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12/16/2003 09:24 209462"'13 FIFTH FLOOR PAGE 02 <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unitsupervisors <br /> c,. .r . Doone K HeraRE.H.S. 304 East Weber Avenue Third Floor Carl Borgman,RE.H.S. <br /> "e '< Directoror ' Mike Huggins,R.E_H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. $LOC1CtOn, California 95202-2708 Douglas W.Wilson,RE.H.s- <br /> i+':, a;P Program Manager Telephone: (209) 468-3420 Margaret Legono,R.E.H.S. <br /> ancon Laurie A.Cotulla,RE.H.S. <br /> ram Manager Fax: (209)464-0138 Robert McClellon, E,H. <br /> Pro <br /> g ` R <br /> � Mark Barcellps, E.H.S. <br /> BOB COCHRAN <br /> CHEVRON PRODUCTS COMPANY <br /> 6001 BOLLINGER CANYON RD <br /> BUILDING V PO BOX 6004 <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 /> STAT�I S APPROVED, with conditions in comments below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN IH&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 PIAN fH&S 25299.37. <br /> 3 : <br /> • none <br /> DATED: December 16, 2003. BY: ///z &9 <br /> S6r/ <br /> Ichael lnfVfna, RE (209)468-3454 <br /> [X] Faxed to consultant on: /Z i <br />