta Environmental

3777 Long Beach Boulevard Annex Building Long Beach CA 90807 United States of America T (562) 495 5777 F (562) 495 5877 Toll-free (800) 777-0605 altaenviron.com

REPORTED: October 1, 2015 PROJECT NO.: HMCA-15-5331R

CLIENT: HMC Architects

341 South Cedros Avenue

Solana Beach, California 92075

ATTENTION: Mr. Tre Arnold

REF:

Limited Visual Inspection and Document Review of Veterans Affairs San Diego Healthcare System Building 1, West Wing Floors 1-4 and Basement

1 INTRODUCTION

1.1 Background Information

Alta Environmental was retained by the Architects’ s representative, Mr. Tre Arnold, to review data collected by Citadel Environmental at the Veterans Affairs San Diego Healthcare System (VASDHS-3350 La Jolla Village Drive, San Diego, California) following a significant water intrusion which occurred on August 7, 2015.

It is our understanding that this water intrusion discharged an estimated volume of 150,000 to 200,000 gallons of water as an apparent result of damage sustained to a fire sprinkler located within a construction containment area located in the north-west corner of the 4th floor West Wing

The affected areas included the west wing of floors 1 through 4 and the Basement level. Efforts to extract water and dry the area were reportedly started shortly after the event and the VASDHS Engineering Standard Operating Procedure (ESOP) “Moisture Intrusion and Microbial Growth Remediation Procedures” were, at least, partially implemented. These activities reportedly included the required air sampling, moisture mapping and loss assessment. Based on the nature of the water source, we understand that the VASDHS determined that this was considered to be a “black water” (not from a sanitary source) intrusion and have proceeded accordingly.

Citadel Environmental conducted an emergency response assessment on August 7 and 8, 2015 which included observations and moisture measurements in the affected areas with subsequent recommendations for remediation. Reports issued by Citadel Environmental were presented to Alta for review. The documents included CITADEL Project No. 5137.1182.0 Limited Moisture Investigation, August 11, 2015 and CITADEL Project No. 5137.1182.0 Limited Moisture Investigation-Follow Up Investigation.

In addition, VASDHS provided Alta with their Standard Operating Procedures for the following:

Asbestos Management Plan (Operation & Maintenance)

HMCA-15-5331revised 100115 (002) Rev.1 October 1, 2015

Water Leak Damage Assessment-Building 1-West Wing – Floors B-1-2-3 & 4

Infection Control Risk Assessment Guidelines – VA San Diego Healthcare System

Interim Life Safety Management (ILSM)

Moisture Intrusion and Microbial Growth Remediation Procedures

The spray applied fireproofing present in the interstitial spaces is an asbestos-containing material (ACM) and wall components have also been identified as containing asbestos and as such intrusive drying efforts (e.g. introduction of super-dried air into walls) were not undertaken to actively dry wall cavities because of the asbestos concerns.

1.2 Scope of Services

HMC requested that Alta review the Moisture Mapping and Assessment information that was collected by

Citadel Environmental and conduct a limited visual inspection of the affected areas. In order to accomplish the requested Scope of Services, Alta conducted a walk-through visual inspection of the affected occupied areas to observe current conditions and test various random building materials for potential residual elevated moisture. Alta also conducted a walk-through inspection of the interstitial spaces in the outlined area impacted by the water intrusion to document obvious signs of damage, water staining or visible indications of delamination (lack of adhesion of the fireproofing material to the substrate to which it was applied) and to determine possible pathways that may have channeled the water into the occupied spaces.

Our site visits were conducted September 8,9,10 and 11, 2015.

The drawings accompanying this report complement our observations and potential responses and should be used in context with this entire document.

2 ANALYTICAL AND FIELD METHODOLOGIES

2.1 Limited Visual Inspections

Alta Environmental used Citadel’s Limited Moisture Investigation, August 11, 2015 and Citadel Project No.

5137.1182.0 Limited Moisture Investigation-Follow Up Investigation to determine areas likely areas to inspect and test for residual elevated moisture.

It should be noted that there was a significant time interval between the initial water intrusion, Citadel’s investigations and moisture mapping, and Alta’s visual inspections; therefore, visible evidence of the water intrusion such as staining may not have been readily apparent and materials initially measured with elevated moisture by Citadel may not have exhibited elevated moisture content at the time of our site visit.

2.2 Tape Source Samples

Tape source samples were collected from the suspect visible mold growth. A direct microscopic examination was made by EmLab/P&K, an accredited laboratory located in Irvine, California.

This analytical method provides a semi-quantitative result. Descriptive terms for semi-quantitative tape-lift results are as follows (from Environmental Microbiology Laboratory publication: Discussion of the Mold

Growth Rating Scale Utilized in Direct Microscopic Examination).

October 1, 2015

Rating Description

<1+ Very light growth of mold found on the tape. (Amount of growth is less than 1+, but still appears to be growth on the surface sampled.)

1+ Light growth of mold found on the tape. (A few spores of one type are found in 10 to 25% of the microscopic fields examined.)

2+ Moderate levels of mold growth found on the tape. (Spores of one type fill 25 to 50% of the microscopic field examined.)

3+ Heavy growth of mold found on the tape. (Spores of one type fill 50 to 70% of the microscopic fields examined.)

4+ Very heavy growth of mold found on the tape. (Spores of one type are nearly confluent in the majority of the microscopic fields examined.)

2.3 Moisture Measurements

Moisture measurements were taken with a Delmhorst Model BD10 moisture meter. Moisture measurements reported as elevated are based on relative measurements from non-impacted materials.

