HOL-11 Exterior Pipe wrap Lagging (fiber) PLM None detected. HOL-09 Room 10 - Floor Tile, Grey 12x12 PLM None detected

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1 Laboratory results - Asbestos School Sample no. Sample Location Material Sample Type Result Holbrook Elementary HOL-01 Room 12 Floor - Linoleum Tan Linoleum PLM 30% Chrysotile Floor tile PLM None detected Concrete PLM None detected HOL-02 Room 12 Window Upper (CementiouPutty PLM None detected HOL-03 Room 12 Window Lower Putty PLM None detected HOL-04 Room 12 Wall Plaster PLM None detected Skim coat PLM None detected HOL-05 Room 11 - Ceiling 12x12 Tile PLM None detected HOL-06 Room 11 - Window Putty PLM None detected HOL-07 Room 11 - Wall Plaster PLM None detected Skim coat PLM None detected HOL-08 Room 10 - Window Puty PLM None detected HOL-09 Room 10 - Floor Tile, Grey 12x12 PLM None detected Mastic - Yellow PLM None detected Mastic - PLM None detected HOL-11 Exterior Pipe wrap Lagging (fiber) PLM None detected HOL-12 Roof Bldg Shingle PLM None detected Tar PLM None detected HOL-13 Roof Blgd (roof penetration) Tar PLM None detected HOL-14 Bldg Shingle PLM None detected 1 HOL-15 Bldg (roof penetration) Jack Tar PLM 7% Chrysotile Asbestos Containing Materials are highlighted in red (greater than 1%). Asbestos-containing construction material is highlighted in yellow (less than 1%).

2 Laboratory results - Asbestos School Sample no. Sample Location Material Sample Type Result Holbrook HOL-16 K-4 Roof Shingle PLM None detected Paint PLM None detected HOL-17 K-4 Roof Jack Tar PLM 12% Chrysotile HOL-18 Bldg Exterior Stucco PLM None detected Skim Coat PLM None detected HOL-19 Bldg Portico Stucco PLM None detected Skim Coat 1 PLM None detected Skim Coat 2 PLM None detected Skim Coat 3 PLM <1% Chrysotile HOL-20 Multi Use Kitchen Ceiling 12x12 Ceiling Tile PLM None detected HOL-21 Multi Use Kitchen Ceiling HOL-22 Multi Use Kitchen Closet Floor Tile (Older Grey) <1% Chrysotile HOL-23 Multi Use Office Floor Tile (Tan) 4% Chrysotile HOL-24 Multi Use Office Floor Tile (Green) 7% Chrysotile Asbestos Containing Materials are highlighted in red (greater than 1%). Asbestos-containing construction material is highlighted in yellow (less than 1%).

3 Abatement List Project Notes Holbrook Elementary Windows No asbestos containing material detected in window putty. Any roof penetrations that need to be removed shall be assumed to contain asbestos (greater than 1%). Exterior stucco skim coat shall be treated as asbestos containing (less than 1%). Any built-in cabinets shall be assumed to built over asbestos containing floor tile. Exterior paint shall be treated as lead-based paint. Floors Newer grey tile may be assumed not to contain asbestos. All older tile shall be assummed to contain asbestos. Any built-in cabinets that will be removed shall be assumed to be built on top of asbestos containing tile. Bathrooms No asbestos containing material or lead based paint/glaze detected. Multi-use Asbestos containing floor tile in the kitchen, kitchen closet, utility closet, and office. Asbestos containing pipe lagging in the kitchen. * Note - Lead-based paint is on the exterior stucco

