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F.. <br /> NO <br /> OCT-113-89 WED i T :, TJEL.TA ENVIRONMENT <br /> • t " <br /> t <br /> 1t <br /> tEnvironmental <br /> //A Consultants,Inc. <br /> 3330 Data Drive <br /> Rancho Cordova,CA 95670 <br /> 916/636-2055 <br /> FAX,Eit 8/638,6385 <br /> October 18, 1989 uRAF <br /> Mr. Gregory Lyon <br /> San Joaquin County l� <br /> Public Health Scr,ices OCT 181989 <br /> 1601 Fast Hazel►4 4 Avenue; <br /> Stockton, California 93201 ENVIRONMENTAL HEALTH <br /> PERMIT I SERVICES <br /> Subject: Soil RemedlMion <br /> Moore Petroleum; Inc, <br /> 1399 Last Yosemito Avenue <br /> Manteca, CA <br /> Delta Project No. 40.88-480 <br /> Dear Mr.Lyon: <br /> As we discussed earlier today this letter will document Delta's plans frsr remediat[n8 soil <br /> at the above referenced site. Delta has had much success in sail venting soils containing <br /> hydrocarbon constituents at a number of sites in northern California. Because of the <br /> ' sandy naturs of lite soils at this site it is Delta's profLisional opinion that these soils era <br /> .,Veil suited for soil vonting. Our plats for soil venting soils at this site consists of laying <br /> two 30-foot lengths of 4-inch-diameter PVC well scr= in the base of tht former tank <br /> basin (Rigure 1), 'mese lengths of well screen will be connected by a 20-Foot length of <br /> 4-inch PVC blank casing. The PVC blank casing will be manifolslcd to the surface and <br /> connected Evia a shallow trench) to a small blower or fan that will draw soil gas <br /> tontaittimg Ctydrocarbon constituents from the soils underlying the site. The proposed <br /> location of the blower (or fan) and stack fur the soil venting system, is shown on Figure <br /> 1. Location of soil samples taken from the tank basin are shown an Figure 2. sail <br /> sample laboratory reports are enclosed. <br /> Following installation of the PVC Weil sc,cen in the base of the former tank excavation, <br /> the excavation will leo backfilled with clean 5111 (as needed) and soils remaining on the <br /> - - - <br /> - ---site-which had_originally been removed from the excavation. Fallowing backfilling and <br /> prior to rebuilding the gasoline station a' thu elle;the former tank basin .an associated <br /> trenching will be covered with an approximately 2-inch layer of asphalt p;tvoment. <br /> After installation of the system discussed in LIds letter, a tmure formai sal! rantcdintfon <br /> pian will be completed and submitted to Son Joaquin County Public health Services. <br /> Prior to operation of the soil venting system the appropriate. permit(s) will be oblainee <br /> from the San Joaquin Air Pollution Control District (SJAPCD). <br />