3 ALTA FIELD OBSERVATIONS AND MOISTURE MEASUREMENTS

3.1.1 Basement

Water intrusion occurred into the Basement area from Stair SW-B-1. According to anecdotal information, water from the 4th floor was directed into the stairwells as an emergency control measure. The water flowed into the corridor (B140) resulting in wet building materials throughout the stairwell and corridor walls. Water intrusion also occurred from the interstitial space above, into the Records Management Storage Room

B134, the Kitchen corridor B125B. During Alta’s visual inspection, the following observations were made:

Elevated Moisture in drywall at the ceiling at the south side of the stairwell entrance and east side of corridor B140.

Contaminated carpet remains in Room B140 and assumed mold growth (AMG) was observed at the base of the west and south walls.

Stained ceiling panels in Kitchen Corridor B125B and Office B131.

Visual inspection inside the Sprinkler Manifold Room (B140A) and the Fan Room (B135A) did not reveal obvious signs of water intrusion such as staining. These rooms are in close proximity to the stairwell where the some of the flood water entered the Basement.

Refrigerators B136 and B137 were reported by kitchen staff to Alta as not impacted however water staining above B137 was observed by Alta’s field investigator from within the interstitial space above. Water staining above B135 was also observed from the interstitial space above.

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October 1, 2015

3.1.2 1st Floor

The 1st floor sustained water intrusion across a wider area as compared to the Basement level. During

Alta’s visual inspection, the following observations were made:

Elevated moisture was present on the south wall of General Storage 1228 (the impacted wall in this area is adjacent to a mechanical shaft). Based on this observation it is possible that the mechanical chases may have provided a pathway for water travel from floor to floor through the interstitial space.

Metal casework was installed on the north wall, west end of Room General Storage 1229. Moisture may still be present behind this casework.

Carpet and furnishings remained in Office 1231A. This room was not occupied at the time of our visit and had been isolated.

Based on observations and anecdotal information the Hematology 1220 sustained significant impact throughout the suspended ceiling system.

3.1.3 2nd Floor

The affected area on the 2nd floor appeared to be more extensive. The impact appears to have been more heavily concentrated on the west side of the space with water intrusion occurring to the southeast. Obvious water damage was not observed in the northeast part of the space and this area was apparently not tested by Citadel on either the initial event as reported on August 11th or in the follow-up investigation on the 14th of August. During Alta’s visual inspection, the following observations were made:

Apparent mold growth (AMG) was observed on the north wall, east end under vinyl wall covering and is assumed present under all similar wall coverings in Room 2111.

Significant damage to the ceiling within the Sleep Lab area and hallway was observed

Areas of impact in the interstitial space extended to the hallway to the east of Nurse Station 2072.

An area of the interstitial ceiling space appeared to have been widely impacted by moisture.

3.1.4 3rd Floor

Water intrusion on the 3rd floor was noted on Citadel’s report to have been extensive and apparently concentrated on the west side of the space with little apparent affect in the northeast part of the space.

However, it is our understanding that the Hemodialysis Department which is located in the southeast part of the space was not assessed during their initial site visits of August 7th and 8th or on August 14, 2015.

During Alta’s visual inspection, the following observations were made in the Hemodialysis area that was not previously assessed:

Debris present on top of decorative lighting lenses above Station 3111 and 3112; this was assumed to be asbestos containing debris from the fireproofing directly above-o Water staining in the decorative lighting lenses was observed.

o Some stained ceiling panels around the perimeter of the decorative light above 311 and

3112 were observed. According to employees in this area these ceiling panels had been replaced and the staining occurred subsequent to initial replacement.

Elevated moisture was detected on south wall of the Toilet 3108 and Dirty Utility 3107 rooms.

October 1, 2015

Elevated moisture at the southwest isolation room, Isolation 3110, and adjacent walls (to the north and east) was detected. Elevated moisture was detected at the base of the east wall of Station 14.

AMG was observed at the base of the west wall in office 3096.

Water was reported to have entered Office 3098 from the interstitial space.

VASDHS determined it was necessary to contain dialysis stations 15-18 and the adjacent offices. And, based on this initial observation VASDHS requested a more detailed, intrusive investigation within the

Hemodialysis office areas. Prior to further investigation of these areas, the space was isolated with rigid barriers and a temporary negative air pressure differential relative to the adjacent space was established inside the isolated area. The following conditions were observed during this additional investigation:

AMG in the walls between the offices and contained dialysis stations.

AMG was observed at the SE base of the wall of Station 15-addtionally, elevated moisture was detected in the wall at this location.

Rust on bottom plate and metal studs in the wall cavity between the offices and contained dialysis stations.

Degraded concrete and damaged epoxy coating was observed within the dialysis utility enclosure in areas.

Staining on the toilet wall and soiled utility closet was observed to be present from as observed from Office 3100.

AMG observed within the wall cavity of Office 3096, on the adjacent backer board (associated with the utility chase) and between the baseboard and wallboard.

AMG at the north end of the utility chase/trench inside the isolated area adjacent to Station 18

Wallboard debris and other construction debris was observed in the utility chase/trench north of

Station 18.

AMG, later confirmed to be mold growth was observed to be present at the base of the wall (SE corner) of Exam 3088 which is adjacent to Isolation 3113.

AMG was observed to be present at the base of the north wall of Office 3095.

Surface samples using sticky transparent tape were collected of AMG; the samples were submitted to

EmLab P&K for direct microscopic analysis and the AMG was confirmed as mold growth and not staining resulting from some other source.

