Laserfiche WebLink
�• Water Quality �ntrolBoa <br /> California Regional Region <br /> Central Valley Gray Davis <br /> Steven T.Butler,Chair v 'Governor <br /> Sacramento Main Office i....,., <br /> Winston H.Hickox iiwww.s-cb.ca.gov/.wgcb5 — <br /> Secrelnryfor Internet Address: ht�'Sacramenro,California 95827-3003 <br /> 3443 Routier Road,Suite A, 916)255-3015 -Environmental phone(916)255.3000•FAX( <br /> Protection <br /> 9 June 2000 <br /> Ms.Margaret Lagorio <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton,CA 95202 <br /> REVIEW OF WORKpLAN FOR GROUNDWAI ER AJSESSMU N COUNTY <br /> ON PASS, TRACY,SAN JOAQ <br /> ARCO#6100, 25775 PATTERS tori) submitted by Delta <br /> Workplan or Groundwater Assessment(Workp he Workplan describes completing <br /> 1 reviewed the 5 June 2000 Wncor orated(Delta)for the subject property. the area k highest describes <br /> azbon soil <br /> Environmental Consultants, Incorporated ground surface(bg ) tete the boring. Soil samples will be <br /> one boring to a maximum depth of 200 feet below <br /> dulling rig to comp <br /> impact. Delta will utilize an air-rotary i-ha at 100 feet,samples will be collected at every 10 feet to the <br /> All samples will eg analyzed for TPHg,BTEX by EPA Methods 8015/8021,and for all <br /> collected at 30, 50,70,and 100 feet, and beginning <br /> total depth of the boring. EPA Method 8260B. <br /> fuel oxygenates, ethanol,methanol, 1,2-DCA,and EDB by <br /> Delta also stated in the Workplan that they would extend the boring to groundwater or until two consecutive Soil <br /> samples,over a distance of 20 feet,have been collected OOO letters Arco musthat do not contain ldetmermine whether petroleum <br /> hydrocarbons. This is ot <br /> approved. As stated in our 14 March 2000 and 16 May <br /> ted groundwater.Therefore,the proposed investigation must <br /> hydrocarbons released from their USTs has impac <br /> identify the petroleum hydrocarbon impact to groundwater. <br /> The Workplan is approved with the following revisions: <br /> Complete the proposed boring on the southeast side of Patterson Pass Road near existing V-dwr well <br /> VW-17 as stated in the Workplan narrative,not as shown on Workplan Figure 2- <br /> The boring must extend to groundwater or a minimum of 200 feet bgs. <br /> Please inform me when the fieldwork will start. If you have any questions or comments,call me at <br /> (916) 255-3115. <br /> Marty Hartzell <br /> Associate Engineering Geologist <br /> California Environmental Protection Agency <br /> Vs Recycled Paper <br />