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Rancho Cordova, CA 95670 <br />Phone 916-464-4733 <br />From: Don Stevens [mailto:dstevens(aecostmanage.com ] <br />Sent: Thursday, April 16, 2015 9:09 AM <br />To: Pierce, Marcus©Waterboards <br />Cc: Luis Mercado; USARMY NG CAARNG May Belinda A LTC; SPL Opperman Janice <br />Subject: Re: CA ARNG Stockton FMS <br />Marcus, <br />This is great news. Please let us know what your supervisor thinks. Appreciate you working with us during the budgeting <br />phase to make this project successful. <br />Talk to you next week. <br />Donald Stevens PE <br />Office: 916-706-3379 <br />Mobile: 559-824-8711 <br />Environmental cost management, inc <br />On Apr 16, 2015, at 8:56 AM, Pierce, Marcus@Waterboards <Marcus.Pierce@waterboards.ca.gov> wrote: <br />Don, <br />Thanks for the info. I doubt we will need a new work plan and you should be able to work under the <br />existing Notice of Applicability. We may need a formal letter notifying us of your intent to conduct <br />another round of injections, but I will discuss that with my supervisor when I am back in the office next <br />week. <br />Marcus <br />From: Don Stevens [dstevens@ecostmanage.com ] <br />Sent: Tuesday, April 14, 2015 5:17 PM <br />To: Pierce, Marcus@Waterboards <br />Cc: Luis Mercado <br />Subject: RE: CA ARNG Stockton FMS <br />Marcus, <br />Below are answers to your questions. Please let me know if the 2015 ISCO injection and soil sample <br />collection can be performed under the 2014 approved work plans as we are budgeting for the project <br />currently. Also, please let me know if the existing R5 permit can be extended to cover this work. <br />Injection intervals are planned to be within the same area and roughly the same injection <br />interval from 35-55 ft bgs. We are proposing to add a soil boring from the injection interval that <br />matches the performance monitoring parameters. However, the approved 2014 work plan <br />included 2 soil samples for ISCO design/performance parameters. <br />Injection strength will be similar, roughly 14%+/-, as the last injection. <br />The recent results do not trigger contingency plans. <br />No issues from the prior injection events. <br />Injection is proposed to happen between June —July 2015. <br />3