Saturday
She had written it on the margin of a receipt on Friday night, smaller than everything else, because nobody would read the margin of a receipt: THEY WILL BUILD THE INDEX ANYWAY. They built it before she finished her coffee.
Saturday, half past eight. The tablet was propped against the sugar tin again, the way it had been on Tuesday for the carriers' thirty-one pages. Desert Mutual's buyer app had a new tile on every Maricopa listing, under the overlay colours, a pale blue drop with BETA in the corner.
AMBIENT WATER INDEX
She opened the nearest listing to the Ortiz lot, a duplex on 40th Street. LOW. Then she opened the parcel map, which was not for buyers, and tapped the lots around Benigno's one at a time, east to west, the way she'd walk a grid.
The Iglesia Bautista Camelback was not for sale. The map scored it anyway.
AWI 2/24/49: HIGH. Basis: certified gravity series, 1 nearby (Maricopa notary #118). Furniture array, 3 heads. Irrigation schedule data: licensed.
She read notary #118 three times. Then she found the methods note, eleven pages, and read until page six, where it was. Every certified base series filed with Records was pulled from the public certificate feed and pinned to the coordinates of its base post. From there it was spread to every parcel within sixty metres, with a weight that fell off with distance. Her +0.55, read under Benigno Ortiz's carport at four in the morning, had been smoothed across the alley and over the block wall, and it had come down on the church lawn at about +0.4.
On the certificate she'd written CAUSE NOT ESTABLISHED. Above the table she'd typed, as a voluntary statement because rev. 2 wasn't a rule, NOT EVIDENCE OF ANY PERSON'S ACT. The index didn't read the certificate. It read the table and the coordinates, and the coordinates belonged to nobody until a map gave them to somebody.
She did the geometry again. Water standing on the church lawn, twenty metres from her base, would read a few hundredths at the base. She'd said that to Carrasco at First American on Thursday to get Benigno's rider back. Run it the other way and it held exactly the same: what she'd measured under the Ortiz carport said nothing about the lawn. The index had taken a number about one lot and turned it into a number about the church.
She took screenshots of the tile, the methods page, and the line that said kernel radius 60 m. She saved them in the Ortiz folder. Then she copied them into the docket folder too, because she already knew where they were going.
On Tuesday's envelope, under $9.8M, she wrote: 3/6 AWI LIVE. MY 0.55 SMEARED 60 M ONTO THE CHURCH. READS THE TABLE, NOT THE SENTENCE.
Monday
He called at noon. He'd found her the way the index had, by the certificate number. On the phone he was polite in the careful way of a man whose bank had just told him his church was wet.
The fellowship hall smelled of floor wax and of coffee in a forty-cup urn. There were folding tables, a bulletin board of baptism photos, and a child's drawing of Noah in which the giraffes were much too big for the ark. Pastor Efraín Salcido was in his sixties, in short sleeves, with the church's key fob on a lanyard. Beside him sat Nora from the finance committee, with the letter in a clear plastic sleeve. The bank hadn't sent the reason at first. Nora had asked for it in writing, because a lender that turns down or refers an application owes the applicant the reason, business credit included, and it was the reason that came back with the index's name in it.
Your application for the Camelback Solar Roof Loan has been referred for manual review. Ambient Water Index indicates recent HIGH subsurface water activity on the parcel.
"Did you say we flooded the Ortiz house?" he asked.
"No. I measured under the Ortiz house. I didn't measure your lot. I don't know what's under it." She put the certificate on the table, open at page eleven, with the sentence above the base table. "Somebody took my number and spread it sixty metres. Your lawn got part of the spread."
Nora read the sentence out loud. "Not evidence of any person's act."
"It isn't. Their index doesn't read that line."
The pastor sat down on a folding chair, slowly, testing it. "We order a turn every second Wednesday in the winter," he said. "Salt River sends it at eleven at night. The twenty-fourth was ours. Eleven to two. The lawn was under water when the men's group left."
Her pen was in her jacket pocket. She left it there.
The rise began after one. She didn't say it. She could feel it sitting on her tongue, the way a reading sits on a screen before you write it down: three hours of water, an old block wall with weep holes at the bottom, a south third that came up monotonic from 01:10. Any surveyor in the county would put those things in a line. A model in Tempe would put them in a line in a quarter of a second.
A careful surveyor wouldn't, and she made herself be one. She ran Saturday's sum the other way round. Water on that lawn, twenty metres off, was worth a few hundredths at her base. The south third had come up more than half a microgal. The turn fit the hour. It didn't fit the size. It only worked if the water had gone down through the weep holes and under Benigno's slab, and nobody had measured that path, not her and not Tempe. Writing his Wednesday next to her table wouldn't only be unfair to him. It would put a cause on paper that she couldn't show.
"Pastor, you don't have to tell me that."
"It's true."
"I believe it's true. It still isn't mine to carry. If I put it next to my numbers, then my numbers are about you. I spent last week trying to stop exactly that."
He rubbed his thumb along the lanyard. "Then what do I tell the bank?"
"That the index puts other people's measurements on your parcel. And that the notary who made the measurement says so, in writing."