4 EMSL Analytical, Inc. 464 McCormick Street San Leandro, CA Tel/Fax: (510) / (510) / sanleandrolab@emsl.com Customer ID: Customer PO: Project ID: Attention: Ed Guzman Phone: (510) Enviro - S.T.A.R., Inc. Fax: (510) Edison Ave Received Date: 0 12:00 PM Suite I Analysis Date: 0 San Leandro, CA Collected Date: 0 Project: MT. DIABLO UNIFIED - HOLBROOK ELEMENTARY, CONCORD Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized Light Microscopy Non-Asbestos Sample Description Appearance % % Non- HOL-01-Linoleum HOL-01-Floor Tile A HOL-01-Mastic B HOL-01-Concrete C HOL HOL HOL-04-Plaster HOL-04-Skim Coat A HOL HOL HOL-07-Plaster HOL-07-Skim Coat A HOL HOL-09-Floor Tile RM 12 - WINDOW, UPPER - PUTTY, CEMENTITIOUS RM 12 - WINDOW, LOWER - PUTTY, SOFT RM 12 - WALL - RM 12 - WALL - RM 11 - CEILING TILE, 12X12 TILE RM 11 - WINDOW - PUTTY (CEMENT) RM 11 - WALL - RM 11 - WALL - RM 10 - WINDOW - PUTTY (CEMENT) RM 10 - FLOOR - TILE, 12X12 GREY Tan Yellow/Clear Non- Non- Non- Non- Non- / Non- Non- Brown/ Non- Non- Non- Non- Non- 3% Synthetic 80% Cellulose 30% Ca Carbonate 20% Matrix 15% Ca Carbonate 25% Gypsum 60% Ca Carbonate 40% Non-fibrous (Other) 27% Non-fibrous (Other) 25% Ca Carbonate 15% Gypsum 20% Ca Carbonate 25% Ca Carbonate 15% Gypsum 20% Ca Carbonate Asbestos % Type 30% Chrysotile Initial report from: 0 18:34:51 ASB_PLM_ Printed: 6:34 PM Page 1 of 3

5 EMSL Analytical, Inc. 464 McCormick Street San Leandro, CA Tel/Fax: (510) / (510) / sanleandrolab@emsl.com Customer ID: Customer PO: Project ID: Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized Light Microscopy Non-Asbestos Sample Description Appearance % % Non- Asbestos % Type HOL-09-Mastic A RM 10 - FLOOR - TILE, 12X12 GREY Yellow Non- HOL-09-Mastic B RM 10 - FLOOR - TILE, 12X12 GREY Non- HOL-10 NOT SUBMITTED Not Submitted HOL BLDG EXTERIOR - PIPE INSULATION, FIBERGLASS Tan 80% Min. Wool 2% Glass 18% Non-fibrous (Other) HOL-12-Shingle / 10% Synthetic 60% Matrix HOL-12-Mastic A Non- HOL-12-Felt B HOL-13-Tar JACK TAR Non- HOL-13-Felt A - JACK TAR HOL-14-Shingle / 10% Ca Carbonate 60% Matrix HOL-14-Mastic A Non- HOL-14-Felt B HOL JACK TAR / Non- 13% Non-fibrous (Other) 7% Chrysotile HOL-16-Shingle K-4 - ROOF - MASTIC/FELT / 60% Matrix HOL-16-Paint A K-4 - ROOF - MASTIC/FELT Silver Non- HOL K-4 - ROOF - JACK TAR / 8% Non-fibrous (Other) 12% Chrysotile HOL-18-Stucco BLDG EXTERIOR - Non- 25% Ca Carbonate 15% Gypsum HOL-18-Skim Coat A BLDG EXTERIOR - Tan Non- 20% Ca Carbonate Initial report from: 0 18:34:51 ASB_PLM_ Printed: 6:34 PM Page 2 of 3