The laboratory report and chain-of-custody document are provided as attachments.

3.1.5 4th floor

Water intrusion on the 4th floor was significant with the damage concentrated on the west side but involvement also in the northeast and southwest areas as well. During Alta’s visual inspection, the following observations were made:

Carpet that was wet from the water intrusion was still present in Office 4038; a strong odor was also detected by Alta’s field staff.

Carpet that was wet from the water intrusion was still present in Library 4078 and 4078A.

October 1, 2015

Elevated moisture was detected in Lab 4070C, south wall, east divider wall and north wall

Elevated moisture was detected in Exam Room 4069 west and north walls.

Elevated moisture was detected in Nuclear Medicine Corridor 4076, east wall.

AMG on ceiling panel in Corridor 4500 outside Exam Room 4501.

Staff reported to Alta that in several areas standing water 4 inches deep was present. These areas were reported to be PET Scanner Room 4070 and LAB 4062.

Staff also reported power losses in Rooms 4070C and HAC 4058.

3.1.6 Interstitial Attic Spaces

On September 9, 2015, Alta performed an assessment of the fireproofing and pipe insulation for possible damage as a result of the water intrusion inside the interstitial spaces. Alta was escorted by Juan

Hernandez a VASDMS representative.

The inspection of the interstitial spaces on above floors 3, 2, 1 and Basement was limited to the areas identified in the Water Leak Damage Assessment-West Wing Floors 1-2-3-4 drawing prepared by VA San

Diego Engineering Service. The visual inspection was limited to the observations that could safety be made from the catwalk. Access to the interstitial space was limited to those areas which were accessible via the catwalks.

3.1.7 3rd Floor Interstitial Space

A small section of fireproofing appeared to be deteriorated likely as results of the water intrusion at the west wall of the mechanical room.

Several water stained areas were observed on fireproofing. These areas were located mostly directly below pipe penetrations below restrooms, toilet rooms and shower rooms. It appeared that one of the pathways which the water migrated into the 3rd floor was through the stairs and mechanical room in the north-west corner of the West Wing.

At the mechanical room, evidence of puddling was observed on ductwork and concrete floor as well as the adjacent drywall ceiling where AMG was observed. It appeared that the water overflowed to the south into the catwalk and travelled south and east through the catwalk system. Dried water puddles were also observed throughout the catwalk.

The fireproofing material in this space was mostly encapsulated with a bridging encapsulant.

Accessible areas of fireproofing, mostly at the catwalks, were observed to be intact and in good condition. Existing loose fireproofing debris was observed throughout the space but this debris is not believed to be present as a result of the water intrusion.

At the SW corner, a critical barrier (pony wall) was observed. It appears that the area below is undergoing asbestos abatement or under a containment and was not accessible for inspection.

The assessment was limited to the areas accessible from the catwalk system. No access was available to the center area above the Haemodialysis Department where the decorative light lenses are located; however, debris and evidence of ponded water was observed from below.

Random water stained areas were observed below air handling units where coils are located and the coils were wet.

October 1, 2015

On one air handling unit in the center of the south side, visible water stains and obvious signs of a water leakage were observed.

AMG was observed on the surface of an insulated elbow above room 3039.

3.1.8 2nd Floor Interstitial Space

Several water stained areas were observed on fireproofing and pipe insulation. These areas are located mostly directly below floor pipe penetrations below restrooms, toilet rooms and shower rooms. It appears that the water migrated in to 2nd floor mostly at the NW corner through the stairs and mechanical room.

At the mechanical room, substantial water damage to plaster walls east and north was observed under the lead sheet covering. Dried water puddles were observed on ductwork, and concrete floor in this area. It appears that the water overflowed to the south into the catwalk and travelled south and east through the catwalk system. Dried water puddles were also observed on the catwalks.

The fireproofing in this area is mostly encapsulated with a bridging encapsulant and it appeared to be intact. Fireproofing in accessible areas mostly at the catwalks was observed to be in good condition. Existing loose fireproofing debris was observed in all the space but it is unrelated to the water intrusion.

Water damage and AMG on pipe insulation at various fittings.

3.1.9 1st Floor Interstitial Space

Several water stained areas were observed on fireproofing and pipe insulation. These areas were located mostly directly below pipe penetrations below restrooms, toilet rooms and shower rooms. It appears that the water migrated into 1st floor mostly at the NW corner through the stairs and mechanical room. At the mechanical room, substantial water damage to plaster walls east and north was observed under the lead sheet covering. Dried water puddles were observed on ductwork, and concrete floor in this area. It appeared that the water overflowed to the east and south into the catwalk system. Dried water puddles were also observed on the catwalk mostly throughout the affected area.

The fireproofing in this area is mostly encapsulated with a bridging encapsulant and it appeared to be intact. Accessible areas mostly located at the catwalks were in good condition. Existing loose fireproofing debris was observed throughout the space but it is likely unrelated to the water intrusion.

A water pipe with black foam insulation located south of the mechanical room appears to be wet or covered with condensation.

3.1.10 Basement Floor Interstitial Space

Wet pipe insulation with mold growth present was observed above mechanical room B135.

A small section of fireproofing appeared to be deteriorated and unstable as results of the water intrusion at the west wall above room B135.

In all other areas, several water stained areas were observed on fireproofing. It appeared that the water migrated into the Basement through the stairs.

October 1, 2015

The fireproofing material in this space is mostly encapsulated with a bridging encapsulant. Existing loose fireproofing debris was observed throughout the space but it is not believed to be related to the water intrusion.

