Laboratory_Report-111424.pdf

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Attached to
SCWA Water Well Testing
Solicitation number
2025-RFB-0007
Issued by
Sacramento County, San Francisco City, California

About this file

Written by GovTribe AI ·

This document is a Certificate of Analysis from BSK Associates Laboratory Fresno for the Arden Park Vista Well Testing project, which appears to be part of the Sacramento County Water Agency's Water Well Testing Program. The laboratory report documents water sample testing for multiple wells (Tolenas W-2, Fitch W-4, Las Cruces W-5, Los Alamos W-7, Stewart W-8, Latham W-9, Northrop W-22, and La Sierra Park W-35) collected on 11/14/2024. The samples were all ground water grab samples collected by Sean Johnson and analyzed for various chemical and radiological parameters including fluoride, uranium, conductivity, hexavalent chromium, nitrate, nitrite, perchlorate, and 1,2,3-trichloropropane using EPA-approved testing methods.

The laboratory results indicate that most samples showed non-detectable (ND) levels for the tested analytes, with a few exceptions such as uranium levels of 1.3 ug/L in the Fitch W-4 sample and 1.5 ug/L in the Stewart W-8 sample, and a conductivity reading of 420 umhos/cm for the Las Cruces W-5 sample. The testing was performed to ensure compliance with California Domestic Water Quality and Monitoring Regulations and US EPA Potable Water Well Testing Requirements, with each analysis comparing results against primary and secondary Maximum Contaminant Levels (MCLs). The report includes detailed information on the reporting limits, measurement units, batch numbers, and preparation/analysis dates for each tested parameter.

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Certificate of Analysis

SHK0326

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Tolenas W-2 // CA3410002_001_001

Sample ID: SHK0326-01 11/14/2024 - 10:18

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

PIC

AL

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Fitch W-4 // CA3410002_003_003

Sample ID: SHK0326-02 11/14/2024 - 12:15

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

Metals

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Uranium 11/20/24 11/21/24AHK13511.3 1 301.0 ug/LEPA 200.8

Uranium, Radiological 0.89 200.67 pCi/L

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Las Cruces W-5 // CA3410002_004_004

Sample ID: SHK0326-03 11/14/2024 - 12:51

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Conductivity @ 25C 11/22/24 11/22/24AHK1447420 1 9005.0 umhos/cmSM 2510B

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

Hexavalent Chromium 11/22/24 11/23/24AHK15164.2 1 100.050 ug/LEPA 218.7

Perchlorate 11/27/24 11/27/24AHK17071.5 1 61.0 ug/LEPA 314.0

Metals

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Iron 11/20/24 11/26/24AHK1351ND 1 30030 ug/LEPA 200.7

Organics

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

1,2,3-Trichloropropane by GC-MS SIM

1,2,3-Trichloropropane 11/18/24 11/18/24AHK1064ND 1 0.0050.0050 ug/LSRL 524M-TCP

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Los Alamos W-7 // CA3410002_005_005

Sample ID: SHK0326-04 11/14/2024 - 11:25

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

Organics

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

1,2,3-Trichloropropane by GC-MS SIM

1,2,3-Trichloropropane 11/18/24 11/18/24AHK1064ND 1 0.0050.0050 ug/LSRL 524M-TCP

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Stewart W-8 // CA3410002_006_006

Sample ID: SHK0326-05 11/14/2024 - 13:38

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Conductivity @ 25C 11/22/24 11/22/24AHK1447360 1 9005.0 umhos/cmSM 2510B

Fluoride 11/15/24 11/15/24AHK1017ND 1 20.10 mg/LEPA 300.0

Nitrate as N 11/15/24 17:57 11/15/24AHK10173.4 1 100.23 mg/LEPA 300.0

Nitrite as N 11/15/24 17:57 11/15/24AHK1017ND 1 10.050 mg/LEPA 300.0

Perchlorate 11/27/24 11/27/24AHK1707ND 1 61.0 ug/LEPA 314.0

Metals

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Uranium 11/20/24 11/21/24AHK13511.5 1 301.0 ug/LEPA 200.8

Uranium, Radiological 1.0 200.67 pCi/L

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Latham W-9 // CA3410002_007_007

Sample ID: SHK0326-06 11/14/2024 - 09:20

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: Northrop W-22 // CA3410002_013_013

Sample ID: SHK0326-07 11/14/2024 - 08:20

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

Metals

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Uranium 11/20/24 11/21/24AHK1351ND 1 301.0 ug/LEPA 200.8

Uranium, Radiological < 0.67 200.67 pCi/L

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Arden Park Vista Well Testing

Arden Park Vista Well Testing

Sample Description: La Sierra Park W-35 // CA3410002_014_014

Sample ID: SHK0326-08 11/14/2024 - 11:02

Sampled By:

Grab

Sean Johnson Ground Water

Sample Date - Time:

Matrix:

Sample Type:

BSK Associates Laboratory Fresno

General Chemistry

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Fluoride 11/16/24 11/16/24AHK1028ND 1 20.10 mg/LEPA 300.0

Metals

ResultAnalyte RL Prepared Analyzed

RL

MultUnitsMethod Batch Qual

1°

MCL

2°

MCL

Uranium 11/20/24 11/21/24AHK1351ND 1 301.0 ug/LEPA 200.8

Uranium, Radiological < 0.67 200.67 pCi/L

SHK0326 FINAL 01082025 1538

www.BSKAssociates.com

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

TY

Laboratory Report-111424.pdf

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