|
BOB COCHRAN JUN 2 8 2002
<br />CHEVRON PRODUCTS COMPANY
<br />PO BOX 6004
<br />SAN RAMON CA 94583-0804
<br />RE: Chevron Station # 9-2033 Site Code: # 1057
<br />508 Charter Way
<br />Stockton CA 05206
<br />WORK PLAN: Addendum to the Work Plan for Further Assessment
<br />DATED: June 11, 2002
<br />PREPARED BY: SECOR International Incorporated
<br />APPROVED: IX
<br />DISAPPROVED:
<br />ADDENDUM NEEDED
<br />ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299.37,subd(c)(3)]:
<br />1. Destruction of monitoring well MW -1 will be by completely over drilling the well, removing all contents of the
<br />borehole, and filling the borehole with neat cement grout pumped through a tremmie pipe to total depth.
<br />2. Proposed locations of MW -4, MW -5 and MW -6 willbe moved to north/northeast of MW -1. Screen intervals will be:
<br />MW -4, 30-40 feet bsg; MW -5, 55-60 feet bsg; MW -6, 80-85 feet bsg.
<br />3. Installation of two monitoring wells, MW -7 and MW -8, with proposed screen intervals of 80-85 feet bsg.
<br />4. Advancement offsite of seven cone penetrometer test borings to continue the lateral and vertical investigation of the
<br />groundwater contamination.
<br />COME NTS AND CONDITIONS:
<br />1. Verify prior to beginning fieldwork that the proposed locations of MW -5, Mfw-6 and MW -7 will not put them in
<br />pea gravel backfill of the former tank pit.
<br />2. Access agreements from offsite property owners, and encroachment permits for work proposed in the city right-of-
<br />way must be obtained and copies submitted to. SJC/EHD prior to issuance of county well permits.
<br />3. County well permit applications, one per parcel of land, and required $89.00 permit fee must be submitted to
<br />SJC/EHD.
<br />4. A report of findings must be submitted to SJC/EHD within 60 days following completion of the fieldwork.
<br />(,&VCLC Ot\
<br />Lori Duncan, Senior REHS
<br />LOP/Site Mitigation Unit IV
<br />cc: Marty Hartzell, CVRWQCB
<br />Greg McIver, SECOR
<br />Nuel C. Henderson, Jr., R.G.
<br />LOP/Site Mitigation Unit 1V
<br />!
<br />FILE k11 0"
<br />ENVIRONMENTAL HEALTH DEPARTMENT
<br />SAN JOAQUIN COUNTY
<br />Unit Supervisors
<br />Donna x. xeran, RE.H.S.
<br />304 East Weber Avenue, Third Floor
<br />earl Borgman, R.E.H.S.
<br />=
<br />•
<br />Director
<br />Al Olsen, RE.H.S.
<br />Stockton, California 95202-2708
<br />Mike Huggins, R.E.H.S., R.D.I.
<br />Douglas W. Wilson, RE.H.S.
<br />C4l/FOPN`P•
<br />Program Manager
<br />Telephone: (209)468-3420
<br />Margaret Lagorio, R.E.H.S.
<br />Laurie A. Cotulla, R.E.H.S.
<br />Fax: (2O9) 464-0138
<br />Robert McClellon, R.E.H.S.
<br />Program Manager
<br />Mark Barcellos, R.E.H.S.
<br />BOB COCHRAN JUN 2 8 2002
<br />CHEVRON PRODUCTS COMPANY
<br />PO BOX 6004
<br />SAN RAMON CA 94583-0804
<br />RE: Chevron Station # 9-2033 Site Code: # 1057
<br />508 Charter Way
<br />Stockton CA 05206
<br />WORK PLAN: Addendum to the Work Plan for Further Assessment
<br />DATED: June 11, 2002
<br />PREPARED BY: SECOR International Incorporated
<br />APPROVED: IX
<br />DISAPPROVED:
<br />ADDENDUM NEEDED
<br />ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299.37,subd(c)(3)]:
<br />1. Destruction of monitoring well MW -1 will be by completely over drilling the well, removing all contents of the
<br />borehole, and filling the borehole with neat cement grout pumped through a tremmie pipe to total depth.
<br />2. Proposed locations of MW -4, MW -5 and MW -6 willbe moved to north/northeast of MW -1. Screen intervals will be:
<br />MW -4, 30-40 feet bsg; MW -5, 55-60 feet bsg; MW -6, 80-85 feet bsg.
<br />3. Installation of two monitoring wells, MW -7 and MW -8, with proposed screen intervals of 80-85 feet bsg.
<br />4. Advancement offsite of seven cone penetrometer test borings to continue the lateral and vertical investigation of the
<br />groundwater contamination.
<br />COME NTS AND CONDITIONS:
<br />1. Verify prior to beginning fieldwork that the proposed locations of MW -5, Mfw-6 and MW -7 will not put them in
<br />pea gravel backfill of the former tank pit.
<br />2. Access agreements from offsite property owners, and encroachment permits for work proposed in the city right-of-
<br />way must be obtained and copies submitted to. SJC/EHD prior to issuance of county well permits.
<br />3. County well permit applications, one per parcel of land, and required $89.00 permit fee must be submitted to
<br />SJC/EHD.
<br />4. A report of findings must be submitted to SJC/EHD within 60 days following completion of the fieldwork.
<br />(,&VCLC Ot\
<br />Lori Duncan, Senior REHS
<br />LOP/Site Mitigation Unit IV
<br />cc: Marty Hartzell, CVRWQCB
<br />Greg McIver, SECOR
<br />Nuel C. Henderson, Jr., R.G.
<br />LOP/Site Mitigation Unit 1V
<br />
|