Water stains above B137 were observed.

The area to the south, Room B134 was not accessible.

4 REVIEW OF FINDINGS AND DISCUSSION

4.1 Occupied Spaces

The water intrusion occurred on August 7, 2015 with moisture measurements and damage assessments were conducted by Citadel shortly after the initial loss and again a week afterward. Based on a review of

Citadel’s reports, the damage on the 3rd and 4th floors was significant with progressively more limited damage observed on the lower levels. Based on a review of Citadel’s reports, moisture mapping was conducted in the water damaged areas however it is not clear how the east boundary of the affected areas was determined as illustrated on the “Water Damage Assessment” Drawings which we were provided.

In their August 11, 2015 report, Citadel, recommended opening walls for the purpose of water intrusion remediation. These recommendations were apparently based on the extent of elevated moisture detected in the materials tested, e.g. drywall. Subsequent moisture mapping conducted a week later by Citadel indicated that several areas had dried sufficiently and that elevated moisture measurements were not detected. We also note that additional impacted areas were added to the list of impacted areas during the subsequent investigation.

As reported to Alta, the VASDHS determined that this water intrusion was considered a Category 3 or

“Black Water” intrusion. Consistent with the Institute of Inspection, Cleaning and Restoration (IICRC)

Document S520 which defines black water as “water that contains pathogenic agents that could cause disease or death if consumed by humans”. This standard is referenced in the VASDHS Engineering

Standard Operating Procedures (ESOP) for Moisture Intrusion and Microbial Growth Remediation which indicates that porous materials affected by this type of water intrusion must be removed.

It is our understanding that remediation and removal is currently in progress in several impacted areas and that further remediation of the impacted areas is being planned.

The following points require further investigation or understanding:

We were unable to ascertain why certain areas had been excluded from the remediation scope of work as delineated by Citadel; it is possible that these areas were not initially and/or subsequently determined to have been impacted by the water intrusion however, if this is the case, it is unclear to us.

It is our understanding that an initial assessment was not conducted in the 3rd floor Hemodialysis area which is located in the southeast portion of the affected area. At the time of Alta’s limited visual inspection and moisture testing, mold growth was observed inside the wall cavities as well as the outside surface of the drywall in the office spaces on the east side of the area which were adjacent to Dialysis Stations 15-18. Surface samples were collected and mold growth was confirmed by direct microscopic examination conducted by EmLab P&K. Moisture measurements taken at selected areas of the drywall in this area, particularly the offices on the east indicated elevated moisture in the material.

October 1, 2015

Moisture measurements collected by Alta in the affected areas on all floors indicated that some walls still had elevated moisture contents one month after the water intrusion occurred and visible mold growth was observed by Alta in several locations.

4.2 Interstitial Attic Spaces

Signs of water intrusion and ponding were obvious throughout the interstitial space and appeared to extend outward from the north-west corner and in general extend to the south and east. It is likely that the catwalks acted as a conduit for the water.

A small section of fireproofing appeared to be deteriorated as a result of the water intrusion at the west wall of the mechanical room, 3rd floor.

Wet pipe insulation with AMG intrusion was observed above mechanical room B135, Basement.

A small section of fireproofing appeared to be deteriorated and unstable as a result of the water intrusion at the west wall above room B135, Basement.

In all other areas floors 3, 2, 1 and Basement no obviously dislodged, unstable or deteriorated fireproofing and pipe insulation was observed which was likely related to the water intrusion except as noted above. The fireproofing was intact, encapsulated with a bridging encapsulant and in good condition at the catwalk areas.

Loose fireproofing debris was observed in all areas, 3, 2, 1, and Basement and it does not appear as though this debris was related to the water intrusion.

A small amount of mold growth was observed on a pipe elbow insulation on the 3rd floor, it appears to be related to a consistent small water leak, but it does not appear as though this is related to the water intrusion.

Condensate built up on valves, 2nd floor, wet pipe connections at system coils and leaking air handling units on the 3rd floor was observed but it does not appear to be related to the water intrusion.

Signs of water ponding on top of ductwork was observed in multiple locations.

5 CONCLUSIONS AND RECOMMENDATIONS

Our findings are inherently limited because our investigation occurred one month following the initial water intrusion episode. Walls which were initially wetted have likely dried significantly since the initial water intrusion. Although we have noted that many areas remain wet, it is assumed that a significant number of the initially impacted areas have dried; it should be noted that we are unable to determine how quickly the drying process took. Because our data are limited by the temporal distance from the event, we have categorized additional investigation as follows:

Type 1 Remediation: surfaces/areas which were documented as impacted by the water intrusion (this includes all of Citadel’s initial remediation areas and any subsequently added by Alta’s investigation.

Type 2 Investigation: surfaces/areas which were adjacent to areas receiving direct impact should be closely inspected for signs of water intrusion and potential fungal growth. This investigation will require access to interstitial wall cavities for visual inspection to determine if obvious signs of water intrusion or fungal growth are present.

October 1, 2015

Type 3 Investigation: Surfaces/areas which based on observations merit further investigations. In order to make a more conclusive determination if evidence of water intrusion or fungal growth are present. As with the Type 2 Investigation, this investigation must be conducted under isolation with special handling procedures.

The findings of our surface sampling show the presence of fungal growth consistent with significant moisture being present for an extended period of time as evidenced by the presence of Stachybotrys and Chaetomium species. Conversely, we detected fungal growth which is more consistent with surfaces which were wetted and dried more quickly, however not quickly enough such that no fungal growth occurred as evidenced by the presence of Aspergillus and Penicillium species.

