Laserfiche WebLink
Advanced <br /> GeoEnvironmental s � Ac <br /> � 1 <br /> 13 November 1997 <br /> AGE-NC Project No 95-0128 <br /> Mr Ron Rowe <br /> SAN JOAQUIN COUNTY FHS-EHD <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject ARCO MINI-MART - Work Plan Addendum Approval Request <br /> 4511 Paciflic Avenue, Stockton, California t� <br /> Dear Mr Rowe 5N <br /> In accordance with your request, Advanced GeoEnvironmental, Inc , (AGE) has pre ared the <br /> enclosed figures and justifications to aid your review of the IVork Flan 4ddendwn - October 1997 <br /> (til PA) dated 08 October 1997 The information you requested and additional infoimation in this <br /> lettet includes site map with soil plume and lines of cross section, sti atigraphic crosssections of the <br /> site, including the estimated extent of hydi ocai bon-impacted soils in the vadose zone-,/(depicting total <br /> petroleum hydrocarbons as gasoline), site pian with known dissolvers plume co centiations and <br /> hypothetical plume extent, results from the most recent ground water momt ing fol iron and <br /> manganese, and bio-actiN ity, well survey for the surrounding ?000 feet from the ite, and reasoning <br /> and justification for moving forward at this time with the WP <br /> AGE believes that it is time to move forward with at least an )tern cora tive a tion as outlined <br /> in the 'NPA to ieduce the volume of hydrocarbons dissolving i to round Ovate and to retard the <br /> moN ement of hydrocarbon contaminants off-site wheie any moni ng and/ remediation efforts <br /> will be more complex and costly The giound water elevation on the p erty has had a long term <br /> i ise from January 1993 to July 1997 As the ground water elevation has risen, ground water has <br /> encountered soil impacted by increasing concentiations of hydrocarbons, and presumably increasing <br /> concentrations of additives such as MTBE and oxygenated t olatile compounds At the present time, <br /> till iJllk1111 of dEjJVIvGd 11.y!'CearblPtlJ 11ctJ 11Vt UGCII liClilted 'VY1l11UUt dGllllltlllll, J1LL111G JtdVillLy <br /> cannot be demonstrated <br /> EFFECTS OF RISING GROUND WATER ELEVATION AND HYDROCARBON IMPACT ON <br /> GROUND WATER <br /> Referral to Figure 1 - Srte Plan Frguie 2 - 0oss Section A-A ', and Figure 3 - Cio5s Section B-B' <br /> will be of aid to following the discussion below <br /> 4005 North Wilson Way, Stockton,California 95205 <br /> Telephone(209)467-1006 FAX (209)467-1118 <br />