She took a blank sheet from Nora's folder and wrote it there in three sentences, with her licence number and her signature. The series cited by the Ambient Water Index for this parcel was measured on a different lot. I did not occupy this parcel. No measurement of this parcel exists in my records. She left out turns and times, and she left out Wednesdays.
"If they want to know what's under your lot," she said, "somebody has to stand on your lot. And the bank should pay for that, not you."
Nora slid the sheet into the sleeve, on top of the bank's letter, so it would be the first thing anyone saw.
On the way out she crossed the lawn to the car. It was dry, Bermuda grass gone tan for the winter, and someone had painted a sprinkler head orange so the mower wouldn't take it off. She didn't look at the wall.
On the dashboard card: 3/8 SALCIDO. AWI HIGH HELD SOLAR LOAN. HE TOLD ME THE TURN. DID NOT WRITE IT DOWN. WROTE: INDEX ASSIGNS MY SERIES TO HIS PARCEL.
Then, because it was true, smaller: I WROTE DOWN THAT I DIDN'T.
Wednesday
Twenty to ten at night. The reply comment was two pages and finished, and she was about to make it three.
She'd already crossed out the obvious fixes on the back of the draft. Take the base series off the public feed: no. Every certificate in Maricopa had been public since the 2041 statute, and the public feed was how Delfina had found the Leyva pages, and how Aguirre had known what to seal. She wasn't going to hide numbers to stop a company from reading them. File the table as an image instead of as data: that would slow a machine down by about a week.
Abuela was awake tonight, at the far end of the table, peeling a tangerine in one long piece, with the novela on mute.
"What are you writing?"
"Who's allowed to say a number about a house."
"You."
"Me, if I stood on it. Not if I stood next door."
That was the rule, and she wrote it plainly. Section 4 of the reply:
A value stated for a specific parcel and derived in whole or in part from a certified gravity series is a survey product. It may be published only over the signature of a licensed notary who has occupied that parcel. A model may compute it. A model may not sign it.
It was the holder rule again, the one Fermín Robles had taken up in January: every number has a person behind it who can be asked about it. The carriers would say it killed the index. It didn't. It left them an index of blocks, the furniture array, the licensed schedules. All it took away was the sixty-metre kernel at the scale of one parcel, and the kernel had never been true at that scale. That was why walking holds existed.
This time she knew whose rule it would be. At the end of February she'd had to send item 2 to DIFI, because the Board couldn't reach an insurer. Section 4 didn't need to reach one. Stating a survey value for a parcel without a licence was unlicensed practice, and unlicensed practice was the one thing the Board could go after anybody for.
Desert Mutual's answer was easy to write for them, so she wrote it first: the AWI isn't a value stated for a parcel, it's a rating variable, and rating variables belong to the insurance regulator. That would have been a good answer if the tile had cited a model. It cited her. Basis: Maricopa notary #118. A rating variable doesn't need to borrow a licence number. It borrows one because a licence number makes a guess read as a measurement. She added a second sentence to section 4: A published value that names a licensee as its basis is held out as that licensee's work. That was the sentence the Board could actually use.
Exhibit A was the array spec sheet, footprint radius circled, already attached. Exhibit B was new: the AWI tile on the church, HIGH, notary #118, a lot she had never occupied. Exhibit C, with Nora's permission, was the reason line of the bank's referral, the first place the index had shown up on paper outside Desert Mutual. She typed a parcel I did not occupy and stopped. Salcido's turn stayed out of the exhibit, out of the comment, out of the folder.
She costed it on the back of the envelope, out of habit. Section 4 cost the carriers one product. It cost the public nothing. It cost her, if the Board took it, a few hundred more requests a year from people who wanted a name under a number. That was work, and she'd do it.
Abuela handed her half the tangerine across the table. "So now you're the only one allowed to guess."
"No. Now nobody's allowed to guess and sign it."
"That's more crossing out."
"It's adding."
"You said that last time," Abuela said, and turned the sound back on.
On the fridge, under NOT A PERSON. A LOT., she wrote: AND ONLY THE LOT YOU STOOD ON.
Friday
A 1962 slump-block house on Osborn, east of 44th Street. Thuy and Bao Nguyen had both retired from Honeywell and were selling to move closer to a daughter in Mesa. The lot was flood-irrigated, like everything on that side of the canal, and the overlay was clean, with nothing yellow on it. Their AWI tile said MODERATE. The Nguyens hadn't known they had one until their agent told them.
Seven in the evening. She was going to use item 5 tonight. Aguirre had put her pen on the hole at the Records window in February: what if the lot is already wet when you arrive? Open on wet ground and every base after that is measured against water you can't see. Nobody required item 5. She ran it anyway.
The dry reference for this lot was the head's median at the same nail in the slab, from her 2047 survey and two dry re-occupations on file at Records. On its own that was a number from two years ago, and two years moves more than 0.1. A third of a millimetre of heave in a 1962 slab on irrigated clay was 0.1 µGal by the free-air gradient alone. The valley's water table had moved metres since 2047, and that was microgals that belonged to no lot at all. So at half past five she'd set the same head on the county reference pier at Papago, granite, nothing irrigated within two hundred metres, and read it against its own 2047 median. It was down 1.8 µGal. That was the regional water, and it came off the Nguyen number before anything else did.
