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ENVIRONMENTAL HEALTH DEPARTMENT <br /> Q <br /> SAN JOAUIN COUNTY <br /> so._�f.caG Unit Supervisors <br /> 2`` ? Donna K.Heran,R.E.H.S. Carl Bor man,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor g <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> �... Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> q CiFO,Rej <br /> Laurie A.Co R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Bareellos,R.E.H.S.. <br /> BOB COCHRAN Fain <br /> CHEVRON PRODUCTS COMPANY <br /> 6001 BOLLINGER CANYON RD <br /> BUILDING V PO BOX 6004 FILE COPY <br /> SAN RAMON CA 94583-0904 <br /> RE: Former Chevron #9-4054 Site Code:1780 <br /> 2103 Country Club Blvd. RO#00635 <br /> Stockton, CA., 95204 <br /> WORK PLAN: "Work Plan for Assessment and Aquifer Testing" <br /> DATED: December 8, 2003 <br /> PREPARED BY: Secor— George E. Forsythe, R.G., C.HG. <br /> STATUS: APPROVED, with conditions In comments below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN (H&S <br /> 25299.37 subd(c)(3)1: <br /> • Install at least nine (9) CPT push point soil borings onsite to —30' bgs and <br /> collect soil samples to assess soil stratigraphy and for analyses of TPHg, <br /> BTEX, MtBE, TAME, EtBE, DIPE, EDB, and 1,2-DCA and, <br /> • Install a groundwater extraction well, at least three piezometers, perform <br /> aquifer pump and draw down tests, and submit revised CAP to EHD. <br /> COMMENTS AND CONDITIONS: <br /> • Groundwater samples should be collected and analyzed for same <br /> constituents if CPTs extend to >30' bgs and, <br /> • EHD correspondence (October 14, 2003) required Chevron to repair all <br /> monitoring wellheads before the next quarterly monitoring event. The <br /> recent fourth quarter event was hampered by buried and hard to locate <br /> monitoring wellheads. All monitoring wells are to be in concrete <br /> pedestals, traffic rated boxes or stovepipes, protected by locking, <br /> waterproof caps, and resurveyed by December 31, 2003. <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN rH&S 25 99.37, <br /> subd c 3 : <br /> none <br /> DATED: December 16, 2003. BY: s6 r9 <br /> ichael Inf na, RE (209) 468-3454 <br /> [X] Faxed to consultant on: /Z ��I <br />