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ARCHIVED REPORTS XR0011303
EnvironmentalHealth
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DURHAM FERRY
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3500 - Local Oversight Program
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PR0544624
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ARCHIVED REPORTS XR0011303
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Entry Properties
Last modified
7/3/2019 7:06:04 PM
Creation date
7/3/2019 3:49:51 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0011303
RECORD_ID
PR0544624
PE
3526
FACILITY_ID
FA0005206
FACILITY_NAME
GEORGES SERVICE
STREET_NUMBER
1600
Direction
W
STREET_NAME
DURHAM FERRY
STREET_TYPE
RD
City
TRACY
Zip
95376
APN
25510004
CURRENT_STATUS
02
SITE_LOCATION
1600 W DURHAM FERRY RD
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
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EHD - Public
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Geo4wafTechnscs 2= Page 2 <br /> Groundwater Monitoring Report <br /> Project No 281 2 <br /> December 18, 1996 <br />' from a low of 88 14 feet above mean sea level (MSL) in March 1996 up to 91 13 feet above <br /> MSL in July 1996 This represents about a 3 foot change in the elevation of the water table <br /> Table 1 of Appendix A summarizes the groundwater level measurements to date <br /> Groundwater gradient calculations show that the dominant groundwater flow is in a northern <br /> direction with the slope ranging from 0 0017 up to 0 0289 ft/ft <br /> 1.2 ]Groundwater Sampling Procedure <br /> On September 11, 1996, Del-Tech Geotechnical Support personnel arrived on-site, opened <br /> the well, and measured the depth to water with an electrically actuated sounding tape The <br /> water level reading was recorded to an accuracy of 0 01 foot In wells where free floating <br /> product was suspected, a clear disposable bailer is used to gauge the interface <br /> Stagnant water in the well casing was purged using either a Grundfos pump or electronic <br /> bailer as recorded in the field logs (Appendix Q The rate of well purging was monitored <br /> The well was purged of at least three casing volumes and until the groundwater parameters <br /> (temperature, conductivity, and pH) had stabilized (Appendix Q indicating that water, <br /> representative of actual aquifer conditions, was entering the well Groundwater parameter <br /> stabilization was characterized by three successive readings within 10% In this case the <br /> instrument was not calibrating properly, and pH measurements were not considered reliable <br /> Before a sample was collected, the well's water level was allowed to recharge to at least 80% <br /> of it's initial level All water removed from the monitoring well and not used as a sample, <br /> was placed in a 55 gallon DOT (Department of Transportation 17-H) approved container that <br /> is properly labeled and temporally stored on-site <br /> A bailer was used to collect each sample Bailer cleanliness was assured by collecting a <br /> bailer blank (pouring distilled water through the bailer and collecting it in a VOA vial) prior <br /> to collecting the analytical sample <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 using a bottom emptying device which minimizes sample <br /> aeration during transfer of the sample All samples were checked for head space bubbles, <br /> labeled, inserted into foam holders and placed in an ice chest cooled to 4°C for transport to <br /> the laboratory <br /> Disposable gloves were worn by the sampling technician while collecting all samples <br />
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