The head went on the patio slab two metres off the back door, on concrete that hadn't been wet since Sunday. She put the steel rule from the nail to the head's reference mark and read it twice: 0.4 mm lower than the 2047 setup, which was +0.12 µGal she hadn't earned. 19:10, base. She read the 0402 head's dry January nights off her own card: fourteen of them, base-to-base scatter 0.09 µGal, worst 0.27. Opening base against the dry reference, after tide, pressure, height, and the Papago tie: 0.04.
Inside the 0.1 her rev. 2 allowed. Inside the scatter. The pier was six kilometres off, so the tie assumed the regional water had moved the same at both. She wrote that down too. The lot was dry when she started, as far as a tied reference could say.
Nine posts, east to west. A base every ninety minutes. 20:40, flat. 22:10, +0.03. 23:40, flat. At midnight the neighbour to the east got a turn. She heard the gate grind up, and then water running into his yard, which sounds like nothing else at that hour. 01:10, flat. 02:40, −0.02. 04:10, flat. 05:40, +0.02.
Nothing in the series. That didn't mean the neighbour's water had stayed on the neighbour's lot. Water across the fence was worth a few hundredths here at most, by the same sum as the church lawn. A flat series was what she'd have got whether it stayed put or soaked his whole yard. All the slab could say was that nothing came under it.
Bound standard. CAUSE line: NONE OBSERVED. A new line under the table: Opening base vs dry median at this nail, height measured, tied same night to Papago pier (−1.8 regional removed): 0.04 µGal (0402 dry scatter 0.09).
At twenty past six Bao came out with coffee in a mug from a Honeywell safety day in 2031.
"Moderate," he said. "The app says moderate."
"The app is guessing from your neighbours' water bills. I stood on your lot all night. It's dry."
He looked at the patio, at the tripod, at her. "Which one does the buyer believe?"
"The one with a name on it, I hope. Mine's on page eleven."
Card in the glovebox: 3/12 NGUYEN. OPEN BASE VS DRY MEDIAN 0.04. DRY START. FLAT. NEIGHBOUR TURN 00:00: NOT RESOLVABLE FROM THIS SLAB. AWI 'MODERATE' FROM BOUGHT SCHEDULES. MINE SAYS DRY.
She sat for a minute with the engine off, with the coffee. It was the first night in a month she'd measured something and nobody could be hurt by it, and she found she didn't trust that.
Monday
Comment deadline. She could have filed on the portal from the kitchen. She drove downtown instead, because she wanted to see Rosaura Aguirre's face when she got to section 4.
Records, Jefferson Street, third floor. A ticket machine that talked, a row of chairs bolted to a rail, and a 2044 poster explaining the overlay colours that nobody had updated since yellow got a second shade. Aguirre came out from the back with her reading glasses on a chain and took the folder without sitting down.
She read section 4 standing up. Then she turned to Exhibit B, and her mouth went flat.
"Notary 118," she said. "They put you on the church."
"They put me on everybody within sixty metres."
Aguirre turned a page, and then turned it back. "You should know something before this goes in. Desert Mutual filed last Thursday for the bulk certificate feed. Every certified series since 2041, nightly, machine-readable. Under the statute they get it. Public is public. I can't say no."
"I don't want you to say no."
"Then what do you want?"
"I want section 4 answered before their index learns to sign." She kept her voice level. "The feed's fine. My numbers should be public. What isn't fine is a score for a parcel with my licence number on it, for a lot I never stood on."
Aguirre didn't answer for long enough that the ticket machine called A-41 twice, to nobody. Then she took a pen from behind her ear.
"I can't make that rule. The Board can. I'll put it to them on 49-007, next to your holder rule. Question four." She wrote it on the front of the folder in her own hand: Is a parcel value derived from certified series a survey product? "They take a month. Desert Mutual's feed starts in two weeks."
"So two weeks of my number on the church."
"Two weeks of your number on everybody," Aguirre said. "Unless you'd like to stop filing."
"No."
"I didn't think so." She stamped the comment RECEIVED 3/15/49 09:14 and handed back the copy.
In the elevator Lourdes's phone buzzed. Nora, the finance committee:
Bank accepted your letter. Loan back in queue. Pastor says thank you, and that he hasn't told anyone about the turn but you.
She read it twice and didn't answer.
Outside on Jefferson, a lamp-post head was ticking over in its grey case above the bus shelter, integrating the block, the courthouse, the parking structure, every pipe and every lawn and everybody's Wednesday. It couldn't tell one lot from another. In two weeks a feed would give it her numbers, and her numbers came with coordinates.
On the back of the stamped copy, in the margin:
3/15 REPLY FILED. SEC 4 DOCKETED 49-007 Q4. DM BULK FEED IN 2 WKS. SALCIDO LOAN BACK IN QUEUE.
And under it, smaller, because nobody would read the back of a stamped copy:
HE TOLD ME. I'M THE ONLY ONE WHO KNOWS. THAT'S A RECORD TOO.