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ARCHIVED REPORTS XR0009835
EnvironmentalHealth
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3500 - Local Oversight Program
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PR0544710
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ARCHIVED REPORTS XR0009835
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Last modified
7/30/2019 1:40:22 PM
Creation date
7/30/2019 1:09:37 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0009835
RECORD_ID
PR0544710
PE
3528
FACILITY_ID
FA0006247
FACILITY_NAME
Western Lift
STREET_NUMBER
3430
Direction
S
STREET_NAME
EL DORADO
STREET_TYPE
ST
City
STOCKTON
Zip
95206
APN
17525063
CURRENT_STATUS
02
SITE_LOCATION
3430 S EL DORADO ST
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
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EHD - Public
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' Bank of Stockton Cutter Lumber Site Page 3 <br /> Quarterly Groundwater Monitoring Report <br /> Project No 102 2 <br /> February 25,2003 <br />' <br /> 2.0 GROUNDWATER MONITORING <br />' The following sections describe the procedures associated with the completion of <br /> groundwater monitoring at the site along with documenting the disposal of the <br />' well purge water associated with groundwater monitoring activity <br /> 2 1 Groundwater Sample Collection <br /> 1 On December 20, 2002, Del-Tech Geotechnical Services of Oakdale, CA <br /> mobilized to the site to complete groundwater monitoring The groundwater <br />' monitoring procedure was as follows Upon arrival, each well was opened and <br /> the water level allowed to equilibrate As each well was opened, and prior to <br /> taking the depth to groundwater measurement, a PID organic vapor meter was <br />' used to screen for VOC's in the head space of the well The depth to <br /> groundwater was then measured by lowering an electronically actuated air / <br />' water interface detector suspended from a polyethylene measuring tape <br /> calibrated to the nearest 0 01 foot (see groundwater monitoring data sheets in <br /> Appendix B) A careful notation made of the depth to groundwater as measured <br />' by the device No measurable free product was observed in the wells <br /> Each well was pumped with a Wattera pump and dedicated vinyl tubing lowered <br />' to bottom Well water was containerized in 55-gallon DOT approved <br /> polyethylene drums, properly labeled, and temporarily stored on-site The rate <br /> of well purging was monitored, and each well was purged of at least three casing <br />' volumes or until the groundwater parameters (temperature, conductivity, and <br /> pH) had stabilized indicating that water representative of actual aquifer <br /> conditions was entering the well Groundwater parameter stabilization was <br />' characterized by three successive readings within 10 percent After the wells had <br /> been allowed to recharge to at least 80 percent of their original volume, samples <br /> were collected from them using methods described below <br /> 1 <br /> After purging was completed, the Wattera pump was used to produce a water <br />' sample directly into the sample containers Before and in between uses, all <br /> sampling equipment was washed using a portable steam cleaner Disposable <br /> gloves were worn by the sampling technician while collecting all samples The <br />' gloves were changed between the collection of each sample to reduce the <br /> potential for cross-contamination <br /> l <br /> Extreme care was exercised while collecting samples to prevent agitation of the <br /> ie water while filling the sample containers Water samples were transferred from <br /> the bailer into 40 ml VOA vials preserved with hydrochloric acid (provided by <br />' 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0293 <br /> 1 <br />
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