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3500 - Local Oversight Program
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PR0545189
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Last modified
1/16/2020 1:26:12 PM
Creation date
1/16/2020 12:08:12 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
WORK PLANS
RECORD_ID
PR0545189
PE
3528
FACILITY_ID
FA0005174
FACILITY_NAME
SUSD-FRANKLIN HIGH SCHOOL
STREET_NUMBER
300
Direction
N
STREET_NAME
GERTRUDE
STREET_TYPE
AVE
City
STOCKTON
Zip
95205
APN
14331006
CURRENT_STATUS
02
SITE_LOCATION
300 N GERTRUDE AVE
P_LOCATION
99
P_DISTRICT
002
QC Status
Approved
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�I/ 114 <br /> ATC Associates Inc. <br /> Quality AssuranmQoality Control Plan <br /> Revised March 1998 <br /> deionized water. this procedure will be carried out on-site before sampling of other monitoring wells,if <br /> more than one well is to be sampled with the sample sampling device. <br /> Immediately prior to sampling, the depth to water(DTV) in the well will be recorded. The thickness <br /> of product on top of the groundwater, if present, will be measured using an interface probe. The <br /> procedure for monitoring is presented in Section 9.0(Groundwater Monitoring Protocol). <br /> if free product is detected, analysis of groundwater at the interface for dissolved product will not be <br /> conducted. A product sample will be collected for source identification. If all free product cannot be <br /> removed, an interval specific sampling device may be utilized to collect a sample from below the zone <br /> of free product. Before collecting groundwater samples from each well, the well will be purged until <br /> indicator parameters (temperature, conductivity, and pI-1) stabilize. This will entail the removal of at <br /> least four well casing volumes by bailing or pumping. The criteria for determining well casing volumes <br /> and temporary storage of purged water is outlined in Section 10.0(Well Development Protocol). The <br /> indicator parameter measurements will be taken both before and after purging of each well casing <br /> volumes. Once the well is purged and indicator parameters have stabilized, a sample will be collected <br /> after the water level approaches 80 percent of its initial elevation. Where water level recovery is slow, <br /> the sample will be collected after stabilization is achieved and enough water is present to fill sample <br /> containers. <br /> Cross contamination from transferring pumps(or bailers)from well to well will be avoided by utilizing <br /> dedicated equipment. Where this is not feasible, thorough cleaning of equipment will be performed <br /> between sampling rounds. Sampling will proceed from the least contaminated to the most <br /> contaminated well, if information is available before sample collection, or if it is indicated by field <br /> w:)Admin \QAQC-98.noC <br />
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