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ARCHIVED REPORTS_XR0002778
EnvironmentalHealth
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3500 - Local Oversight Program
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PR0545262
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ARCHIVED REPORTS_XR0002778
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Last modified
2/3/2020 7:45:11 PM
Creation date
2/3/2020 10:13:46 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0002778
RECORD_ID
PR0545262
PE
3528
FACILITY_ID
FA0009940
FACILITY_NAME
SAN JOAQUIN CATHOLIC CEMETERY
STREET_NUMBER
719
Direction
E
STREET_NAME
HARDING
STREET_TYPE
WAY
City
STOCKTON
Zip
95204
APN
12720002
CURRENT_STATUS
02
SITE_LOCATION
719 E HARDING WAY
P_DISTRICT
001
QC Status
Approved
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SJGOV\sballwahn
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EHD - Public
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From June 1999 through June 2000, ENSR Consultants (ENSR) operated a soil vapor <br /> extraction (SVE) system at the site Initially, ENSR extracted from VW-1D, VW-1S, VW-2S, <br /> VW-3, and VW-4 After several months of operation, air sparging was initiated in MW-1 <br /> According to ENSR, the remediation system removed over 7,000 pounds of gasoline <br /> hydrocarbons from the subsurface In July 2000, ENSR decommissioned the system and <br /> removed the equipment from the site <br /> On November 28, 2000, Ramage Environmental published Environmental Site Investigation <br /> Report documenting the results of a sensitive receptor survey and the drilling of confirmation soil <br /> borings <br /> To confirm the effectiveness of remediation efforts, soil samples were collected every 10 feet to <br /> ' a total depth of 100 feet directly beneath the former USTs The soil sample results indicated <br /> that except for 560 milligrams per kilogram (mg/kg) of Total Petroleum Hydrocarbons (TPH)-as- <br /> gasoline in soil at a depth of approximately 10 feet below ground surface (bgs), the vadose zone <br /> soil was remediated by the SVE system <br /> ' To delineate the vertical extent of impacted groundwater, discrete groundwater samples were <br /> collected with a cone penetration test (CPT) rig at 75, 90, and 125 feet bgs from soil borings <br /> located approximately 20 feet northeast (downgradient) of the former USTs The discrete <br /> groundwater sample results indicated that the vertical extent of impacted groundwater was <br /> mostly delineated Concentrations of MTBE declined significantly with depth and were absent in <br /> the 125-foot groundwater-bearing interval Only 1,2-dichloroethane (1,2-DCA) was detected in <br /> the 125-foot groundwater sample, at a low concentration of 0 5 micrograms per liter (�Igll) <br /> rAccording to available records, three property parcels within 2,000-feet of the site had operating <br /> water wells These properties included the San Joaquin Catholic Cemetery (site), St Joseph's <br /> Hospital, and a residential dwelling at 1821 North Hunter Street The locations of the cemetery <br /> wells and hospital well are shown on Figure 3 <br /> On May 2, 2002, Ramage Environmental published Report, Additional Site Investigation, which <br /> documented the drilling of CPT borings for discrete groundwater sampling at six additional <br /> locations, and the installation of a two-well monitoring well cluster (MW-8A and MW-813) The <br /> results of the project indicated that the extent of MTBE was defined and limited to the <br /> groundwater table northeast(downgradient) of the former UST. Only low concentrations (0 5 to <br /> 1 2 µg11) of 1,2-DCA were detected in the 110 to 125 foot groundwater-bearing interval south and <br /> west of the former UST <br /> 4 <br />
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