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ARCHIVED REPORTS XR0009840
EnvironmentalHealth
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EL DORADO
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3500 - Local Oversight Program
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PR0544710
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ARCHIVED REPORTS XR0009840
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Last modified
7/30/2019 1:50:53 PM
Creation date
7/30/2019 1:10:54 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0009840
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 /> • April 11,2001 <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 well purge <br /> water associated with groundwater monitoring activity <br />' 2.1 Groundwater Sample Collection <br /> On March 12, 2001, Del-Tech Geotechnical. Services of Oakdale, CA mobilized to the site to <br /> complete groundwater monitoring The groundwater monitoring procedure was as follows <br /> Upon arrival, each well was opened and the water level allowed to equilibrate As each well <br />' was opened, and prior to taking the depth to groundwater measurement, a PID organic vapor <br /> meter was used to screen for VOC's in the head space of the well The depth to groundwater <br /> was then measured by lowering an electronically actuated air / water interface detector <br />' suspended from a polyethylene measuring tape calibrated to the nearest 0 01 foot (see <br /> groundwater monitoring data sheets in Appendix B) A careful notation made of the depth to <br /> groundwater as measured by the device No measurable free product was observed in the <br />' wells <br /> Each well was pumped with a dedicated Wattera pump or by inserting a submersible pump <br /> Iinto the well and lowering it to bottom Well water was containerized in 55-gallon DOT <br /> approved polyethylene drums, properly labeled, and temporarily stored on-site The rate of <br /> well purging was monitored, and each well was purged of at least three casing volumes or <br /> Iuntil the groundwater parameters (temperature, conductivity, and pH) had stabilized <br /> indicating that water representative of actual aquifer conditions was entering the well <br /> Groundwater parameter stabilization was characterized by three successive readings within <br /> 10 percent After the wells had been allowed to recharge to at least 80 percent of their <br /> original volume, samples were collected from them using methods described below <br />' A stainless steel bailer belayed on a clean stainless steel line was used to collect each sample <br /> Bailer cleanliness was verified by collecting a bailer blank (pouring distilled water through <br /> the bailer and collecting it in a VOA vial) prior to collecting the analytical sample Before <br /> and in between uses, all sampling equipment was washed using a portable steam cleaner <br /> Disposable 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 potential for cross- <br /> contamination <br /> Extreme care was exercised while collecting samples to prevent agitation of the water <br /> contained in the bailer Water samples were transferred from the bailer into 40 ml VOA vials <br /> preserved with hydrochloric acid (provided by the analytical laboratory) All samples were <br /> checked for head space bubbles, labeled, inserted into foam holders and placed in an ice chest <br /> • cooled to 4°C for transport to the laboratory <br /> 2937 Veneman Ave,OB240 Geo-Phase Environmental Inc Phone(209)569-0293 <br /> Modesto,CA 95356 Fax(209)569-0293 <br />
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