Attachment A Bid 26-2969-DP.PDF

L Street Backflow Preventer Project

BID #26-2969-DP

Attachment A

Supporting Documentation

Table Of Contents

Backflow Project Site Map Pages 2-4

GIS Site Map 660 L Street, Chula Vista Page 5

FPU-1&2-Optimized Example Pages 6-7

Backflow Cut Sheet SASD_15-A Pages 8-9

Backflow Cut Sheet SASD_15-C Page 10

Backflow 1-Service Number 26916 Pages 11-13

Backflow 1-Service Number 27480 Page 14

Backflow 3-Service Number 29561 Page 15

Backflow 3-Service Number 29698 Page 16

Backflow #1:

650 L Street, CV Backflow #2:

670 L Street, CV

Backflow #3:

642 Arizona Street, CV

Existing (FACP)

Fire Alarm Control Panel

Existing (FACP)

Fire Alarm Control Panel

Backflow #1:

650 L Street, CV

Backflow #2:

670 L Street, CV

Backflow #3:

642 Arizona Street, CV

Backflow Retrofit - SUHSD, 660 L Street, CV

SanGIS using legal recorded data provided by the County Recorders and Assessor's Office. See the County ARCC website at https://

Service Area Boundary

Customer Meters

Air Valves

Air Valve - no info

Air Valve, In Service (Per Existing GIS); Air Valve, In Service (Per Record Drawing)

Air Valve, Initial Design

Blowoff Valves

<all other values>

In Service

Initial Design

7/7/2025, 7:50:21 AM

0 0.03 0.060.01 mi

0 0.05 0.10.03 km

1:2,257

Web AppBuilder for ArcGIS

This map was developed by Sweetwater Authority for internal illustration only. It is not designed to provide technical detail, and should not be used for any other purpose without the express written permission of Sweetwater Authority.

fmontijo Text Box The contractor shall call for Authority Inspection 48-hours in advance of work for backflow placement.

fmontijo

EXAMPLE - EXAMPLE - EXAMPLE - EXAMPLE - EXAMPLE

fmontijo

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1 Authority approved backflow

I prevention device (RPDA shown)

If Fire Service, a i" -2" water meter shall be set by SWA

Sweetwater Authority ~ Privately

Maintained I Maintained

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When using RP assembly, provide 6.0" 4' wide, by 4" thick concrete slab reinforced with #4 rebar, 12" O.C.

each way

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Max. 3.0' or as .»"

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Undisturbed soil

NOTES:

approved by Authority

(see Note 3)

Concrete thrust blocks per Std. Dwg. 11

PROFILE

Not to scale

1. Backflow preventers shall not be installed below ground or in vault.

Size H (in)

2-1/2" - 4" 24

6" - 10" 30

H

B

2. The installation of backflow prevention assemblies, using only Authority approved backflow preventers, will be subject to inspection. Contact the Authority's Cross-Connection Department for approved device types and location requirements.

CONTINUE NOTES - SEE SHEET 2 OF 2:

SWEETWATER AUTHORITY BACKFLOW PREVENTER

___ RE_V_I S_I O_N_S_-+-D_R_A W_N_B_Y:_JD_M_-l :"VE~-~t/ A / ASSEMBLY (SHT. 1 OF 2)

NO. 3 DATE: 09-23-04 ~~

DATE: 12-10-20 SCALE: NONE STANDARD DRAWING15-A

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SEE NOTES - SEE SHEET 1 OF 2:

3. Backfill with 2-sack cement slurry may be required when backflow preventer placement is greater than 3 feet from property line or edge of easement.

4. Sweetwater Authority to install and maintain detector meter.

5. Owner is required to maintain and repair the backflow preventer assembly.

6. Owner is responsible to have the device tested upon installation and thereafter annually by a certified tester, with an original copy of the test results sent to the Authority.

7. The privately maintained portion of the assembly (between A and B) shall be designed by the Project

Engineer (Registered Civil Engineer) and submitted on the project Plans, as applicable. Std. Dwg. 15-C may be used in lieu of submitting design.

8.

9.

10.

All installations shall comply with the latest edition of the California Plumbing Code.

When soil between the thrust blocks has been disturbed, both thrust blocks shall be joined through a single monolithic concrete pour. See Std. Dwg.15-C for alternate installation.

Connection to service lateral shall provide for the minimum required length of restrained or uncut piping for a fully restrained connection. Minimum restraint lengths shall be as listed below. See Std. Dwg. 15-C for alternate installation.

Min. Restrained Size (in) Length (ft)

:5 4 10

6 15

8 20

10 22

12 26

SWEETWATER AUTHORITY

REVISIONS DRAWN BY:JDM

BACKFLOW PREVENTER

~ ASSEMBLY (SHT. 2 OF 2)

NO.3 DATE: 09-23-04

DA TE: 12-10-20 SCALE: NONE · ~ STANDARD DRAWING15-A