Based on the report review, visual inspection, moisture testing and surface sampling conducted by Alta we recommend the following:

1. The VASDHS protocol for intrusion of black water should be fully implemented in the impacted areas using the boundaries indicated by VASDHS in the Water Leak Damage Assessment document.

2. Remediation of each area should be prioritized by patient risk in accordance with the facilities Infection Control practices.

a. It is further recommended that the material removal not be limited by whether or not elevated moisture was detected during initial assessment or the subsequent moisture mapping unless there is documented proof that the material was not impacted. Subsequent moisture measurements conducted by Alta, as expected, indicated that many of the water impacted materials were dry at the time of our investigation however this cannot be used exclusively to eliminate impacted materials from the scope.

b. In areas within the delineated impact areas not directly addressed by the initial findings of Citadel, a modified inspection of those areas may be conducted where one side of a wall cavity is opened for visual inspection and physical testing. We would further recommend that baseboard material be removed on in all potentially impacted areas for inspection. Or, conversely, these areas can be eliminated by documentation, at the time of the initial and follow-up inspections by Citadel, that these areas had not become wet.

3. Special attention should be paid to areas where penetrations from floor-to-floor are present including utility shafts, plumbing, conduits and other potential pathways. We documented areas adjacent to shaft walls which were wet at the time of our investigation that apparently had no other signs of moisture impact.

4. We recommend that wall cavities and ceiling spaces associated with utility or duct chases in the area of impact be opened and inspected at both the floor and ceiling level at the basement level to the third floor and that on the fourth floor walls at the floor level be opened.

5. Mold growth was observed to be present on pipe insulation and fittings in multiple areas and should be addressed.

6. Investigation into the ductwork in areas where ponding was observed to have occurred on ducting is recommended.

October 1, 2015

7. Because the interstitial attic space contains asbestos containing fireproofing, the protocols outlined in the Asbestos Management Plan must be applied. Drywall joint compound found throughout the facility and other materials have been identified as asbestos containing and must be considered in the water intrusion/mold remediation protocol for the impacted areas. It is our understanding that Citadel is completing a comprehensive sampling of the areas to better define the extent of asbestos containing materials.

8. Although a bridging encapsulant was reported to have been applied to the asbestos containing fireproofing it does not appear as though 100% coverage was achieved. It is therefore possible that moisture penetrated the fireproofing.

a. A materials testing firm should be retained to test the physical properties of the fireproofing where water damage was observed in order to document that the fire restiveness properties have not been degraded as a result of the water intrusion.

b. Moisture trapped in the fireproofing may foster fungal growth.

9. Based on conversations with VASDHS and a review of documentation from Citadel it is our understanding that “fogging” or the application of a disinfectant to the ACM fireproofing and other surfaces within the interstitial space, wall cavities and other surfaces is being considered. In Alta’s conversations with VASDHS staff it has been noted and understood by VASDHS that the application of disinfectants instead of removal of impacted materials has significant limitations.

Some literature including that published by the American Conference of Governmental Industrial Hygienists (ACGIH) discourages the use of biocides and IICRC S520–Standard and Reference Guide for Professional Mold Remediation, 1st Ed: 2003, Institute of Inspection, Cleaning and Restoration Certification elaborates on the limitations of the application of biocides. Optimally, removal of impacted surfaces is desired. If the VASDHS determines that the application of biocides will be necessary in special circumstances we encourage the VASDHS to fully investigate and become familiar with the requirements and limitations inherent to the use of biocides.

10. All work related to this water intrusion should be conducted in accordance with The Standard Operating Procedures outlined by the VASDHS for the removal of building materials contaminated with “black water”.

6 ASSUMPTIONS AND LIMITATIONS

It is important to note that Alta’s investigation was conducted one month following the initial water intrusion episode and we cannot account for the dynamic environment which existed within the structure following the water intrusion such as drying efforts, remediation and natural attenuation. Porous surfaces which provide the right nutrients which become wetted have the potential of supporting fungal growth within 24-48 hours after becoming wet.

Although we did find some areas that were still wet some one month plus after the water intrusion, areas that were initially identified as impacted were found to be “dry”. This does not mean, nor can it be assumed, that because the materials had dried within the time span between the initial water intrusion and our limited survey, that mold growth does not exist in the impacted areas.

This report was prepared exclusively for use by HMC Architects, and may not be relied upon by any other person or entity without Alta Environmental’s express written permission. The information, conclusions and recommendations described in this report apply to conditions existing at certain locations when services were performed and are intended only for the specific purposes, locations, time frames and project

October 1, 2015 parameters indicated. Alta Environmental cannot be responsible for the impact of any changes in environmental standards, practices or regulations after performance of services.

In performing our professional services, we have applied present engineering and scientific judgment and used a level of effort consistent with the current standard of practice for similar types of studies.

As applicable, Alta Environmental has relied in good faith upon representations and information furnished by individuals with respect to operations and existing property conditions, to the extent that they have not been contradicted by data obtained from other sources. Accordingly, Alta Environmental accepts no responsibility for any deficiencies, omissions, misrepresentations, or fraudulent acts of persons interviewed.

Alta Environmental will not accept any liability for loss, injury claim, or damage arising directly or indirectly from any use or reliance on this report. Alta Environmental makes no warranty, expressed or implied.

This report is issued with the understanding that the client, the property owner, or its representative is responsible for ensuring that the information, conclusions, and recommendations contained herein are brought to the attention of the appropriate regulatory agencies, as required.

