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ARCHIVED REPORTS XR0001843
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3500 - Local Oversight Program
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PR0544430
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ARCHIVED REPORTS XR0001843
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Last modified
5/7/2019 2:28:07 PM
Creation date
5/7/2019 2:22:55 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0001843
RECORD_ID
PR0544430
PE
3526
FACILITY_ID
FA0005370
FACILITY_NAME
PARMAR TEXACO
STREET_NUMBER
521
Direction
N
STREET_NAME
CHEROKEE
STREET_TYPE
LN
City
LODI
Zip
95240
CURRENT_STATUS
02
SITE_LOCATION
521 N CHEROKEE LN
P_LOCATION
02
P_DISTRICT
004
QC Status
Approved
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EHD - Public
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' 3.0 GROUNDWATER MONITORING AND SAMPLING <br /> 34 Field Groundwater Monitoring and Sampling <br /> Groundwater monitoring wells for the former Parmar Texaco site(PT-MW I to 6)were probed <br /> for water depth on June 9, 2005 The six wells were probed for depth to groundwater surface, <br />' presence of free-floating product, and depth to bottom of well The wells were sampled in <br /> accordance with the PHSEHD approved site characterization workplan(Muir, 2003)using <br /> groundwater monitoring procedures outlined in Appendix 1 <br /> The wells were initially inspected for integrity and general maintenance conditions with the <br /> findings reported on the Well Development/Purging Worksheets provided in Appendix 2 <br /> Initially,the static water level was measured with an electronic water level indicator that allowed <br /> measurement of depth to approximately 0 01 foot The water level below casmg and total depth <br />' of each well monitored were recorded on individual Well Development/Purging Worksheets <br /> (Appendix 2) The groundwater surface elevation was then calculated in feet, mean sea level <br /> along with total volumes to be removed prior to well sampling <br />' A clear,acrylic bailer was then used to visually inspect an undisturbed sample from the top of <br /> the water column to determine if a product layer or sheen was present A slight but pronounced <br /> sheen and product layer was visible on the tape and bailers used to sample monitoring wells PT- <br /> MW I, 2 and 3 These wells had a slight, free-product layer on top of the groundwater surface <br /> approximately 0 005 foot thick No product layer or sheen was visible in the bailers used for the <br /> other monitoring wells <br /> A minimum of three well casing volumes were extracted from each monitoring well using a <br /> Teflon bailer and/or submersible 1 5" diameter pump This allowed a representative <br />' groundwater sample to flow from the reservoir area surrounding each wellbore into the wellbore <br /> This effort is consistent with groundwater monitoring well sampling guidelines established by <br /> the RWQCB for petroleum hydrocarbon site investigations <br /> Field parameters (pH, temperature and electrical conductivity(Ec))were measured and recorded <br /> on individual well field worksheets during the water purged from each monitoring well Results <br /> are summarized on the attached Tables 1 and 2 Purged water was placed into a 55-gallon drum <br /> onsite that had been labeled as non-hazardous <br /> Groundwater samples were collected using a disposable Teflon bailer and placed into 40 ml <br /> VOA sample containers that had been prepared with a dilute HCl solution for sample <br /> preservation and labeled The water samples were handled and transported under accepted <br /> chain of custody procedures outlined in the workplan to Kiff Analytical Laboratories, Davis, <br /> California After sampling activities were concluded each of the wells were then secured <br /> IAll sampling equipment was decontaminated by Alqumox and a followup distilled water rinse <br /> M=\DlEnwanmwt"an=T=woWcports\QMR063005 4 <br />
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