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3500 - Local Oversight Program
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PR0545728
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Last modified
6/4/2020 11:54:13 AM
Creation date
6/4/2020 11:40:03 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
WORK PLANS
RECORD_ID
PR0545728
PE
3528
FACILITY_ID
FA0006203
FACILITY_NAME
WALTS AUTO REPAIR
STREET_NUMBER
9172
STREET_NAME
THORNTON
STREET_TYPE
RD
City
STOCKTON
Zip
95209
CURRENT_STATUS
02
SITE_LOCATION
9172 THORNTON RD
QC Status
Approved
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EHD - Public
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l <br /> RFSNA Industries Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised November 1993 <br /> Provided the database is of sufficient size, statistical techniques may be employed for data <br /> validation. <br /> 9.0 GROUNDWATER MONITORING PROTOCOL <br /> Monitoring of depth to water and free product thickness within wells at the site will be <br /> conducted using an Interface Probe or Conductivity Meter. For consistency, all measurements <br /> will be taken from the north side of the wellhead at the survey mark. To assess potential <br /> infiltration of fine-grained sediments, total well depth will also be sounded. <br /> Product thickness is calculated by subtracting the depth to product from the depth to water. In <br /> addition, water elevations are adjusted for the presence of fuel with the following calculation: <br /> (Product Thickness) (.8) + (Water Elevation) = Corrected Water Elevation <br /> NOTE: The factor of 0.8 accounts for the density difference between water and petroleum <br /> hydrocarbons. <br /> Newly installed wells will be allowed to stabilize for 24 hours after development prior to free <br /> product inspection. <br /> An acrylic Surface Sampler will be used for visual inspection of the groundwater in order to note <br /> - sheens (difficult to detect with the Interface Probe), odors, microbial action and sediments. The <br /> sampler is calibrated in inches and centimeters for visual inspection of product thickness. <br /> QAQC1M.FM 7 <br />
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