7 DISCLAIMER

Alta Environmental’ investigation and the conclusions and recommendations generated as a result reflect a subjective evaluation of limited data and thus may not be representative of all conditions present at the site.

This investigation was limited to the accessible areas of the work area described. Alta Environmental will not guarantee that all areas of potential fungal contamination were identified during this limited investigation, or that other contaminants are not present and that additional sampling may be required to identify such areas and/or contaminants.

If you have any questions, please feel free to call the undersigned at (562) 495-5777.

8 SIGNATORY

Respectfully submitted by: Reviewed by:

Alta Environmental Alta Environmental

Christine Jordan

Certified Asbestos Consultant

Cal/OSHA Cert. #92-0215

CDPH-Lead in Construction Inspector/Assessor

CDPH-14379

David R. Schack

Vice President, Building Sciences

Certified Asbestos Consultant

Cal/OSHA Cert. #92-0219

CDPH Lead in Construction Inspector/Assessor

CDPH-1104

Attachments: Laboratory Reports, Chain-of-Custody Documents, Photographs and Assessment

Drawings

Attachments

Laboratory Reports, Chain-of-Custody Documents, and Annotated Drawings

Approved by:

Technical Manager Graziella Ines

Report for:

Mr. David Schack Alta Environmental LP 3777 Long Beach Boulevard, Annex Building Long Beach, CA 90807-3335

Regarding: Project: HMCA-15-5531; VA Hospital-San Diego

EML ID: 1422424

All samples were received in acceptable condition unless noted in the Report Comments portion in the body of the report. Due to the nature of the analyses performed, field blank correction of results is not applied. The results relate only to the items tested.

EMLab P&K ("the Company") shall have no liability to the client or the client's customer with respect to decisions or recommendations made, actions taken or courses of conduct implemented by either the client or the client's customer as a result of or based upon the Test Results. In no event shall the Company be liable to the client with respect to the Test Results except for the Company's own willful misconduct or gross negligence nor shall the Company be liable for incidental or consequential damages or lost profits or revenues to the fullest extent such liability may be disclaimed by law, even if the Company has been advised of the possibility of such damages, lost profits or lost revenues. In no event shall the Company's liability with respect to the Test Results exceed the amount paid to the Company by the client therefor.

Dates of Analysis:

Direct microscopic exam (Qualitative): 09-10-2015

Service SOPs: Direct microscopic exam (Qualitative) (EM-MY-S-1039)

EMLab ID: 1422424, Page 1 of 2EMLab P&K, LLC

EMLab P&K 17461 Derian Ave, Suite 100, Irvine, CA 92614

(800) 651-4802 Fax (623) 780-7695 www.emlab.com Client: Alta Environmental LP C/O: Mr. David Schack Re: HMCA-15-5531; VA Hospital-San Diego

Date of Sampling: 09-10-2015 Date of Receipt: 09-10-2015 Date of Report: 09-11-2015

DIRECT MICROSCOPIC EXAMINATION REPORT

Background

Debris and/or Description

Miscellaneous Spores Present*

MOLD GROWTH: Molds seen with underlying mycelial and/or sporulating structures†

Other Comments††

Lab ID-Version‡: 6551624-1, Analysis Date: 09/10/2015: Tape sample 91015-2: SE corner rm 3088

Scant None 3+ Aspergillus species 3+ Penicillium species 3+ Ulocladium species 2+ Chaetomium species

None

Lab ID-Version: 6551625-1, Analysis Date: 09/10/2015: Tape sample 91015-1: SE corner dialysis #15

Light None 3+ Stachybotrys species None

* Indicative of normal conditions, i.e. seen on surfaces everywhere. Includes basidiospores (mushroom spores), myxomycetes, plant pathogens such as ascospores, rusts and smuts, and a mix of saprophytic genera with no particular spore type predominating. Distribution of spore types seen mirrors that usually seen outdoors.

† Quantities of molds seen growing are listed in the MOLD GROWTH column and are graded <1+ to 4+, with 4+ denoting the highest numbers.

†† Some comments may refer to the following: Most surfaces collect a mix of spores which are normally present in the outdoor environment. At times it is possible to note a skewing of the distribution of spore types, and also to note "marker" genera which may indicate indoor mold growth. Marker genera are those spore types which are present normally in very small numbers, but which multiply indoors when conditions are favorable for growth.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is reflected by the value of "x".

The limit of detection is < 1+ when mold growth is detected.

EMLab ID: 1422424, Page 2 of 2EMLab P&K, LLC

Approved by:

Technical Manager Graziella Ines

Report for:

Mr. David Schack Alta Environmental LP 3777 Long Beach Boulevard, Annex Building Long Beach, CA 90807-3335

Regarding: Project: HMCA-15-5531; VA-SD

EML ID: 1422536

All samples were received in acceptable condition unless noted in the Report Comments portion in the body of the report. Due to the nature of the analyses performed, field blank correction of results is not applied. The results relate only to the items tested.

EMLab P&K ("the Company") shall have no liability to the client or the client's customer with respect to decisions or recommendations made, actions taken or courses of conduct implemented by either the client or the client's customer as a result of or based upon the Test Results. In no event shall the Company be liable to the client with respect to the Test Results except for the Company's own willful misconduct or gross negligence nor shall the Company be liable for incidental or consequential damages or lost profits or revenues to the fullest extent such liability may be disclaimed by law, even if the Company has been advised of the possibility of such damages, lost profits or lost revenues. In no event shall the Company's liability with respect to the Test Results exceed the amount paid to the Company by the client therefor.