6 EMSL Analytical, Inc. 464 McCormick Street San Leandro, CA Tel/Fax: (510) / (510) / sanleandrolab@emsl.com Customer ID: Customer PO: Project ID: Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized Light Microscopy Non-Asbestos Sample Description Appearance % % Non- HOL-19-Stucco HOL-19-Skim Coat A HOL-19-Skim Coat B HOL-19-Skim Coat C HOL HOL HOL-22-Floor Tile HOL-22-Mastic A HOL-23-Floor Tile HOL-23-Mastic A HOL-24-Floor Tile HOL-24-Mastic A CEILING, TILE 12X12 CEILING - MASTIC CLOSET FLOOR - TILE, OLDER GREY 12X12 CLOSET FLOOR - TILE, OLDER GREY 12X12 FLOOR - TILE, TAN FLOOR - TILE, TAN FLOOR - TILE, GREEN FLOOR - TILE, GREEN Non- Tan/Yellow Non- Non- Tan/Beige Non- Brown/ Brown Non- Non- Non- Brown Non- Non- Non- Non- 90% Cellulose 15% Ca Carbonate 25% Non-fibrous (Other) 60% Ca Carbonate 40% Non-fibrous (Other) 10% Non-fibrous (Other) 26% Non-fibrous (Other) 23% Non-fibrous (Other) Asbestos % Type <1% Chrysotile <1% Chrysotile 4% Chrysotile 7% Chrysotile Analyst(s) Matthew Batongbacal (43) Chris Dojlidko, Laboratory Manager or Other Approved Signatory EMSL maintains liability limited to cost of analysis. This report relates only to the samples reported and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. Interpretation and use of test results are the responsibility of the client. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the federal government. Non-friable organically bound materials present a problem matrix and therefore EMSL recommends gravimetric reduction prior to analysis. Samples received in good condition unless otherwise noted. Estimated accuracy, precision and uncertainty data available upon request. Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample. Reporting limit is 1% Samples analyzed by EMSL Analytical, Inc San Leandro, CA NVLAP Lab Code , WA C884 Initial report from: 0 18:34:51 ASB_PLM_ Printed: 6:34 PM Page 3 of 3

EMSL Analytical, Inc 464 McCormick Street, San Leandro, CA 94577 Phone/Fax: (510) 895-3675 / (510) 895-3680 http://www.emsl.com sanleandrolab@emsl.

7 EMSL Analytical, Inc 464 McCormick Street, San Leandro, CA Phone/Fax: (510) / (510) sanleandrolab@emsl.com CustomerID: CustomerPO: ProjectID: Attn: Ralph Guzman Enviro - S.T.A.R., Inc Edison Ave Suite I San Leandro, CA Phone: (510) Fax: (510) Received: 09/26/16 12:00 PM Collected: Project: MT. DIABLO UNIFIED HOLBROOK ELEMENTARY, CONCORD. Test Report: Lead in Paint Chips by Flame AAS (SW B/7000B)* Client SampleDescription Collected Analyzed RDL Lead Concentration HOL-01PB 0.24 % wt Site: RM 12 WALL HOL-02PB 0.11 % wt Site: RM 12 EXTERIOR TRIM HOL-03PB 0.50 % wt 5.8 % wt Site: RM 12 EXTERIOR WALL HOL-04PB 0.28 % wt Site: RM 11 WALL INTERIOR HOL-05PB % wt Site: BOYS RM WALL TILE (NEAR RM 17) HOL-06PB % wt Site: GIRLS RM WALL TILE (NEAR RM 17) HOL-07PB < Site: GIRLS RM FLOOR TILE (NEAR RM 17) Chris Dojlidko, Laboratory Manager or other approved signatory *Analysis following Lead in Paint by EMSL SOP/Determination of Environmental Lead by FLAA. Reporting limit is based on the minimum sample weight per our SOP. Unless noted, results in this report are not blank corrected. This report relates only to the samples reported above and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities. Samples received in good condition unless otherwise noted. "<" (less than) result signifies that the analyte was not detected at or above the reporting limit. Measurement of uncertainty is available upon request. The QC data associated with the sample results included in this report meet the recovery and precision requirements unless specifically indicated otherwise. Definitions of modifications are available upon request. Samples analyzed by EMSL Analytical, Inc San Leandro, CA A2LA Accredited Environmental Testing Cert # Initial report from 09/27/ :27:26 Test Report PB w/rdl Printed: 9/27/ :27:26 AM Page 1 of 1

BID NO VOLUME III. Date Due: April 18, 2017 at 9:00am

BID NO VOLUME III. Date Due: April 18, 2017 at 9:00am BID NO. 1780 Voluntary Barrier Removal and Restroom Renovations at Various Sites VOLUME III Date Due: April 18, 2017 at 9:00am Enviro-S.T.A.R., Inc. Environmental Safety Training and Resources, Incorporated