My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
ARCHIVED REPORTS_XR0012223
EnvironmentalHealth
>
EHD Program Facility Records by Street Name
>
W
>
WILSON
>
102
>
3500 - Local Oversight Program
>
PR0545890
>
ARCHIVED REPORTS_XR0012223
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/22/2020 12:20:08 PM
Creation date
7/22/2020 11:48:02 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0012223
RECORD_ID
PR0545890
PE
3526
FACILITY_ID
FA0025958
FACILITY_NAME
ROEK BROTHERS CONSTRUCTION
STREET_NUMBER
102
Direction
S
STREET_NAME
WILSON
STREET_TYPE
WAY
City
STOCKTON
Zip
95205
APN
15502065
CURRENT_STATUS
02
SITE_LOCATION
102 S WILSON WAY
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
Scanner
LSauers
Tags
EHD - Public
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
126
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
Mr. Nuel Henderson <br /> Page 3 of 4 <br /> . EDB was not detected in any of the wells sampled. 1,2-DCA was detected in wells MW8, MW 11, <br /> MW 12, MW 15A, MW 15B and MW 15C. Detected concentrations of 1,2-DCA ranged from 1.0 <br /> ppb in MW8 to 18 ppb in MW 12. Analytical results for gasoline oxygenates, EDB and 1,2-DCA <br /> are summarized in Table 3. Attachment B contains laboratory reports and chain of custody <br /> documentation. <br /> Vapor Extraction Wells <br /> Vapor extraction wells VW1 through VW6 were not sampled during the quarter. <br /> GROUNDWATER SAMPLING SUMMARY AND DISCUSSION <br /> • Water levels rose during this quarter. Groundwater elevation data continue to show a <br /> predominantly easterly-northeasterly groundwater flow direction. An upward vertical gradient <br /> component was observed across the site. <br /> + Petroleum hydrocarbon concentrations in the wells affected by the onsite release were within <br /> historical ranges. The extent of groundwater contamination associated with the onsite release is <br /> stable and contaminant concentrations are stable to decreasing. <br /> • The plume of contamination originating from offsite source(s) is continuing to spread. High <br /> levels of MTBE persist in wells along the southern portion of the property. MTBE has also <br /> affected downgradient wells MW11 and MW15B where the concentrations detected during this <br /> event are the highest ever recorded in those wells. <br /> VAPOR EXTRACTION SYSTEM ACTIVITIES <br /> Vapor Extraction System Operation <br /> The vapor extraction system was not in operation during this quarter. Additional repairs are <br /> necessary before the system can be placed back in operation. <br /> RECOMMENDATIONS <br /> Groundwater Monitoring and Sampling <br /> Reduce the sampling frequency for wells that are monitoring the plume of contamination <br /> originating from the onsite release to an annual schedule. Given the massive quantity of historical <br /> groundwater data at this site, continued quarterly sampling is not warranted. We also recommend <br /> that sampling responsibility for the wells that are affected by the offsite release(s) be transferred to <br /> the appropriate responsible parties. <br /> G:\GROUNDZE\ROEK\QMR\2005\2qm2OO5.doc <br />
The URL can be used to link to this page
Your browser does not support the video tag.