Dates of Analysis:

Direct microscopic exam (Qualitative): 09-11-2015

Service SOPs: Direct microscopic exam (Qualitative) (EM-MY-S-1039)

EMLab ID: 1422536, Page 1 of 2EMLab P&K, LLC

EMLab P&K 17461 Derian Ave, Suite 100, Irvine, CA 92614

(800) 651-4802 Fax (623) 780-7695 www.emlab.com Client: Alta Environmental LP C/O: Mr. David Schack Re: HMCA-15-5531; VA-SD

Date of Sampling: 09-10-2015 Date of Receipt: 09-11-2015 Date of Report: 09-11-2015

DIRECT MICROSCOPIC EXAMINATION REPORT

Background

Debris and/or Description

Miscellaneous Spores Present*

MOLD GROWTH: Molds seen with underlying mycelial and/or sporulating structures†

Other Comments††

Lab ID-Version‡: 6552155-1, Analysis Date: 09/11/2015: Tape sample 91015T-4: 3095 NW corner

Heavy Few 2+ Stachybotrys species None

Lab ID-Version: 6552156-1, Analysis Date: 09/11/2015: Tape sample 91015T-5: 3096 wall cavity

Light Very few 4+ Aspergillus species None

Lab ID-Version: 6552157-1, Analysis Date: 09/11/2015: Tape sample 91015T-6: 3096 between BB and wall

Light Very few 4+ Stachybotrys species 2+ Chaetomium species

None

Lab ID-Version: 6552158-1, Analysis Date: 09/11/2015: Tape sample 91015T-7: Station 18 diff

Moderate Very few None None

Lab ID-Version: 6552159-1, Analysis Date: 09/11/2015: Tape sample 91015T-8: Station 18 wall cav

Moderate Few 1+ Aspergillus species < 1+ Stachybotrys species

None

Lab ID-Version: 6552160-1, Analysis Date: 09/11/2015: Tape sample 91015T-9: 3100 - south wall

Moderate Very few 3+ Stachybotrys species 1+ Chaetomium species

None

Lab ID-Version: 6552161-1, Analysis Date: 09/11/2015: Tape sample 91015T-10: 3100 - west wall

Moderate Very few 4+ Chaetomium species A few Stachybotrys spores detected.

* Indicative of normal conditions, i.e. seen on surfaces everywhere. Includes basidiospores (mushroom spores), myxomycetes, plant pathogens such as ascospores, rusts and smuts, and a mix of saprophytic genera with no particular spore type predominating. Distribution of spore types seen mirrors that usually seen outdoors.

† Quantities of molds seen growing are listed in the MOLD GROWTH column and are graded <1+ to 4+, with 4+ denoting the highest numbers.

†† Some comments may refer to the following: Most surfaces collect a mix of spores which are normally present in the outdoor environment. At times it is possible to note a skewing of the distribution of spore types, and also to note "marker" genera which may indicate indoor mold growth. Marker genera are those spore types which are present normally in very small numbers, but which multiply indoors when conditions are favorable for growth.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is reflected by the value of "x".

The limit of detection is < 1+ when mold growth is detected.

EMLab ID: 1422536, Page 2 of 2EMLab P&K, LLC

Photographs Page 1 of 5

Photo #3024 AMG at base of wall Room B134

Photo #3025 Debris in light lens above station 3111 and 3112

Photo #3027 Debris present in light lens above station 3111 and 3112

Photo #3037 Utility chase behind stations 15-18

Client: HMC Architects Site: VA San Diego, La Jolla, California Project: Water Leak Damage Assessment-West Wing 4th Floor Project No.: HMCA-15-5331

Photographs Page 2 of 5

Photo #3038 Utility chase behind stations 15-18

Photo #3039 AMG observed in station 15

Photo #3040 Sample 91015-T-1

Photo #3042 Wall construction detail Office 3084

Client: HMC Architects Site: VA San Diego, La Jolla, California

Photographs Page 3 of 5

Photo #3043 Sample 91015-T-2 Exam 3088

Photo #3044 Close up of AMG in Exam 3088

Photo #3050 AMG north wall Office 3095

Photo #3052 Wall damaged and wet adjacent to isolation 3110

Client: HMC Architects Site: VA San Diego, La Jolla, California

Photographs Page 4 of 5

Photo #3055 Office 3096 wall cavity, backer board from adjacent utility chase

Photo #3057 Utility chase

Photo #3060 Growth and debris in utility chase Station 18

Photo #3066 Utility chase south side

Note: Damage to metal studs

Client: HMC Architects Site: VA San Diego, La Jolla, California

Photographs Page 5 of 5

Photo #3067 Wall cavity inside 3100 AMG

Photo #3068 View of interior wall cavity south from 3100

Photo #3069 View of interior wall cavity south east from 3100

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 1 of 8

Photo #154 3rd floor, AC Unit, South Center

Photo #158 3rd floor, AC Unit, South Center

Photo #159 3rd floor, AC Unit, South Center

Photo #163 3rd floor, Catwalk, Dried Puddles

Client: HMC Architects Site: VA San Diego, La Jolla, California Project: Water Leak Damage Assessment-West Wing Floors 1-2-3-4

