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2900 - Site Mitigation Program
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PR0542459
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Last modified
6/11/2021 10:48:47 AM
Creation date
6/11/2021 10:12:42 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
WORK PLANS
RECORD_ID
PR0542459
PE
2965
FACILITY_ID
FA0024400
FACILITY_NAME
CAARNG STOCKTON FMS #24
STREET_NUMBER
8010
Direction
S
STREET_NAME
AIRPORT
STREET_TYPE
WAY
City
STOCKTON
Zip
95206
APN
17726004
CURRENT_STATUS
01
SITE_LOCATION
8010 S AIRPORT WAY
P_LOCATION
01
QC Status
Approved
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SJGOV\dsedra
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EHD - Public
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S ecific Comments: <br />Item Section Page Comment Response <br />I General - CA ARNG needs to define the extent of the copper sulfate <br />contamination left in-place and assess potential receptors <br />and exposure pathways before Regional Water Board staff <br />can consider concurring on no further action. At a <br />minimum, institutional controls (ICs) will be required if <br />CA ARNG chooses to leave the contamination in-place. A <br />State land use covenant may be required to implement the <br />ICs. The Draft Addendum should be revised to collect the <br />necessary data to delineate the extent of the copper sulfate <br />contamination and buried airplane parts and fully assess the <br />risks (including threat to water quality) posed by the <br />residual contamination. <br />The CA ARNG has not determined the future action for the <br />copper sulfate site at this time, and has not identified <br />funding for the project. CA ARNG options are to either <br />remove it or leave it in place, which requires <br />characterization and a health risk assessment. However, <br />CA ARNG has no allocated funds for this work, and may <br />not be able to acquire funds until 2008/2009. We therefore <br />propose to provide a work plan addendum specific to the <br />copper sulfate issue at a future date, based on identification <br />of funding for the project. <br />2 General Soil samples collected during the investigation and <br />removal actions at the potential tear gas canister and <br />copper sulfate disposal area have elevated concentrations <br />of some metals. In particular, arsenic exceeds the US EPA <br />The Draft Addendum will be revised to include <br />background sampling for arsenic (with proposed locations <br />as determined during the March 27, 2007 Site walk). <br />Preliminary Remediation Goal for Industrial Soil in every <br />sample. Regional Water Board staff agrees that the <br />elevated concentrations of arsenic may fall within the range <br />of local background, but CA ARNG needs to support this <br />conclusion by assessing local background concentrations of <br />arsenic. Revise the Draft Addendum to include <br />background sampling and analysis for arsenic. The Final <br />Addendum should include a figure showing the proposed <br />locations of background samples. <br />FOR OFFICIAL USE ONLY <br />28 March 2007 <br />Page 2 of 4
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