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/XI <br /> aV vlu <br /> PUBLIC HEALTH SERVICES <br /> ).• =,mss ..pG <br /> SAN JOAQUIN COUNTY Z. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 CC <br /> 209/468-3420 <br /> u <br /> CHEVRON PIPE LINE COMPANY <br /> OCT 101997 <br /> KATIE HOWER <br /> 4000 EXECUTIVE PKWY BISHOP RANCH 8 <br /> SAN RAMON CA 94583 <br /> RE: Hanson Family PTP SITE CODE: PR#506227 <br /> 7750 Schulte Rd. <br /> Tracy, CA., 95736 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD), has reviewed the <br /> "Results of Additional Soil and Groundwater Investigations and Request for Site Closure" as submitted by <br /> Geomatrix Consultants on October 3, 1997 and has the following comments. <br /> PHS-EHD agrees with the conclusion that the constituents from the long abandoned crude oil pipeline <br /> have not significantly impacted the soil and groundwater at the northern end of the property. Repeated <br /> groundwater samples have indicated that no petroleum constituents were detected at approved methods <br /> and detection limits. The polynuclear aromatic/polyaromatic hydrocarbons(PNA/PAH) detected in the <br /> soil from "SB-2", "SB-3", and monitoring well "TW-1", were below EPA Region IX Preliminary Remediation <br /> Goals (PRG's). <br /> With the removal of the pipeline in the 1950's and with no detectable petroleum hydrocarbons or <br /> PNA's/PAH's detected in the groundwater, it is the opinion of PHS-EHD that further investigation at the <br /> north end of the parcel is not warranted. <br /> The monitoring well currently onsite will need to be destroyed. Please submit a completed well <br /> destruction permit application, $60, and a short workplan describing the destruction details to PHS-EHD <br /> within thirty (30) days. You will be notified of the permit issuance so a field inspection can be scheduled. <br /> Thank you for your cooperation during this investigation and PHS-EHD appreciates your willingness to <br /> voluntarily follow investigative recommendations and your timely responses. <br /> You may contact Michael Infuma at(209) 468-3454 if you have any questions. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> --P� 9�j� ; <br /> Michael J. Infurna Jr., Senior REHS Margar Lagorio, RE� <br /> Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: GeoMatrix Consultants—Elizabeth Lu, PO Box 5059, San Ramon, CA.,94583. <br /> c: Maxine Hanson, 7750 Schulte Rd., Tracy, CA.,95736. <br /> A Division of San Joaquin County Health Care Services <br />