Interstitial Space Photographs Page 2 of 8

Photo #170 3rd floor, Wet Coils

Photo #171 3rd floor, Wet Coils

Photo #178 3rd floor, Wet Coils

Photo #183 3rd floor, Wet Coils

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 3 of 8

Photo #185 3rd floor, Catwalk, Dried Puddles

Photo #190 3rd floor, Catwalk, Dried Puddles

Photo #196 3rd Floor, Pipe with Mold

Photo #207 3rd floor, Catwalk, Dried Puddles

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 4 of 8

Photo #212 3rd Floor, Stained Fireproofing

Photo #213 3rd Floor, Stained Fireproofing

Photo #214 3rd Floor, Stained Fireproofing

Photo #215 3rd Floor, Deteriorated Fireproofing

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 5 of 8

Photo #219 3rd Floor, Stained Fireproofing

Photo #227 3rd Floor, Stained Fireproofing

Photo #228 3rd Floor, Stained Fireproofing

Photo #232 2nd Floor, Pipe Penetration

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 6 of 8

Photo #237 2nd floor, Stained Fireproofing

Photo #241 2nd Floor, Fitting with Condensate Built up

Photo #245 2nd Floor, Fitting with Condensate Built up

Photo #246 2nd floor, Stained Fireproofing

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 7 of 8

Photo #247 2nd floor, Stained Fireproofing

Photo #259 2nd Floor, Fitting with Condensate Built up

Photo #263 2nd floor, Stained Fireproofing

Photo #288 2nd floor, Mechanical Room

Client: HMC Architects Site: VA San Diego, La Jolla, California

Interstitial Space Photographs Page 8 of 8

Photo #289 1st Floor, Leaking Pipe

Photo #290 1st Floor, Mechanical Room

Photo #295 Basement, Stained Fireproofing

Photo #299 Basement, Wet Pipe with Mold

Client: HMC Architects Site: VA San Diego, La Jolla, California

Type 1 - Remediation:

Surfaces/areas which were documented as impacted by the water intrusion (this includes all of Citadel’s initial remediation areas and any subsequently added by Alta’s investigation

Type 2 - Investigation:Surfaces/areas which were adjacent to areas receiving direct impact should be closely inspected for signs of water intrusion and potential fungal growth. This investigation will require access to interstitial wall cavities for visual inspection to determine if obvious signs of water intrusion or fungal growth are present.

Type 3 - Investigation:

Surfaces/areas which based on observations merit further investigations. In order to make a more conclusive determination if evidence of water intrusion or fungal growth are present. As with the Type 2 Investigation, this investigation must be conducted under isolation with special handling procedures.

AREA OF INSPECTION

EVIDENCE OF

WATER STAINING

ON WALLS &

FIREPROOFING

WET INSULATED PIPE

AND FIREPROOFING,

ABOVE MECHANICAL

ROOM B135

MOLD ON WET

PIPE, ABOVE

MECHANICAL

ROOM B135

NO ACCESS FROM

INTERSTITIAL

SPACE

EVIDENCE OF PUDDLES ON CATWALK,

DUCTS, FLOORS - TYP.

INACCESSIBLE

APPROXIMATE

LOCATION OF VALVES

WITH CONDENSATION

BUILD-UP

AT COLUMNS

Surfaces/areas which were documented as impacted by the water intrusion (this includes all of Citadel’s initial remediation areas and any subsequently added by Alta’s investigation

Type 2 - Investigation:Surfaces/areas which were adjacent to areas receiving direct impact should be closely inspected for signs of water intrusion and potential fungal growth. This investigation will require access to interstitial wall cavities for visual inspection to determine if obvious signs of water intrusion or fungal growth are present.

Type 3 - Investigation:

Surfaces/areas which based on observations merit further investigations. In order to make a more conclusive determination if evidence of water intrusion or fungal growth are present. As with the Type 2 Investigation, this investigation must be

AREA OF INSPECTION

WATER STAINING ON

WALLS &

FIREPROOFING IN

MECHANICAL AREA

ABOVE, ROOM 1230

AND 1229

WATER STAINING ON

FIREPROOFING

ABOVE ROOMS 1220

AND 1220A

WATER STAINING ON

WALLS,EXTERIOR

MECHANICAL AREA

WALSS ABOVE ROOM

MISSING CEILING

PANEL COVERED

W/ PLASTIC

ABOVE ROOM

1120A

EVIDENCE OF PUDDLES ON CATWALK,

DUCTS, FLOORS - TYP.

INACCESSIBLE

APPROXIMATE

LOCATION OF VALVES

WITH CONDENSATION

BUILD-UP

impacted by the water intrusion (this includes all of Citadel’s initial remediation areas and any subsequently added by Alta’s investigation

Type 2 - Investigation:Surfaces/areas which were adjacent to areas receiving direct impact should be closely inspected for signs of water intrusion and potential fungal growth. This investigation will require access to interstitial wall cavities for visual inspection to determine if obvious signs of water intrusion or fungal growth are present.

Type 3 - Investigation:

Surfaces/areas which based on observations merit further investigations. In order to make a more conclusive determination if evidence of water intrusion or fungal growth are present. As with the Type 2 Investigation, this investigation must be conducted under isolation with special handling procedures.

LAURA, PLEASE REHATCH THIS AREA

David.Schack Sticky Note

A/C UNIT WITH LEAKY

CONNECTION &

SWEATY PIPES ABOVE

ROOM 2032, 2034

WATER STAINING ON

WALLS AND

FIREPROOFING

ABOVE THE

GENERAL VACINITY

OF ROOMS 2032,

2034, 2036, 2047, 2050, 2052, 2054, 2056, 2063, 2064, 2068, 2069

MISSING CEILING PANEL

COVERED WTH PLASTIC IN

GENERAL VACINTIY OF

ROOM 2069A

AREA OF INSPECTION

APPROXIMATE

LOCATION OF…