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ARCHIVED REPORTS_XR0012193
Environmental Health - Public
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3500 - Local Oversight Program
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PR0545890
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ARCHIVED REPORTS_XR0012193
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Last modified
7/22/2020 12:09:52 PM
Creation date
7/22/2020 11:32:06 AM
Metadata
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Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0012193
RECORD_ID
PR0545890
PE
3526
FACILITY_ID
FA0025958
FACILITY_NAME
ROEK BROTHERS CONSTRUCTION
STREET_NUMBER
102
Direction
S
STREET_NAME
WILSON
STREET_TYPE
WAY
City
STOCKTON
Zip
95205
APN
15502065
CURRENT_STATUS
02
SITE_LOCATION
102 S WILSON WAY
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
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1 <br /> f Quality Assurance/Quality Control Plan Page 6 <br /> 8.0 LABORATORY QA/QC PLAN <br /> Soil and groundwater samples will be submitted to a State Certified Hazardous Waste Laboratory <br /> for chemical analysis of hazardous constituents, Established QA/QC procedures for analytical <br /> operations will include sample custody procedures, standards of analytical accuracy, analysis of <br /> I <br /> matrix spikes and method data, and maintenance of control charts to monitor analytical <br /> performance These QA/QC procedures are outlined in the laboratory QA/QC Plan which is <br /> available upon request Organic chemical analyses will be performed in conformance with <br /> standard procedures established by the United States Environmental Protection Agency (EPA) <br /> I in "Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean <br /> F Water Act" (40 CFR Part 136, October 1984) The laboratory is periodically evaluated through <br /> external performance audits conducted by EPA and DHS using QC labs The specific analytical <br /> methods to be utilized for purgeable and semivolatile hydrocarbons analyses are shown on Table <br /> 2 <br /> 9.0 GROUNDWATER MONITORING PROTOCOL <br /> Monitoring of depth to water and free phase LNAPL(light non-aqueous phase liquids) thickness <br /> within wells will be conducted using an interface probe or conductivity meter. For <br /> t consistency, all measurements will be taken from the north side of the wellhead at the survey <br /> mark To assess potential infiltration of fine grained sediments, total well depth will also be <br /> sounded <br /> I <br /> � I <br /> Thickness of LNAPL on the groundwater surface is calculated by subtracting the depth to <br /> product from the depth to water In addition, water elevations are adjusted for the presence of <br /> k fuel with the following calculation <br /> i (LNAPL Thickness) (specific gravity) + (Water Elevation) = Corrected Water Elevation <br /> M <br /> Newly installed wells will be allowed to stabilize for 24 hours after development prior to free <br />` phase thickness determination <br /> r � <br />
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